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Sample records for dental articulators

  1. Articulation in dental hygiene education from the student's perspective.

    PubMed

    Glick, N L

    1989-01-01

    Articulation deals with the transfer of associate degree and certificate dental hygiene students to four-year colleges or universities to complete baccalaureate degrees in the most efficient manner possible. Since a buyer's market exists in higher education at the present time, informed student consumers can select degree completion programs that will best meet their specific long-term career goals. The advantages of securing the bachelor's degree, the degree completion options available, and the factors that affect the articulation process are discussed. Recommendations are offered on how to acquire information about degree completion programs. Questions that students should ask before making a final choice of a four-year institution are also presented. Advance planning by students is a key to future mobility and career adaptability in dental hygiene. To this end, high school and college counselors and faculty members in all dental hygiene programs are instrumental in the articulation process.

  2. Articulated dental cast analysis of asymptomatic and symptomatic populations

    PubMed Central

    Cordray, Frank E

    2016-01-01

    Dental instrumentation has long provided insight into the mechanism of musculo-skeletal function of the gnathic system. While large population studies associate dental arch displacement (DAD), especially laterally, with symptoms, mandibular condyle displacement (CD) resulting from DAD has not been targeted as possibly etiologic in the production of common muscle contraction headache (CMCH) and temporo-mandibular dysfunction (TMD). The objective was to evaluate the three-dimensional nature of DAD and CD between the seated condylar position (SCP) and the intercuspal position (ICP) and to compare results derived from large deprogrammed asymptomatic and symptomatic populations. A total of 1 192 sets of dental casts collected from asymptomatic and symptomatic populations were articulated in the SCP. The initial occlusal contact, DAD, and condylar displacement were evaluated for frequency, direction, and magnitude of displacement between the SCP and ICP. The data revealed significant displacement between the SCP and ICP of the condyles (displaced most frequently inferior (down) and posterior (distal)) and substantially increased frequency and magnitude of displacement of the dental arches (with posterior premature occlusal contacts, increased overjet, decreased overbite, midline differences, and occlusal classification changes) in symptomatic subjects. These discrepancies were statistically significant and clinically significant. The data support the concept of increased DAD and CD with dysfunction. Transverse condylar displacement, commonly presenting with dental cross bite, may be associated with CMCH and TMD. Displacement of the mandibular condyle may be an etiologic factor in CMCH and dysfunction of the temporo-mandibular joint. PMID:27357324

  3. An Articulation Model in Dental Assisting for the Commonwealth of Pennsylvania. A Continuation.

    ERIC Educational Resources Information Center

    Sylves, Jane M.; Boody, Sandra

    A curriculum development project was conducted to generate additional competency-based modules to be used within the articulation model for Pennsylvania dental assisting programs, established in 1988. Project activities included reviewing, modifying, and providing parallel competency-based structure for the courses at the A.W. Beattie Technical…

  4. 21 CFR 872.6140 - Articulation paper.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Articulation paper. 872.6140 Section 872.6140 Food... DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6140 Articulation paper. (a) Identification. Articulation paper is a device composed of paper coated with an ink dye intended to be placed between...

  5. 21 CFR 872.6140 - Articulation paper.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Articulation paper. 872.6140 Section 872.6140 Food... DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6140 Articulation paper. (a) Identification. Articulation paper is a device composed of paper coated with an ink dye intended to be placed between...

  6. 21 CFR 872.6140 - Articulation paper.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Articulation paper. 872.6140 Section 872.6140 Food... DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6140 Articulation paper. (a) Identification. Articulation paper is a device composed of paper coated with an ink dye intended to be placed between...

  7. 21 CFR 872.6140 - Articulation paper.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Articulation paper. 872.6140 Section 872.6140 Food... DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6140 Articulation paper. (a) Identification. Articulation paper is a device composed of paper coated with an ink dye intended to be placed between...

  8. Effectiveness of systematic articulation training program accessing computers (SATPAC) approach to remediate dentalized and interdental /s, z/: a preliminary study.

    PubMed

    Flipsen, Peter; Sacks, Stephen; Neils-Strunjas, Jean

    2013-10-01

    Traditional methods for treating speech distortion errors in older school-age children have tended to yield mixed success. The current study was a preliminary evaluation of an alternative approach called the Systematic Articulation Training Program Accessing Computers (SATPAC), which was tested for the remediation of /s/ and /z/. Procedures involved a sequence of phonetic placement and/or oral-motor placement cues as needed to establish the targets, followed by concentrated drill structured around a facilitating context nonsense word and then advanced to more natural contexts. Participants were 18 children aged 6 years, 9 months to 11 years, 10 months. Treatment involved once per week, individual, 10-min. sessions with an experienced speech-language pathologist. Group A (n = 9) received 15 weeks of treatment, while treatment was delayed for Group B (n = 9). Then the groups were reversed. During period one, Group A (treated) significantly improved their accuracy of /s, z/ in spontaneous speech, while Group B (untreated) showed no significant change. During period two, Group B improved significantly when treatment was applied. The majority of the participants retained proficiency two years later.

  9. Advancing Health Promotion in Dentistry: Articulating an Integrative Approach to Coaching Oral Health Behavior Change in the Dental Setting

    PubMed Central

    Howard, Anita R.

    2015-01-01

    Oral health is managed based on objective measures such as the presence and severity of dental caries and periodontal disease. In recent years, oral health researchers and practitioners have shown increasing interest in a widened array of physical, psychological, and social factors found to influence patients’ oral health. In this article, we introduce a behavior change coaching approach that can be used to enhance psychosocial diagnosis and client-centered delivery of health-promoting interventions. Briefly, this health coaching approach is based on an interactive assessment (both physical and psychological), a non-judgmental exploration of patients’ knowledge, attitudes, and beliefs, a mapping of patient behaviors that may contribute to disease progression, gauging patient motivation, and tailoring health communication to encourage health-promoting behavior change. Developed in a clinical setting, this coaching model is supported by interdisciplinary theory, research, and practice on health behavior change. We suggest that, with supervision, this coaching process may be learned. PMID:26457237

  10. Intersegmental Articulation.

    ERIC Educational Resources Information Center

    CATESOL Journal, 1996

    1996-01-01

    This English-as-a-Second Language (ESL) journal periodically devotes entire issues to specific themes. The theme of this issue is "Intersegmental Articulation" (especially in California schools). Articles include: "Why Is ESL a Burning Issue?" (Robby Ching, Anne Ediger, Debbie Poole); "Challenges Facing California ESL…

  11. Dental Training Films.

    ERIC Educational Resources Information Center

    Veterans Administration Medical Center, Washington, DC.

    This dental training films catalog is organized into two sections. Section I is a category listing of the films by number and title, indexed according to generalized headings; categories are as follow: anatomy, articulator systems, complete dentures, dental assisting, dental laboratory technology, dental materials, dental office emergencies,…

  12. Articulating feedstock delivery device

    SciTech Connect

    Jordan, Kevin

    2013-11-05

    A fully articulable feedstock delivery device that is designed to operate at pressure and temperature extremes. The device incorporates an articulating ball assembly which allows for more accurate delivery of the feedstock to a target location. The device is suitable for a variety of applications including, but not limited to, delivery of feedstock to a high-pressure reaction chamber or process zone.

  13. Articulation Costing. Phase II

    ERIC Educational Resources Information Center

    British Columbia Council on Admissions and Transfer, 2004

    2004-01-01

    Within the British Columbia post-secondary system, significant numbers of students transfer among colleges, institutes, universities and university colleges. These transfers may be handled individually student by student or through a set of articulation agreements administered and facilitated by the British Columbia Council on Admissions and…

  14. Intelligent Articulated Robot

    NASA Astrophysics Data System (ADS)

    Nyein, Aung Kyaw; Thu, Theint Theint

    2008-10-01

    In this paper, an articulated type of industrial used robot is discussed. The robot is mainly intended to be used in pick and place operation. It will sense the object at the specified place and move it to a desired location. A peripheral interface controller (PIC16F84A) is used as the main controller of the robot. Infrared LED and IR receiver unit for object detection and 4-bit bidirectional universal shift registers (74LS194) and high current and high voltage Darlington transistors arrays (ULN2003) for driving the arms' motors are used in this robot. The amount of rotation for each arm is regulated by the limit switches. The operation of the robot is very simple but it has the ability of to overcome resetting position after power failure. It can continue its work from the last position before the power is failed without needing to come back to home position.

  15. The psychoacoustics of musical articulation

    NASA Astrophysics Data System (ADS)

    Spiegelberg, Scott Charles

    This dissertation develops psychoacoustical definitions of notated articulations, the necessary first step in articulation research. This research can be useful to theorists interested in timbre analysis, the psychology of performance, analysis and performance, the psychology of style differentiation, and performance pedagogy. An explanation of wavelet transforms precedes the development of new techniques for analyzing transient sounds. A history of timbre perception research reveals the inadequacies of current sound segmentation models, resulting in the creation of a new model, the Pitch/Amplitude/Centroid Trajectory (PACT) model of sound segmentation. The new analysis techniques and PACT model are used to analyze recordings of performers playing a melodic fragment in a series of notated articulations. Statistical tests showed that the performers generally agreed on the interpretation of five different articulation groups. A cognitive test of articulation similarity, using musicians and non-musicians as participants, revealed a close correlation between similarity judgments and physical attributes, though additional unknown factors are clearly present. A second psychological test explored the perceptual salience of articulation notation, by asking musically-trained participants to match stimuli to the same notations the performers used. The participants also marked verbal descriptors for each articulation, such as short/long, sharp/dull, loud/soft, harsh/gentle, and normal/extreme. These results were matched against the results of Chapters Five and Six, providing an overall interpretation of the psychoacoustics of articulation.

  16. Articulating Success in West Virginia

    ERIC Educational Resources Information Center

    D'Antoni, Kathy J.; Coulson, Gene

    2008-01-01

    Two years in West Virginia, college filing cabinets were stacked high with articulation agreements. College faculty members were traveling to and from area high schools in an effort to develop and finalize articulation agreements; all part of the process. And to what end? Less than 1 percent of students in the state were taking advantage of the…

  17. Lingual articulation in songbirds

    PubMed Central

    Suthers, Roderick A.; Rothgerber, John R.; Jensen, Kenneth Kragh

    2016-01-01

    ABSTRACT Lingual articulation in humans is one of the primary means of vocal tract resonance filtering that produces the characteristic vowel formants of speech. In songbirds, the function of the tongue in song has not been thoroughly examined, although recent research has identified the oropharyngeal–esophageal cavity as a resonance filter that is actively tuned to the frequency of the song. In northern cardinals (Cardinalis cardinalis), the volume of this cavity is inversely proportional to the frequency of the song above 2 kHz. However, cardinal song extends below this range, leaving the question of whether and how the vocal tract is tracking these low frequencies. We investigated the possible role of the tongue in vocal tract filtering using X-ray cineradiography of northern cardinals. Below 2 kHz, there was prominent tongue elevation in which the tip of the tongue was raised until it seemed to touch the palate. These results suggest that tongue elevation lowers the resonance frequency below 2 kHz by reducing the area of the passage from the oral cavity into the beak. This is consistent with a computational model of the songbird vocal tract in which resonance frequencies are actively adjusted by both changing the volume of the oropharyngeal–esophageal cavity and constricting the opening into the beak. PMID:26685174

  18. Articulation points in complex networks

    PubMed Central

    Tian, Liang; Bashan, Amir; Shi, Da-Ning; Liu, Yang-Yu

    2017-01-01

    An articulation point in a network is a node whose removal disconnects the network. Those nodes play key roles in ensuring connectivity of many real-world networks, from infrastructure networks to protein interaction networks and terrorist communication networks. Despite their fundamental importance, a general framework of studying articulation points in complex networks is lacking. Here we develop analytical tools to study key issues pertinent to articulation points, such as the expected number of them and the network vulnerability against their removal, in an arbitrary complex network. We find that a greedy articulation point removal process provides us a different perspective on the organizational principles of complex networks. Moreover, this process results in a rich phase diagram with two fundamentally different types of percolation transitions. Our results shed light on the design of more resilient infrastructure networks and the effective destruction of terrorist communication networks. PMID:28139697

  19. Articulation points in complex networks

    NASA Astrophysics Data System (ADS)

    Tian, Liang; Bashan, Amir; Shi, Da-Ning; Liu, Yang-Yu

    2017-01-01

    An articulation point in a network is a node whose removal disconnects the network. Those nodes play key roles in ensuring connectivity of many real-world networks, from infrastructure networks to protein interaction networks and terrorist communication networks. Despite their fundamental importance, a general framework of studying articulation points in complex networks is lacking. Here we develop analytical tools to study key issues pertinent to articulation points, such as the expected number of them and the network vulnerability against their removal, in an arbitrary complex network. We find that a greedy articulation point removal process provides us a different perspective on the organizational principles of complex networks. Moreover, this process results in a rich phase diagram with two fundamentally different types of percolation transitions. Our results shed light on the design of more resilient infrastructure networks and the effective destruction of terrorist communication networks.

  20. Improving the digital workflow: direct transfer from patient to virtual articulator.

    PubMed

    Solaberrieta, Eneko; Minguez, Rikardo; Etxaniz, Olatz; Barrenetxea, Lander

    2013-01-01

    When designing a custom-made dental restoration, using a digital workflow represents an important advance over mechanical tools such as facebows or mechanical articulators. When using virtual scanning procedures, there is a direct transfer from the patient to the articulator. This paper presents a novel methodology to design custom-made restorations. This new approach permits the transfer of all data directly from the patient to the virtual articulator, always taking into account the kinematics of the mandible. Rapid further developments can be expected in the near future.

  1. Dental Amalgam

    MedlinePlus

    ... Products and Medical Procedures Dental Devices Dental Amalgam Dental Amalgam Share Tweet Linkedin Pin it More sharing options Linkedin Pin it Email Print Dental amalgam is a dental filling material which is ...

  2. Transforming Articulation Barriers in Nursing.

    ERIC Educational Resources Information Center

    Waters, Verle

    Barriers to educational mobility for nurses have existed since the mid-1960s. In 1963, the National League for Nursing (NLN) adopted a position that ruled out articulation of any kind between associate degree in nursing (ADN) and bachelors in science in nursing (BSN) programs. In the mid-1970s, a countermovement took shape, supporting open…

  3. Associate/Bachelor Degree Articulation.

    ERIC Educational Resources Information Center

    Hochberg, L. Jim, Sr.

    Policies and procedures to promote articulation of associate degree with bachelor degree study are recommended based on the experience of Hawaii Pacific College, Honolulu. Consideration is given to: flexibility versus rigidity, competency versus curriculum specifics, corroboration and substantiation, and contingency versus once-for-all-award. It…

  4. Articulation: Alliances for the Future. Summary of Proceedings (Chicago, Illinois, March 4-6, 1987).

    ERIC Educational Resources Information Center

    American Dental Hygienists' Association, Chicago, IL.

    A summary of proceedings of a conference on articulation by the American Dental Hygienists' Association is presented. Introductions to each paper are made by Cheryl Westphal. Papers are as follows: "Innovate or Rennovate?" (Connie Tussing); "Internal Forces Influencing Innovation" (Arch Lugenbeel); "Regional Linkage Programs" (Steven Jensen);…

  5. Dental Auxiliary Discipline Advisory Group Final Report. Kentucky Allied Health Project.

    ERIC Educational Resources Information Center

    Kentucky Council on Public Higher Education, Frankfort.

    Education for the dental auxiliary professions in Kentucky and articulation within the field are examined, based on the Kentucky Allied Health Project (KAHP), which designed an articulated statewide system to promote entry and exit of personnel at a variety of educational levels. The KAHP model promotes articulation in learning, planning, and…

  6. FCC in Viking articulated boom

    NASA Technical Reports Server (NTRS)

    Hawkins, E. S.

    1972-01-01

    The application requirements and manufacturing techniques for the flat conductor cable used in the Viking Lander Articulated Boom Unit are described. The Viking Boom is a 3-axis device utilized to position a soil sampler and provide digging forces. This application imposed severe restrictions on size, weight, materials, and choice of manufacturing processes. The final cable assembly design resulted in a combination of collated cable and flexible circuits assembled by resistance welding techniques.

  7. The Value of Repetition in Articulation Learning

    ERIC Educational Resources Information Center

    Locke, John L.

    1970-01-01

    Exact analysis of an experiment involving children from the ages of 4 to 12 learning three new articulations revealed that most of the articulation learning took place on the second attempt with relatively moderate improvement in subsequent trials, thus placing the value of repetition in articulation learning in question. (FB)

  8. Stimulus Picture Identification in Articulation Testing

    ERIC Educational Resources Information Center

    Mullen, Patricia A.; Whitehead, Robert L.

    1977-01-01

    Compared with 20 normal speaking and 20 articulation defective Ss (7 and 8 years old) was the percent of correct initial identification of stimulus pictures on the Goldman-Fristoe Test of Articulation with the percent correct identification on the Arizona Articulation Proficiency Scale. (Author/IM)

  9. Articulation in Prader-Willi Syndrome.

    ERIC Educational Resources Information Center

    Defloor, Truus; Van Borsel, John; Curfs, Leopold

    2002-01-01

    This study examined articulation in 13 Dutch individuals (ages 7-29, IQs 38-83) with Prader-Willi syndrome using a picture naming test with transcribed samples subjected to analyses for articulation errors. Results suggest that the impaired articulation found is a function of IQ and that with increasing age, phonological problems gradually resolve…

  10. Influence of Articulating Paper Thickness on Occlusal Contacts Registration: A Preliminary Report.

    PubMed

    Brizuela-Velasco, Aritza; Álvarez-Arenal, Ángel; Ellakuria-Echevarria, Joseba; del Río-Highsmith, Jaime; Santamaría-Arrieta, Gorka; Martín-Blanco, Nerea

    2015-01-01

    The objective of this preliminary study was to determine if the occlusal contact surface registered with an articulating paper during fixed prosthodontic treatment was contained within the area marked on a thicker articulating paper. This information would optimize any necessary occlusal adjustment of a prosthesis' veneering material. A convenience sample of 15 patients who were being treated with an implant-supported fixed singleunit dental prosthesis was selected. Occlusal registrations were obtained from each patient using 12-μm, 40-μm, 80-μm, and 200-μm articulating paper. Photographs of the occlusal registrations were obtained, and pixel measurements of the surfaces were taken and overlapped for comparison. The results showed that the thicker the articulating paper, the larger the occlusal contact area obtained. The differences were statistically significant. In all cases, the occlusal registrations obtained with the thinnest articulating paper were contained within the area marked on the thickest articulating paper. The results suggested that the use of thin articulating papers (12-μm or 40-μm) can avoid unnecessary grinding of veneering material or teeth during occlusal adjustment.

  11. Lunar articulated remote transportation system

    NASA Technical Reports Server (NTRS)

    Beech, Geoffrey; Conley, Gerald; Diaz, Claudine; Dimella, Timothy; Dodson, Pete; Hykin, Jeff; Richards, Byron; Richardson, Kroy; Shetzer, Christie; Vandyke, Melissa

    1990-01-01

    A first generation lunar transportation vehicle was designed for use on the surface of the Moon between the years 2010 and 2020. Attention is focussed on specific design details on all components of the Lunar Articulated Remote Transportation System (Lunar ARTS). The Lunar ARTS will be a three cart, six-wheeled articulated vehicle. It's purpose will be for the transportation of astronauts and/or materials for excavation purposes at a short distance from the base (37.5 kilometers). The power system includes fuel cells for both the primary system and the back-up system. The vehicle has the option of being operated in a manned or unmanned mode. The unmanned mode includes stereo imaging with signal processing for navigation. For manned missions the display console is a digital readout displayed on the inside of the asronaut's helmet. A microprocessor is also on board the vehicle. Other components of the vehicle include: a double wishbone/flexible hemispherical wheel suspension; chassis; a steering system; motors; seat restraints, heat rejection systems; solar flare protection; dust protection; and meteoroid protection. A one-quarter scale dynamic model was built to study the dynamic behavior of the vehicle. The dynamic model closely captures the mechanical and electrical details of the total design.

  12. Lunar articulated remote transportation system

    NASA Technical Reports Server (NTRS)

    1990-01-01

    The students of the Florida A&M/Florida State University College of Engineering continued their design from 1988 to 1989 on a first generation lunar transportation vehicle for use on the surface of the Moon between the years 2010 and 2020. Attention is focused on specific design details on all components of the Lunar Articulated Remote Transportation System (Lunar ARTS). The Lunar ARTS will be a three-cart, six-wheeled articulated vehicle. Its purpose will be the transportation of astronauts and/or materials for excavation purposes at a short distance from the base (37.5 km). The power system includes fuel cells for both the primary system and the back-up system. The vehicle has the option of being operated in a manned or unmanned mode. The unmanned mode includes stereo imaging with signal processing for navigation. For manned missions the display console is a digital readout displayed on the inside of the astronaut's helmet. A microprocessor is also on board the vehicle. Other components of the vehicle include a double wishbone/flexible hemispherical wheel suspension; chassis; a steering system; motors; seat retraints; heat rejection systems; solar flare protection; dust protection; and meteoroid protection. A one-quarter scale dynamic model has been built to study the dynamic behavior of the vehicle. The dynamic model closely captures the mechanical and electrical details of the total design.

  13. The Articulation Committee Companion: A Resource for BC's Articulation Committees. 2007 Edition

    ERIC Educational Resources Information Center

    British Columbia Council on Admissions and Transfer, 2007

    2007-01-01

    British Columbia Council on Admissions and Transfer (BCCAT) has designed "The Articulation Committee Companion" to serve as both an introductory resource for new articulation committee members and as an ongoing reference for committees. The "Companion" includes a brief overview of the province's articulation committees and…

  14. The Articulation Committee Companion: 2011 Edition--A Resource for BC's Articulation Committees

    ERIC Educational Resources Information Center

    Finlay, Finola, Ed.; Orum, Jennifer, Ed.

    2011-01-01

    The Articulation Committee Companion is designed to serve as both an introductory resource for new articulation committee members and as an ongoing reference for committees. The Companion includes a brief overview of the province's articulation committees and their essential role in the post-secondary system. In addition, the Companion outlines…

  15. Report of the Transfer Articulation Task Force.

    ERIC Educational Resources Information Center

    Arizona State Board of Directors for Community Colleges, Phoenix.

    This report to the Arizona State Legislature describes a model transfer system developed by the Transfer Articulation Task Force, a cooperative effort among the state's universities and community colleges to improve articulation and transfer. Following an introduction to the Task Force, elements of the proposed transfer model are reviewed,…

  16. Synthesis of Articulated All-Para Polymers

    DTIC Science & Technology

    1981-10-01

    for the articulated polybenzobisoxazoles was found to decrease with increased content of the diphenoxybenzene structure. The articulated... polybenzobisoxazole structure was shown to be less stable than the analoguus polybe.zobisthiazole structure but much more stable than the articu- lated...have been spun into highly oriented fibers from methanesulfonic acid solutions. Fibers from the latter exhibited exceptionally high modulus and

  17. Towed Articulated Housing For Geophysical Measurements

    NASA Technical Reports Server (NTRS)

    Burke, James D.; Cantrell, James

    1992-01-01

    Snakelike articulated string of rigid shells towed by helicopter, boat, kite or balloon, carries scientific instruments over land and sea surfaces. Nested shells connected to internal chain by bolt covered by preceding cone. String articulates readily to negotiate obstacles, but locally stiff to lie across a narrow crevasse.

  18. 21 CFR 872.3150 - Articulator.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Articulator. 872.3150 Section 872.3150 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... patient's teeth and gums are placed in the device to reproduce the occlusion (bite) and articulation...

  19. Status Report on the Illinois Articulation Initiative.

    ERIC Educational Resources Information Center

    Illinois Community Coll. Board, Springfield.

    The Illinois Articulation Initiative is a comprehensive statewide effort among colleges and universities to enhance the transfer process for students among all sectors of higher education in Illinois. One of the main features of the initiative is the general education core curriculum and a list of statewide articulated general education courses…

  20. 21 CFR 872.3150 - Articulator.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Articulator. 872.3150 Section 872.3150 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... patient's teeth and gums are placed in the device to reproduce the occlusion (bite) and articulation...

  1. 21 CFR 872.3150 - Articulator.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Articulator. 872.3150 Section 872.3150 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... patient's teeth and gums are placed in the device to reproduce the occlusion (bite) and articulation...

  2. Dental Procedures.

    PubMed

    Ramponi, Denise R

    2016-01-01

    Dental problems are a common complaint in emergency departments in the United States. There are a wide variety of dental issues addressed in emergency department visits such as dental caries, loose teeth, dental trauma, gingival infections, and dry socket syndrome. Review of the most common dental blocks and dental procedures will allow the practitioner the opportunity to make the patient more comfortable and reduce the amount of analgesia the patient will need upon discharge. Familiarity with the dental equipment, tooth, and mouth anatomy will help prepare the practitioner for to perform these dental procedures.

  3. Large planar maneuvers for articulated flexible manipulators

    NASA Technical Reports Server (NTRS)

    Huang, Jen-Kuang; Yang, Li-Farn; Juang, Jer-Nan

    1988-01-01

    An articulated flexible manipulator carried on a translational cart is maneuvered by an active controller to perform certain position control tasks. The nonlinear dynamics of the articulated flexible manipulator are derived and a transformation matrix is formulated to localize the nonlinearities in the inertia matrix. Then a feeback linearization scheme is introduced to linearize the dynamic equations for controller design. Through a pole placement technique, a robust controller design is obtained by properly assigning a set of closed-loop desired eigenvalues to meet performance requirements. Numerical simulations for the articulated flexible manipulators are given to demonstrate the feasibility and effectiveness of the proposed position control algorithms.

  4. Large planar maneuvers for articulated flexible manipulators

    NASA Technical Reports Server (NTRS)

    Huang, Jen-Kuang; Yang, Li-Farn

    1988-01-01

    An articulated flexible manipulator carried on a translational cart is maneuvered by an active controller to perform certain position control tasks. The nonlinear dynamics of the articulated flexible manipulator are derived and a transformation matrix is formulated to localize the nonlinearities within the inertia matrix. Then a feedback linearization scheme is introduced to linearize the dynamic equations for controller design. Through a pole placement technique, a robust controller design is obtained by properly assigning a set of closed-loop desired eigenvalues to meet performance requirements. Numerical simulations for the articulated flexible manipulators are given to demonstrate the feasibility and effectiveness of the proposed position control algorithms.

  5. Speech Sound Disorders: Articulation and Phonological Processes

    MedlinePlus

    ... Speech, Language and Swallowing / Disorders and Diseases Speech Sound Disorders: Articulation and Phonological Processes What are speech ... individuals with speech sound disorders ? What are speech sound disorders? Most children make some mistakes as they ...

  6. [The controversy of routine articulator mounting in orthodontics].

    PubMed

    Wang, Li; Han, Xianglong; Bai, Ding

    2013-06-01

    Articulators have been widely used by clinicians of dentistry. But routine articulator mounting is still controversial in orthodontics. Orthodontists oriented by gnathology approve routine articulator mounting while nongnathologic orthodontists disapprove it. This article reviews the thoughts of orthodontist that they agree or disagree with routine articulator mounting based on the considerations of biting, temporomandibular disorder (TMD), periodontitis, and so on.

  7. Transfer and Articulation: Gaining Institutional Support and Developing Regional Relationships.

    ERIC Educational Resources Information Center

    Cipres, Elizabeth L.; Parish, Cynthia L.

    At Mount San Antonio College (MSAC) in Walnut, California, a full-time classified position of Articulation Specialist was created in 1989 to help the college's articulation officer establish the necessary articulation agreements for facilitating the transfer of MSAC students to four-year institutions. In addition, articulation officers from the 13…

  8. Gender Issues and Language Articulation; a Brief Look at Pros of Gender Neutral Language Articulation

    ERIC Educational Resources Information Center

    Ebrahimi, Pouria

    2009-01-01

    As with the language articulated by learners--in both oral and written form--the supremacy of a masculine language use is witnessed. This brings to light the fact that gender has been excessively an unobserved factor in the process of language teaching. Although learners are apparently used to forming masculine-centered articulation, non-sexist…

  9. Articulated Instruction Objectives Guide for Drafting. Final Document for Articulation of Drafting.

    ERIC Educational Resources Information Center

    Henderson, Wm. Edward, Jr.

    Intended for use in competency-based and criterion-referenced vocational programs, this articulated, performance-based instruction objectives guide for Drafting I is designed for reference use in the articulation of drafting programs at the secondary and postsecondary levels. It consists of a description of the development of the guide, 14…

  10. The Articulation Committee Companion: 2009 Edition. A Resource for BC's Articulation Committees

    ERIC Educational Resources Information Center

    Finlay, Finola, Ed.; Orum, Jennifer, Ed.

    2009-01-01

    The British Columbia Council on Admissions and Transfer (BCCAT) has designed The Articulation Committee Companion to serve as both an introductory resource for new members and as an ongoing reference for committees. The Companion includes a brief overview of the province's articulation committees and their essential role in the post-secondary…

  11. Articulation in Business Education for Secondary and Postsecondary Levels. Accounting Articulation Guide.

    ERIC Educational Resources Information Center

    Formby, Ronnie J.

    Focusing on courses in accounting, this guide is one of a set of four articulation guides designed for articulating between secondary and postsecondary business education courses. (The other three guides focus on courses in typewriting, shorthand, and office procedures.) Each guide presents a general course description, outlines of the major units…

  12. Effects of surround articulation on lightness depend on the spatial arrangement of the articulated region

    NASA Astrophysics Data System (ADS)

    Zemach, Iris K.; Rudd, Michael E.

    2007-07-01

    We investigated the effect of surround articulation on the perceived lightness of a target disk. Surround articulation was manipulated by varying either the number of wedges in a surround consisting of wedges of alternating luminance or the number of checks in a surround consisting of a radial checkerboard pattern. In most conditions, increased articulation caused incremental targets to appear lighter and decremental targets to appear darker. But increasing the surround articulation in a way that did not increase the number of target-coaligned edges in the display did not affect the target lightness. We propose that the effects of surround articulation depend on the relationship between the orientations and contrast polarities of the target edges and those of edges present within the surround.

  13. Dental Assistants

    MedlinePlus

    ... help keep the dental office running smoothly. Important Qualities Detail oriented. Dental assistants must follow specific rules and protocols, such as infection control procedures, when helping dentists treat patients. Assistants also ...

  14. Determining a relationship between applied occlusal load and articulating paper mark area.

    PubMed

    Carey, Jason P; Craig, Mark; Kerstein, Robert B; Radke, John

    2007-01-01

    Articulating paper mark size has been widely accepted in the dental community to be descriptive of occlusal load. The objective of this study is to determine if any direct relationship exists between articulating paper mark area and applied occlusal load. A uniaxial testing machine repeatedly applied a compressive load, beginning at 25N and incrementally continuing up to 450N, to a pair of epoxy dental casts with articulating paper interposed. The resultant paper markings (n = 600) were photographed, and analyzed the mark area using a photographic image analysis and sketching program. A two-tailed Student's t-test for unequal variances compared the measured size of the mark area between twelve different teeth (p < 0.05). Graphical interpretation of the data indicated that the mark area increased non-linearly with increasing load. When the data was grouped to compare consistency of the mark area between teeth, a high variability of mark area was observed between different teeth at the same applied load. The Student's t-test found significant differences in the size of the mark area approximately 80% of the time. No direct relationship between paper mark area and applied load could be found, although the trend showed increasing mark area with elevating load. When selecting teeth to adjust, an operator should not assume the size of paper markings, accurately describing the markings' occlusal contact force content.

  15. Determining a Relationship Between Applied Occlusal Load and Articulating Paper Mark Area

    PubMed Central

    Carey, Jason P; Craig, Mark; Kerstein, Robert B; Radke, John

    2007-01-01

    Articulating paper mark size has been widely accepted in the dental community to be descriptive of occlusal load. The objective of this study is to determine if any direct relationship exists between articulating paper mark area and applied occlusal load. A uniaxial testing machine repeatedly applied a compressive load, beginning at 25N and incrementally continuing up to 450N, to a pair of epoxy dental casts with articulating paper interposed. The resultant paper markings (n = 600) were photographed, and analyzed the mark area using a photographic image analysis and sketching program. A two-tailed Student’s t-test for unequal variances compared the measured size of the mark area between twelve different teeth (p < 0.05). Graphical interpretation of the data indicated that the mark area increased non-linearly with increasing load. When the data was grouped to compare consistency of the mark area between teeth, a high variability of mark area was observed between different teeth at the same applied load. The Student’s t-test found significant differences in the size of the mark area approximately 80% of the time. No direct relationship between paper mark area and applied load could be found, although the trend showed increasing mark area with elevating load. When selecting teeth to adjust, an operator should not assume the size of paper markings, accurately describing the markings’ occlusal contact force content. PMID:19088874

  16. Dental OCT

    NASA Astrophysics Data System (ADS)

    Colston, Bill W.; Sathyam, Ujwal S.; Dasilva, Luiz B.; Everett, Matthew J.; Stroeve, Pieter; Otis, L. L.

    1998-09-01

    We present here the first in vivo optical coherence tomography (OCT) images of human dental tissue. A novel dental optical coherence tomography system has been developed. This system incorporates the interferometer sample arm and transverse scanning optics into a handpiece that can be used intraorally to image human dental tissues. The average imaging depth of this system varied from 3 mm in hard tissues to 1.5 mm in soft tissues. We discuss the application of this imaging system for dentistry and illustrate the potential of our dental OCT system for diagnosis of periodontal disease, detection of caries, and evaluation of dental restorations.

  17. Annual Report on Transfer and Articulation, 2008

    ERIC Educational Resources Information Center

    Tennessee Higher Education Commission, 2008

    2008-01-01

    In 2008's Public Chapter 863, the General Assembly directed the Tennessee Higher Education Commission (THEC) to work with the University of Tennessee and the Tennessee Board of Regents to facilitate "universal articulation" of lower division "transfer paths" to baccalaureate majors. This legislation builds on a 2000 Act…

  18. 21 CFR 872.3150 - Articulator.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... mechanical device intended to simulate movements of a patient's upper and lower jaws. Plaster casts of the patient's teeth and gums are placed in the device to reproduce the occlusion (bite) and articulation...

  19. 21 CFR 872.3150 - Articulator.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES... mechanical device intended to simulate movements of a patient's upper and lower jaws. Plaster casts of the patient's teeth and gums are placed in the device to reproduce the occlusion (bite) and articulation...

  20. Stem sarcopterygians have primitive polybasal fin articulation

    PubMed Central

    Zhu, Min; Yu, Xiaobo

    2009-01-01

    Among osteichthyans, basal actinopterygian fishes (e.g. paddlefish and bowfins) have paired fins with three endoskeletal components (pro-, meso- and metapterygia) articulating with polybasal shoulder girdles, while sarcopterygian fishes (lungfish, coelacanths and relatives) have paired fins with one endoskeletal component (metapterygium) articulating with monobasal shoulder girdles. In the fin–limb transition, the origin of the sarcopterygian paired fins triggered new possibilities of fin articulation and movement, and established the proximal segments (stylopod and zeugopod) of the presumptive tetrapod limb. Several authors have stated that the monobasal paired fins in sarcopterygians evolved from a primitive polybasal condition. However, the fossil record has been silent on whether and when the inferred transition took place. Here we describe three-dimensionally preserved shoulder girdles of two stem sarcopterygians (Psarolepis and Achoania) from the Lower Devonian of Yunnan, which demonstrate that stem sarcopterygians have polybasal pectoral fin articulation as in basal actinopterygians. This finding provides a phylogenetic and temporal constraint for studying the origin of the stylopod, which must have originated within the stem sarcopterygian lineage through the loss of the propterygium and mesopterygium. PMID:19324642

  1. Articulation Management for Intelligent Integration of Information

    NASA Technical Reports Server (NTRS)

    Maluf, David A.; Tran, Peter B.; Clancy, Daniel (Technical Monitor)

    2001-01-01

    When combining data from distinct sources, there is a need to share meta-data and other knowledge about various source domains. Due to semantic inconsistencies and heterogeneity of representations, problems arise in combining multiple domains when the domains are merged. The knowledge that is irrelevant to the task of interoperation will be included, making the result unnecessarily complex. This heterogeneity problem can be eliminated by mediating the conflicts and managing the intersections of the domains. For interoperation and intelligent access to heterogeneous information, the focus is on the intersection of the knowledge, since intersection will define the required articulation rules. An algebra over domain has been proposed to use articulation rules to support disciplined manipulation of domain knowledge resources. The objective of a domain algebra is to provide the capability for interrogating many domain knowledge resources, which are largely semantically disjoint. The algebra supports formally the tasks of selecting, combining, extending, specializing, and modifying Components from a diverse set of domains. This paper presents a domain algebra and demonstrates the use of articulation rules to link declarative interfaces for Internet and enterprise applications. In particular, it discusses the articulation implementation as part of a production system capable of operating over the domain described by the IDL (interface description language) of objects registered in multiple CORBA servers.

  2. Articulating Babel: An approach to cultural evolution.

    PubMed

    Wimsatt, William C

    2013-12-01

    After an initial discussion of the character of interdisciplinary linkages between complex disciplines, I consider an area with confluences of many diverse disciplines-the study of cultural evolution. This must embrace not only the traditional biological sciences, but also the multiple often warring disciplines of the human sciences. This interdisciplinary articulation is in its early stages compared, e.g., to that of evolutionary biology or evolutionary developmental biology, and I try to lay out major axes along which its articulation should plausibly occur, given the relevant causal processes acting at different levels. One cannot have an adequate account of cultural evolution without recognizing a central role for cognitive and social development (since culture is cumulatively acquired by individuals through the life-cycle) and the social and cultural organizations and institutions and artifactual tools and infrastructure that support and structure these developmental processes. These induce a population structure that mediates the transmission, expression, and elaboration of culture, and in particular the different ways in which they scaffold learning and the development and articulation of complex skills. I consider how these elements should articulate the disciplines that tend to focus separately on them. Intentions and the market are not explicitly included in this account, and I consider ways in which these perspectives might enter.

  3. Articulation Workshop in Drafting. Final Report.

    ERIC Educational Resources Information Center

    Catonsville Community Coll., MD.

    Drafting students from vocational/technical and high schools frequently repeat the same experiences and courses and work with the same instructional materials when they enroll in college engineering drawing, and architecture programs. In order to minimize needless repetition and address the problem of articulation between such schools and the…

  4. Articulated Multimedia Physics, Lesson 9, Universal Gravitation.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the ninth lesson of the Articulated Multimedia Physics Course, instructional materials relating to universal gravitation are presented in this study guide. The subject is concerned with the quantitative meaning of the law of universal gravitation and its applications in astronomy. The content is arranged in scrambled form, and the use of matrix…

  5. 21 CFR 872.6140 - Articulation paper.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Articulation paper. 872.6140 Section 872.6140 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL... patient's upper and lower teeth when the teeth are in the bite position to locate uneven or high areas....

  6. Articulated Multimedia Physics, Lesson 7, Combining Forces.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the seventh lesson of the Articulated Multimedia Physics Course, instructional materials are presented in this study guide with relation to the force combination. The topics are concerned with the definition and units of forces, sliding forces on inclined planes, and the equilibrant of two or more forces. The content is arranged in scrambled…

  7. Articulation Research 2004: Summary of Results

    ERIC Educational Resources Information Center

    Moyle, Jayne

    2005-01-01

    Most junior syndicate teachers have concerns about the speech clarity of some of the children in their class. It is difficult for teachers to know whether to refer such students for speech assessments by their speech-language therapist. This article outlines a project which gathered New Zealand normative data for a test of articulation. A summary…

  8. Characterization of articulated vehicles using ladar seekers

    NASA Astrophysics Data System (ADS)

    Wellfare, Michael R.; Norris-Zachery, Karen

    1997-08-01

    Many vehicle targets of interest to military automatic target recognition (ATR) possess articulating components: that is, they have components that change position relative to the main body. Many vehicles also have multiple configurations wherein one or more devices or objects may be added to enhance specific military or logistical capabilities. As the expected target set for military ATR becomes more comprehensive, many additional articulations and optional components must be handled. Mobile air defense units often include moving radar antennae as well as turreted guns and missile launchers. Surface-to-surface missile launchers may be encountered with or without missiles, and with the launch rails raised or lowered. Engineers and countermine vehicles have a tremendous number of possible configurations and even conventional battle tanks may very items such as external reactive armor, long- range tanks, turret azimuth, and gun elevation. These changes pose a significant barrier to the target identification process since they greatly increase the range of possible target signatures. When combined with variations already encountered due to target aspect changes, an extremely large number of possible signatures is formed. Conventional algorithms cannot process so many possibilities effectively, so in response, the matching process is often made less selective. This degrades identification performance, increase false alarm rates, and increases data requirements for algorithm testing and training. By explicitly involving articulation in the detection and identification stages of an ATR algorithm, more precise matching constraints can be applied, and better selectivity can be achieve. Additional benefits include the measurement of the position and orientation of articulated components, which often has tactical significance. In this paper, the result of a study investigating the impact of target articulation in ATR for military vehicles are presented. 3D ladar signature

  9. Dental sepsis.

    PubMed

    Mueller, P O; Lowder, M Q

    1998-08-01

    Dental sepsis or periapical abscess formation constitutes a large percentage of dental conditions that afflict horses. Dental sepsis occurs when the pulp chamber of the tooth is exposed to the oral cavity or external environment, allowing bacterial localization with resulting infection. Although acute, primary, septic pulpitis in horses is rare, dental sepsis often results from colonization of the pulp chamber with pathogenic bacteria secondary to maleruption or impaction of teeth with secondary alveolar bone lysis, primary fractures of the tooth, mandible, or maxilla, periodontal disease, or infundibular necrosis. The sequela to pulpal infection are extensions into the periradicular tissues and mandibular or maxillary periapical abscess formation.

  10. The Perceived Effects of State Governance Decentralization on Baccalaureate Articulation

    ERIC Educational Resources Information Center

    Falconetti, Angela M. Garcia

    2009-01-01

    Almost all community colleges provide baccalaureate degree access through the implementation of articulated programs of study called 2 + 2 agreements. Articulation agreements are designed to ensure that associate degree courses apply toward upper-level baccalaureate study. Florida has a long-standing statewide articulation policy that was highly…

  11. Project MAVE - Model for Articulated Vocational Education. Final Report.

    ERIC Educational Resources Information Center

    Vanek, Carol

    Based on the need to strengthen articulation activities within the Illinois educational system, this project was designed to provide a formal articulation mechanism utilizing the concept of institutional coordination for the development of comprehensive vocational programs and services. Phase 1 of the project developed an articulation process…

  12. Handbook of California Articulation Policies and Procedures (2001 Edition).

    ERIC Educational Resources Information Center

    Academic Senate for California Community Colleges, Sacramento.

    This handbook was written in order to assist Articulation Officers and others involved in the articulation process in California institutions of higher education. It is intended to be a guideline and comprehensive resource of articulation policies and practices. In California there are four postsecondary educational segments comprised of: (1) Ten…

  13. Articulation in Schoolchildren and Adults with Neurofibromatosis Type 1

    ERIC Educational Resources Information Center

    Cosyns, Marjan; Mortier, Geert; Janssens, Sandra; Bogaert, Famke; D'Hondt, Stephanie; Van Borsel, John

    2012-01-01

    Several authors mentioned the occurrence of articulation problems in the neurofibromatosis type 1 (NF1) population. However, few studies have undertaken a detailed analysis of the articulation skills of NF1 patients, especially in schoolchildren and adults. Therefore, the aim of the present study was to examine in depth the articulation skills of…

  14. Dental Hygienist.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Center on Education and Training for Employment.

    This document, which is designed for use in developing a tech prep competency profile for the occupation of dental hygienist, lists technical competencies and competency builders for 13 units pertinent to the health technologies cluster in general and 9 units specific to the occupation of dental hygienist. The following skill areas are covered in…

  15. Dental Implants.

    PubMed

    Zohrabian, Vahe M; Sonick, Michael; Hwang, Debby; Abrahams, James J

    2015-10-01

    Dental implants restore function to near normal in partially or completely edentulous patients. A root-form implant is the most frequently used type of dental implant today. The basis for dental implants is osseointegration, in which osteoblasts grow and directly integrate with the surface of titanium posts surgically embedded into the jaw. Radiologic assessment is critical in the preoperative evaluation of the dental implant patient, as the exact height, width, and contour of the alveolar ridge must be determined. Moreover, the precise locations of the maxillary sinuses and mandibular canals, as well as their relationships to the site of implant surgery must be ascertained. As such, radiologists must be familiar with implant design and surgical placement, as well as augmentation procedures utilized in those patients with insufficient bone in the maxilla and mandible to support dental implants.

  16. Power optimal single-axis articulating strategies

    NASA Technical Reports Server (NTRS)

    Kumar, Renjith R.; Heck, Michael L.

    1991-01-01

    Power optimal single axis articulating PV array motion for Space Station Freedom is investigated. The motivation is to eliminate one of the articular joints to reduce Station costs. Optimal (maximum power) Beta tracking is addressed for local vertical local horizontal (LVLH) and non-LVLH attitudes. Effects of intra-array shadowing are also presented. Maximum power availability while Beta tracking is compared to full sun tracking and optimal alpha tracking. The results are quantified in orbital and yearly minimum, maximum, and average values of power availability.

  17. The velic traverse: an independent oral articulator?

    PubMed

    Gick, Bryan; Francis, Naomi; Klenin, Anna; Mizrahi, Ezra; Tom, Denise

    2013-03-01

    Two speech functions have traditionally been ascribed to the velum: opening and closing the velopharyngeal port and providing a passive surface against which the tongue can produce oral constrictions. Contrary to this passive oral function, the present x-ray study finds that a substantial portion of the velum moves to constrict the oropharyngeal isthmus for French uvular /ʁ/. This substructure, designated the velic traverse, functions independently of the parts of the velum used for velopharyngeal port closure, thus acting as an oral articulator. An active velic traverse challenges methods for estimating vocal tract shapes based on tongue posture alone.

  18. Dental OCT

    NASA Astrophysics Data System (ADS)

    Wilder-Smith, Petra; Otis, Linda; Zhang, Jun; Chen, Zhongping

    This chapter describes the applications of OCT for imaging in vivo dental and oral tissue. The oral cavity is a diverse environment that includes oral mucosa, gingival tissues, teeth and their supporting structures. Because OCT can image both hard and soft tissues of the oral cavity at high resolution, it offers the unique capacity to identity dental disease before destructive changes have progressed. OCT images depict clinically important anatomical features such as the location of soft tissue attachments, morphological changes in gingival tissue, tooth decay, enamel thickness and decay, as well as the structural integrity of dental restorations. OCT imaging allows for earlier intervention than is possible with current diagnostic modalities.

  19. Static balancing of planar articulated robots

    NASA Astrophysics Data System (ADS)

    Quaglia, Giuseppe; Yin, Zhe

    2015-12-01

    Static balancing for a manipulator's weight is necessary in terms of energy saving and performance improvement. This paper proposes a method to design balancing devices for articulated robots in industry, based on robotic dynamics. Full design details for the balancing system using springs are presented from two aspects: One is the optimization for the position of the balancing system; the other is the design of the spring parameters. As examples, two feasible balancing devices are proposed, based on different robotic structures: The first solution consists of linkages and springs; the other consists of pulleys, cross mechanisms and (hydro-) pneumatic springs. Then the two solutions are compared. Pneumatic, hydro-pneumatic and mechanical springs are discussed and their parameters are decided according to the requirements of torque compensation. Numerical results show that with the proper design using the methodology presented in this paper, an articulated robot can be statically balanced perfectly in all configurations. This paper therefore provides a design method of the balancing system for other similar structures.

  20. Design of a wheeled articulating land rover

    NASA Technical Reports Server (NTRS)

    Stauffer, Larry; Dilorenzo, Mathew; Yandle, Barbara

    1994-01-01

    The WALRUS is a wheeled articulating land rover that will provide Ames Research Center with a reliable, autonomous vehicle for demonstrating and evaluating advanced technologies. The vehicle is one component of the Ames Research Center's on-going Human Exploration Demonstration Project. Ames Research Center requested a system capable of traversing a broad spectrum of surface types and obstacles. In addition, this vehicle must have an autonomous navigation and control system on board and its own source of power. The resulting design is a rover that articulates in two planes of motion to allow for increased mobility and stability. The rover is driven by six conical shaped aluminum wheels, each with an independent, internally coupled motor. Mounted on the rover are two housings and a removable remote control system. In the housings, the motor controller board, tilt sensor, navigation circuitry, and QED board are mounted. Finally, the rover's motors and electronics are powered by thirty C-cell rechargeable batteries, which are located in the rover wheels and recharged by a specially designed battery charger.

  1. Registered Dental Hygienists as Dental Students.

    ERIC Educational Resources Information Center

    Arnold, Janet; Shugars, Daniel A.

    1985-01-01

    Surveys conducted to (1) investigate why dental hygienists choose to become dentists, (2) evaluate their success in dental school, (3) assess the experience of those who had entered dental school, and (4) gauge the level of interest among dental hygienists in applying to dental school are discussed. (Author/MLW)

  2. Dental sealants

    MedlinePlus

    ... few quick steps. There is no drilling or scraping of the molars. Your dentist will: Clean the ... Dental sealants. Updated October 19, 2016. ADA.org Web site. www.ada.org/en/member-center/oral- ...

  3. Dental Sealants

    MedlinePlus

    ... form does not collect any actual information. External Web Site Policy This graphic notice ( ) means that you are ... the link. Home Contact Us Viewers and Players Site Map FOIA Web Policies Privacy Policy National Institute of Dental and ...

  4. 75 FR 16511 - Pentron Clinical Technologies, a Wholly-Owned Subsidiary of Kerr Dental/Sybron Dental...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-01

    ... such as dental prosthetics, dental composites, dental impressions, dental adhesives, and other dental... prosthetics, dental composites, dental impressions, dental adhesives, and other dental materials to...

  5. Dental Emergencies

    PubMed Central

    Symington, J.M.

    1988-01-01

    Patients with dental emergencies sometimes present to their physician. This article outlines the role of the physician in the management of dental patients who have suffered traumatic injuries, postoperative hemorrhage, pain, and infection. It deals with those difficulties for which the physician may easily prescribe treatment and outlines the treatment that would be undertaken by a dentist who receives such a patient on referral. PMID:21253249

  6. Highly accurate articulated coordinate measuring machine

    DOEpatents

    Bieg, Lothar F.; Jokiel, Jr., Bernhard; Ensz, Mark T.; Watson, Robert D.

    2003-12-30

    Disclosed is a highly accurate articulated coordinate measuring machine, comprising a revolute joint, comprising a circular encoder wheel, having an axis of rotation; a plurality of marks disposed around at least a portion of the circumference of the encoder wheel; bearing means for supporting the encoder wheel, while permitting free rotation of the encoder wheel about the wheel's axis of rotation; and a sensor, rigidly attached to the bearing means, for detecting the motion of at least some of the marks as the encoder wheel rotates; a probe arm, having a proximal end rigidly attached to the encoder wheel, and having a distal end with a probe tip attached thereto; and coordinate processing means, operatively connected to the sensor, for converting the output of the sensor into a set of cylindrical coordinates representing the position of the probe tip relative to a reference cylindrical coordinate system.

  7. Dental Calculus Arrest of Dental Caries

    PubMed Central

    Keyes, Paul H.; Rams, Thomas E.

    2016-01-01

    Background An inverse relationship between dental calculus mineralization and dental caries demineralization on teeth has been noted in some studies. Dental calculus may even form superficial layers over existing dental caries and arrest their progression, but this phenomenon has been only rarely documented and infrequently considered in the field of Cariology. To further assess the occurrence of dental calculus arrest of dental caries, this study evaluated a large number of extracted human teeth for the presence and location of dental caries, dental calculus, and dental plaque biofilms. Materials and methods A total of 1,200 teeth were preserved in 10% buffered formal saline, and viewed while moist by a single experienced examiner using a research stereomicroscope at 15-25× magnification. Representative teeth were sectioned and photographed, and their dental plaque biofilms subjected to gram-stain examination with light microscopy at 100× magnification. Results Dental calculus was observed on 1,140 (95%) of the extracted human teeth, and no dental carious lesions were found underlying dental calculus-covered surfaces on 1,139 of these teeth. However, dental calculus arrest of dental caries was found on one (0.54%) of 187 evaluated teeth that presented with unrestored proximal enamel caries. On the distal surface of a maxillary premolar tooth, dental calculus mineralization filled the outer surface cavitation of an incipient dental caries lesion. The dental calculus-covered carious lesion extended only slightly into enamel, and exhibited a brown pigmentation characteristic of inactive or arrested dental caries. In contrast, the tooth's mesial surface, without a superficial layer of dental calculus, had a large carious lesion going through enamel and deep into dentin. Conclusions These observations further document the potential protective effects of dental calculus mineralization against dental caries. PMID:27446993

  8. Competency-Based Route to Vertical Curriculum Articulation.

    ERIC Educational Resources Information Center

    Burger, Laura; And Others

    What competency-based instruction is and how it can help improve vertical articulation between the curriculum of secondary and postsecondary vocational-technical education programs in Minnesota is the focus of this booklet. Explanation consists of responses to the following questions: (1) What is vertical curriculum articulation? (2) What is…

  9. Articulation Agreements between High Schools, Community Colleges, and Universities.

    ERIC Educational Resources Information Center

    Illinois Community Coll. Board, Springfield.

    Designed to assist college officials in developing and revising articulation agreements, this report describes specific program articulation efforts between Illinois high schools, community colleges, and public and private universities. Data presented were drawn from a survey of 102 public and private community colleges, which resulted in 94…

  10. Influences of Tone on Vowel Articulation in Mandarin Chinese

    ERIC Educational Resources Information Center

    Shaw, Jason A.; Chen, Wei-rong; Proctor, Michael I.; Derrick, Donald

    2016-01-01

    Purpose: Models of speech production often abstract away from shared physiology in pitch control and lingual articulation, positing independent control of tone and vowel units. We assess the validity of this assumption in Mandarin Chinese by evaluating the stability of lingual articulation for vowels across variation in tone. Method:…

  11. Faculty Articulation with Feeder High Schools and Local Employers.

    ERIC Educational Resources Information Center

    Parrott, Marietta

    As a first step in developing an articulation plan with feeder high schools, a College of the Sequoias (COS) task force developed and distributed a survey to all full-time faculty members to determine if individual faculty members were articulating with feeder high schools and local businesses, and if they would be willing to participate in an…

  12. The Oklahoma PN/ADN Articulation Project Report.

    ERIC Educational Resources Information Center

    Oklahoma State Regents for Higher Education, Oklahoma City.

    In response to a critical nursing shortage in the state of Oklahoma, the Oklahoma Practical Nursing (PN)/Associate Degree Nursing (ADN) Articulation Project Coordinating Committee was formed in spring 1990 to develop a proposal for program articulation. A curriculum matrix was designed and adopted for use by five regional subcommittees which…

  13. Perceived Articulation Uniformity between Trumpet and Violin Performances

    ERIC Educational Resources Information Center

    Cooper, Shelly C.; Hamann, Donald L.

    2010-01-01

    Directors strive for a unified sound throughout their wind and orchestra ensembles. Articulation affects sound uniformity among winds and strings. This baseline study examined whether a trumpet player could better match a violin player's articulation, as perceived by participants listening to a recording of two performances, when: (a) performing…

  14. The Dependable Strengths Articulation Process: How It Works.

    ERIC Educational Resources Information Center

    Haldane, Bernard Johnson

    Dependable Strengths Articulation Process (DSAP) is a self-development process designed to facilitate positive self-constructions and improved personal functioning through a systematic intervention that enables participants to recognize, articulate, communicate and use their Dependable Strengths. Because it is a peer-assisted process, each…

  15. Electropalatography in the Treatment of Articulation-Phonological Disorders.

    ERIC Educational Resources Information Center

    Dagenais, Paul A.

    1995-01-01

    Treatment of articulation/phonological disorders with electropalatography (in which speech learners wear a custom-made appliance called a pseudopalate in order to view their tongue-to-palate contacts on a computer monitor) is described. Studies of the treatment's effectiveness with children having articulation or phonological disorders are…

  16. Dental Caries

    PubMed Central

    Burgess, Ralph C.

    1988-01-01

    Dental caries is one of the most prevalent diseases afflicting mankind. It reached a peak in the 1950s but has been declining drastically in recent years in children and young adults. This article describes the three contributing factors in dental caries: microbial plaque, tooth susceptibility, and diet, and discusses practical preventive measures which help to reduce caries incidence. Some of these, such as vaccines and antimicrobial varnishes, are still in the research stages, while others, such as sucrose substitutes, low-calorie sweeteners, and limitation of frequency of sugar snacks are well established and can be promoted by family physicians. PMID:21253193

  17. Analysis of space crane articulated-truss joints

    NASA Technical Reports Server (NTRS)

    Wu, K. C.; Sutter, Thomas R.

    1992-01-01

    The paper examines three articulated-truss joint concepts of the space crane in order to evaluate their static structural performance over a range of geometric design parameters. Emphasis is placed on maintaining the four-longeron reference truss performance across the joint while still allowing large-angle articulation. A maximum positive articulation angle is computed for each joint concept as the design parameters are varied, along with the actuator length ratio required to reach that angle. The tip rotation and lateral deflections of a truss beam with an articulated-truss joint at the midspan are employed to select a point design for each joint concept. The computed deflections for one point design are up to 30 percent higher than deflections for the other two designs. The two lowest natural frequencies of the three point designs are found to be relatively insensitive to large variations in the joint articulation angle.

  18. BIOENERGETIC DIFFERENCES DURING WALKING AND RUNNING IN TRANSFEMORAL AMPUTEE RUNNERS USING ARTICULATING AND NON-ARTICULATING KNEE PROSTHESES

    PubMed Central

    Highsmith, M. Jason; Kahle, Jason T.; Miro, Rebecca M.; Mengelkoch, Larry J.

    2016-01-01

    Transfemoral amputation (TFA) patients require considerably more energy to walk and run than non-amputees. The purpose of this study was to examine potential bioenergetic differences (oxygen uptake (VO2), heart rate (HR), and ratings of perceived exertion (RPE)) for TFA patients utilizing a conventional running prosthesis with an articulating knee mechanism versus a running prosthesis with a non-articulating knee joint. Four trained TFA runners (n = 4) were accommodated to and tested with both conditions. VO2 and HR were significantly lower (p ≤ 0.05) in five of eight fixed walking and running speeds for the prosthesis with an articulating knee mechanism. TFA demonstrated a trend for lower RPE at six of eight walking speeds using the prosthesis with the articulated knee condition. A trend was observed for self-selected walking speed, self-selected running speed, and maximal speed to be faster for TFA subjects using the prosthesis with the articulated knee condition. Finally, all four TFA participants subjectively preferred running with the prosthesis with the articulated knee condition. These findings suggest that, for trained TFA runners, a running prosthesis with an articulating knee prosthesis reduces ambulatory energy costs and enhances subjective perceptive measures compared to using a non-articulating knee prosthesis. PMID:28066524

  19. Consonant recognition and the articulation index

    NASA Astrophysics Data System (ADS)

    Allen, Jont B.

    2005-04-01

    The purpose of this paper is to provide insight into how speech is processed by the auditory system, by quantifying the nature of nonsense speech sound confusions. (1) The Miller and Nicely [J. Acoust. Soc. Am. 27(2), 338-352 (1955)] confusion matrix (CM) data are analyzed by plotting the CM elements Si,j(SNR) as a function of the signal-to-noise ratio (SNR). This allows for the robust clustering of perceptual feature (event) groups, not robustly defined by a single CM table, where clusters depend on the sound order. (2) The SNR is then re-expressed as an articulation index (AI), and used as the independent variable. The normalized log scores log(1-Si,i(AI)) and log(Si,j(AI)), j≠i, then become linear functions of AI, on log-error versus AI plots. This linear dependence may be interpreted as an extension of the band-independence model of Fletcher. (3) The model formula for the average score for the finite-alphabet case Pc(AI,H)=∑i=1NSi,i/N is then modified to include the effect of entropy H. Due to the grouping of sounds with increased SNR (and AI), the sound-group entropy Hg plays a key role in this performance measure. (4) A parametric model for the confusions Si,j(AI,Hg) is then described, which characterizes the confusions between competing sounds within a group. .

  20. Vocal Tract Articulation in Zebra Finches

    PubMed Central

    Ohms, Verena R.; Snelderwaard, Peter Ch.; ten Cate, Carel; Beckers, Gabriël J. L.

    2010-01-01

    Background Birdsong and human vocal communication are both complex behaviours which show striking similarities mainly thought to be present in the area of development and learning. Recent studies, however, suggest that there are also parallels in vocal production mechanisms. While it has been long thought that vocal tract filtering, as it occurs in human speech, only plays a minor role in birdsong there is an increasing number of studies indicating the presence of sound filtering mechanisms in bird vocalizations as well. Methodology/Principal Findings Correlating high-speed X-ray cinematographic imaging of singing zebra finches (Taeniopygia guttata) to song structures we identified beak gape and the expansion of the oropharyngeal-esophageal cavity (OEC) as potential articulators. We subsequently manipulated both structures in an experiment in which we played sound through the vocal tract of dead birds. Comparing acoustic input with acoustic output showed that OEC expansion causes an energy shift towards lower frequencies and an amplitude increase whereas a wide beak gape emphasizes frequencies around 5 kilohertz and above. Conclusion These findings confirm that birds can modulate their song by using vocal tract filtering and demonstrate how OEC and beak gape contribute to this modulation. PMID:20689831

  1. Nasal reconstruction with articulated irradiated rib cartilage

    SciTech Connect

    Murakami, C.S.; Cook, T.A.; Guida, R.A. )

    1991-03-01

    Nasal structural reconstruction is a formidable task in cases where there is loss of support to both the nasal dorsum and tip. A multitude of surgical approaches and materials have been used for the correction of the saddle-nose deformity with varying degrees of success. Articulated irradiated rib cartilage inserted through an external rhinoplasty approach was used to reconstruct nasal deformities in 18 patients over a 6-year period. Simultaneous use of a midline forehead flap to reconstruct the overlying soft tissue was required in four cases. Follow-up ranged from 1 to 6 years (mean, 2.8 years). Results were rewarding in most cases with marked improvement in nasal support and airway. Revision and/or replacement secondary to trauma or warping of the graft was required in four cases. None of the patients exhibited infection, extrusion, or noticeable resorption. A description of the surgical technique, review of all the cases, and recommendation for continued use of this graft material are discussed.

  2. Articulation handicap index: an instrument for quantifying psychosocial consequences of impaired articulation.

    PubMed

    Keilmann, Annerose; Konerding, Uwe; Oberherr, Constantin; Nawka, Tadeus

    2016-12-01

    Structural, neurological and muscular diseases can lead to impairments of articulation. These impairments can severely impact social life. To judge health status comprehensively, this impact must be adequately quantified. For this purpose, the articulation handicap index (AHI) has been developed. Psychometric analyses referring to this index are presented here. The AHI was completed by 113 patients who had undergone treatment of tumours of the head or neck. The patients also gave a general self-assessment of their impairments due to articulation problems. Furthermore, tumour size, tumour location and kind of therapy were recorded. Missing data were analysed and replaced by multiple imputation. Internal structure was investigated using principal component analysis (PCA); reliability using Cronbach's alpha. Validity was investigated by analysing the relationship between AHI and general self-assessment of impairments. Moreover, the relationships with tumour size, tumour location and kind of therapy were analysed. Only 0.12 % of the answers to the AHI were missing. The Scree test performed with the PCA results suggested one-dimensionality with the first component explaining 49.6 % of the item variance. Cronbach's alpha was 0.96. Kendall's tau between the AHI sum score and the general self-assessment was 0.69. The intervals of AHI sum scores for the self-assessment categories were determined with 0-13 for no, 14-44 for mild, 46-76 for moderate, and 77-120 for severe impairment. The AHI sum score did not systematically relate to tumour size, tumour location or kind of therapy. The results are evidence for high acceptance, reliability and validity.

  3. Finding Dental Care

    MedlinePlus

    ... Finding Dental Care Where can I find low-cost dental care? Dental schools often have clinics that allow dental ... can I find more information? See Finding Low Cost Dental Care . ​​​​ WWNRightboxRadEditor2 Contact Us 1-866-232-4528 nidcrinfo@ ...

  4. Gust Mitigation of Micro Air Vehicles Using Passive Articulated Wings

    PubMed Central

    Slegers, Nathan

    2014-01-01

    Birds and insects naturally use passive flexing of their wings to augment their stability in uncertain aerodynamic environments. In a similar manner, micro air vehicle designers have been investigating using wing articulation to take advantage of this phenomenon. The result is a class of articulated micro air vehicles where artificial passive joints are designed into the lifting surfaces. In order to analyze how passive articulation affects performance of micro air vehicles in gusty environments, an efficient 8 degree-of-freedom model is developed. Experimental validation of the proposed mathematical model was accomplished using flight test data of an articulated micro air vehicle obtained from a high resolution indoor tracking facility. Analytical investigation of the gust alleviation properties of the articulated micro air vehicle model was carried out using simulations with varying crosswind gust magnitudes. Simulations show that passive articulation in micro air vehicles can increase their robustness to gusts within a range of joint compliance. It is also shown that if articulation joints are made too compliant that gust mitigation performance is degraded when compared to a rigid system. PMID:24516368

  5. A USPL functional system with articulated mirror arm for in-vivo applications in dentistry

    NASA Astrophysics Data System (ADS)

    Schelle, Florian; Meister, Jörg; Dehn, Claudia; Oehme, Bernd; Bourauel, Christoph; Frentzen, Mathias

    Ultra-short pulsed laser (USPL) systems for dental application have overcome many of their initial disadvantages. However, a problem that has not yet been addressed and solved is the beam delivery into the oral cavity. The functional system that is introduced in this study includes an articulated mirror arm, a scanning system as well as a handpiece, allowing for freehand preparations with ultra-short laser pulses. As laser source an Nd:YVO4 laser is employed, emitting pulses with a duration of tp < 10 ps at a repetition rate of up to 500 kHz. The centre wavelength is at 1064 nm and the average output power can be tuned up to 9 W. The delivery system consists of an articulated mirror arm, to which a scanning system and a custom made handpiece are connected, including a 75 mm focussing lens. The whole functional system is compact in size and moveable. General characteristics like optical losses and ablation rate are determined and compared to results employing a fixed setup on an optical table. Furthermore classical treatment procedures like cavity preparation are being demonstrated on mammoth ivory. This study indicates that freehand preparation employing an USPL system is possible but challenging, and accompanied by a variety of side-effects. The ablation rate with fixed handpiece is about 10 mm3/min. Factors like defocussing and blinding affect treatment efficiency. Laser sources with higher average output powers might be needed in order to reach sufficient preparation speeds.

  6. Dental education and dental practice.

    PubMed Central

    Moore, J R

    1984-01-01

    This paper relates recent modes of dental practice to changes that the public and government are likely to ask the health care professions to make in the future. As usual they are asking for the best of all worlds. First, that we maintain the clinical model to the highest standards of personal dental care based and tested against the best research at our disposal, whilst we ensure there is no reduction in the high technical standards for which british dentists have a reputation. Second, that the profession is required to consider ways of providing care on the medicosocial model for the whole community at an economic level the country will afford. The broad changes in dental education have been reviewed, from the technical apprenticeship to the establishment of strong university departments in teaching hospitals. The importance of a sound biomedical foundation and of research both to education and the credibility of dental practice as a primary health care profession is stressed if the profession is to retain its position as a sister to medicine and not slide down to that of a technical ancillary. PMID:6374141

  7. The Modified Semidirect Onlay Technique With Articulated Elastic Model.

    PubMed

    Papazoglou, Efstratios; Diamantopoulou, Sofia

    2015-12-01

    The modified semidirect onlay technique with articulated elastic model involves the fabrication of a stone model that is quickly mounted on an articulator and it includes an elastic part that enables the fabrication of a restoration with proper occlusal anatomy. The technique overcomes the disadvantages of the direct technique such as polymerization shrinkage stress and difficulty in achieving proper contours and, compared to the indirect technique, treatment is completed in a single appointment, without laboratory cost. The novelty of the technique is that, since the restoration is fabricated on an articulated model it eliminates time for occlusal adjustments.

  8. Dental Implant Surgery

    MedlinePlus

    Dental implant surgery Overview By Mayo Clinic Staff Dental implant surgery is a procedure that replaces tooth roots with ... look and function much like real ones. Dental implant surgery can offer a welcome alternative to dentures ...

  9. Dental Holography

    NASA Astrophysics Data System (ADS)

    Dirtoft, Ingegerd

    1983-12-01

    Ten years have passed since the first articles appeared in this new field. The qualities of the laser light together with the need of contactless 3-D measurements for different dental purposes seemed to be extremely promising, but still just a few scientists have used the method and mostly for laboratory studies. For some reason there has been a preponderance for orthodontic measurements. This seems to be a bit peculiar from holographic view compared with measurements for engineering purposes, which usually are made on metals. So naturally holography can become a clinical tool for measurements in the field of fixed bridges, removable partial dentures and implants. One of the problems is that the need for holography in dental research must be fulfilled in collaboration with physicists. Only a two-way communication during an entire experiment can balance both technical and odontological demands and thus give practical and clinical important results. The need for an easy way of handling the evaluation to get all required information is another problem and of course the holographic equipment must be converted to a box easy to handle for everyone. At last the position of dental holography today is going to be carefully examined together with an attempt to look into the hopefully exciting and not to utopic future for this research field.

  10. Generalizing articulation training with trainable mentally retarded subjects.

    PubMed Central

    Murdock, J Y; Garcia, E E; Hardman, M L

    1977-01-01

    A multiple-baseline technique was used to evaluate generalization effects during articulation training with trainable mentally retarded subjects. Four target words were selected for each subject on the basis of whether the subject could articulate the word correctly when it was modelled but could not articulate the word correctly in response to a picture of it. Five different settings were selected for generalization probing and training for each subject. In Setting 1, Experimenter 1 initiated training sequentially on all four target words for each subject. Other experimenters probed for correct articulation generalization in four other settings. Training was initiated in these four other settings sequentially only if correct responding failed to generalize to a setting. Results indicated that it was necessary to initiate training on at least three of the four selected target words in at least one additional setting with an additional trainer before correct responding generalized to untrained settings. PMID:599115

  11. King County Metro Transit Hybrid Articulated Buses: Final Evaluation Results

    SciTech Connect

    Chandler, K.; Walkowicz, K.

    2006-12-01

    Final technical report compares and evaluates new diesel and diesel hybrid-electric articulated buses operated as part of the King County Metro Transit (KC Metro) fleet in Seattle, Washington. The evaluation lasted 12 months.

  12. Molecular Articulation in Response to Interactive Atomic Forces in Docker

    DTIC Science & Technology

    1996-12-01

    MOLECULAR ARTICULATION IN RESPONSE TO INTERACTIVE ATOMIC FORCES IN DOCKER THESIS Todd R. Kellett, Captain, USAF < AFIT/GCS/ENG/96D- 15 IDb~tzkac Unkg...ARTICULATION IN RESPONSE TO INTERACTIVE ATOMIC FORCES IN DOCKER THESIS Todd R. Kellett, Captain, USAF AFIT/GCS/ENG/96D- 15 Approved for public...INTERACTIVE ATOMIC FORCES IN DOCKER THESIS Presented to the Faculty of the Graduate School of Engineering of the Air Force Institute of Technology Air

  13. Second-generation dental laser technology

    NASA Astrophysics Data System (ADS)

    Moretti, Michael

    1993-07-01

    The first generation of dental lasers proved limited to soft tissue applications. Due to the thermal properties of these lasers, drilling of enamel and dentin is harmful to the underlying nerve tissue. As a solution to this problem, more sophisticated solidstate lasers are under commercial development for hard tissue applications. The first of these second generation lasers to emerge is the erbium:YAG now marketed in Europe by KaVo. This system relies on a cumbersome articulated arm delivery device. Other manufacturers have overcome this delivery problem with the introduction of flexible delivery methods. Another hard tissue laser that has been introduced is the short-pulsed Nd:YAG. This laser uses shaped pulses to drill teeth without thermal damage. An overview of these and other second generation dental lasers is presented.

  14. Dental implants in patients with bruxing habits.

    PubMed

    Lobbezoo, F; Brouwers, J E I G; Cune, M S; Naeije, M

    2006-02-01

    Bruxism (teeth grinding and clenching) is generally considered a contraindication for dental implants, although the evidence for this is usually based on clinical experience only. So far, studies to the possible cause-and-effect relationship between bruxism and implant failure do not yield consistent and specific outcomes. This is partly because of the large variation in the literature in terms of both the technical aspects and the biological aspects of the study material. Although there is still no proof for the suggestion that bruxism causes an overload of dental implants and of their suprastructures, a careful approach is recommended. There are a few practical guidelines as to minimize the chance of implant failure. Besides the recommendation to reduce or eliminate bruxism itself, these guidelines concern the number and dimensions of the implants, the design of the occlusion and articulation patterns, and the protection of the final result with a hard occlusal stabilization splint (night guard).

  15. Articulation and acoustics of Kannada affricates: A case of geminate /ʧ/.

    PubMed

    Kochetov, Alexei; Sreedevi, N

    2016-01-01

    Affricates have been observed to be problematic in phonological acquisition and disordered speech across languages, due to their relatively complex spatial and temporal articulatory patterns. Remediation of difficulties in the production of affricates requires understanding of how these sounds are typically produced. This study presents the first systematic articulatory and acoustic investigation of voiceless geminate affricate /ʧ/ in Kannada (a Dravidian language), compared to the palatal glide and the voiceless dental stop. Ultrasound data from 10 normal speakers from Mysore, India revealed that /ʧ/ is produced with the tongue shape intermediate between the palatal glide and the dental stop, and with the laminal constriction at the alveolar ridge. The observed articulatory differences are reflected in acoustic formant patterns of vowel transitions and stop/affricate bursts. Altogether, the results show that the Kannada consonant in question is an alveolopalatal affricate, supporting some of the previous descriptive phonetic accounts of the language and raising questions for further research on normal and disordered speech. The results and our survey of literature also suggest that affricates in South Asian languages tend to be phonetically variable and historically unstable compared to other consonant articulations.

  16. Design and wear testing of a temporomandibular joint prosthesis articulation.

    PubMed

    van Loon, J P; Verkerke, G J; de Vries, M P; de Bont, L G

    2000-02-01

    As part of the development of a total temporomandibular joint prosthesis, a prosthesis articulation was designed. The articulation consists of a spherical head (ball) of the mandibular part, rotating against an enveloping ultra-high-molecular-weight polyethylene (UHMWPE) disc with a flat cranial side, which slides along the opposing skull part. The aim of this study was to determine the in vitro wear rate of the articulation, and to predict the in vivo wear rate from the results. Based on a disc thickness of 5 mm and a ball diameter of 8 mm, the stresses within the disc were calculated by means of a finite element computer model. The wear rate of the ball-disc articulation was determined by in vitro wear tests, with a stainless-steel ball rotating against a UHMWPE disc in a serum-based lubricant. Eight discs were tested for seven million cycles each. The in vitro wear rate of the disc-skull part articulation was calculated from the test results of the ball-disc articulation. The maximum Von Mises' stress was less than the yield strength of UHMWPE and, therefore, was sufficiently low. The in vitro wear rate of the ball-disc articulation was 0.47 mm3 per million cycles. The in vivo expected total wear rate is 0.65 mm3 per year, corresponding with a yearly decrease of disc thickness of 0.0094 mm. Although it is difficult to judge whether this wear rate is sufficiently low, because the influence of UHMWPE wear particles in the TMJ region is unknown, both the expected wear rate and the decrease of thickness appear to be acceptable.

  17. The acoustic correlates of secondary articulation in Abkhaz

    NASA Astrophysics Data System (ADS)

    Crouch, Caroline Quigley

    The purpose of this study is to investigate the acoustic correlates of secondary articulation in the Abzhywa dialect of Abkhaz. Data for this study were collected in Sukhum in September of 2014 from four speakers of Abzhywa Abkhaz, two male and two female. Each speaker read a list of 144 words three times, resulting in a total of 1728 words. From these data 151 tokens of word-initial voiceless fricatives were selected for comparison. Tokens belong to one of eight types: retroflex, plain palato-alveolar, labialized palto-alveolar, plain uvular, labialized uvular, palatalized uvular, plain pharyngeal, or labialized pharyngeal. Each token was measured for duration, average intensity, and center of gravity in Praat. Using the 'hclust' clustering function in R, tokens from all eight types were clustered based on the three acoustic measures. Then, fricatives with shared primary places of articulation but different secondary articulations were compared along each of the three acoustic measures. The 'k-means' clustering function was used to cluster tokens sharing a primary place of articulation based on two of the three acoustic measures determined by the function to be the best predictors of token type. This study found that the three acoustic measures used were not sufficient to distinguish the fricatives across places of articulation. For fricatives sharing a primary place of articulation, center of gravity and duration were selected by k-means as the two most relevant components in all three cases. However, the clustering in all cases was not homogenous, indication that further acoustic features are necessary for accurately distinguishing fricatives that share a primary but not a secondary place of articulation.

  18. Child Indicators: Dental Health.

    ERIC Educational Resources Information Center

    Lewit, Eugene M.; Kerrebrock, Nancy

    1998-01-01

    Reviews measures of dental health in children and the evidence on child dental health. Although children's dental health has improved over the past two decades, many poor children do not receive necessary dental health services, and reasons for this failure are summarized. (SLD)

  19. Weaker dental enamel explains dental decay.

    PubMed

    Vieira, Alexandre R; Gibson, Carolyn W; Deeley, Kathleen; Xue, Hui; Li, Yong

    2015-01-01

    Dental caries continues to be the most prevalent bacteria-mediated non-contagious disease of humankind. Dental professionals assert the disease can be explained by poor oral hygiene and a diet rich in sugars but this does not account for caries free individuals exposed to the same risk factors. In order to test the hypothesis that amount of amelogenin during enamel development can influence caries susceptibility, we generated multiple strains of mice with varying levels of available amelogenin during dental development. Mechanical tests showed that dental enamel developed with less amelogenin is "weaker" while the dental enamel of animals over-expressing amelogenin appears to be more resistant to acid dissolution.

  20. Dental education in Colombia

    PubMed Central

    Jaramillo, Jorge A.; Pulido, Jairo H. Ternera; Núñez, Jaime A. Castro; Bird, William F.; Komabayashi, Takashi

    2014-01-01

    This article describes Colombia's development of formal dentistry, its dental school system, curriculum, and dental licensure, and current issues in oral health care. In 1969, there were only 4 dental schools in Colombia; at this writing there are 21. Five dental schools are public and the other 16 are private. Nearly all classes are conducted in Spanish. Undergraduate pre-dental coursework is not a prerequisite for dental school in Colombia. To obtain licensure, Colombian dental students must complete 5 years of study in dental school, earn a diploma, and work for the government for 1 year. There are approximately 41,400 dentists in Colombia, and the number is increasing quickly. However, the unemployment rate among dentists is very high, even though graduation from dental school is extremely difficult. Although the 1,100:1 ratio of citizens to dentists is considered satisfactory, access to dental care is limited due to the high rate of poverty. PMID:20339245

  1. A newer technique to program a semi adjustable articulator

    PubMed Central

    Venkateshwaran, R.; Karthigeyan, Suma; Manoharan, P. S.; Konchada, Jagadish; Ramaswamy, Manikandan; Bhuminathan

    2014-01-01

    Introduction: The difficulty in reproducing accurate angle of condylar guidance in semi-adjustable articulators. Purpose: The purpose of this study was to determine the correlation between the angle of horizontal condylar inclination obtained on a semi-adjustable articulator and the corresponding angle traced on a temporomandibular joint (TMJ) radiograph in completely edentulous subject. Materials and Methods: The horizontal condylar inclination angle was obtained in a semi-adjustable articulator by means of height tracer (extra oral tracing device) and interocclusal records to program the articulator in 21 subjects. TMJ radiograph were recorded by the same operator with same orthopantomogram (OPG) machine (planmeca). Tracings of inclines of articular eminence on the radiograph were compared with the angle obtained on a semi-adjustable articulator. Each measurement was made using manual methods of measuring angle. The results were subjected to the Pearson correlation statistical analysis (α =0.01). Results: The outline of the articular eminence in a TMJ tomogram radiographic image was identified and traced. A significant correlation was found between the horizontal condylar inclination on a semi-adjustable and the corresponding TMJ tomogram radiographic image for both right (R = 0.789; P = 0.001) and left (i = 0.747; P = 0.004) sides. Conclusion: The articular eminence traced on a TMJ tomogram image represents the horizontal condylar inclination with a mean difference of 5° in 21 subjects evaluated. PMID:25210356

  2. Identification of articulation error patterns using a novel dependence network.

    PubMed

    Chen, Yeou-Jiunn

    2011-11-01

    Articulation errors seriously reduce speech intelligibility and the ease of spoken communication. Speech-language pathologists manually identify articulation error patterns based on their clinical experience, which is a time-consuming and expensive process. This study proposes an automatic pronunciation error identification system that uses a novel dependence network (DN) approach. In order to derive a subject's articulatory information, a photo naming task is performed to obtain the subject's speech patterns. Based on clinical knowledge about speech evaluation, a DN scheme was used to model the relationships of a test word, a subject, a speech pattern, and an articulation error pattern. To integrate DN into automatic speech recognition (ASR), a pronunciation confusion network is proposed to model the probability of DN and is then used to guide the search space of the ASR. Further, to increase the accuracy of the ASR, an appropriate threshold based on a histogram of pronunciation errors is selected in order to disregard rare pronunciation errors. Finally, the articulation error patterns were well identified by integrating the likelihoods of the DNs of each phoneme. The results of this study indicate that it is feasible to clinically implement this dynamic network approach to achieve satisfactory performance in articulation evaluation.

  3. Chaotic Dynamics of Articulated Cylinders in Confined Axial Flow

    NASA Astrophysics Data System (ADS)

    Païdoussis, M. P.; Botez, R. M.

    1993-10-01

    A study is presented of the dynamics of an articulated system of cylinders in confined axial flow. The Articulated system is composed of rigid cylindrical segments, interconnected by rotational springs; it is cantilevered, hanging vertically in the centre of a cylindrical pipe, with fluid flowing downwards in the narrow annular passage. For sufficiently high flow velocity, the system generally loses stability sequentially by diverge (pitchfork bifurcation) and flutter (Hopf bifurcation). Once this occurs, the articulated system interacts with the outer pipe, which acts a constraint to free motions. In the present study, which is mainly concerned with possible chaotic motions in this system, the analytical model is highly simplified. Thus, motions are considered to be planar, and the equations of the articulated system are taken to be linear, other than the terms associated with interaction with the outer pipe, which is modelled by either a trilinear or a cubic spring. A linear eigenvalue analysis is first undertaken, and then the nonlinear behaviour of the constrained model is explored numerically for systems of two and three articulations. Phase-plane plots, power spectral densities and bifurcation diagrams indicate in some cases a clear period-doubling cascade leading to chaos, while in others chaos arises via the quasiperiodic route. Poincaré maps and Lyapunov exponent calculations confirm the existence of chaos. Some analytical work is also presented, involving centre manifold theory, in which the post-Hopf limit-cycle amplitude is calculated and compared with that obtained numerically.

  4. Atypical Forensic Dental Identifications.

    PubMed

    Cardoza, Anthony R; Wood, James D

    2015-06-01

    Forensic dental identification specialists are typically the last conventional option for postmortem identification. Forensic dental identification is most often accomplished by comparing radiographs of the decedent's teeth with the dental radiographs obtained from the dentist of the suspected victim. Unfortunately, antemortem dental radiographs are not always available. When presented with this challenge, the authors of this article have been successful in completing identifications using means other than dental radiographic comparison.

  5. Activation of right insular cortex during imaginary speech articulation.

    PubMed

    Kato, Yutaka; Muramatsu, Taro; Kato, Motoichiro; Shintani, Masuro; Kashima, Haruo

    2007-03-26

    Human speech articulation is a complex process controlled by a form of 'programming' implemented in the brain. Analysis of speech articulation using neuroimaging techniques is difficult, however, because motor noise is time-locked to the articulatory events. The current magnetoencephalography study, in which 12 participants were required to imagine vocalizing a phonogram after a visual cue, was designed to visualize the prearticulatory 'automatic' processes corresponding to the motor initiation. Magnetic activity correlating with the preparation for articulation occurred in the insular cortices at about 160 ms after the visual cue, and had a relative dominance in the right hemisphere. This suggests that motor control of speech proceeds from the insular regions, although the 'automatic' nature of our task might have led to the observed right-sided dominance.

  6. Design of a singularity-free articulated arm subassembly

    SciTech Connect

    Remis, S.J.; Stanisic, M.M. . Aerospace and Mechanical Engineering Dept.)

    1993-12-01

    Adding a redundant degree of freedom to the shoulder pointing system complex of an articulated arm subassembly makes it possible to achieve a maximal workspace that is free of singularities. This paper derives a functional constraint between three of the four joints of this new type of arm, achieving a singularity-free workspace encompassing the entire reachable volume between the maximal- and minimal-reach surfaces. The large volume of dexterous workspace is verified by animation of the resulting arm design. Graphical results from the animation are presented comparing the dexterous workspace of this new arm to that of the standard nonredundant articulated arm subassembly such as found in the Puma manipulator.

  7. Language, articulation, voice and resonance characteristics in 4 children with Goldenhar syndrome: a pilot study.

    PubMed

    Van Lierde, Kristiane M; Van Cauwenberge, Paul; Stevens, Ines; Dhooge, Ingeborg

    2004-01-01

    The purpose of this study was to describe the language, articulation, voice and resonance characteristics in children with Goldenhar syndrome. The 4 Dutch-speaking subjects were 2 boys (age 4.5 and 10.2 years) and 2 girls (aged 5.0 and 5.4 years) with normal cognitive functioning. Language testing showed a delay in the development of morphosyntactic abilities. Speech analysis showed that these four children were capable of producing all the sounds of their mother tongue. One type of distortion error, namely dentalization, was found in 2 children. Phonological process analysis revealed the persistence of processes such as final consonant deletion, unstressed syllable deletion and cluster reduction, which are normal in young children but are suppressed with maturation. Also the substitution process of devoicing was observed in these 4 children. It is not clear how the speech and language problems demonstrated in these 4 children are to be explained. It must be taken into consideration that the Goldenhar syndrome has a variable expression. It is possible that the presence of a mandibular defect, hearing impairment, the type and severity of palatal abnormality and decreased linguistic processing skills influence articulation in an individual child. The voices of 2 children were characterized by the presence of slight roughness, corresponding with a higher jitter percentage. How the occurrence of the hoarse voices is to be explained is not quite clear. Laryngoscopic evaluation of the vocal folds showed no organic or functional voice disorder. Regarding resonance, only the child with a cleft palate showed hypernasality and nasal emission. The ENT specialist and the speech-language pathologist must be aware of these communication disorders in order to start preventive and early 'tailor-made' speech and language intervention as soon as possible.

  8. Frida Kahlo: Visual Articulations of Suffering and Loss.

    ERIC Educational Resources Information Center

    Nixon, Lois LaCivita

    1996-01-01

    Illustrates the value of interdisciplinary approaches to patient care by exploring visual articulations of suffering as rendered by one artist. Makes general observations about the nature of humanities courses offered to medical students and depicts a visual portrayal of an illness story representing personal perspectives about patient suffering…

  9. Articulating Domestic and Global University Descriptors and Indices of Excellence

    ERIC Educational Resources Information Center

    Lindsay, Beverly

    2012-01-01

    At the 2010 American Educational Research Association (AERA) annual conference, a featured invited session focused on "How professors think: inside the curious world of academic judgment." Harvard University professor and author, Michele Lamont, articulated a thoughtful precis of her book. Her material concentrates on the "curious" world of…

  10. Articulation effects in lightness: historical background and theoretical implications.

    PubMed

    Gilchrist, Alan L; Annan, Vidal

    2002-01-01

    The concept of articulation was first introduced by Katz [1935 The World of Colour (London: Kegan Paul, Trench, Trubner & Co)] to refer to the degree of complexity within a field. Katz, who created the basic research methods for studying lightness constancy, found that the greater the degree of articulation within a field of illumination, the greater the degree of constancy. Even though this concept has been largely forgotten, there is much empirical evidence for Katz's principle, and the effects on lightness are very strong. However, when articulation is increased within a framework that does not coincide with a region of illumination, constancy is weakened. Kardos (1934 Zeitschrift für Psychologie Ergänzungband 23) advanced the concept of co-determination, according to which the lightness of a surface is determined relative to more than one field of illumination. Gilchrist et al (1999 Psychological Review 106 795-834) argue that the fields concept should be replaced by the more operational frameworks concept and that a wide variety of lightness errors can be explained by a modification of the Katz principle: the greater the articulation within a perceptual framework, the stronger the anchoring of lightness values within that framework.

  11. Articulating and Contextualizing Multiple Literacies in an Urban Setting

    ERIC Educational Resources Information Center

    Voithofer, Rick; Winterwood, Fawn

    2010-01-01

    This study uses articulation theory to frame how social actors and institutions in an urban community in Columbus, Ohio, form linkages and understandings about computer and information literacies. Using interviews with 33 key educators (e.g., principals, computer literacy teachers, library media specialists, district integration specialists),…

  12. Student Assessment System. Admissions Guide. Georgia Vocational Education Program Articulation.

    ERIC Educational Resources Information Center

    Scott, Paul; And Others

    Designed for use by student personnel workers in Georgia's postsecondary vocational schools, this guide describes the recommended activities, standards, and procedures that can be used to grant advanced placement to entering students. It begins with brief overview of articulation. The next section describes the Student Assessment System, steps in…

  13. Incorporation of Active Elements into the Articulated Total Body Model.

    DTIC Science & Technology

    1985-06-30

    the elbow , shoulder, hip and knee joints, 20. OISTRIBUTION/AVAILABILITY OF ABSTRACT 21. ABSTRACT SECURITY CLASSIFICATION UNCLASSIFIED/UNLIMITED X SAME...Active Elements into the Articulated Total Body Model Block 19 continued. Several validation studies were performed. One simulated elbow flexion with...29 V. PHASE III- MODELLING THE GENERAL MUSCULATURE .... ........ ... 31 """. iii A. Elbow Joint

  14. Articulation for Allied Health. Final Report. Omnibus Dissemination Project.

    ERIC Educational Resources Information Center

    Havens, Cheryl C.

    There exists in health occupations education, two types of educational institutions. One type prepares students for a certificate, and the other for a degree. The objective of the Articulation Project for Allied Health was to establish and document a procedure by which students with technical certificates could receive college credit, recommending…

  15. Active cells for redundant and configurable articulated structures

    NASA Astrophysics Data System (ADS)

    Swensen, John P.; Nawroj, Ahsan I.; Pounds, Paul E. I.; Dollar, Aaron M.

    2014-10-01

    The proposed research effort explores the development of active cells—simple contractile electro-mechanical units that can be used as the material basis for larger articulable structures. Each cell, which might be considered a ‘muscle unit,’ consists of a contractile Nitinol Shape Memory Alloy (SMA) core with conductive terminals. Large numbers of these cells might be combined and externally powered to change phase, contracting to either articulate with a large strain or increase the stiffness of the ensemble, depending on the cell design. Unlike traditional work in modular robotics, the approach presented here focuses on cells that have a simplistic design and function, are inexpensive to fabricate, and are eventually scalable to sub-millimeter sizes, working toward our vision of articulated and robotic structures that can be custom-fabricated from large numbers of general cell units, similar to biological structures. In this paper, we present the design of the active cells and demonstrate their usage with three articulated structures built with them.

  16. Forest Technician. 2+2 Articulated Curriculum in Agricultural Technology.

    ERIC Educational Resources Information Center

    York, Walter

    This 2+2 articulated curriculum for the occupation of forest technician includes the following: program results and benefits; job description--forest technician; curriculum objective; duty and task listings for forest technician; recommended secondary and postsecondary course options flowchart; recommended student prerequisites; basic outlines for…

  17. Articulated Multimedia Physics, Lesson 11, Impulse and Momentum.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the eleventh lesson of the Articulated Multimedia Physics Course, instructional materials are presented in this study guide with relation to impulse and momentum. The topics are concerned with "quantity of motion," unit conversion, and related conservation laws. The content is arranged in scrambled form, and the use of matrix transparencies is…

  18. Articulated Multimedia Physics, Lesson 12, Work, Energy, and Power.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the twelfth lesson of the Articulated Multimedia Physics Course, instructional materials are presented in this study guide with relation to work, energy, and power. The topics are concerned with kinetic and potential energy, energy transfer in free falling bodies, and conservation laws. The content is arranged in scrambled form, and the use of…

  19. Articulation in Secondary and Postsecondary Occupational Education: Final Report.

    ERIC Educational Resources Information Center

    Fadale, LaVerna M.; And Others

    A study was conducted of formal occupational education articulation agreements between secondary and postsecondary institutions in New York State. Specifically, the study investigated the administration of agreements; the characteristics, goals, and length of time of agreements; benefits; problems and barriers; costs; and characteristics…

  20. Air Conditioning and Refrigeration Program Articulation, 1981-1982.

    ERIC Educational Resources Information Center

    Dallas County Community Coll. District, TX.

    Based on a survey of high school programs and courses in the Dallas County Community College District (DCCCD), this articulated program is designed to prepare students for entry-level employment in the air conditioning and refrigeration industry, including residential and commercial air conditioning and commercial refrigeration. The skills and…

  1. Articulated Multimedia Physics, Lesson 5, Graphs of Motion.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the fifth lesson of the Articulated Multimedia Physics Course, instructional materials are presented in this study guide. The subject matter is concerned with graphical presentations, mathematical expressions, and relationships between speed, position, and time. The content is arranged in the scrambled form, and the use of matrix transparencies…

  2. ARTICULATOR-RELATED REGISTRATION AND ANALYSIS OF SAGITTAL CONDYLAR INCLINATION.

    PubMed

    Cimić, Samir; Simunković, Sonja Kraljević; Suncana Simonić Kocijan; Matijević, Jurica; Dulcić, Niksa; Catić, Amir

    2015-12-01

    The purpose of this investigation was to study sagittal condylar inclination values within a uniform sample (Angle class I occlusion) using 'articulator-related registration' and Camper's plane as a reference plane. The study was performed on a sample of 58 Angle class I subjects (mean age 25.1, SD 3.1). Measurements were performed with an ultrasonic jaw tracking device with six degrees of freedom. After a paraocclusal tray was fixed in the mouth, each subject had to make three protrusive movements and three right and left laterotrusive movements. From protrusive movements the software of the device automatically calculated the left and the right sagittal condylar inclination values used for setting of the articulator. The mean sagittal condylar inclinationvalue was 41.0° (SD 10.5) for the right joint and 40.7° (SD 9.8) for the left joint. The maximum value was 65.0° for the right and 68.6° for the left joint, and the minimum value was 13.7° for the right and 21.7° for the left joint. The results of this study suggested the average articulator setting for sagittal condylar inclination for fully dentate adult subjects to be 40° in relation to Camper's plane. This is especially important for the articulators that are set up in relation to Camper's plane.

  3. Visual Word Recognition during Reading Is Followed by Subvocal Articulation

    ERIC Educational Resources Information Center

    Eiter, Brianna M.; Inhoff, Albrecht W.

    2010-01-01

    Three experiments examined whether the identification of a visual word is followed by its subvocal articulation during reading. An irrelevant spoken word (ISW) that was identical, phonologically similar, or dissimilar to a visual target word was presented when the eyes moved to the target in the course of sentence reading. Sentence reading was…

  4. Stuart Hall and the Theory and Practice of Articulation

    ERIC Educational Resources Information Center

    Clarke, John

    2015-01-01

    In this article, I argue that the idea of articulation links three different dimensions of Stuart Hall's work: it is central to the work of cultural politics, to the work of hegemony and to his practice of embodied pedagogy. I claim that his approach to pedagogy entails the art of listening combined with the practice of theorising in the service…

  5. Family History in Patients Who Present with Functional Articulation Disorders

    ERIC Educational Resources Information Center

    Alaraifi, Jehad Ahmad; Kamal, Sana Mohammed; Qa'dan, Wa'el Nafith; Haj-Tas, Maisa Atef

    2014-01-01

    This study aimed to examine family history of functional articulation disorders (FAD) among Jordanian patients who present with FAD, as well as to investigate the relation of other factors related to the disorder (age, gender, genetic connection between parents, sounds affected, and type of disorder). A convenience sample of 45 patients (ages…

  6. Articulation for Elementary School Foreign Language Programs: Challenges and Opportunities.

    ERIC Educational Resources Information Center

    Pesola, Carol Ann

    While foreign language instruction for elementary school children is gaining attention, poor articulation is a problem that has become more complex because of the variety of foreign language program models being developed. Five main types are in use: total immersion, partial immersion, foreign languages in the elementary school (FLES),…

  7. Articulation Rate in Childhood and Adolescence: Hebrew Speakers

    ERIC Educational Resources Information Center

    Amir, Ofer; Grinfeld, Doreen

    2011-01-01

    This study aimed to quantify articulation rate among Hebrew speaking children and adolescents across a wide age range, and to assess whether age-related differences vary according to metric. One hundred and forty children, in seven age groups, participated in this cross-sectional study. All children were recorded during conversation and a picture…

  8. The Effect of Articulation Style on Perception of Modulated Tempo

    ERIC Educational Resources Information Center

    Geringer, John M.; Madsen, Clifford K.; MacLeod, Rebecca B.; Kevin Droe

    2006-01-01

    We investigated the effect of legato and staccato articulation styles on the perception of modulated tempos. Ninety music majors served as participants. Listeners heard music examples that had been selected from two pieces, each of which included staccato and legato passages. Excerpts were presented to listeners in three conditions of tempo…

  9. College Student Access: How Articulation Agreements Support Rural Students

    ERIC Educational Resources Information Center

    Jaeger, Audrey J.; Dunstan, Stephany Brett; Dixon, Karrie Gibson

    2015-01-01

    Students from rural areas face additional burdens, such as affordability, academic preparation, and lack of college-going resources that make seeking, enrolling, and attending college more difficult. Community colleges offer hope to achieve a college degree for many rural students, and well-developed articulation agreements can be one way of…

  10. Dental Auxiliary Occupations. Interim Report.

    ERIC Educational Resources Information Center

    Kingston, Richard D.

    As part of a dental auxiliaries project, a Dental Auxiliary National Technical Advisory Committee was established, and its major undertaking was to assist in the development of a functional inventory for each of the three dental auxiliary occupations (dental assisting, dental hygiene, and dental laboratory technology). The analysis consisted of…

  11. Dental Exam for Children

    MedlinePlus

    ... and thumb sucking Toddlers, school-age children and adolescents During each regular checkup, the dentist or hygienist ... dental hygienist about proper oral health care for adolescents. American Dental Hygienists' Association. http://www.adha.org/ ...

  12. About Dental Amalgam Fillings

    MedlinePlus

    ... documents in the Related Resources section. Why is mercury used in dental amalgam? Approximately half of a ... about bioaccumulation, please see Related Resources. Is the mercury in dental amalgam the same as the mercury ...

  13. 75 FR 33169 - Dental Devices: Classification of Dental Amalgam, Reclassification of Dental Mercury, Designation...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-11

    ...-AG21 Dental Devices: Classification of Dental Amalgam, Reclassification of Dental Mercury, Designation of Special Controls for Dental Amalgam, Mercury, and Amalgam Alloy; Technical Amendment AGENCY: Food... classified dental amalgam as a class II device, reclassified dental mercury from class I to class II,...

  14. Accreditation in Dental Hygiene.

    ERIC Educational Resources Information Center

    National Commission on Accrediting, Washington, DC.

    The Council on Dental Education cooperates with the American Dental Hygienists' Association in developing educational requirements for schools of dental hygiene. To be eligible for accreditation, schools must operate on a non-profit basis. A school applying for accreditation completes a previsitation questionnaire concerning its program. The…

  15. Dental Manpower Fact Book.

    ERIC Educational Resources Information Center

    Ake, James N.; Johnson, Donald W.

    Statistical data on many aspects of dental and allied dental personnel supply, distribution, characteristics, and education and on certain other aspects of dental services are presented and discussed. The data on dentist supply show the national trend in the supply of active dentists since 1950 and the concurrent changes in dentist-to-population…

  16. Dental Laboratory Technology.

    ERIC Educational Resources Information Center

    Department of the Air Force, Washington, DC.

    The Air Force dental laboratory technology manual is designed as a basic training text as well as a reference source for dental laboratory technicians, a specialty occupation concerned with the design, fabrication, and repair of dental prostheses. Numerous instructive diagrams and photographs are included throughout the manual. The comprehensive…

  17. DENTAL SCHOOL PLANNING.

    ERIC Educational Resources Information Center

    GALAGAN, DONALD J.

    THIS DISCUSSION PRESENTS A COMPLETE PICTURE OF THE CURRENT STATE OF DENTAL EDUCATION WITH SUGGESTIONS FOR MEETING THE DEMANDS FOR DENTAL STAFF AND FACILITIES. THE AREAS INVESTIGATED ARE (1) OBJECTIVES IN DENTAL EDUCATION--COURSES, TEACHING MODES, INNOVATIONS IN CURRICULUM, COORDINATION OF BASIC AND CLINICAL INSTRUCTION, (2) FACILITY…

  18. Dental Assisting Laboratory Manual.

    ERIC Educational Resources Information Center

    Thiel, Sandra J.

    Compiled to introduce the dental assisting student to various techniques used in the dental office and to present theoretical information essential for the student's professional development, this laboratory guide consists of three units of instruction. The first unit is an introduction to dental assisting and contains five topics of study. The…

  19. Perspectives from Dental Research.

    ERIC Educational Resources Information Center

    Baum, Bruce J.

    1996-01-01

    This paper responds to the Institute of Medicine's 1995 report concerning the present status and future needs of dental education in the United States. It examines whether real reform is occurring at the National Institute of Dental Research, within the academic dental community, and within the practicing profession. It concludes that very little…

  20. Weaker Dental Enamel Explains Dental Decay

    PubMed Central

    Vieira, Alexandre R.; Gibson, Carolyn W.; Deeley, Kathleen; Xue, Hui; Li, Yong

    2015-01-01

    Dental caries continues to be the most prevalent bacteria-mediated non-contagious disease of humankind. Dental professionals assert the disease can be explained by poor oral hygiene and a diet rich in sugars but this does not account for caries free individuals exposed to the same risk factors. In order to test the hypothesis that amount of amelogenin during enamel development can influence caries susceptibility, we generated multiple strains of mice with varying levels of available amelogenin during dental development. Mechanical tests showed that dental enamel developed with less amelogenin is “weaker” while the dental enamel of animals over-expressing amelogenin appears to be more resistant to acid dissolution. PMID:25885796

  1. Gender recognition from unconstrained and articulated human body.

    PubMed

    Wu, Qin; Guo, Guodong

    2014-01-01

    Gender recognition has many useful applications, ranging from business intelligence to image search and social activity analysis. Traditional research on gender recognition focuses on face images in a constrained environment. This paper proposes a method for gender recognition in articulated human body images acquired from an unconstrained environment in the real world. A systematic study of some critical issues in body-based gender recognition, such as which body parts are informative, how many body parts are needed to combine together, and what representations are good for articulated body-based gender recognition, is also presented. This paper also pursues data fusion schemes and efficient feature dimensionality reduction based on the partial least squares estimation. Extensive experiments are performed on two unconstrained databases which have not been explored before for gender recognition.

  2. Efficient Reorientation Maneuvers for Spacecraft with Multiple Articulated Payloads

    NASA Technical Reports Server (NTRS)

    Mcclamroch, N. Harris

    1993-01-01

    A final report is provided which describes the research program during the period 3 Mar. 1992 to 3 Jun. 1993. A summary of the technical research questions that were studied and of the main results that were obtained is given. The specific outcomes of the research program, including both educational impacts as well as research publications, are listed. The research is concerned with efficient reorientation maneuvers for spacecraft with multiple articulated payloads.

  3. Oral approach-avoidance: affective consequences of muscular articulation dynamics.

    PubMed

    Topolinski, Sascha; Maschmann, Ira Theresa; Pecher, Diane; Winkielman, Piotr

    2014-06-01

    Can mouth movements shape attitudes? When people articulate different consonants (e.g., B or K) they press the tongue and the lips against various spots in the mouth. This allows for construction of words that feature systematic wanderings of consonantal stricture spots either from the front to the rear (inward; e.g., BENOKA) or from the rear to the front (outward; e.g., KENOBA) of the mouth. These wanderings of muscular strictures resemble the oral kinematics during either deglution (swallowing-like, inward movement) or expectoration (spitting-like, outward movement). Thus, we predicted that the articulation of inward and outward words induces motivational states associated with deglutition and expectoration--namely, approach and avoidance--which was tested in 9 experiments (total N = 822). Inward words were preferred over outward words, being labeled as nonsense words (Experiments 1, 4, 5, 6, and 9), company names (Experiment 2), or person names (Experiments 3, 7, and 8), with control words falling in between (Experiment 5). As a social-behavioral consequence, ostensible chat partners were more often chosen to interact with when having inward compared to outward names (Experiment 7). The effect was found in German-speaking (Experiments 1-5) and English-speaking (Experiment 6) samples, and it occurred even under silent reading (all experiments) and for negatively labeled targets (names of villains; Experiment 8). Showing articulation simulations as being the causal undercurrent, this effect was absent in aphasia patients who lacked covert subvocalizations (Experiment 9).

  4. Special Education School Articulation Program. Phase I: Program Implementation 1990-91. OREA Report.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY. Office of Research, Evaluation, and Assessment.

    New York City's Special Education School Articulation Program, which fosters informed student and parent choice about available high school program options, is described. Initial program objectives for the 1990-91 school year included hiring of school articulation coordinators and development of specific articulation plans by middle and high…

  5. Student Assessment System. Competency Verification Guide. Georgia Vocational Education Program Articulation.

    ERIC Educational Resources Information Center

    Moye, Mike; And Others

    This guide is designed to aid instructional personnel in all areas of vocational education in the articulation of secondary and postsecondary programs through verification of student competencies. It presents general information on what program articulation is and why it is important, how articulation may be achieved in the least constraining…

  6. 76 FR 16747 - Applications for New Awards; Hispanic-Serving Institutions STEM and Articulation Programs

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-25

    ... Applications for New Awards; Hispanic-Serving Institutions STEM and Articulation Programs AGENCY: Office of... Institutions STEM and Articulation Programs Notice inviting applications for new awards using fiscal year (FY... Programs: The Hispanic-Serving Institutions STEM and Articulation programs authorized under section 371...

  7. Building Better Bridges: Middle School to High School Articulation in Foreign Language Programs.

    ERIC Educational Resources Information Center

    Rieken, Elizabeth; And Others

    1996-01-01

    Surveys factors easing foreign language students' transition from middle to high school, including the type of program, degree of success in transition, problems in achieving effective articulation, and effective articulation strategies. Findings indicate that the greater the number of articulation strategies practiced, the greater likelihood…

  8. A survey of degree completion programs in dental hygiene education.

    PubMed

    Portillo, Karen M; Rogo, Ellen J; Calley, Kristin H; Cellucci, Leigh W

    2013-05-01

    The purpose of this descriptive study was to identify specific information related to U.S. dental hygiene baccalaureate degree completion programs. Learning experiences, assessment methods, and baccalaureate institutional partnerships were assessed. Of the sixty dental hygiene programs that offer a degree completion program, the forty-two that met the inclusion criteria (including having operated for at least three years) were invited to participate in a thirty-eight item online survey. A 62 percent (n=26) response rate was obtained. Learning experiences in responding programs included core dental hygiene courses, general education courses, and elective dental hygiene courses. Emphasis areas offered by various programs were in the specialty areas of education, public or community health, and research. Respondents reported that their graduates were employed in multiple settings (65 percent; n=17), with 19 percent (n=5) reporting employment in the combined grouping of private practice, education, and public health. Institutional partnerships included articulation agreements (88 percent; n=21), community college baccalaureate (8 percent; n=2), and university extension (4 percent; n=1) models. The findings of this study provide a baseline for assessing the educational composition and design of U.S. dental hygiene degree completion programs. However, results of this study showed inconsistencies among learning experiences that might raise concerns when considering students' level of preparation for graduate education and future leadership roles in the profession.

  9. What is dental ecology?

    PubMed

    Cuozzo, Frank P; Sauther, Michelle L

    2012-06-01

    Teeth have long been used as indicators of primate ecology. Early work focused on the links between dental morphology, diet, and behavior, with more recent years emphasizing dental wear, microstructure, development, and biogeochemistry, to understand primate ecology. Our study of Lemur catta at the Beza Mahafaly Special Reserve, Madagascar, has revealed an unusual pattern of severe tooth wear and frequent tooth loss, primarily the result of consuming a fallback food for which these primates are not dentally adapted. Interpreting these data was only possible by combining our areas of expertise (dental anatomy [FC] and primate ecology [MS]). By integrating theoretical, methodological, and applied aspects of both areas of research, we adopted the term "dental ecology"-defined as the broad study of how teeth respond to the environment. Specifically, we view dental ecology as an interpretive framework using teeth as a vehicle for understanding an organism's ecology, which builds upon earlier work, but creates a new synthesis of anatomy and ecology that is only possible with detailed knowledge of living primates. This framework includes (1) identifying patterns of dental pathology and tooth use-wear, within the context of feeding ecology, behavior, habitat variation, and anthropogenic change, (2) assessing ways in which dental development and biogeochemical signals can reflect habitat, environmental change and/or stress, and (3) how dental microstructure and macro-morphology are adapted to, and reflect feeding ecology. Here we define dental ecology, provide a short summary of the development of this perspective, and place our new work into this context.

  10. Dental hygiene in Slovakia.

    PubMed

    Luciak-Donsberger, C; Krizanová, M

    2004-08-01

    This article reports on the development of the dental hygiene profession in Slovakia from a global perspective. The aim is to inform about current developments and to examine, how access to qualified dental hygiene care might be improved and how professional challenges might be met. For an international study on dental hygiene, secondary source data were obtained from members of the House of Delegates of the International Federation of Dental Hygienists (IFDH) or by fax and e-mail from experts involved in the national professional and educational organization of dental hygiene in non-IFDH member countries, such as Slovakia. Responses were followed-up by interviews, e-mail correspondence, visits to international universities, and a review of supporting studies and reference literature. Results show that the introduction of dental hygiene in Slovakia in 1992 was inspired by the delivery of preventive care in Switzerland. Initiating local dentists and dental hygienists strive to attain a high educational level, equitable to that of countries in which dental hygiene has an established tradition of high quality care. Low access to qualified dental hygiene care may be a result of insufficient funding for preventive services, social and cultural lack of awareness of the benefits of preventive care, and of limitations inherent in the legal constraints preventing unsupervised dental hygiene practice. These may be a result of gender politics affecting a female-dominated profession and of a perception that dental hygiene is auxiliary to dental care. International comparison show that of all Eastern European countries, the dental hygiene profession appears most advanced in Slovakia. This is expressed in high evidence-based academic goals, in extensive work with international consultants from the Netherlands and Switzerland, in annual congresses of high professional quality, and in the establishment of a profession, which has not been introduced in all Western EU countries.

  11. Employment of Dental Hygienists as Dental Educators.

    ERIC Educational Resources Information Center

    Fong, Cynthia; Odrich, Johanna

    1987-01-01

    A study of the use of dental hygienists to teach periodontics, preventive dentistry, community dentistry, and public health courses looked at employment patterns and practices and the qualifications of the teachers. (MSE)

  12. Pathways in dental public health.

    PubMed

    Silverstein, Steven J

    2005-07-01

    Dental public health is one of the nine specialties of dentistry recognized by the American Dental Association Commission on Dental Accreditation. Dental public health has been defined as the "science and art of preventing and controlling dental diseases and promoting dental health through organized community efforts. It is that form of dental practice which serves the community as a patient rather than as an individual. It is concerned with the dental health education of the public, with applied dental research, and with the administration of group dental care programs as well as the prevention and control of dental diseases on a community basis." This article will describe the many career and educational pathways dentists may follow to become irvolved in the practice of dental public health.

  13. International dental standards.

    PubMed

    Jones, Derek W

    2007-09-22

    International dental standards are vital in maintaining the safety and quality of both the products and materials used by dental professionals and the many oral health products used by members of the general public, yet many dentists will be unaware of the role standards play in their daily practice. In this article, Derek W. Jones outlines the vital work of the International Standards Organization and highlights how standards pervade nearly every dental procedure.

  14. Dental radiology for children

    SciTech Connect

    Myers, D.R.

    1984-01-01

    The benefit for the child from the judicious use of diagnostic dental radiography is improved dental health. The risk to the child from dental diagnostic radiation exposure appears to be extremely low. Despite the low risk, the dentist must minimize the child's exposure to ionizing radiation by using sound clinical judgment to determine what radiographs are necessary and to provide children with optimal protection from ionizing radiation.

  15. Dental erosion, summary.

    PubMed

    ten Cate, J M; Imfeld, T

    1996-04-01

    Although reports on dental erosion have always appeared in the dental literature, there is currently a growing interest among researchers and clinicians. Potential risk factors for dental erosion are changed lifestyle and eating patterns, with increased consumption of acidic foods and beverages. Various gastrointestinal and eating disorders expose the dentition to frequent contacts with very acidic gastric content, which may lead to erosion. Whether these factors indeed lead, on a population scale, to a higher prevalence and incidence of erosion is yet to be established. This article summarizes the different aspects of the prevalence, pathology, etiology, assessment, prevention and treatment of dental erosion, and concludes with recommendations for future research.

  16. Dental Implant Systems

    PubMed Central

    Oshida, Yoshiki; Tuna, Elif B.; Aktören, Oya; Gençay, Koray

    2010-01-01

    Among various dental materials and their successful applications, a dental implant is a good example of the integrated system of science and technology involved in multiple disciplines including surface chemistry and physics, biomechanics, from macro-scale to nano-scale manufacturing technologies and surface engineering. As many other dental materials and devices, there are crucial requirements taken upon on dental implants systems, since surface of dental implants is directly in contact with vital hard/soft tissue and is subjected to chemical as well as mechanical bio-environments. Such requirements should, at least, include biological compatibility, mechanical compatibility, and morphological compatibility to surrounding vital tissues. In this review, based on carefully selected about 500 published articles, these requirements plus MRI compatibility are firstly reviewed, followed by surface texturing methods in details. Normally dental implants are placed to lost tooth/teeth location(s) in adult patients whose skeleton and bony growth have already completed. However, there are some controversial issues for placing dental implants in growing patients. This point has been, in most of dental articles, overlooked. This review, therefore, throws a deliberate sight on this point. Concluding this review, we are proposing a novel implant system that integrates materials science and up-dated surface technology to improve dental implant systems exhibiting bio- and mechano-functionalities. PMID:20480036

  17. Articulating What Infants Attune to in Native Speech

    PubMed Central

    Best, Catherine T.; Goldstein, Louis M.; Nam, Hosung; Tyler, Michael D.

    2016-01-01

    ABSTRACT To become language users, infants must embrace the integrality of speech perception and production. That they do so, and quite rapidly, is implied by the native-language attunement they achieve in each domain by 6–12 months. Yet research has most often addressed one or the other domain, rarely how they interrelate. Moreover, mainstream assumptions that perception relies on acoustic patterns whereas production involves motor patterns entail that the infant would have to translate incommensurable information to grasp the perception–production relationship. We posit the more parsimonious view that both domains depend on commensurate articulatory information. Our proposed framework combines principles of the Perceptual Assimilation Model (PAM) and Articulatory Phonology (AP). According to PAM, infants attune to articulatory information in native speech and detect similarities of nonnative phones to native articulatory patterns. The AP premise that gestures of the speech organs are the basic elements of phonology offers articulatory similarity metrics while satisfying the requirement that phonological information be discrete and contrastive: (a) distinct articulatory organs produce vocal tract constrictions and (b) phonological contrasts recruit different articulators and/or constrictions of a given articulator that differ in degree or location. Various lines of research suggest young children perceive articulatory information, which guides their productions: discrimination of between- versus within-organ contrasts, simulations of attunement to language-specific articulatory distributions, multimodal speech perception, oral/vocal imitation, and perceptual effects of articulator activation or suppression. We conclude that articulatory gesture information serves as the foundation for developmental integrality of speech perception and production. PMID:28367052

  18. Evolution of Autonomous Self-Righting Behaviors for Articulated Nanorovers

    NASA Technical Reports Server (NTRS)

    Tunstel, Edward

    1999-01-01

    Miniature rovers with articulated mobility mechanisms are being developed for planetary surface exploration on Mars and small solar system bodies. These vehicles are designed to be capable of autonomous recovery from overturning during surface operations. This paper describes a computational means of developing motion behaviors that achieve the autonomous recovery function. It proposes a control software design approach aimed at reducing the effort involved in developing self-righting behaviors. The approach is based on the integration of evolutionary computing with a dynamics simulation environment for evolving and evaluating motion behaviors. The automated behavior design approach is outlined and its underlying genetic programming infrastructure is described.

  19. The effects of receptive language training on articulation1

    PubMed Central

    Mann, Ronald A.; Baer, Donald M.

    1971-01-01

    The present study attempted to assess one condition of language exposure that might be operative in a normal environment, and experimentally determine its relevance to the acquisition of productive speech. The results demonstrated that the development of receptive language skills can be functionally related to productive speech. Specifically, the data indicated that exposure to words that have stimulus control over a subject's nonverbal pointing behavior can facilitate later articulation of those same words. Thus, this study draws attention to the fact that at least some classes of operants, in this case verbal, can be affected not only by their consequences, but by not obviously related antecedent events as well. PMID:16795305

  20. A blind algorithm for recovering articulator positions from acoustics

    SciTech Connect

    Hogden, John E

    2009-01-01

    MIMICRI is a signal-processing algorithm that has been shown to blindly infer and invert memoryless nonlinear functions of unobservable bandlimited signals, such as the mapping from the unobservable positions of the speech articulators to observable speech sounds. We review results of using MIMICRI on toy problems and on human speech data. We note that MIMICRI requires that the user specify two parameters: the dimensionality and pass-band of the unobservable signals. We show how to use cross-validation to help estimate the passband. An unexpected consequence of this work is that it helps separate signals with overlapping frequency bands.

  1. Instabilities of a spatial system of articulated pipes conveying fluid

    NASA Technical Reports Server (NTRS)

    Bohn, M. P.; Herrmann, G.

    1974-01-01

    A spatial system of two articulated pipes conveying fluid is examined analytically and experimentally. As the flow rate is increased, stable equilibrium may be lost by either divergence (static buckling) or by flutter (oscillations with increasing amplitude), depending upon the value of an angle beta which measures the 'out-of-planeness' of the system. It is found that in the range O less than beta less than 90 deg there exists a transition value below which stability is lost by flutter and above which stability is lost by divergence.

  2. Articulated limiter blade for a tokamak fusion reactor

    DOEpatents

    Doll, D.W.

    1982-10-21

    A limiter blade for a large tokomak fusion reactor includes three articulated blade sections for enabling the limiter blade to be adjusted for plasmas of different sizes. Each blade section is formed of a rigid backing plate carrying graphite tiles coated with titanium carbide, and the limiter blade forms a generally elliptic contour in both the poloidal and toroidal directions to uniformly distribute the heat flow to the blade. The limiter blade includes a central blade section movable along the major radius of the vacuum vessel, and upper and lower pivotal blade sections which may be pivoted by linear actuators having rollers held to the back surface of the pivotal blade sections.

  3. Articulated limiter blade for a tokamak fusion reactor

    DOEpatents

    Doll, David W.

    1985-01-01

    A limiter blade for a large tokomak fusion reactor includes three articulated blade sections for enabling the limiter blade to be adjusted for plasmas of different sizes. Each blade section is formed of a rigid backing plate carrying graphite tiles coated with titanium carbide, and the limiter blade forms a generally elliptic contour in both the poloidal and toroidal directions to uniformly distribute the heat flow to the blade. The limiter blade includes a central blade section movable along the major radius of the vacuum vessel, and upper and lower pivotal blade sections which may be pivoted by linear actuators having rollers held to the back surface of the pivotal blade sections.

  4. Computer-aided dental prostheses construction using reverse engineering.

    PubMed

    Solaberrieta, E; Minguez, R; Barrenetxea, L; Sierra, E; Etxaniz, O

    2014-01-01

    The implementation of computer-aided design/computer-aided manufacturing (CAD/CAM) systems with virtual articulators, which take into account the kinematics, constitutes a breakthrough in the construction of customised dental prostheses. This paper presents a multidisciplinary protocol involving CAM techniques to produce dental prostheses. This protocol includes a step-by-step procedure using innovative reverse engineering technologies to transform completely virtual design processes into customised prostheses. A special emphasis is placed on a novel method that permits a virtual location of the models. The complete workflow includes the optical scanning of the patient, the use of reverse engineering software and, if necessary, the use of rapid prototyping to produce CAD temporary prostheses.

  5. Education About Dental Hygienists' Roles in Public Dental Prevention Programs: Dental and Dental Hygiene Students' and Faculty Members' and Dental Hygienists' Perspectives.

    PubMed

    Pervez, Anushey; Kinney, Janet S; Gwozdek, Anne; Farrell, Christine M; Inglehart, Marita R

    2016-09-01

    In 2005, Public Act No. 161 (PA 161) was passed in Michigan, allowing dental hygienists to practice in approved public dental prevention programs to provide services for underserved populations while utilizing a collaborative agreement with a supervising dentist. The aims of this study were to assess how well dental and dental hygiene students and faculty members and practicing dental hygienists have been educated about PA 161, what attitudes and knowledge about the act they have, and how interested they are in additional education about it. University of Michigan dental and dental hygiene students and faculty members, students in other Michigan dental hygiene programs, and dental hygienists in the state were surveyed. Respondents (response rate) were 160 dental students (50%), 63 dental hygiene students (82%), 30 dental faculty members (26%), and 12 dental hygiene faculty members (52%) at the University of Michigan; 143 dental hygiene students in other programs (20%); and 95 members of the Michigan Dental Hygienists' Association (10%). The results showed that the dental students were less educated about PA 161 than the dental hygiene students, and the dental faculty members were less informed than the dental hygiene faculty members and dental hygienists. Responding dental hygiene faculty members and dental hygienists had more positive attitudes about PA 161 than did the students and dental faculty members. Most of the dental hygiene faculty members and dental hygienists knew a person providing services in a PA 161 program. Most dental hygiene students, faculty members, and dental hygienists wanted more education about PA 161. Overall, the better educated about the program the respondents were, the more positive their attitudes, and the more interested they were in learning more.

  6. Evaluation of articulation simulation system using artificial maxillectomy models.

    PubMed

    Elbashti, M E; Hattori, M; Sumita, Y I; Taniguchi, H

    2015-09-01

    Acoustic evaluation is valuable for guiding the treatment of maxillofacial defects and determining the effectiveness of rehabilitation with an obturator prosthesis. Model simulations are important in terms of pre-surgical planning and pre- and post-operative speech function. This study aimed to evaluate the acoustic characteristics of voice generated by an articulation simulation system using a vocal tract model with or without artificial maxillectomy defects. More specifically, we aimed to establish a speech simulation system for maxillectomy defect models that both surgeons and maxillofacial prosthodontists can use in guiding treatment planning. Artificially simulated maxillectomy defects were prepared according to Aramany's classification (Classes I-VI) in a three-dimensional vocal tract plaster model of a subject uttering the vowel /a/. Formant and nasalance acoustic data were analysed using Computerized Speech Lab and the Nasometer, respectively. Formants and nasalance of simulated /a/ sounds were successfully detected and analysed. Values of Formants 1 and 2 for the non-defect model were 675.43 and 976.64 Hz, respectively. Median values of Formants 1 and 2 for the defect models were 634.36 and 1026.84 Hz, respectively. Nasalance was 11% in the non-defect model, whereas median nasalance was 28% in the defect models. The results suggest that an articulation simulation system can be used to help surgeons and maxillofacial prosthodontists to plan post-surgical defects that will be facilitate maxillofacial rehabilitation.

  7. Hybrid markerless tracking of complex articulated motion in golf swings.

    PubMed

    Fung, Sim Kwoh; Sundaraj, Kenneth; Ahamed, Nizam Uddin; Kiang, Lam Chee; Nadarajah, Sivadev; Sahayadhas, Arun; Ali, Md Asraf; Islam, Md Anamul; Palaniappan, Rajkumar

    2014-04-01

    Sports video tracking is a research topic that has attained increasing attention due to its high commercial potential. A number of sports, including tennis, soccer, gymnastics, running, golf, badminton and cricket have been utilised to display the novel ideas in sports motion tracking. The main challenge associated with this research concerns the extraction of a highly complex articulated motion from a video scene. Our research focuses on the development of a markerless human motion tracking system that tracks the major body parts of an athlete straight from a sports broadcast video. We proposed a hybrid tracking method, which consists of a combination of three algorithms (pyramidal Lucas-Kanade optical flow (LK), normalised correlation-based template matching and background subtraction), to track the golfer's head, body, hands, shoulders, knees and feet during a full swing. We then match, track and map the results onto a 2D articulated human stick model to represent the pose of the golfer over time. Our work was tested using two video broadcasts of a golfer, and we obtained satisfactory results. The current outcomes of this research can play an important role in enhancing the performance of a golfer, provide vital information to sports medicine practitioners by providing technically sound guidance on movements and should assist to diminish the risk of golfing injuries.

  8. The oldest articulated chondrichthyan from the Early Devonian period.

    PubMed

    Miller, Randall F; Cloutier, Richard; Turner, Susan

    2003-10-02

    Chondrichthyans (including living sharks, skates, rays and chimaeras) have a fossil record of scales and dermal denticles perhaps dating back to the Late Ordovician period, about 455 million years ago. Their fossil tooth record extends to the earliest Devonian period, almost 418 million years ago, whereas the oldest known articulated shark remains date from the Early Devonian period, about 394 million years ago. Here we report the discovery of an articulated shark that is almost 409 million years old from the Early Devonian (early Emsian) period of New Brunswick, Canada. The specimen, identified as Doliodus problematicus (Woodward), sheds light on the earliest chondrichthyans and their interrelationships with basal jawed vertebrates. This species has been truly problematic. Previously known only from isolated teeth, it has been identified as an acanthodian and a chondrichthyan. This specimen is the oldest shark showing the tooth families in situ, and preserves one of the oldest chondrichthyan braincases. More notably, it shows the presence of paired pectoral fin-spines, previously unknown in cartilaginous fishes.

  9. Dynamic simulation of articulated rigid bodies with contact and collision.

    PubMed

    Weinstein, Rachel; Teran, Joseph; Fedkiw, Ron

    2006-01-01

    We propose a novel approach for dynamically simulating articulated rigid bodies undergoing frequent and unpredictable contact and collision. In order to leverage existing algorithms for nonconvex bodies, multiple collisions, large contact groups, stacking, etc., we use maximal rather than generalized coordinates and take an impulse-based approach that allows us to treat articulation, contact, and collision in a unified manner. Traditional constraint handling methods are subject to drift, and we propose a novel prestabilization method that does not require tunable potentially stiff parameters as does Baumgarte stabilization. This differs from poststabilization in that we compute allowable trajectories before moving the rigid bodies to their new positions, instead of correcting them after the fact when it can be difficult to incorporate the effects of contact and collision. A poststabilization technique is used for momentum and angular momentum. Our approach works with any black box method for specifying valid joint constraints and no special considerations are required for arbitrary closed loops or branching. Moreover, our implementation is linear both in the number of bodies and in the number of auxiliary contact and collision constraints, unlike many other methods that are linear in the number of bodies, but not in the number of auxiliary constraints.

  10. Variability in English vowels is comparable in articulation and acoustics.

    PubMed

    Noiray, Aude; Iskarous, Khalil; Whalen, D H

    2014-05-01

    The nature of the links between speech production and perception has been the subject of longstanding debate. The present study investigated the articulatory parameter of tongue height and the acoustic F1-F0 difference for the phonological distinction of vowel height in American English front vowels. Multiple repetitions of /i, ɪ, e, ε, æ/ in [(h)Vd] sequences were recorded in seven adult speakers. Articulatory (ultrasound) and acoustic data were collected simultaneously to provide a direct comparison of variability in vowel production in both domains. Results showed idiosyncratic patterns of articulation for contrasting the three front vowel pairs /i-ɪ/, /e-ε/ and /ε-æ/ across subjects, with the degree of variability in vowel articulation comparable to that observed in the acoustics for all seven participants. However, contrary to what was expected, some speakers showed reversals for tongue height for /ɪ/-/e/ that was also reflected in acoustics with F1 higher for /ɪ/ than for /e/. The data suggest the phonological distinction of height is conveyed via speaker-specific articulatory-acoustic patterns that do not strictly match features descriptions. However, the acoustic signal is faithful to the articulatory configuration that generated it, carrying the crucial information for perceptual contrast.

  11. Dental Laboratory Technician.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Center on Education and Training for Employment.

    This document, which is designed for use in developing a tech prep competency profile for the occupation of dental laboratory technician, lists technical competencies and competency builders for 13 units pertinent to the health technologies cluster in general and 8 units to the occupation of dental laboratory technician. The following skill areas…

  12. Dental Assisting Program Guide.

    ERIC Educational Resources Information Center

    Georgia Univ., Athens. Dept. of Vocational Education.

    This program guide contains the standard dental assisting curriculum for technical institutes in Georgia. The curriculum encompasses the minimum competencies required for entry-level dental assistants, and includes job skills in the technical areas of preventive dentistry; four-handed dentistry; chairside assisting with emphasis in diagnostics,…

  13. Clinical feline dental radiography.

    PubMed

    Lemmons, Matthew

    2013-05-01

    Dental radiography is a necessary diagnostic modality in small animal practice. It is not possible to accurately assess and diagnose tooth resorption, periodontal disease, endodontic disease, neoplasia and injury without it. Dental radiography is also necessary for treatment and assessment of the patient postoperatively.

  14. Dental Charting. Student's Manual.

    ERIC Educational Resources Information Center

    Weaver, Trudy Karlene; Apfel, Maura

    This manual is part of a series dealing with skills and information needed by students in dental assisting. The individualized student materials are suitable for classroom, laboratory, or cooperative training programs. This student manual contains four units covering the following topics: dental anatomical terminology; tooth numbering systems;…

  15. Workbook for Dental Records.

    ERIC Educational Resources Information Center

    Carpenter, Corinne K.; Volpe, Margaret E.

    This workbook contains l8 units of instruction for dental assistant students, each designed to give students practical experience in completing forms that simulate realistic situations in a dental office. Units are: (1) The Appointment Record, (2) The Recall System, (3) Clinical Records, (4) Estimates, (5) Daily Record Sheet, (6) Patient's…

  16. Dental Fear Among University Employees: Implications for Dental Education.

    ERIC Educational Resources Information Center

    Kaakko, Tarja; Milgrom, Peter; Coldwell, Susan E.; Getz, Tracy; Weinstein, Philip; Ramsay, Douglas S.

    1998-01-01

    A survey of 270 University of Washington permanent employees who were potential candidates for teaching clinics, found dental anxiety prevalent, correlating with poorer perceived dental health, longer intervals between dental appointments, higher frequency of past fear behaviors, more physical symptoms during last dental injection, and more…

  17. Individual tooth macrowear pattern guides the reconstruction of Sts 52 (Australopithecus africanus) dental arches.

    PubMed

    Benazzi, Stefano; Kullmer, Ottmar; Schulz, Dieter; Gruppioni, Giorgio; Weber, Gerhard W

    2013-02-01

    The functional restoration of the occlusal relationship between maxillary and mandibular tooth rows is a major challenge in modern dentistry and maxillofacial surgery. Similar technical challenges are present in paleoanthropology when considering fragmented and deformed mandibular and maxillary fossils. Sts 52, an Australopithecus africanus specimen from Sterkfontein Member 4, represents a typical case where the original shape of the dental arches is no longer preserved. It includes a partial lower face (Sts 52a) and a fragmented mandible (Sts 52b), both incomplete and damaged to such an extent to thwart attempts at matching upper and lower dentitions. We show how the preserved macro wear pattern of the tooth crowns can be used to functionally reconstruct Sts 52's dental arches. High-resolution dental stone casts of Sts 52 maxillary and mandibular dentition were mounted and repositioned in a dental articulator. The occlusal relationship between antagonists was restored based on the analysis of the occlusal wear pattern of each preserved tooth, considering all dental contact movements represented in the occlusal compass. The reconstructed dental arches were three-dimensional surface scanned and their occlusal kinematics tested in a simulation. The outcome of this contribution is the first functional restoration of A. africanus dental arches providing new morphometric data for specimen Sts 52. It is noteworthy that the method described in this case study might be applied to several other fossil specimens.

  18. Dynamics and control of robotic aircraft with articulated wings

    NASA Astrophysics Data System (ADS)

    Paranjape, Aditya Avinash

    There is a considerable interest in developing robotic aircraft, inspired by birds, for a variety of missions covering reconnaissance and surveillance. Flapping wing aircraft concepts have been put forth in light of the efficiency of flapping flight at small scales. These aircraft are naturally equipped with the ability to rotate their wings about the root, a form of wing articulation. This thesis covers some problems concerning the performance, stability and control of robotic aircraft with articulated wings in gliding flight. Specifically, we are interested in aircraft without a vertical tail, which would then use wing articulation for longitudinal as well as lateral-directional control. Although the dynamics and control of articulated wing aircraft share several common features with conventional fixed wing aircraft, the presence of wing articulation presents several unique benefits as well as limitations from the perspective of performance and control. One of the objective of this thesis is to understand these features using a combination of theoretical and numerical tools. The aircraft concept envisioned in this thesis uses the wing dihedral angles for longitudinal and lateral-directional control. Aircraft with flexible articulated wings are also investigated. We derive a complete nonlinear model of the flight dynamics incorporating dynamic CG location and the changing moment of inertia. We show that symmetric dihedral configuration, along with a conventional horizontal tail, can be used to control flight speed and flight path angle independently of each other. This characteristic is very useful for initiating an efficient perching maneuver. It is shown that wing dihedral angles alone can effectively regulate sideslip during rapid turns and generate a wide range of equilibrium turn rates while maintaining a constant flight speed and regulating sideslip. We compute the turning performance limitations that arise due to the use of wing dihedral for yaw control

  19. Health Instruction Packages: Permanent Teeth, Dental Deposits, and Dental Instruments. Dientes Permanentes, Depositos Dentales y Instrumentos Dentales.

    ERIC Educational Resources Information Center

    Lind, Patricia; Germano, Catherine

    These five learning modules use text interspersed with illustrations and reinforcement exercises to instruct dental aide and dental hygiene students about jaw bones and gums, dental deposits, and dental instruments. The first four modules were prepared by Patricia Lind in both Spanish and English. "The Gum and Bone of Permanent Teeth"…

  20. High-Performance 3D Articulated Robot Display

    NASA Technical Reports Server (NTRS)

    Powell, Mark W.; Torres, Recaredo J.; Mittman, David S.; Kurien, James A.; Abramyan, Lucy

    2011-01-01

    In the domain of telerobotic operations, the primary challenge facing the operator is to understand the state of the robotic platform. One key aspect of understanding the state is to visualize the physical location and configuration of the platform. As there is a wide variety of mobile robots, the requirements for visualizing their configurations vary diversely across different platforms. There can also be diversity in the mechanical mobility, such as wheeled, tracked, or legged mobility over surfaces. Adaptable 3D articulated robot visualization software can accommodate a wide variety of robotic platforms and environments. The visualization has been used for surface, aerial, space, and water robotic vehicle visualization during field testing. It has been used to enable operations of wheeled and legged surface vehicles, and can be readily adapted to facilitate other mechanical mobility solutions. The 3D visualization can render an articulated 3D model of a robotic platform for any environment. Given the model, the software receives real-time telemetry from the avionics system onboard the vehicle and animates the robot visualization to reflect the telemetered physical state. This is used to track the position and attitude in real time to monitor the progress of the vehicle as it traverses its environment. It is also used to monitor the state of any or all articulated elements of the vehicle, such as arms, legs, or control surfaces. The visualization can also render other sorts of telemetered states visually, such as stress or strains that are measured by the avionics. Such data can be used to color or annotate the virtual vehicle to indicate nominal or off-nominal states during operation. The visualization is also able to render the simulated environment where the vehicle is operating. For surface and aerial vehicles, it can render the terrain under the vehicle as the avionics sends it location information (GPS, odometry, or star tracking), and locate the vehicle

  1. A maximum likelihood approach to estimating articulator positions from speech acoustics

    SciTech Connect

    Hogden, J.

    1996-09-23

    This proposal presents an algorithm called maximum likelihood continuity mapping (MALCOM) which recovers the positions of the tongue, jaw, lips, and other speech articulators from measurements of the sound-pressure waveform of speech. MALCOM differs from other techniques for recovering articulator positions from speech in three critical respects: it does not require training on measured or modeled articulator positions, it does not rely on any particular model of sound propagation through the vocal tract, and it recovers a mapping from acoustics to articulator positions that is linearly, not topographically, related to the actual mapping from acoustics to articulation. The approach categorizes short-time windows of speech into a finite number of sound types, and assumes the probability of using any articulator position to produce a given sound type can be described by a parameterized probability density function. MALCOM then uses maximum likelihood estimation techniques to: (1) find the most likely smooth articulator path given a speech sample and a set of distribution functions (one distribution function for each sound type), and (2) change the parameters of the distribution functions to better account for the data. Using this technique improves the accuracy of articulator position estimates compared to continuity mapping -- the only other technique that learns the relationship between acoustics and articulation solely from acoustics. The technique has potential application to computer speech recognition, speech synthesis and coding, teaching the hearing impaired to speak, improving foreign language instruction, and teaching dyslexics to read. 34 refs., 7 figs.

  2. Forensic reference data on articulation rate in German.

    PubMed

    Jessen, Michael

    2007-09-01

    Articulation rate (AR) is one of the parameters used in forensic voice comparisons for the purpose of providing evidence for or against speaker identity, yet at present multi-speaker studies on this parameter are very rare. In order to alleviate this situation AR was measured in the speech of 100 German-speaking male subjects. Histograms were provided from which the forensic expert can infer the percentages of different AR values in the population. Separate histograms were provided for mean AR and standard deviation of AR. It was also found that mean AR is significantly higher in read than spontaneous speech and that AR standard deviation is significantly smaller in read than spontaneous speech, although many individual speakers deviate from this general pattern.

  3. Articulated Arm Coordinate Measuring Machine Calibration by Laser Tracker Multilateration

    PubMed Central

    Majarena, Ana C.; Brau, Agustín; Velázquez, Jesús

    2014-01-01

    A new procedure for the calibration of an articulated arm coordinate measuring machine (AACMM) is presented in this paper. First, a self-calibration algorithm of four laser trackers (LTs) is developed. The spatial localization of a retroreflector target, placed in different positions within the workspace, is determined by means of a geometric multilateration system constructed from the four LTs. Next, a nonlinear optimization algorithm for the identification procedure of the AACMM is explained. An objective function based on Euclidean distances and standard deviations is developed. This function is obtained from the captured nominal data (given by the LTs used as a gauge instrument) and the data obtained by the AACMM and compares the measured and calculated coordinates of the target to obtain the identified model parameters that minimize this difference. Finally, results show that the procedure presented, using the measurements of the LTs as a gauge instrument, is very effective by improving the AACMM precision. PMID:24688418

  4. Articulated figure positioning by multiple constraints. [in computer graphics

    NASA Technical Reports Server (NTRS)

    Badler, Norman I.; Manoochehri, Kamran H.; Walters, Graham

    1987-01-01

    A problem that arises in positioning an articulated figure is the solution of three-dimensional joint positions (kinematics) when goal positions, rather than joint angles, are given. If more than one such goal is to be achieved, the problem is often solved interactively by positioning or solving one component of the linkage, then adjusting another, then redoing the first, and so on. This iterative process is slow and tedious. The paper presents a method that automatically solves multiple simultaneous joint position goals. The user interface offers a six-degree-of-freedom input device to specify joint angles and goal positions interactively. Examples are used to demonstrate the power and efficiency of this method for key-position animation.

  5. Adaptive filter design using recurrent cerebellar model articulation controller.

    PubMed

    Lin, Chih-Min; Chen, Li-Yang; Yeung, Daniel S

    2010-07-01

    A novel adaptive filter is proposed using a recurrent cerebellar-model-articulation-controller (CMAC). The proposed locally recurrent globally feedforward recurrent CMAC (RCMAC) has favorable properties of small size, good generalization, rapid learning, and dynamic response, thus it is more suitable for high-speed signal processing. To provide fast training, an efficient parameter learning algorithm based on the normalized gradient descent method is presented, in which the learning rates are on-line adapted. Then the Lyapunov function is utilized to derive the conditions of the adaptive learning rates, so the stability of the filtering error can be guaranteed. To demonstrate the performance of the proposed adaptive RCMAC filter, it is applied to a nonlinear channel equalization system and an adaptive noise cancelation system. The advantages of the proposed filter over other adaptive filters are verified through simulations.

  6. Language and the (im)possibilities of articulating spirituality.

    PubMed

    Bruce, Anne; Sheilds, Laurene; Molzahn, Anita

    2011-03-01

    Despite growing interest in spiritual matters throughout society, definitions and descriptions of spirituality seem incomplete or otherwise unsatisfactory. In this article, the authors consider the possibility that such incompleteness is perhaps necessary and welcomed in addressing spirituality. In particular, they investigate the challenges of using metaphor and metonymic approaches to "languaging" spirituality. By exploring these figures of speech they hope to diversify how nurses articulate deeply personal and perhaps enigmatic human phenomena such as spirituality. Metaphoric language uses everyday structures to help make sense of complex, emotional, and abstract experience. Whereas metaphor creates substitutive relationships between things and provides insights into conceptualizing spirituality, metonymy and metonymic writing establish relationships of contiguity. Whereas metaphor functions to represent and facilitates understanding and feelings about spirituality, metonymy disrupts while opening possibilities of moving beyond binary thinking. Attending to language and its various ontological assumptions opens diverse and potentially more inclusive possibilities.

  7. Articulations of Health and Poverty Among Women on WIC.

    PubMed

    Yehya, Nadine A; Dutta, Mohan J

    2015-01-01

    With the global financial meltdown, the crisis of poverty has deepened in communities across the United States. This essay reports results from a culture-centered project on fostering spaces for listening to the voices of the poor in CrossRoads County, Indiana. It highlights the intersections of health and poverty as they emerge from the narratives of mothers utilizing the Supplemental Nutrition Program for Women, Infants, and Children (WIC). Depression, humiliation, and inaccessibility to health care and healthy living outline the struggles of women as they negotiate their access to health. The articulations of agency are situated around competing cultural narratives that, on the one hand, draw on the threads of individual responsibility which resonate through mainstream discourses of poverty in the United States and, on the other hand, interrogate the structural erasure of the basic capacities of health.

  8. Genetic-based motion planning for articulated robotic manipulators

    NASA Astrophysics Data System (ADS)

    Chan, Kwong K.; Zalzala, Ali M. S.

    1993-05-01

    A genetic based algorithm for the minimum time trajectory planning of articulated robotic manipulators is proposed. The planning procedure is performed in the configuration space and respects all physical constraints imposed on the manipulator design, including the limits on the torque values applied to the motor of each joint of the arm. The complete nonlinear dynamic robot model is incorporated in the formulation. The purpose of the algorithm is to tessellate joint space into a grid of possible motion nodes, where at each option node, given the position and velocity at the previous node, possible velocity values are constrained by the time optimality together with the dynamics of the arm. The algorithm is proven to be more efficient than conventional heuristic search technique with a reduction of the execution time.

  9. The oldest articulated osteichthyan reveals mosaic gnathostome characters.

    PubMed

    Zhu, Min; Zhao, Wenjin; Jia, Liantao; Lu, Jing; Qiao, Tuo; Qu, Qingming

    2009-03-26

    The evolutionary history of osteichthyans (bony fishes plus tetrapods) extends back to the Ludlow epoch of the Silurian period. However, these Silurian forms have been documented exclusively by fragmentary fossils. Here we report the discovery of an exceptionally preserved primitive fish from the Ludlow of Yunnan, China, that represents the oldest near-complete gnathostome (jawed vertebrate). The postcranial skeleton of this fish includes a primitive pectoral girdle and median fin spine as in non-osteichthyan gnathostomes, but a derived macromeric squamation as in crown osteichthyans, and substantiates the unexpected mix of postcranial features in basal sarcopterygians, previously restored from the disarticulated remains of Psarolepis. As the oldest articulated sarcopterygian, the new taxon offers insights into the origin and early divergence of osteichthyans, and indicates that the minimum date for the actinopterygian-sarcopterygian split was no later than 419 million years ago.

  10. Articulation of extreme formant patterns for emphasized vowels.

    PubMed

    Erickson, Donna

    2002-01-01

    This study examined formant, jaw and tongue dorsum measurements from X-ray microbeam recordings of American English speakers producing emphasized vs. unemphasized words containing high-front, mid-front and low vowels. For emphasized vowels, the jaw position, regardless of vowel height, was lower, while the tongue dorsum had a more extreme articulation in the direction of the phonological specification of the vowel. For emphasized low vowels, the tongue dorsum position was lower with the acoustic consequence of F1 and F2 bunched closer together. For emphasized high and mid-front vowels, the tongue was more forward with the acoustic consequence of F1 and F2 spread more apart. These findings are interpreted within acoustic models of speech production. They also provide empirical data which have application to the C/D model hypothesis that both increased lowering of jaw and enhanced tongue gesture are consequences of a magnitude increase in the syllable pulse due to emphasis.

  11. The complete mitochondrial genome of the articulate brachiopod Terebratalia transversa.

    PubMed

    Helfenbein, K G; Brown, W M; Boore, J L

    2001-09-01

    We sequenced the complete mitochondrial DNA (mtDNA) of the articulate brachiopod Terebratalia transversa. The circular genome is 14,291 bp in size, relatively small compared with other published metazoan mtDNAs. The 37 genes commonly found in animal mtDNA are present; the size decrease is due to the truncation of several tRNA, rRNA, and protein genes, to some nucleotide overlaps, and to a paucity of noncoding nucleotides. Although the gene arrangement differs radically from those reported for other metazoans, some gene junctions are shared with two other articulate brachiopods, Laqueus rubellus and Terebratulina retusa. All genes in the T. transversa mtDNA, unlike those in most metazoan mtDNAs reported, are encoded by the same strand. The A+T content (59.1%) is low for a metazoan mtDNA, and there is a high propensity for homopolymer runs and a strong base-compositional strand bias. The coding strand is quite G+T-rich, a skew that is shared by the confamilial (laqueid) species L. rubellus but is the opposite of that found in T. retusa, a cancellothyridid. These compositional skews are strongly reflected in the codon usage patterns and the amino acid compositions of the mitochondrial proteins, with markedly different usages being observed between T. retusa and the two laqueids. This observation, plus the similarity of the laqueid noncoding regions to the reverse complement of the noncoding region of the cancellothyridid, suggests that an inversion that resulted in a reversal in the direction of first-strand replication has occurred in one of the two lineages. In addition to the presence of one noncoding region in T. transversa that is comparable with those in the other brachiopod mtDNAs, there are two others with the potential to form secondary structures; one or both of these may be involved in the process of transcript cleavage.

  12. Optimal visual-haptic integration with articulated tools.

    PubMed

    Takahashi, Chie; Watt, Simon J

    2017-02-18

    When we feel and see an object, the nervous system integrates visual and haptic information optimally, exploiting the redundancy in multiple signals to estimate properties more precisely than is possible from either signal alone. We examined whether optimal integration is similarly achieved when using articulated tools. Such tools (tongs, pliers, etc) are a defining characteristic of human hand function, but complicate the classical sensory 'correspondence problem' underlying multisensory integration. Optimal integration requires establishing the relationship between signals acquired by different sensors (hand and eye) and, therefore, in fundamentally unrelated units. The system must also determine when signals refer to the same property of the world-seeing and feeling the same thing-and only integrate those that do. This could be achieved by comparing the pattern of current visual and haptic input to known statistics of their normal relationship. Articulated tools disrupt this relationship, however, by altering the geometrical relationship between object properties and hand posture (the haptic signal). We examined whether different tool configurations are taken into account in visual-haptic integration. We indexed integration by measuring the precision of size estimates, and compared our results to optimal predictions from a maximum-likelihood integrator. Integration was near optimal, independent of tool configuration/hand posture, provided that visual and haptic signals referred to the same object in the world. Thus, sensory correspondence was determined correctly (trial-by-trial), taking tool configuration into account. This reveals highly flexible multisensory integration underlying tool use, consistent with the brain constructing internal models of tools' properties.

  13. The complete mitochondrial genome of Articulate Brachiopod Terebratal ia transversa

    SciTech Connect

    Helfenbein, Kevin G.; Brown, Wesley M.; Boore, Jeffrey L.

    2001-07-01

    We have sequenced the complete mitochondrial DNA (mtDNA) of the articulate brachiopod Terebratalia transversa. The circular genome is 14,291 bp in size, relatively small compared to other published metazoan mtDNAs. The 37 genes commonly found in animal mtDNA are present; the size decrease is due to the truncation of several tRNA, rRNA, and protein genes, to some nucleotide overlaps, and to a paucity of non-coding nucleotides. Although the gene arrangement differs radically from those reported for other metazoans, some gene junctions are shared with two other articulate brachiopods, Laqueus rubellus and Terebratulina retusa. All genes in the T. transversa mtDNA, unlike those in most metazoan mtDNAs reported, are encoded by the same strand. The A+T content (59.1 percent) is low for a metazoan mtDNA, and there is a high propensity for homopolymer runs and a strong base-compositional strand bias. The coding strand is quite G+T-rich, a skew that is shared by the confamilial (laqueid) specie s L. rubellus, but opposite to that found in T. retusa, a cancellothyridid. These compositional skews are strongly reflected in the codon usage patterns and the amino acid compositions of the mitochondrial proteins, with markedly different usage observed between T. retusa and the two laqueids. This observation, plus the similarity of the laqueid non-coding regions to the reverse complement of the non-coding region of the cancellothyridid, suggest that an inversion that resulted in a reversal in the direction of first-strand replication has occurred in one of the two lineages. In addition to the presence of one non-coding region in T. transversa that is comparable to those in the other brachiopod mtDNAs, there are two others with the potential to form secondary structures; one or both of these may be involved in the process of transcript cleavage.

  14. Dental Compressed Air Systems.

    DTIC Science & Technology

    1992-03-01

    I AL-TR-IWI-0uuu AD-A249 954 DENTAL COMPRESSED AIMYTM R Curtis D. Weyrmuch, Mejor, USAP, D Samuel P.Dvs iueatclpi SF.O N AEROSPACE MwaEDIN mwr~ComA G...FUNDING NUMBERS Dental Compressed Air Systems PE - 87714F PR - 7350 TA - 22 D. Weyrauch WU - XX Samuel P. Davis George W. Gaines 7. PERFORMING...words) The purpose of this report is to update guidelines on dental compressed air systems (DCA). Much of the information was obtained from a survey

  15. Standing equine dental surgery.

    PubMed

    Menzies, Robert A; Easley, Jack

    2014-04-01

    Dental surgeries refer to procedures that affect the dental tissues or their supporting structures. With the development of specific, efficacious, and conservative treatments, morbidity risks have been lowered and chances of benefiting the health of equids improved. Advances in quality of sedation, analgesia, and locoregional anesthesia allow a majority of dental surgeries to be performed in the standing patient. This update focuses on an orthograde endodontic technique, a minimally invasive buccotomy technique, with the potential to combine it with a transbuccal screw extraction technique, and revisits the AO pinless external fixator for fractures of the body of the mandible.

  16. Feline dental disease.

    PubMed

    Frost, P; Williams, C A

    1986-09-01

    Periodontal disease and chronic gingivitis/stomatitis are the most common feline dental diseases. With routine dental care and increased emphasis on home oral hygiene, these diseases can be controlled. Cats can be seen with a number of other dental disorders, and improved treatment methods such as restorations of early subgingival resorptive lesions, endodontic therapy, and orthodontic therapy can be performed successfully. More study and research are necessary about the gingivitis/stomatitis syndrome and subgingival resorptive lesions so that improved prevention and treatment recommendations can be made.

  17. Economic impact of dental hygienists on solo dental practices.

    PubMed

    Lazar, Vickie F; Guay, Albert H; Beazoglou, Tryfon J

    2012-08-01

    The fact that a significant percentage of dentists employ dental hygienists raises an important question: Are dental practices that utilize a dental hygienist structurally and operationally different from practices that do not? This article explores differences among dental practices that operate with and without dental hygienists. Using data from the American Dental Association's 2003 Survey of Dental Practice, a random sample survey of U.S. dentists, descriptive statistics were used to compare selected characteristics of solo general practitioners with and without dental hygienists. Multivariate regression analysis was used to estimate the effect of dental hygienists on the gross billings and net incomes of solo general practitioners. Differences in practice characteristics--such as hours spent in the practice and hours spent treating patients, wait time for a recall visit, number of operatories, square feet of office space, net income, and gross billings--were found between solo general practitioners who had dental hygienists and those who did not. Solo general practitioners with dental hygienists had higher gross billings. Higher gross billings would be expected, as would higher expenses. However, net incomes of those with dental hygienists were also higher. In contrast, the mean waiting time for a recall visit was higher among dentists who employed dental hygienists. Depending on personal preferences, availability of qualified personnel, etc., dentists who do not employ dental hygienists but have been contemplating that path may want to further research the benefits and opportunities that may be realized.

  18. Method for analyzing articulated torques of heavy-duty six-legged robot

    NASA Astrophysics Data System (ADS)

    Zhuang, Hongchao; Gao, Haibo; Ding, Liang; Liu, Zhen; Deng, Zongquan

    2013-07-01

    The accuracy of an articulated torque analysis influences the comprehensive performances of heavy-duty multi-legged robots. Currently, the extremal estimation method and some complex methods are employed to calculate the articulated torques, which results in a large safety margin or a large number of calculations. To quickly obtain accurate articulated torques, an analysis method for the articulated torque is presented for an electrically driven heavy-duty six-legged robot. First, the rearmost leg that experiences the maximum normal contact force is confirmed when the robot transits a slope. Based on the ant-type and crab-type tripod gaits, the formulas of classical mechanics and MATLAB software are employed to theoretically analyze the relevant static torques of the joints. With the changes in the joint angles for the abductor joint, hip joint, and knee joint, variable tendency charts and extreme curves are obtained for the static articulated torques. Meanwhile, the maximum static articulated torques and the corresponding poses of the robot are also obtained. According to the poses of the robot under the maximum static articulated torques, ADAMS software is used to carry out a static simulation analysis. Based on the relevant simulation curves of the articulated torques, the maximum static articulated torques are acquired. A comparative analysis of the maximum static articulated torques shows that the theoretical calculation values are higher than the static simulation values, and the maximum error value is approximately 10%. The proposed method lays a foundation for quickly determining accurate articulated torques to develop heavy-duty six-legged robots.

  19. Glossary of Dental Terms

    MedlinePlus

    ... of entire communities, and can design and administer large-scale prevention and dental care programs by compiling and analyzing statistics Radiosurgery surgery technique that uses radio waves to produce a pressureless, ...

  20. Interpretation of dental radiographs.

    PubMed

    Woodward, Tony M

    2009-02-01

    Interpretation of dental radiographs is fairly straightforward, with a handful of common patterns making up the majority of pathology. This article covers normal radiographic anatomy, endodontic disease, periodontal disease, neoplastic changes, tooth resorption, caries, and radiographic signs of oral trauma.

  1. Dental Care in Scleroderma

    MedlinePlus

    ... a side effect • Avoid the spiral of depression – depression causes worse oral health and poor oral health worsens depression. Suggestions for your dental appointments: • Tell the dentist ...

  2. American Dental Education Association

    MedlinePlus

    ... ADEA Application Services ADEA AADSAS® ADEA CAAPID® ADEA PASS® ADEA DHCAS® Career Resources DentEd Jobs Placing Ads ... Students & Residents Prospective Students Application Services AADSAS CAAPID PASS DHCAS ADEA AADSAS Applicants Prospective applicants to dental ...

  3. American Dental Hygienists' Association

    MedlinePlus

    ... Working Column Journal of Dental Hygiene Author Guidelines Advertising Subscribe Resources Resources About ADHA About Promo (DO ... Member Benefits Footer Copy Legal Inquiries | Contact Us | Advertising | Media Inquiries | Staff / Board Login ©2012-2017 ADHA. ...

  4. Dental Treatment Considerations

    MedlinePlus

    ... and modifying dental treatment to accommodate altered muscle strength. Appointment Scheduling It is important to realize that ... and take advantage of the typically greater muscle strength during the morning hours. Appointments are best scheduled ...

  5. Dental Caries (Tooth Decay)

    MedlinePlus

    ... form does not collect any actual information. External Web Site Policy This graphic notice ( ) means that you are ... the link. Home Contact Us Viewers and Players Site Map FOIA Web Policies Privacy Policy National Institute of Dental and ...

  6. Diabetes: Dental Tips

    MedlinePlus

    ... form does not collect any actual information. External Web Site Policy This graphic notice ( ) means that you are ... the link. Home Contact Us Viewers and Players Site Map FOIA Web Policies Privacy Policy National Institute of Dental and ...

  7. Portable Dental System

    NASA Technical Reports Server (NTRS)

    1980-01-01

    Portable dental system provides dental care in isolated communities. System includes a patient's chair and a dentist's stool, an X-ray machine and a power unit, all of which fold into compact packages. A large yellow "pumpkin" is a collapsible compressed air tank. Portable system has been used successfully in South America in out of the way communities with this back-packable system, and in American nursing homes. This product is no longer manufactured.

  8. Dental physical examination.

    PubMed

    Baker, G J

    1998-08-01

    The objectives of the equine dental physical examination are to detect and quantify oral and dental disorders, to propose and carry out their treatment, and to implement management programs. The veterinarian should be able to offer a prognosis and to detail any future treatment or management plans that may be required. These objectives should take into account the cost of these procedures, and the veterinarian should be prepared to offer a cost-benefit analysis of the problem and the proposed cures.

  9. Dental considerations in anaesthesia

    PubMed Central

    2016-01-01

    Dental trauma as a result of anaesthesia practice is a relevant issue concerning morbidity and litigation. The investigator aimed to consolidate pertinent information on this issue to aid in the redressal of such an occurrence. A review of this relevant literature alongwith the author’s suggestions towards the management of the various kinds of dental trauma sustained as a result of anaesthesia practice is presented. PMID:27974970

  10. TRICARE Dental Programs

    DTIC Science & Technology

    2011-01-01

    enrollee – $1,500 lifetime maximum for orthodontics – Contractor: Delta Dental of California 2011 MHS Conference TRICARE Retiree Dental Program...Benefits Comprehensive benefits 12-month waiting period for crowns, prosthetics and orthodontics No waiting period if enroll within 120 days of...retiring from active duty or transfer to Retired Reserve status from National Guard or Reserve  Orthodontics for children and adults Accident coverage

  11. Dental arch asymmetry

    PubMed Central

    Al-Zubair, Nabil Muhsen

    2014-01-01

    Objective: This study was conducted to assess the dental arch asymmetry in a Yemeni sample aged (18-25) years. Materials and Methods: The investigation involved clinical examination of 1479 adults; only 253 (129 females, 124 males) out of the total sample were selected to fulfill the criteria for the study sample. Study models were constructed and evaluated to measure mandibular arch dimensions. Three linear distances were utilized on each side on the dental arch: Incisal-canine distance, canine-molar distance and incisal-molar distance, which represent the dental arch segmental measurements. Results: When applying “t-test” at P < 0.05, no significant differences were found between the right and left canine-molar, incisal-canine and incisal-molar distances in both dental arches for both sexes. The greater variation (0.30 mm) was observed between right and left canine-molar distance in the maxillary dental arch in male and the smaller (0.04 mm) in the mandibular dental arch between the right and left canine-molar distance in females. Conclusion: The findings of the present study revealed a symmetrical pattern of dental arches, since the right and left sides showed no statistically significant difference. In general, it can be observed that the measurements related to the central incisors and canines have the widest range of reading and give the impression that the location of central incisor and canines to each other and to other teeth is the strongest factor in determining the dental arch asymmetry. PMID:24966774

  12. Saliva and dental erosion

    PubMed Central

    BUZALAF, Marília Afonso Rabelo; HANNAS, Angélicas Reis; KATO, Melissa Thiemi

    2012-01-01

    Dental erosion is a multifactorial condition. The consideration of chemical, biological and behavioral factors is fundamental for its prevention and therapy. Among the biological factors, saliva is one of the most important parameters in the protection against erosive wear. Objective This review discusses the role of salivary factors on the development of dental erosion. Material and Methods A search was undertaken on MEDLINE website for papers from 1969 to 2010. The keywords used in the research were "saliva", "acquired pellicle", "salivary flow", "salivary buffering capacity" and "dental erosion". Inclusion of studies, data extraction and quality assessment were undertaken independently and in duplicate by two members of the review team. Disagreements were solved by discussion and consensus or by a third party. Results Several characteristics and properties of saliva play an important role in dental erosion. Salivary clearance gradually eliminates the acids through swallowing and saliva presents buffering capacity causing neutralization and buffering of dietary acids. Salivary flow allows dilution of the acids. In addition, saliva is supersaturated with respect to tooth mineral, providing calcium, phosphate and fluoride necessary for remineralization after an erosive challenge. Furthermore, many proteins present in saliva and acquired pellicle play an important role in dental erosion. Conclusions Saliva is the most important biological factor affecting the progression of dental erosion. Knowledge of its components and properties involved in this protective role can drive the development of preventive measures targeting to enhance its known beneficial effects. PMID:23138733

  13. Articulation at shoulder level--a pilot experimental study on car seat comfort.

    PubMed

    Coelho, Denis Alves; Dahlman, Sven

    2012-01-01

    This article reports on a pilot experimental study aimed at a first evaluation of the introduction of an articulation in the upper part of the seat backrest. The idea of introducing this articulation sprang from prevention of whiplash injuries and this study tentatively assesses its potential for improvement in comfort. This was done considering a pre-defined articulation height. A height for the articulation of 43.5 cm above the H-point of a reference seat was theoretically deduced based on a population with an average sitting height of 88 cm. Participants evaluated the articulated seat in comparison with the reference seat. Twelve participants were divided into three groups of sitting height. In a laboratory environment subjective comfort evaluations and preferred values of deployment of the articulation and of counter-tilting of the headrest were registered. Driving on the roads completed and validated the laboratory assessments. The reference seat was deemed less comfortable for the participants with short and medium sitting height than for the tall ones. There was a notable improvement in comfort for most of the medium and short sitting height participants when using the articulated seat. The articulation was fully deployed by most participants.

  14. How to Articulate: Requesting and Assessing Credit in the BC Transfer System

    ERIC Educational Resources Information Center

    Finlay, Finola

    2005-01-01

    The purpose of this handbook is to provide a resource for institutions, departments, faculty members, and articulation committees who are engaged in articulating courses and programs for credit within the British Columbia (BC) Transfer System. The handbook is based on best practices as observed and recorded by the British Columbia Council on…

  15. The Support of Student Articulation of Reasoning, Student Reflection and Tutor Feedback

    ERIC Educational Resources Information Center

    Garner, Stuart

    2007-01-01

    Learning theory suggests that student learning can be improved if students are required to articulate and reflect about work that they have done. This process helps students think more clearly about their work and such articulation also enables tutors to better assess student knowledge and mental models. There are various electronic tools…

  16. 2 (Secondary) + 2 (Postsecondary) Articulated Curriculum for Health Occupations: A How-To-Manual.

    ERIC Educational Resources Information Center

    Lovelace, Bill E.; And Others

    This manual addresses specific aspects of the development and implementation of articulated vocational programs between high schools and colleges. The approach presented in the manual was derived from research and the experiences of the Paris Junior College (Texas) project staff who developed a "2 + 2" articulated career ladder curriculum for…

  17. Articulation and Noncomprehension Signaling in Adolescent and Adult Males with Down Syndrome and Fragile X Syndrome

    ERIC Educational Resources Information Center

    Fedak, Larissa Ann

    2012-01-01

    The purpose of this study was to determine whether or not decreased articulation of speech played a role in the ability of an individual with Down syndrome or Fragile X syndrome to signal noncomprehension and whether the two groups differed in their levels of articulation of speech and noncomprehension signaling ability. The research was conducted…

  18. Articulation Rate and Its Relationship to Disfluency Type, Duration, and Temperament in Preschool Children Who Stutter

    ERIC Educational Resources Information Center

    Tumanova, Victoria; Zebrowski, Patricia M.; Throneburg, Rebecca N.; Kayikci, Mavis E. Kulak

    2011-01-01

    The purpose of this study was to examine the relationship between articulation rate, frequency and duration of disfluencies of different types, and temperament in preschool children who stutter (CWS). In spontaneous speech samples from 19 CWS (mean age = 3:9; years:months), we measured articulation rate, the frequency and duration of (a) sound…

  19. Children with Developmental Verbal Dyspraxia: Changes in Articulation and Perceived Resilience with Intensive Multimodal Intervention

    ERIC Educational Resources Information Center

    Martin, Maureen K; Wright, Lindsay Elizabeth; Perry, Susan; Cornett, Daphne; Schraeder, Missy; Johnson, James T.

    2016-01-01

    Research into intervention strategies for developmental verbal dyspraxia (DVD) clearly demonstrates the need to identify effective interventions. The goals of this study were to examine changes in articulation skills following the use of phonetic, multimodal intervention and to consider the relationship between these improved articulation skills…

  20. 49 CFR 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 5 2010-10-01 2010-10-01 false Farm vehicle drivers of articulated commercial... SAFETY REGULATIONS QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS Limited Exemptions § 391.67 Farm vehicle drivers of articulated commercial motor vehicles. The...

  1. 49 CFR 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 5 2013-10-01 2013-10-01 false Farm vehicle drivers of articulated commercial... SAFETY REGULATIONS QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS Limited Exemptions § 391.67 Farm vehicle drivers of articulated commercial motor vehicles. The...

  2. 49 CFR 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 5 2014-10-01 2014-10-01 false Farm vehicle drivers of articulated commercial... SAFETY REGULATIONS QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS Limited Exemptions § 391.67 Farm vehicle drivers of articulated commercial motor vehicles. The...

  3. 49 CFR 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 5 2011-10-01 2011-10-01 false Farm vehicle drivers of articulated commercial... SAFETY REGULATIONS QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS Limited Exemptions § 391.67 Farm vehicle drivers of articulated commercial motor vehicles. The...

  4. 49 CFR 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 5 2012-10-01 2012-10-01 false Farm vehicle drivers of articulated commercial... SAFETY REGULATIONS QUALIFICATIONS OF DRIVERS AND LONGER COMBINATION VEHICLE (LCV) DRIVER INSTRUCTORS Limited Exemptions § 391.67 Farm vehicle drivers of articulated commercial motor vehicles. The...

  5. An Ultrasonographic Investigation of Cleft-Type Compensatory Articulations of Voiceless Velar Stops

    ERIC Educational Resources Information Center

    Bressmann, Tim; Radovanovic, Bojana; Kulkarni, Gajanan V.; Klaiman, Paula; Fisher, David

    2011-01-01

    Ultrasound imaging was used to investigate the articulation of the voiceless velar stop [k] in five speakers with compensatory articulation related to cleft palate. The perceptual evaluation of the acoustic realization and the visual assessment of the tongue movement for the target sound were made by three examiners. The analysis revealed a…

  6. New York State Transfer and Articulation Association Standards and Guidelines Manual.

    ERIC Educational Resources Information Center

    New York State Transfer and Articulation Association, Rensselaer.

    Addressing policies and concerns related to transfer and articulation, this manual provides guidelines developed by the New York State Transfer and Articulation Association to assist college personnel in serving transfer students. An introduction describes the purpose, goals, and objectives of the Association; identifies the intended audience; and…

  7. The Articulation of Korean Coronal Obstruents: Data from Heritage Speakers and Second Language Learners

    ERIC Educational Resources Information Center

    Ko, Insung

    2013-01-01

    This study investigated where the consonantal constrictions take place when Korean coronal obstruents are articulated since there is disagreement over the place of articulation of these consonants. Unlike other studies in Korean phonetics, which focus on various acoustic features, the current study used static palatography (SPG) in the form of…

  8. Direct Magnitude Estimation of Articulation Rate in Boys with Fragile X Syndrome

    ERIC Educational Resources Information Center

    Zajac, David J.; Harris, Adrianne A.; Roberts, Joanne E.; Martin, Gary E.

    2009-01-01

    Purpose: To compare the perceived articulation rate of boys with fragile X syndrome (FXS) with that of chronologically age-matched (CA) boys and to determine segmental and/or prosodic factors that account for perceived rate. Method: Ten listeners used direct magnitude estimation procedures to judge the articulation rates of 7 boys with FXS only, 5…

  9. Changes in Articulator Movement Variability during Phonemic Development: A Longitudinal Study

    ERIC Educational Resources Information Center

    Grigos, Maria I.

    2009-01-01

    Purpose: The present study explored articulator movement variability during voicing contrast acquisition. The purpose was to examine whether oral articulator movement trajectories associated with the production of voiced/voiceless bilabial phonemes in children became less variable over time. Method: Jaw, lower lip, and upper lip movements were…

  10. Relationships between Speech Intelligibility and Word Articulation Scores in Children with Hearing Loss

    ERIC Educational Resources Information Center

    Ertmer, David J.

    2010-01-01

    Purpose: This investigation sought to determine whether scores from a commonly used word-based articulation test are closely associated with speech intelligibility in children with hearing loss. If the scores are closely related, articulation testing results might be used to estimate intelligibility. If not, the importance of direct assessment of…

  11. Articulator Movement Associated with the Development of Prosodic Control in Children

    ERIC Educational Resources Information Center

    Grigos, Maria I.; Patel, Rupal

    2007-01-01

    This study explored the relationship between articulator movement and prosody in children at different developmental ages. Jaw, lower lip, and upper lip kinematics were examined in 4-, 7-, and 11-year-old children as they produced the declarative and interrogative forms of utterances "Show Bob a bot" and "Show Pop a pot." Articulator movement…

  12. Effects of Articulation Styles on Perception of Modulated Tempos in Violin Excerpts

    ERIC Educational Resources Information Center

    Geringer, John M.; Madsen, Clifford K.; Macleod, Rebecca B.

    2007-01-01

    We investigated effects of legato, staccato and pizzicato articulation styles on the perception of modulated tempos. Seventy-two music majors served as participants. Two solo violin excerpts were chosen with contrasting rhythmic rates and were recorded in all three articulation styles. Examples were presented to listeners in three conditions of…

  13. Articulation and Transfer: How Successful Is It in Missouri and Maryland?

    ERIC Educational Resources Information Center

    Goff, Donald Gary

    This report examines the articulation and transfer policies of Maryland and Missouri and reviews the extent to which these guidelines provide for a seamless transition between community colleges and state universities. The author begins by defining the key concepts relevant to this study (e.g., transfer, articulation, native student, transfer…

  14. New Dental Accreditation Standard on Critical Thinking: A Call for Learning Models, Outcomes, Assessments.

    PubMed

    Johnsen, David C; Williams, John N; Baughman, Pauletta Gay; Roesch, Darren M; Feldman, Cecile A

    2015-10-01

    This opinion article applauds the recent introduction of a new dental accreditation standard addressing critical thinking and problem-solving, but expresses a need for additional means for dental schools to demonstrate they are meeting the new standard because articulated outcomes, learning models, and assessments of competence are still being developed. Validated, research-based learning models are needed to define reference points against which schools can design and assess the education they provide to their students. This article presents one possible learning model for this purpose and calls for national experts from within and outside dental education to develop models that will help schools define outcomes and assess performance in educating their students to become practitioners who are effective critical thinkers and problem-solvers.

  15. 42 CFR Appendix G to Part 75 - Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Dental Assistants in Dental Radiography G Appendix G to Part 75 Public Health PUBLIC HEALTH SERVICE...—Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography The following section... individual State licensure processes, all of which include assessment of competence in dental radiography....

  16. 42 CFR Appendix G to Part 75 - Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Dental Assistants in Dental Radiography G Appendix G to Part 75 Public Health PUBLIC HEALTH SERVICE...—Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography The following section... individual State licensure processes, all of which include assessment of competence in dental radiography....

  17. 42 CFR Appendix G to Part 75 - Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Dental Assistants in Dental Radiography G Appendix G to Part 75 Public Health PUBLIC HEALTH SERVICE...—Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography The following section... individual State licensure processes, all of which include assessment of competence in dental radiography....

  18. 42 CFR Appendix G to Part 75 - Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Dental Assistants in Dental Radiography G Appendix G to Part 75 Public Health PUBLIC HEALTH SERVICE...—Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography The following section... individual State licensure processes, all of which include assessment of competence in dental radiography....

  19. The (in)dependence of articulation and lexical planning during isolated word production

    PubMed Central

    Buz, Esteban; Jaeger, T. Florian

    2016-01-01

    The number of phonological neighbors to a word (PND) can affect its lexical planning and pronunciation. Similar parallel effects on planning and articulation have been observed for other lexical variables, such as a word’s contextual predictability. Such parallelism is frequently taken to indicate that effects on articulation are mediated by effects on the time course of lexical planning. We test this mediation assumption for PND and find it unsupported. In a picture naming experiment, we measure speech onset latencies (planning), word durations, and vowel dispersion (articulation). We find that PND predicts both latencies and durations. Further, latencies predict durations. However, the effects of PND and latency on duration are independent: parallel effects do not imply mediation. We discuss the consequences for accounts of lexical planning, articulation, and the link between them. In particular, our results suggest that ease of planning does not explain effects of PND on articulation. PMID:27376094

  20. Influence of dental materials on dental MRI

    PubMed Central

    Tymofiyeva, O; Vaegler, S; Rottner, K; Boldt, J; Hopfgartner, AJ; Proff, PC; Richter, E-J; Jakob, PM

    2013-01-01

    Objectives: To investigate the potential influence of standard dental materials on dental MRI (dMRI) by estimating the magnetic susceptibility with the help of the MRI-based geometric distortion method and to classify the materials from the standpoint of dMRI. Methods: A series of standard dental materials was studied on a 1.5 T MRI system using spin echo and gradient echo pulse sequences and their magnetic susceptibility was estimated using the geometric method. Measurements on samples of dental materials were supported by in vivo examples obtained in dedicated dMRI procedures. Results: The tested materials showed a range of distortion degrees. The following materials were classified as fully compatible materials that can be present even in the tooth of interest: the resin-based sealer AH Plus® (Dentsply, Maillefer, Germany), glass ionomer cement, gutta-percha, zirconium dioxide and composites from one of the tested manufacturers. Interestingly, composites provided by the other manufacturer caused relatively strong distortions and were therefore classified as compatible I, along with amalgam, gold alloy, gold–ceramic crowns, titanium alloy and NiTi orthodontic wires. Materials, the magnetic susceptibility of which differed from that of water by more than 200 ppm, were classified as non-compatible materials that should not be present in the patient’s mouth for any dMRI applications. They included stainless steel orthodontic appliances and CoCr. Conclusions: A classification of the materials that complies with the standard grouping of materials according to their magnetic susceptibility was proposed and adopted for the purposes of dMRI. The proposed classification can serve as a guideline in future dMRI research. PMID:23610088

  1. Concepts first, jargon second improves student articulation of understanding.

    PubMed

    McDonnell, Lisa; Barker, Megan K; Wieman, Carl

    2016-01-01

    In this experiment, students in a large undergraduate biology course were first exposed to the concepts without new technical vocabulary ("jargon") in a pre-class reading assignment. Their learning of the concepts and jargon was compared with that of an equivalent group of students in another section of the same course, whose pre-class reading presented both the jargon and concepts together in the traditional manner. Both groups had the same active-learning classes with the same instructor, and then completed the same post-test. Although the two groups performed the same on the multiple choice questions of the post-test, the group exposed to concepts first and jargon second included 1.5 times and 2.5 times more correct arguments on two free-response questions about the concepts. The correct use of jargon between the two groups was similar, with the exception of one jargon term that the control group used more often. These results suggest that modest instructional changes whereby new concepts are introduced in a concepts-first, jargon-second manner can increase student learning, as demonstrated by their ability to articulate their understanding of new concepts.

  2. Decoding of Covert Vowel Articulation Using Electroencephalography Cortical Currents

    PubMed Central

    Yoshimura, Natsue; Nishimoto, Atsushi; Belkacem, Abdelkader Nasreddine; Shin, Duk; Kambara, Hiroyuki; Hanakawa, Takashi; Koike, Yasuharu

    2016-01-01

    With the goal of providing assistive technology for the communication impaired, we proposed electroencephalography (EEG) cortical currents as a new approach for EEG-based brain-computer interface spellers. EEG cortical currents were estimated with a variational Bayesian method that uses functional magnetic resonance imaging (fMRI) data as a hierarchical prior. EEG and fMRI data were recorded from ten healthy participants during covert articulation of Japanese vowels /a/ and /i/, as well as during a no-imagery control task. Applying a sparse logistic regression (SLR) method to classify the three tasks, mean classification accuracy using EEG cortical currents was significantly higher than that using EEG sensor signals and was also comparable to accuracies in previous studies using electrocorticography. SLR weight analysis revealed vertices of EEG cortical currents that were highly contributive to classification for each participant, and the vertices showed discriminative time series signals according to the three tasks. Furthermore, functional connectivity analysis focusing on the highly contributive vertices revealed positive and negative correlations among areas related to speech processing. As the same findings were not observed using EEG sensor signals, our results demonstrate the potential utility of EEG cortical currents not only for engineering purposes such as brain-computer interfaces but also for neuroscientific purposes such as the identification of neural signaling related to language processing. PMID:27199638

  3. Haptic perception with an articulated, sensate robot hand

    SciTech Connect

    Stansfield, S.A.

    1990-03-01

    In this paper we present a series of haptic exploratory procedures, or EPs, implemented for a multi-fingered, articulated, sensate robot hand. These EPs are designed to extract specific tactile and kinesthetic information form an object via their purposive invocation by an intelligent robotic system. Taken together, they form and active robotic touch perception system to be used both in extracting information about the environment for internal representation and in acquiring grasps for manipulation. The haptic system presented utilizes and integrated robotic system consisting of PUMA 560 robot arm, a JPL/Stanford robot hand, with joint torque sensing in the fingers, a wrist force/torque sensor, and 256 element, spatially-resolved fingertip tactile array. We describe the EPs implemented for this system and provide experimental results which illustrate how they function and how the information which they extract may be used. In addition to the sensate hand and arm, the robot also contains structured-lighting vision and a Prolog-based reasoning system capable of grasp generation and object categorization. We present a set of simple tasks which show how both grasping and recognition may be enhanced by the addition of active touch perception. 34 refs., 23 figs.

  4. Vocal-tract filtering by lingual articulation in a parrot.

    PubMed

    Beckers, Gabriël J L; Nelson, Brian S; Suthers, Roderick A

    2004-09-07

    Human speech and bird vocalization are complex communicative behaviors with notable similarities in development and underlying mechanisms. However, there is an important difference between humans and birds in the way vocal complexity is generally produced. Human speech originates from independent modulatory actions of a sound source, e.g., the vibrating vocal folds, and an acoustic filter, formed by the resonances of the vocal tract (formants). Modulation in bird vocalization, in contrast, is thought to originate predominantly from the sound source, whereas the role of the resonance filter is only subsidiary in emphasizing the complex time-frequency patterns of the source (e.g., but see ). However, it has been suggested that, analogous to human speech production, tongue movements observed in parrot vocalizations modulate formant characteristics independently from the vocal source. As yet, direct evidence of such a causal relationship is lacking. In five Monk parakeets, Myiopsitta monachus, we replaced the vocal source, the syrinx, with a small speaker that generated a broad-band sound, and we measured the effects of tongue placement on the sound emitted from the beak. The results show that tongue movements cause significant frequency changes in two formants and cause amplitude changes in all four formants present between 0.5 and 10 kHz. We suggest that lingual articulation may thus in part explain the well-known ability of parrots to mimic human speech, and, even more intriguingly, may also underlie a speech-like formant system in natural parrot vocalizations.

  5. History of dental hygiene research.

    PubMed

    Bowen, Denise M

    2013-01-01

    Dental hygiene is defined as the science and practice of the recognition, treatment and prevention of oral diseases. The history of dental hygiene research is considered in the context of the development of the discipline and an emerging infrastructure. Research-related events supporting the growth and maturation of the profession are considered from the early years to the most recent. The benefits of preventive oral health services provided by dental hygienists have been supported by research, and the practice of dental hygiene has expanded as a result of research findings since its inception 100 years ago. Dental hygienists' engagement in research, however, did not begin until the 1960s as research associates or administrators, primarily with dental researchers as primary investigators. The Journal of Dental Hygiene (JDH) has provided information for dental hygiene practice since 1927, and has been the primary venue for dissemination of dental hygiene research since 1945. Graduate education in dental hygiene at the master's degree level and the work of early dental hygiene researchers led to the first conference on dental hygiene research in 1982. Over 30 years later, dental hygiene has established a meta-paradigm and defined conceptual models, built an initial infrastructure to support research endeavors and contributed much to the development of dental hygiene as a unique discipline. A doctoral degree in the discipline, continued theory-based research, initiatives to foster collaborations between dental hygiene and other researchers and enhanced capabilities to attract funding to support large scale studies are goals that must be attained through the efforts of future researchers to address the needs for additional development in the discipline of dental hygiene. Dental hygiene research supports the growing discipline and its value to society.

  6. Dental Implantology in U.S. Dental Schools.

    ERIC Educational Resources Information Center

    Bavitz, J. Bruce

    1990-01-01

    The results of a survey of 44 dental schools corroborate the belief that dental implantology is gaining widespread acceptance in U.S. dental schools. Currently, predoctoral students have limited clinical participation. Most programs have taken the position that clinical techniques are best taught within the existing specialties at a graduate…

  7. Bulimia and Anorexia Nervosa in Dental and Dental Hygiene Curricula.

    ERIC Educational Resources Information Center

    Gross, Karen B. W.; And Others

    1990-01-01

    Dentists and dental hygienists are in a unique position to identify an eating disorder patient from observed oral manifestations and to refer the patient for psychological therapy. The inclusion of information on general and oral complications of bulimia and anorexia nervosa in dental and dental hygiene curriculum was examined. (MLW)

  8. Panoramic Dental X-Ray

    MedlinePlus

    ... Physician Resources Professions Site Index A-Z Panoramic Dental X-ray Panoramic dental x-ray uses a ... Your e-mail address: Personal message (optional): Bees: Wax: Notice: RadiologyInfo respects your privacy. Information entered here ...

  9. Structural analysis of three space crane articulated-truss joint concepts

    NASA Technical Reports Server (NTRS)

    Wu, K. Chauncey; Sutter, Thomas R.

    1992-01-01

    Three space crane articulated truss joint concepts are studied to evaluate their static structural performance over a range of geometric design parameters. Emphasis is placed on maintaining the four longeron reference truss performance across the joint while allowing large angle articulation. A maximum positive articulation angle and the actuator length ratio required to reach the angle are computed for each concept as the design parameters are varied. Configurations with a maximum articulation angle less than 120 degrees or actuators requiring a length ratio over two are not considered. Tip rotation and lateral deflection of a truss beam with an articulated truss joint at the midspan are used to select a point design for each concept. Deflections for one point design are up to 40 percent higher than for the other two designs. Dynamic performance of the three point design is computed as a function of joint articulation angle. The two lowest frequencies of each point design are relatively insensitive to large variations in joint articulation angle. One point design has a higher maximum tip velocity for the emergency stop than the other designs.

  10. Cross-language differences of articulation rate and its transfer into Japanese as a second language.

    PubMed

    Amino, Kanae; Osanai, Takashi

    2015-04-01

    Recently, the articulation rate has been attracting attention in forensic speech investigation as an acoustic feature that varies across speakers, dialects, and languages. The present study investigates how cross-language differences in the articulation rate are transferred into Japanese as a second language. Participants were speakers of Japanese, Chinese, Korean, and Thai. They were recorded while they read a passage in their native language and in Japanese. Local and global articulation rates were calculated based on the number of syllables as well as the number of morae for Japanese speech. When we compared the articulation rate of the native languages, Japanese was the fastest, then Korean, Chinese, and Thai in that order. Also, a significant positive correlation was observed between the articulation rate of the native language and that of the second language. A gender difference was found in the articulation rate of some languages, with males speaking faster than females. The effect of age was limited to Thai speakers only. Accent discrimination and identification experiments were conducted and the results revealed that native and non-native accents could be correctly discriminated just by the articulation rate.

  11. Accurate recovery of articulator positions from acoustics: New conclusions based on human data

    SciTech Connect

    Hogden, J.; Lofqvist, A.; Gracco, V.; Zlokarnik, I.; Rubin, P.; Saltzman, E.

    1996-09-01

    Vocal tract models are often used to study the problem of mapping from the acoustic transfer function to the vocal tract area function (inverse mapping). Unfortunately, results based on vocal tract models are strongly affected by the assumptions underlying the models. In this study, the mapping from acoustics (digitized speech samples) to articulation (measurements of the positions of receiver coils placed on the tongue, jaw, and lips) is examined using human data from a single speaker: Simultaneous acoustic and articulator measurements made for vowel-to-vowel transitions, /g/ closures, and transitions into and out of /g/ closures. Articulator positions were measured using an EMMA system to track coils placed on the lips, jaw, and tongue. Using these data, look-up tables were created that allow articulator positions to be estimated from acoustic signals. On a data set not used for making look-up tables, correlations between estimated and actual coil positions of around 94{percent} and root-mean-squared errors around 2 mm are common for coils on the tongue. An error source evaluation shows that estimating articulator positions from quantized acoustics gives root-mean-squared errors that are typically less than 1 mm greater than the errors that would be obtained from quantizing the articulator positions themselves. This study agrees with and extends previous studies of human data by showing that for the data studied, speech acoustics can be used to accurately recover articulator positions. {copyright} {ital 1996 Acoustical Society of America.}

  12. The Primary Dental Care Workforce.

    ERIC Educational Resources Information Center

    Neenan, M. Elaine; And Others

    1993-01-01

    A study describes the characteristics of the current primary dental care workforce (dentists, hygienists, assistants), its distribution, and its delivery system in private and public sectors. Graduate dental school enrollments, trends in patient visits, employment patterns, state dental activities, and workforce issues related to health care…

  13. Dental ethics and emotional intelligence.

    PubMed

    Rosenblum, Alvin B; Wolf, Steve

    2014-01-01

    Dental ethics is often taught, viewed, and conducted as an intell enterprise, uninformed by other noncognitive factors. Emotional intelligence (EQ) is defined distinguished from the cognitive intelligence measured by Intelligence Quotient (IQ). This essay recommends more inclusion of emotional, noncognitive input to the ethical decision process in dental education and dental practice.

  14. Dental therapists: a global perspective.

    PubMed

    Nash, David A; Friedman, Jay W; Kardos, Thomas B; Kardos, Rosemary L; Schwarz, Eli; Satur, Julie; Berg, Darren G; Nasruddin, Jaafar; Mumghamba, Elifuraha G; Davenport, Elizabeth S; Nagel, Ron

    2008-04-01

    In 1921, New Zealand began training school dental nurses, subsequently deploying them throughout the country in school-based clinics providing basic dental care for children. The concept of training dental nurses, later to be designated dental therapists, was adopted by other countries as a means of improving access to care, particularly for children. This paper profiles six countries that utilise dental therapists, with a description of the training that therapists receive in these countries, and the context in which they practice. Based on available demographic information, it also updates the number of dental therapists practising globally, as well as the countries in which they practice. In several countries, dental therapy is now being integrated with dental hygiene in training and practice to create a new type of professional complementary to a dentist. Increasingly, dental therapists are permitted to treat adults as well as children. The paper also describes the status of a current initiative to introduce dental therapy to the United States. It concludes by suggesting that dental therapists can become valued members of the dental team throughout the world, helping to improve access to care and reducing existing disparities in oral health.

  15. Dental Assistant Specialist. (AFSC 98150).

    ERIC Educational Resources Information Center

    Eling, David R.

    This four-volume student text is designed for use by Air Force personnel enrolled in a self-study extension course for dental assistant specialists. Covered in the individual volumes are an introduction to dental services (the mission and organization of medical/dental service, career ladder progressions, medical readiness/wartime training, and…

  16. Dental Laboratory Technology Program Standards.

    ERIC Educational Resources Information Center

    Georgia Univ., Athens. Dept. of Vocational Education.

    This guide contains 45 program standards for the dental laboratory technology program conducted in technical institutes in Georgia. The dental laboratory technology program, either diploma or associate degree, is designed to ensure that students gain basic competence in the job skills needed for an entry-level employee in dental laboratory…

  17. The Future Dental Education Process.

    ERIC Educational Resources Information Center

    Hjorting-Hansen, Erik

    1996-01-01

    Directions for dental education are examined, with reference made to a number of recent background papers and an Institute of Medicine report on dental education in the United States. Greater integration with other health sciences, development of dental faculty teaching skills, and greater use of apprenticeships and continuing education are…

  18. Dental amalgam: An update

    PubMed Central

    Bharti, Ramesh; Wadhwani, Kulvinder Kaur; Tikku, Aseem Prakash; Chandra, Anil

    2010-01-01

    Dental amalgam has served as an excellent and versatile restorative material for many years, despite periods of controversy. The authors review its history, summarize the evidence with regard to its performance and offer predictions for the future of this material. The PubMed database was used initially; the reference list for dental amalgam featured 8641 articles and 13 publications dealing with recent advances in dental amalgam. A forward search was undertaken on selected articles and using some author names. For the present, amalgam should remain the material of choice for economic direct restoration of posterior teeth. When esthetic concerns are paramount, tooth-colored materials, placed meticulously, can provide an acceptable alternative. All alternative restorative materials and procedures, however, have certain limitations. PMID:21217947

  19. Dental pulp stem cells

    PubMed Central

    Ashri, Nahid Y.; Ajlan, Sumaiah A.; Aldahmash, Abdullah M.

    2015-01-01

    Inflammatory periodontal disease is a major cause of loss of tooth-supporting structures. Novel approaches for regeneration of periodontal apparatus is an area of intensive research. Periodontal tissue engineering implies the use of appropriate regenerative cells, delivered through a suitable scaffold, and guided through signaling molecules. Dental pulp stem cells have been used in an increasing number of studies in dental tissue engineering. Those cells show mesenchymal (stromal) stem cell-like properties including self-renewal and multilineage differentiation potentials, aside from their relative accessibility and pleasant handling properties. The purpose of this article is to review the biological principles of periodontal tissue engineering, along with the challenges facing the development of a consistent and clinically relevant tissue regeneration platform. This article includes an updated review on dental pulp stem cells and their applications in periodontal regeneration, in combination with different scaffolds and growth factors. PMID:26620980

  20. Very fast motion planning for highly dexterous-articulated robots

    NASA Technical Reports Server (NTRS)

    Challou, Daniel J.; Gini, Maria; Kumar, Vipin

    1994-01-01

    Due to the inherent danger of space exploration, the need for greater use of teleoperated and autonomous robotic systems in space-based applications has long been apparent. Autonomous and semi-autonomous robotic devices have been proposed for carrying out routine functions associated with scientific experiments aboard the shuttle and space station. Finally, research into the use of such devices for planetary exploration continues. To accomplish their assigned tasks, all such autonomous and semi-autonomous devices will require the ability to move themselves through space without hitting themselves or the objects which surround them. In space it is important to execute the necessary motions correctly when they are first attempted because repositioning is expensive in terms of both time and resources (e.g., fuel). Finally, such devices will have to function in a variety of different environments. Given these constraints, a means for fast motion planning to insure the correct movement of robotic devices would be ideal. Unfortunately, motion planning algorithms are rarely used in practice because of their computational complexity. Fast methods have been developed for detecting imminent collisions, but the more general problem of motion planning remains computationally intractable. However, in this paper we show how the use of multicomputers and appropriate parallel algorithms can substantially reduce the time required to synthesize paths for dexterous articulated robots with a large number of joints. We have developed a parallel formulation of the Randomized Path Planner proposed by Barraquand and Latombe. We have shown that our parallel formulation is capable of formulating plans in a few seconds or less on various parallel architectures including: the nCUBE2 multicomputer with up to 1024 processors (nCUBE2 is a registered trademark of the nCUBE corporation), and a network of workstations.

  1. Visibility of speech articulation enhances auditory phonetic convergence.

    PubMed

    Dias, James W; Rosenblum, Lawrence D

    2016-01-01

    Talkers automatically imitate aspects of perceived speech, a phenomenon known as phonetic convergence. Talkers have previously been found to converge to auditory and visual speech information. Furthermore, talkers converge more to the speech of a conversational partner who is seen and heard, relative to one who is just heard (Dias & Rosenblum Perception, 40, 1457-1466, 2011). A question raised by this finding is what visual information facilitates the enhancement effect. In the following experiments, we investigated the possible contributions of visible speech articulation to visual enhancement of phonetic convergence within the noninteractive context of a shadowing task. In Experiment 1, we examined the influence of the visibility of a talker on phonetic convergence when shadowing auditory speech either in the clear or in low-level auditory noise. The results suggest that visual speech can compensate for convergence that is reduced by auditory noise masking. Experiment 2 further established the visibility of articulatory mouth movements as being important to the visual enhancement of phonetic convergence. Furthermore, the word frequency and phonological neighborhood density characteristics of the words shadowed were found to significantly predict phonetic convergence in both experiments. Consistent with previous findings (e.g., Goldinger Psychological Review, 105, 251-279, 1998), phonetic convergence was greater when shadowing low-frequency words. Convergence was also found to be greater for low-density words, contrasting with previous predictions of the effect of phonological neighborhood density on auditory phonetic convergence (e.g., Pardo, Jordan, Mallari, Scanlon, & Lewandowski Journal of Memory and Language, 69, 183-195, 2013). Implications of the results for a gestural account of phonetic convergence are discussed.

  2. Deep water drilling and production Articulated Column - Water depth 350m

    SciTech Connect

    Baduel, F.; Figenschou, A.

    1985-01-01

    An Articulated Tower for drilling and production in the Norwegian Sea for 350m water depth is presented. Main features are: Christmas trees at the deck-level, 17,000 tonnes deck payload, limited motions, steel structure including main float and lattice, low stressed mechanical articulation with anti-torque device and controlled bending risers. The extensive study has considered in detail the behaviour in extreme conditions, the fatigue of main structural parts and risers, operating procedures, fabrication and installation. General results are given concerning behaviour, structural design, articulation, bending riser, fabrication and installation. A fabrication and installation schedule is also given.

  3. Performance of Dental Ceramics

    PubMed Central

    Rekow, E.D.; Silva, N.R.F.A.; Coelho, P.G.; Zhang, Y.; Guess, P.; Thompson, V.P.

    2011-01-01

    The clinical success of modern dental ceramics depends on an array of factors, ranging from initial physical properties of the material itself, to the fabrication and clinical procedures that inevitably damage these brittle materials, and the oral environment. Understanding the influence of these factors on clinical performance has engaged the dental, ceramics, and engineering communities alike. The objective of this review is to first summarize clinical, experimental, and analytic results reported in the recent literature. Additionally, it seeks to address how this new information adds insight into predictive test procedures and reveals challenges for future improvements. PMID:21224408

  4. Epilepsy in dental practice.

    PubMed

    Fitzpatrick, J J; McArdle, N S; Wilson, M H; Stassen, L F A

    2008-01-01

    Epilepsy is a neurological condition characterised by seizure activity. It has an approximate incidence of 1%. General dental practitioners will encounter these patients in practice. This article discusses the types of epilepsy, the medical management and considerations in dental management of epileptic patients. General recommendations are made, based on current evidence, with respect to prescribing of medications. The management of an epileptic seizure is discussed. Status epilepticus is a rare but serious complication of epileptic seizures. An easy-to-follow algorithm is provided to assist the practitioner in managing seizures.

  5. Review of Spaceflight Dental Emergencies

    NASA Technical Reports Server (NTRS)

    Menon, Anil

    2012-01-01

    All exploration class missions--extending beyond earth's orbit--differ from existing orbital missions by being of longer duration and often not having a means of evacuation. If an exploration mission extends beyond a year, then there will be a greater lapse since the crewmembers last terrestrial dental exams, which routinely occur each year. This increased time since professional dental care could increase the chance of a dental emergency such as intractable pain, dental decay requiring a temporary filling, crown replacement, exposed pulp, abscess, tooth avulsion, or toothache. Additionally, any dental emergency will have to be treated in-flight with available resources and personnel who may not have extensive training in dental care. Thus, dental emergencies are an important risk to assess in preparation for exploration missions.

  6. Drugs that promote dental caries.

    PubMed

    2015-02-01

    Dental caries result from erosion of tooth enamel or cementum by acidic substances produced by bacteria found in dental plaque. Caries can lead to pulp necrosis and tooth loss. Risk factors include certain dietary habits, poor oral hygiene, and dry mouth. Diabetes and Sjogren's syndrome can also promote dental caries. Psychotropic substances such as cocaine, methamphetamine, heroin and cannabis can promote dental caries. Many medicinal drugs facilitate the formation of dental caries, through various mechanisms; they include formulations with a high sugar content; drugs that cause dry mouth (especially antimuscarinics); drugs that lower the buccal pH (inhaled powders, etc.); and drugs that cause demineralisation (tetracyclines, etc.). In practice, patients (and parents) should be informed that some drugs can increase the risk of dental caries. They should be encouraged to adapt and reinforce dental hygiene, and advised to visit a dentist regularly.

  7. Modification of Hanau H-2 articulator to accept the earpiece face-bow.

    PubMed

    Kastner, C U

    1985-01-01

    A time-saving and economic method of fitting the centric lock with an auditory pin for older Hanau H-2 articulators was described. The entire process takes approximately 10 minutes when done by an experienced machinist.

  8. Direct and indirect measures of speech articulator motions using low power EM sensors

    SciTech Connect

    Barnes, T; Burnett, G; Gable, T; Holzrichter, J F; Ng, L

    1999-05-12

    Low power Electromagnetic (EM) Wave sensors can measure general properties of human speech articulator motions, as speech is produced. See Holzrichter, Burnett, Ng, and Lea, J.Acoust.Soc.Am. 103 (1) 622 (1998). Experiments have demonstrated extremely accurate pitch measurements (< 1 Hz per pitch cycle) and accurate onset of voiced speech. Recent measurements of pressure-induced tracheal motions enable very good spectra and amplitude estimates of a voiced excitation function. The use of the measured excitation functions and pitch synchronous processing enable the determination of each pitch cycle of an accurate transfer function and, indirectly, of the corresponding articulator motions. In addition, direct measurements have been made of EM wave reflections from articulator interfaces, including jaw, tongue, and palate, simultaneously with acoustic and glottal open/close signals. While several types of EM sensors are suitable for speech articulator measurements, the homodyne sensor has been found to provide good spatial and temporal resolution for several applications.

  9. Perceptual, durational and tongue displacement measures following articulation therapy for rhotic sound errors.

    PubMed

    Bressmann, Tim; Harper, Susan; Zhylich, Irina; Kulkarni, Gajanan V

    2016-01-01

    Outcomes of articulation therapy for rhotic errors are usually assessed perceptually. However, our understanding of associated changes of tongue movement is limited. This study described perceptual, durational and tongue displacement changes over 10 sessions of articulation therapy for /ɹ/ in six children. Four of the participants also received ultrasound biofeedback of their tongue shape. Speech and tongue movement were recorded pre-therapy, after 5 sessions, in the final session and at a one month follow-up. Perceptually, listeners perceived improvement and classified more productions as /ɹ/ in the final and follow-up assessments. The durations of VɹV syllables at the midway point of the therapy were longer. Cumulative tongue displacement increased in the final session. The average standard deviation was significantly higher in the middle and final assessments. The duration and tongue displacement measures illustrated how articulation therapy affected tongue movement and may be useful for outcomes research about articulation therapy.

  10. Performance of Children with Good and Poor Articulation on Tasks of Tongue Placement.

    ERIC Educational Resources Information Center

    Jordan, Linda Smith; And Others

    1978-01-01

    The study determined whether first grade children (nine with good and nine with poor articulation skills) could learn to replicate four positions of lingual-palatal contact with and without topical anesthesia that eliminated touch-pressure sensations. (Author)

  11. Dental Sealants Prevent Cavities

    MedlinePlus

    ... Obesity Prescription Drug Overdoses Teen Pregnancy Tobacco Other Digital Media Tools About Vital Signs Get Email Updates To receive email updates about this page, enter your email address: Enter Email Address What's this? Submit What's ... Kit Read the MMWR Science Clips Dental ...

  12. Smoking and dental implants

    PubMed Central

    Kasat, V.; Ladda, R.

    2012-01-01

    Smoking is a prevalent behaviour in the population. The aim of this review is to bring to light the effects of smoking on dental implants. These facts will assist dental professionals when implants are planned in tobacco users. A search of “PubMed” was made with the key words “dental implant,” “nicotine,” “smoking,” “tobacco,” and “osseointegration.” Also, publications on tobacco control by the Government of India were considered. For review, only those articles published from 1988 onward in English language were selected. Smoking has its influence on general as well as oral health of an individual. Tobacco negatively affects the outcome of almost all therapeutic procedures performed in the oral cavity. The failure rate of implant osseointegration is considerably higher among smokers, and maintenance of oral hygiene around the implants and the risk of peri-implantitis are adversely affected by smoking. To increase implant survival in smokers, various protocols have been recommended. Although osseointegrated dental implants have become the state of the art for tooth replacement, they are not without limitations or complications. In this litigious era, it is extremely important that the practitioner clearly understands and is able and willing to convey the spectrum of possible complications and their frequency to the patients. PMID:24478965

  13. FATIGUE OF DENTAL CERAMICS

    PubMed Central

    Zhang, Yu; Sailer, Irena; Lawn, Brian R

    2013-01-01

    Objectives Clinical data on survival rates reveal that all-ceramic dental prostheses are susceptible to fracture from repetitive occlusal loading. The objective of this review is to examine the underlying mechanisms of fatigue in current and future dental ceramics. Data/sources The nature of various fatigue modes is elucidated using fracture test data on ceramic layer specimens from the dental and biomechanics literature. Conclusions Failure modes can change over a lifetime, depending on restoration geometry, loading conditions and material properties. Modes that operate in single-cycle loading may be dominated by alternative modes in multi-cycle loading. While post-mortem examination of failed prostheses can determine the sources of certain fractures, the evolution of these fractures en route to failure remains poorly understood. Whereas it is commonly held that loss of load-bearing capacity of dental ceramics in repetitive loading is attributable to chemically-assisted 'slow crack growth' in the presence of water, we demonstrate the existence of more deleterious fatigue mechanisms, mechanical rather than chemical in nature. Neglecting to account for mechanical fatigue can lead to gross overestimates in predicted survival rates. Clinical significance Strategies for prolonging the clinical lifetimes of ceramic restorations are proposed based on a crack-containment philosophy. PMID:24135295

  14. Advances in dental materials.

    PubMed

    Fleming, Garry J P

    2014-05-01

    The dental market is replete with new resorative materials marketed on the basis of novel technological advances in materials chemistry, bonding capability or reduced operator time and/or technique sensitivity. This paper aims to consider advances in current materials, with an emphasis on their role in supporting contemporary clinical practice.

  15. American Dental Association

    MedlinePlus

    ... Dental Medicine: Balancing Our Compassion for Patients with Social Responsibility April 13, 2-3 p.m. (CT) ASDA DAT Week April 17-21 FACEBOOK LIVE: The Top Three Questions Patients Ask about Fluoride April 18, ... Social ADA Twitter ADA News Twitter ADA Facebook GKAS ...

  16. Clinical canine dental radiography.

    PubMed

    Bannon, Kristin M

    2013-05-01

    The purpose of this article is to provide small animal veterinarians in private practice a guideline for interpretation of the most common findings in canine intraoral radiology. Normal oral and dental anatomy is presented. A brief review of variations of normal, common periodontal and endodontic pathology findings and developmental anomalies is provided.

  17. Dental amalgam and mercury

    SciTech Connect

    Mackert, J.R. Jr. )

    1991-08-01

    This paper looks at the issues of the current amalgam controversy: the daily dose of mercury from amalgam, hypersensitivity to mercury, claims of adverse effects from amalgam mercury and alleged overnight 'cures.' In addition, the toxicity and allergenicity of the proposed alternative materials are examined with the same kind of scrutiny applied by the anti-amalgam group to dental amalgam. 100 references.

  18. Dental Optical Coherence Tomography

    PubMed Central

    Hsieh, Yao-Sheng; Ho, Yi-Ching; Lee, Shyh-Yuan; Chuang, Ching-Cheng; Tsai, Jui-che; Lin, Kun-Feng; Sun, Chia-Wei

    2013-01-01

    This review paper describes the applications of dental optical coherence tomography (OCT) in oral tissue images, caries, periodontal disease and oral cancer. The background of OCT, including basic theory, system setup, light sources, spatial resolution and system limitations, is provided. The comparisons between OCT and other clinical oral diagnostic methods are also discussed. PMID:23857261

  19. Financing Dental Education.

    ERIC Educational Resources Information Center

    Douglass, Chester; Fein, Rashi

    1995-01-01

    Analysis of the current status of and recent trends in dental school finances provides an overall financial description, documents trends in revenue and expenses, discusses student debt and its consequences, and presents alternatives for increasing revenues and decreasing expenses. The paper provides background for an Institute of Medicine study…

  20. Production and perception of legato, portato, and staccato articulation in saxophone playing

    PubMed Central

    Hofmann, Alex; Goebl, Werner

    2014-01-01

    This paper investigates the production and perception of different articulation techniques on the saxophone. In a production experiment, two melodies were recorded that required different effectors to play the tones (tongue-only actions, finger-only actions, combined tongue and finger actions) at three different tempi. A sensor saxophone reed was developed to monitor tongue-reed interactions during performance. In the slow tempo condition, combined tongue-finger actions showed improved timing, compared to the timing of the tongue alone. This observation supports the multiple timer hypothesis where the tongue's timekeeper benefits from a coupling to the timekeeper of the fingers. In the fast tempo condition, finger-only actions were less precise than tongue-only actions and timing precision of combined tongue-finger actions showed the higher timing variability, close to the level of finger-only actions. This suggests that the finger actions have a dominant influence on the overall timing of saxophone performance. In a listening experiment we investigated whether motor expertise in music performance influences the perception of articulation techniques in saxophone performance. Participants with different backgrounds in music making (saxophonists, musicians not playing the saxophone, and non-musicians) attended an AB-X listening test. They had to discriminate between saxophone phrases played with different articulation techniques (legato, portato, staccato). Participants across all three groups discriminated the sound of staccato articulation well from the sound of portato articulation and legato articulation. Errors occurred across all groups of listeners when legato articulation (no tonguing) and portato articulation (soft tonguing) had to be discriminated. Saxophonists' results were superior compared to the results of the other two groups, suggesting that expertise in saxophone playing facilitated the discrimination task. PMID:25076918

  1. Role of Bed Design and Head-of-Bed Articulation on Patient Migration.

    PubMed

    Davis, Kermit G; Kotowski, Susan E

    2015-01-01

    The ramifications of patient migration toward the foot of the bed in intensive care units are not well understood. Migration may cause shear and friction between the patient and the mattress, reduce elevation of the patient's torso, and require frequent repositioning of the patient. This study assesses how bed design impacts both the amount of migration that patients undergo during head section articulation to 30° and 45° and the extent of torso compression following the articulation.

  2. Role of Bed Design and Head-of-Bed Articulation on Patient Migration

    PubMed Central

    Davis, Kermit G.; Kotowski, Susan E.

    2015-01-01

    The ramifications of patient migration toward the foot of the bed in intensive care units are not well understood. Migration may cause shear and friction between the patient and the mattress, reduce elevation of the patient's torso, and require frequent repositioning of the patient. This study assesses how bed design impacts both the amount of migration that patients undergo during head section articulation to 30° and 45° and the extent of torso compression following the articulation. PMID:25723914

  3. 42 CFR Appendix G to Part 75 - Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 1 2010-10-01 2010-10-01 false Standards for Licensing Dental Hygienists and...—Standards for Licensing Dental Hygienists and Dental Assistants in Dental Radiography The following section... personnel who perform radiologic procedures. Currently, Dental Hygienists are credentialed...

  4. Dental anxiety and salivary cortisol levels before urgent dental care.

    PubMed

    Kanegane, Kazue; Penha, Sibele S; Munhoz, Carolina D; Rocha, Rodney G

    2009-12-01

    Dental anxiety is still prevalent, despite advances in treatment, and affects the utilization of health care services. The purpose of this cross-sectional study was to determine if patients with different degrees of dental anxiety and pain undergoing emergency dental care have different stress reactions as measured by salivary cortisol. Seventy three patients completed the modified dental anxiety scale (MDAS), and described any previous dental traumatic experience. Their socio-demographic characteristics were also recorded. They also rated pain intensity on a 100 mm visual analogue scale (VAS). A saliva sample was collected before the procedure, and analyzed by enzyme immunoassay. Thirty patients were dentally anxious and forty one complained of pain. In this sample, dental anxiety was not related to gender, age, educational level and family income; however, a previous traumatic event was related to dental anxiety. There was no association between salivary cortisol concentrations and gender or dental anxiety. Patients with pain showed higher cortisol levels. When gathering patient information, the dentist should note patients' negative dental experiences in order to provide more effective, less traumatic treatment.

  5. Articulation Committee Handbook: A Guide to the Mandate and Operations of Provincial Post-Secondary Articulation Committees in British Columbia. Third Edition.

    ERIC Educational Resources Information Center

    British Columbia Council on Admissions and Transfer, Vancouver.

    This handbook, created by the British Columbia Council on Admissions and Transfer (BCCAT), serves as a guide to individuals who serve on postsecondary articulation committees in British Columbia. The handbook is divided into four parts. Part A includes a chart detailing the major activities of BCCAT and a description of the membership, purpose,…

  6. 21 CFR 872.3240 - Dental bur.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... materials intended for use in the fabrication of dental devices. (b) Classification. Class I (general... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental bur. 872.3240 Section 872.3240 Food and... DENTAL DEVICES Prosthetic Devices § 872.3240 Dental bur. (a) Identification. A dental bur is a...

  7. Dental Health - Multiple Languages: MedlinePlus

    MedlinePlus

    ... 繁體中文 (Chinese - Traditional) PDF California Dental Association Dental Tourism English 牙科旅行 - 繁體中文 (Chinese - Traditional) PDF California Dental ... NEEG MOB - Hmoob (Hmong) California Dental Association Dental Tourism English Kev Kho Hniav Txawv Teb Chaws - Hmoob ( ...

  8. Allied Dental Education: Past, Present, and Future.

    ERIC Educational Resources Information Center

    DeVore, Linda Rubinstein

    1993-01-01

    A discussion of the status of the three allied dental disciplines (dental assisting, dental technology, and dental hygiene) gives a historical overview on allied dental programs, assesses their current status and enrollment trends, identifies critical issues affecting educational programs, and outlines a framework for innovation in recruitment and…

  9. Prevalence of Dental Fear and Anxiety amongst Patients in Selected Dental Clinics in Ghana

    ERIC Educational Resources Information Center

    Ofori, Marian A.; Adu-Ababio, F.; Nyako, E. A.; Ndanu, Tom A.

    2009-01-01

    Objective: To find out the prevalence of dental anxiety and fear amongst patients in various selected dental clinics in Accra, Ghana. Study design: Dental patients (n = 279) who had either been exposed to dental treatments or had no prior dental exposure, attending four selected dental clinics in Accra were randomly sampled. They were interviewed…

  10. [Dental education in Germany: new concepts for the dental curriculum].

    PubMed

    Hugger, A; Hugger, S; Kordass, B

    2011-09-01

    In Germany, the dental curriculum is still based on dental licensing regulations ("Approbations-/Prüfungsordnung für Zahnärzte") from 1955. Essential changes of the dental licensing regulations have not been made for over 50 years-unlike the medical licensing regulations in Germany. Teaching and learning concepts have, nevertheless, changed considerably in medical and dental education over time. The present study delivers an analysis about reform initiatives in dental education in Germany and introduces examples of innovative projects. To be able to establish long-term and broad reforms in dental education, new licensing regulations for dentists are required. This should create a contemporary framework for education, which assigns resources and enables occupational profile development at specific locations. Thereby, compatibility with the medical curriculum has to be guaranteed just as required adaptations of admission and curricular capacity regulations for dentistry.

  11. Dental therapists in general dental practices: an economic evaluation.

    PubMed

    Beazoglou, Tryfon J; Lazar, Vickie F; Guay, Albert H; Heffley, Dennis R; Bailit, Howard L

    2012-08-01

    Dental access disparities are well documented and have been recognized as a national problem. Their major cause is the lack of reasonable Medicaid reimbursement rates for the underserved. Specifically, Medicaid reimbursement rates for children average 40 percent below market rates. In addition, most state Medicaid programs do not cover adults. To address these issues, advocates of better oral health for the underserved are considering support for a new allied provider--a dental therapist--capable of providing services at a lower cost per service and in low-income and rural areas. Using a standard economic analysis, this study estimated the potential cost, price, utilization, and dentist's income effects of dental therapists employed in general dental practices. The analysis is based on national general dental practice data and the broadest scope of responsibility for dental therapists that their advocates have advanced, including the ability to provide restorations and extractions to adults and children, training for three years, and minimum supervision. Assuming dental therapists provide restorative, extraction, and pulpal services to patients of all ages and dental hygienists continue to deliver all hygiene services, the mean reduction in a general practice costs ranges between 1.57 and 2.36 percent. For dental therapists treating children only, the range is 0.31 to 0.47 percent. The effects on price and utilization are even smaller. In addition, the effects on most dentists' gross income, hours of work, and net income are negative. The estimated economic impact of dental therapists in the United States on private dental practice is very limited; therefore, the demand for dental therapists by private practices also would probably be very limited.

  12. Dental-service Dental Radiation Safety and Protection: Program guide

    SciTech Connect

    Not Available

    1991-08-27

    The primary purpose of the program guide for Dental Radiation Safety and Protection is to assist VA dental personnel in developing radiologic procedures that ensure maximum safety for their patients and themselves. In order to do this, the authors have included a summary of the biological hazards associated with exposure to x-radiation, provided information on patient exposure levels associated with dental X-ray units, and explained the methods for reducing patient and staff exposure to X-rays.

  13. Sparse appearance model-based algorithm for automatic segmentation and identification of articulated hand bones

    NASA Astrophysics Data System (ADS)

    Reda, Fitsum A.; Peng, Zhigang; Liao, Shu; Shinagawa, Yoshihisa; Zhan, Yiqiang; Hermosillo, Gerardo; Zhou, Xiang Sean

    2014-03-01

    Automatic and precise segmentation of hand bones is important for many medical imaging applications. Although several previous studies address bone segmentation, automatically segmenting articulated hand bones remains a challenging task. The highly articulated nature of hand bones limits the effectiveness of atlas-based segmentation methods. The use of low-level information derived from the image-of-interest alone is insufficient for detecting bones and distinguishing boundaries of different bones that are in close proximity to each other. In this study, we propose a method that combines an articulated statistical shape model and a local exemplar-based appearance model for automatically segmenting hand bones in CT. Our approach is to perform a hierarchical articulated shape deformation that is driven by a set of local exemplar-based appearance models. Specifically, for each point in the shape model, the local appearance model is described by a set of profiles of low-level image features along the normal of the shape. During segmentation, each point in the shape model is deformed to a new point whose image features are closest to the appearance model. The shape model is also constrained by an articulation model described by a set of pre-determined landmarks on the finger joints. In this way, the deformation is robust to sporadic false bony edges and is able to fit fingers with large articulations. We validated our method on 23 CT scans and we have a segmentation success rate of ~89.70 %. This result indicates that our method is viable for automatic segmentation of articulated hand bones in conventional CT.

  14. Modeling and analysis of an articulated winged micro air vehicle for gust mitigation

    NASA Astrophysics Data System (ADS)

    Oduyela, Adetunji Y.

    Articulated micro air vehicles are a class of micro air vehicles comprised of a main center body attached to outer wings on both sides. As in the case of a single rigid micro air vehicle, the center body and the attached bodies in the articulated case are all responsible for the generation of aerodynamic forces and moments during flight resulting in a multibody system. While many approaches have been taken in the literature to model the system of equations resulting from such a complicated multibody system, this dissertation presents an approach based on a Newton-Euler multibody dynamics formulation where the multiple bodies are attached together with suitable joints. The number and type of joints determines the level of articulation and total degree of freedom for the entire system. Unlike most articulated air vehicle model formulations available in the literature, the final model formulation presented in this work provides joint force and moment data acting on the articulated MAV during flight. This feature allows such information to be available during the vehicle design and development stage where appropriate spring and dampers for the system are selected based on mission requirements. Experimental validation of the proposed mathematical model using experimental flight test data obtained from UAHuntsville's Autonomous Tracking and Optical Measurements laboratory allowed the comparison of the flight test results and model simulations. Analytical investigation of the gust alleviation properties of the articulated 8 degree-of-freedom micro air vehicle model was carried out using simulations with varying crosswind gust magnitudes and shows that the passive articulation in micro air vehicles increases their robustness to gusts when suitable joint parameters are selected.

  15. [Phenomenon of dental fear].

    PubMed

    Moore, R; Birn, H

    1990-01-01

    Odontophobia is a rather unique phobia with special psychosomatic components that impact on the dental health of odontophobic persons. It also has psychosocial components largely as a result of destruction of the teeth and subsequent embarrassment that can affect a person and cause a vicious cycle of dental fear. The phenomenon is facilitated by misunderstandings and myths generated by both patients and dentists. The most common reasons given in the literature for such strong fears of dental treatment are: 1) bad experiences in childhood for 85% of cases, 2) feeling of powerlessness and lack of control over personal emotional reactions and over the social situation in the dental chair, 3) social learning processes in which the image of the dentist is cast in a negative light by the mass media or by the person's relatives or friends and 4) that the person has other psychologic problems (in 20% of cases), such as serious phobias and/or neuroses. A strategy of researching and thus tackling the problem is presented which focuses on three essential targets that require studying and change: 1) the community at large and their image of the dentist, 2) the patient role and 3) the dentist role. Various model projects are presented along with their diagnostic systems. These are seen to focus in varying degrees on different elements of the target groups that effect the dentist-patient relationship but the need to come out into the community and make the social environment right for these patients is an important factor in all strategies.(ABSTRACT TRUNCATED AT 250 WORDS)

  16. Syllabus of Dental Materials

    DTIC Science & Technology

    1984-07-01

    or orthodontic bands. When a cold mixing slab (7 to 210 C) is used, more powder will be incorporated into the liquid and the set of the cement...over the mechanism of action of eugenol upon the dental pulp . Brannstrom and Nyborg (8) have demonstrated that eugenol may have little direct...AND LINERS--WOOLSEY 35 pulp , but may actually kill bacteria in the dentinal tubules and eliminate the source of pulpal irritation which renders the

  17. Dental Assisting Education in California.

    ERIC Educational Resources Information Center

    California State Dept. of Education, Sacramento. Bureau of Industrial Education.

    A survey of 22 dental assisting programs showed an average of 1,124 hours of instruction in dental assisting for 15 four-semester, 955 for three three-semester, and 1,042 for four two-semester programs. The average instructional hours for the four-semester programs were 48 in introduction to dental assisting, 179 in the life sciences, 221 in the…

  18. Scan-based volume animation driven by locally adaptive articulated registrations.

    PubMed

    Rhee, Taehyun; Lewis, J P; Neumann, Ulrich; Nayak, Krishna S

    2011-03-01

    This paper describes a complete system to create anatomically accurate example-based volume deformation and animation of articulated body regions, starting from multiple in vivo volume scans of a specific individual. In order to solve the correspondence problem across volume scans, a template volume is registered to each sample. The wide range of pose variations is first approximated by volume blend deformation (VBD), providing proper initialization of the articulated subject in different poses. A novel registration method is presented to efficiently reduce the computation cost while avoiding strong local minima inherent in complex articulated body volume registration. The algorithm highly constrains the degrees of freedom and search space involved in the nonlinear optimization, using hierarchical volume structures and locally constrained deformation based on the biharmonic clamped spline. Our registration step establishes a correspondence across scans, allowing a data-driven deformation approach in the volume domain. The results provide an occlusion-free person-specific 3D human body model, asymptotically accurate inner tissue deformations, and realistic volume animation of articulated movements driven by standard joint control estimated from the actual skeleton. Our approach also addresses the practical issues arising in using scans from living subjects. The robustness of our algorithms is tested by their applications on the hand, probably the most complex articulated region in the body, and the knee, a frequent subject area for medical imaging due to injuries.

  19. In-Flight Position Calibration of the Cassini Articulated Reaction Wheel Assembly

    NASA Technical Reports Server (NTRS)

    Brown, Todd S.

    2012-01-01

    NASA's long-lived Cassini-Huygens spacecraft is currently in its 14th year of flight and in the midst of its second, and final, extended mission. Cassini is a massive interplanetary spacecraft that is three axis stabilized and can maintain attitude control using either its reaction control system thrusters or using reaction wheel control. Cassini has four identical reaction wheels, of which three are mutually orthogonal and have a fixed orientation. The fourth reaction wheel has an articulation motor that allows this reaction wheel to be aligned with the momentum direction of any of the other three fixed reaction wheels. The articulation motor allows this reaction wheel to be used as a replacement for any of the other three wheels without any performance degradation. However, due to limitations in the design of this backup system, there are few telemetric indications of the orientation of this reaction wheel following an articulation. This investigation serves to outline the procedures that have been developed by the Cassini Attitude and Articulation Control Subsystem to calibrate the position of the articulated reaction wheel assembly in the event that the momentum direction of this reaction wheel must be reoriented.

  20. Articulator movement associated with the development of prosodic control in children.

    PubMed

    Grigos, Maria I; Patel, Rupal

    2007-02-01

    This study explored the relationship between articulator movement and prosody in children at different developmental ages. Jaw, lower lip, and upper lip kinematics were examined in 4-, 7-, and 11-year-old children as they produced the declarative and interrogative forms of utterances "Show Bob a bot" and "Show Pop a pot." Articulator movement differences were found between declaratives and interrogatives during the production of vowel and consonant targets. The 7- and 11-year-olds differentiated the duration and displacement of their articulator movements to distinguish between declaratives and interrogatives. Several age-related differences in movement duration between the 4-year-olds and the older participants were associated with the production of these targets. Productions of declaratives and interrogatives were not associated with any significant differences in articulator movement variability, although variability did decrease significantly with maturation. The results suggest that children modify their articulator movements to meet the prosodic and linguistic demands of the task. While 4-year-olds appear to be able to modify lip and jaw movement to mark the declarative-interrogative contrast, refinement of these movements continues throughout childhood.

  1. Allied dental personnel: will there be enough?

    PubMed

    Waldman, H Barry; Perlman, Steven P

    2008-11-01

    The escalating number and size of dental practices mean greater dependency on a ready supply of allied dental personnel. However, despite the increasing number of entry places in allied dental training programs, many places remain unfilled and large numbers of individuals do not complete the course of studies. A review of the changes in dental practice sizes and dental assistant, dental hygienist and dental laboratory technician programs raises concerns as to whether there will be enough allied dental personnel to meet the future needs of the profession. The need for increasing attention to this potential eventuality is stressed.

  2. Priorities for future innovation, research, and advocacy in dental restorative materials.

    PubMed

    Watson, T; Fox, C H; Rekow, E D

    2013-11-01

    Innovations in materials science, both within and outside of dentistry, open opportunities for the development of exciting direct restorative materials. From rich dialog among experts from dental and non-dental academic institutions and industry, as well as those from policy, research funding, and professional organizations, we learned that capitalizing on these opportunities is multifactorial and far from straightforward. Beginning from the point when a restoration is needed, what materials, delivery systems, and skills are needed to best serve the most people throughout the world's widely varied economic and infrastructure systems? New research is a critical element in progress. Effective advocacy can influence funding and drives change in practice and policy. Here we articulate both research and advocacy priorities, with the intention of focusing the energy and expertise of our best scientists on making a difference, bringing new innovations to improve oral health.

  3. A Log-Euclidean polyaffine registration for articulated structures in medical images.

    PubMed

    Martín-Fernández, Miguel Angel; Martín-Fernández, Marcos; Alberola-López, Carlos

    2009-01-01

    In this paper we generalize the Log-Euclidean polyaffine registration framework of Arsigny et al. to deal with articulated structures. This framework has very useful properties as it guarantees the invertibility of smooth geometric transformations. In articulated registration a skeleton model is defined for rigid structures such as bones. The final transformation is affine for the bones and elastic for other tissues in the image. We extend the Arsigny el al.'s method to deal with locally-affine registration of pairs of wires. This enables the possibility of using this registration framework to deal with articulated structures. In this context, the design of the weighting functions, which merge the affine transformations defined for each pair of wires, has a great impact not only on the final result of the registration algorithm, but also on the invertibility of the global elastic transformation. Several experiments, using both synthetic images and hand radiographs, are also presented.

  4. Joint preservation of the wrist using articulated distraction arthroplasty: a case report of a novel technique.

    PubMed

    Fletcher, Matt D A

    2015-01-01

    Distraction arthroplasty of the ankle, elbow, and hip has become widely accepted and used within the orthopaedic community with excellent initial results which appear sustained. To date it has not been applied to the wrist in the same manner. A novel technique, drawn upon past success of articulated ankle distraction and static wrist distraction, was devised and evaluated by application of articulated wrist distraction performed over a 12-week period in a patient with poor functional outcome following limited wrist fusion. Posttreatment results showed improvement in range of motion (100-degree arc), subjective pain, and functional outcome measures (DASH 21.7, Mayo Wrist Score 80) comparable or better than either limited wrist fusion or proximal row carpectomy. Articulated wrist distraction initially appears to be a promising therapeutic option for the management of the stiff and painful wrist to maintain maximal function for which formal wrist arthrodesis may be the only alternative.

  5. Comparison of mechanical properties of silicone and PVC (polyvinylchloride) cosmetic gloves for articulating hand prostheses.

    PubMed

    Smit, Gerwin; Plettenburg, Dick H

    2013-01-01

    Current articulating electric and body-powered hands have a lower pinch force (15-34 N) than electric hands with stiff fingers (55-100 N). The cosmetic glove, which covers a hand prosthesis, negatively affects the mechanical efficiency of a prosthesis. The goal of this study is to mechanically compare polyvinylchloride (PVC) and silicone cosmetic gloves and quantify the stiffness of the finger joints, the required actuation energy, and the energy dissipation during joint articulation. Six cosmetic gloves, identical in size but made from different materials, were mechanically tested: three PVC and three silicone. The silicone gloves required less work and dissipated less energy during flexing. They also had a lower joint stiffness and required a lower maximum joint torque. Based on energy requirements, joint stiffness, and required joint torque, the tested silicone glove is most suitable for application on an articulating hand prosthesis.

  6. Development of a Wave Energy -Responsive Self-Actuated Blade Articulation Mechanism for an OWC Turbine

    SciTech Connect

    Francis A. Di Bella

    2010-06-01

    The Phase I SBIR effort completed the feasibility design, fabrication, and wind tunnel testing of a self-actuated blade articulation mechanism that uses a torsion bar and a lightweight airfoil to affect the articulation of the Wells airfoil. The articulation is affected only by the air stream incident on the airfoil. The self-actuating blade eliminates the complex and costly linkage mechanism that is now needed to perform this function on either a variable pitch Wells-type or Dennis-Auld air turbine. Using the results reported by independent researchers, the projected improvement in the Wells-type turbine efficiency is 20-40%, in addition to an increase in the operating air flow range by 50-100%, therefore enabling a smaller or slower single turbine to be used.

  7. Adaptation of an articulated fetal skeleton model to three-dimensional fetal image data

    NASA Astrophysics Data System (ADS)

    Klinder, Tobias; Wendland, Hannes; Wachter-Stehle, Irina; Roundhill, David; Lorenz, Cristian

    2015-03-01

    The automatic interpretation of three-dimensional fetal images poses specific challenges compared to other three-dimensional diagnostic data, especially since the orientation of the fetus in the uterus and the position of the extremities is highly variable. In this paper, we present a comprehensive articulated model of the fetal skeleton and the adaptation of the articulation for pose estimation in three-dimensional fetal images. The model is composed out of rigid bodies where the articulations are represented as rigid body transformations. Given a set of target landmarks, the model constellation can be estimated by optimization of the pose parameters. Experiments are carried out on 3D fetal MRI data yielding an average error per case of 12.03+/-3.36 mm between target and estimated landmark positions.

  8. Competency in Allied Dental Education.

    ERIC Educational Resources Information Center

    Beemsterboer, P. L.

    1994-01-01

    Implications of competency-based education for dental assistants and hygienists are examined. Such an approach would provide assistance in defining evolving roles in delivery of dental care; help in defining national competencies and analyzing appropriateness of current care; and a mechanism for developing curriculum that responds to community…

  9. Dental Assisting Competencies. Final Report.

    ERIC Educational Resources Information Center

    Richards, Beverly; And Others

    This document contains dental assisting competencies and competency-based performance objectives, learning activities, resources, and evaluation procedures for each competency that was adapted and developed by instructors of dental assisting to suit the needs and legal parameters of Pennsylvania. The competencies and associated elements are…

  10. Clinical Guidelines. Dental Hygiene Program.

    ERIC Educational Resources Information Center

    Branson, Bonnie

    This manual contains information concerning the policies and procedures of the Southern Illinois University-Carbondale Dental Hygiene Clinic. The manual is presented in a question/answer format for the information and convenience of dental hygiene students in the program, and is intended to answer their questions concerning clinical policies and…

  11. Medical screenings in dental settings.

    PubMed

    Bowen, Denise M

    2012-01-01

    The purpose of Linking Research to Clinical Practice is to present evidence based information to clinical dental hygienists so that they can make informed decisions regarding patient treatment and recommendations. Each issue will feature a different topic area of importance to clinical dental hygienists with A BOTTOM LINE to translate the research findings into clinical application.

  12. Dentistry and Dental Hygiene Handbook.

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany. Office of the Professions.

    A reference guide to laws, rules, and regulations that govern dentistry and dental hygiene practice in New York State is presented. In addition to identifying licensing requirements/procedures for dentists and dental hygienists, general provisions of Title VIII of the Education Law are covered, along with state management, professional misconduct,…

  13. Dentistry and Dental Hygiene Handbook.

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany. Office of the Professions.

    The handbook contains laws, rules, and regulations of the New York State Education Department that govern dentistry and dental hygiene practice in the state. It describes licensure requirements and includes complete application forms and instructions for obtaining license and first registration as a dentist and dental hygienist. Applicants are…

  14. Music interventions for dental anxiety.

    PubMed

    Bradt, J; Teague, A

    2016-11-25

    Anxiety is a significant issue in the dental care of adults and children. Dental anxiety often leads to avoidance of dental care which may result in significant deterioration of oral and dental health. Non-pharmacological anxiety management interventions such as music listening are increasingly used in dental care. Although efficacy for music's anxiolytic effects has been established for pre-operative anxiety, findings regarding the use of music listening for dental anxiety are inconclusive, especially for children. The use of music for passive distraction may not be adequate for children and highly anxious adults. Instead, interventions offered by a trained music therapist may be needed to optimize music's anxiolytic impact. Music therapy interventions are individualized to the patient's presenting needs and geared at enhancing patients' active engagement in the management of their anxiety. Interventions may include (i) active refocusing of attention, (ii) music-guided deep breathing, (iii) music-assisted relaxation, and (iv) music-guided imagery. In addition, music therapists can teach patients music-based anxiety management skills prior to dental treatments, offer them the opportunity to express emotions related to the upcoming procedure, and help them gain a sense of control and safety. Clinical guidelines for the use of music listening by dental practitioners are offered.

  15. Dental Laboratory Technology Program Guide.

    ERIC Educational Resources Information Center

    Georgia Univ., Athens. Dept. of Vocational Education.

    This program guide contains the standard dental laboratory technology curriculum for both diploma programs and associate degree programs in technical institutes in Georgia. The curriculum encompasses the minimum competencies required for entry-level workers in the dental laboratory technology field. The general information section contains the…

  16. Dental problems in epileptic patients.

    PubMed

    Zioło, Anna; Mielnik-Błaszczak, Maria

    2004-01-01

    On the grounds of literature and own clinical experience, pathological changes in epilepitic patients have been described. Dental management procedures in these patients have also been presented. The unquestionable importance of prophylaxis, which may markedly minimize the impact of epilepsy on the incidence of mouth diseases, has been emphasised. It has also been stated that epileptic patients should receive specialised and integrated dental treatment.

  17. Dosimetric considerations in dental applications

    NASA Technical Reports Server (NTRS)

    Goble, J. C.

    1978-01-01

    The integration of the Lixiscope into dental procedures was studied and compared with conventional dental radiographic techniques. It was found that through the use of intraoral sealed sources in conjunction with microchannel plate technology, the Lixiscope gives increased diagnostic information with decreased radiation dosage.

  18. Dental Chairside Technique. Student's Manual.

    ERIC Educational Resources Information Center

    Apfel, Maura; Weaver, Trudy Karlene

    This manual is part of a series dealing with skills and information needed by students in dental assisting. The individualized student materials are suitable for classroom, laboratory, or cooperative training programs. This student manual contains four units covering the following topics: local anesthesia; dental office emergencies; oral hygiene;…

  19. Chemical intensification of dental radiographs

    SciTech Connect

    Price, C.

    1983-04-01

    The potential applications of chemical intensification in dental radiography are explored. Three standard photographic intensifiers and three methods designed for radiographic use are evaluated. One of these methods is shown to be capable of reducing radiation dose to one half, without loss of diagnostic quality. Further work is necessary to achieve a system sufficiently practicable to deserve widespread use in routine clinical dental radiography.

  20. Health Instruction Packages: Dental Assisting.

    ERIC Educational Resources Information Center

    McEnery, Paula

    Text, illustrations, and exercises are utilized in this set of four learning modules to instruct dental assisting students in various office skills. The first module, "Dental Office Telephone Techniques," examines the qualities of a good telephone voice and demeanor and provides guidelines for taking a message and handling various…

  1. Inner speech in anarthria: neuropsychological evidence of differential effects of cerebral lesions on subvocal articulation.

    PubMed

    Cubelli, R; Nichelli, P

    1992-07-01

    The role of articulation in verbal short-term memory was investigated in two anarthric patients, C.M. and F.C., both showing normal comprehension for written and spoken language, above average intelligence and visuo-spatial abilities. Based on experimental results, we propose that subvocal articulation might be impaired in anarthric patients in different ways, according to the site of lesion: in 'locked-in' patients only the articulatory rehearsal processes necessary to enhance memory performances is involved, while in cortical anarthric patients the lesion affects the articulatory recoding processes involved in transferring visually presented material into an articulatory form for better retention.

  2. Interdisciplinary approach for esthetic management of an adult patient with reverse articulation.

    PubMed

    Bidra, Avinash S; Uribe, Flavio; Askalsky, Alexander

    2011-01-01

    Prosthodontic methods to correct anterior reverse articulation (also known as anterior cross-bite) can be extremely challenging. This clinical report describes the interdisciplinary management of an adult female patient with a history of chronic periodontitis who presented with reverse articulation in the left canine region. While the patient desired a quick, highly esthetic solution, she was counseled to first undergo orthodontic treatment. After completion of orthodontics, prosthodontic treatment comprised of bleaching therapy, porcelain veneers, and all-ceramic crowns. Periodontal maintenance therapy was also performed during the treatment period. The case portrays the significance of interdisciplinary care and discusses the importance of close communication among specialties.

  3. Tribology considerations for hip joint articulations in relation to the "new orthopaedic patient".

    PubMed

    Rieker, C B

    2006-01-01

    The purpose of this review is to examine alternative bearings used in total hip arthroplasty (THA) and discuss the specific tribologic needs of the "New Orthopaedic Patient". As orthopaedic patients today are younger and more active, there is a clear need for hip joint implants and articulations minimising the amount of wear and guarantying better stability. Recent modern developments in tribology with highly cross-linked polyethylenes and hard-on-hard bearings allow the safe and effective use of larger diameter articulations in THA.

  4. Nanotechnology for dental implants.

    PubMed

    Tomsia, Antoni P; Lee, Janice S; Wegst, Ulrike G K; Saiz, Eduardo

    2013-01-01

    With the advent of nanotechnology, an opportunity exists for the engineering of new dental implant materials. Metallic dental implants have been successfully used for decades, but they have shortcomings related to osseointegration and mechanical properties that do not match those of bone. Absent the development of an entirely new class of materials, faster osseointegration of currently available dental implants can be accomplished by various surface modifications. To date, there is no consensus regarding the preferred method(s) of implant surface modification, and further development will be required before the ideal implant surface can be created, let alone become available for clinical use. Current approaches can generally be categorized into three areas: ceramic coatings, surface functionalization, and patterning on the micro- to nanoscale. The distinctions among these are imprecise, as some or all of these approaches can be combined to improve in vivo implant performance. These surface improvements have resulted in durable implants with a high percentage of success and long-term function. Nanotechnology has provided another set of opportunities for the manipulation of implant surfaces in its capacity to mimic the surface topography formed by extracellular matrix components of natural tissue. The possibilities introduced by nanotechnology now permit the tailoring of implant chemistry and structure with an unprecedented degree of control. For the first time, tools are available that can be used to manipulate the physicochemical environment and monitor key cellular events at the molecular level. These new tools and capabilities will result in faster bone formation, reduced healing time, and rapid recovery to function.

  5. Current trends in dental implants

    PubMed Central

    Gaviria, Laura; Salcido, John Paul; Guda, Teja

    2014-01-01

    Tooth loss is very a very common problem; therefore, the use of dental implants is also a common practice. Although research on dental implant designs, materials and techniques has increased in the past few years and is expected to expand in the future, there is still a lot of work involved in the use of better biomaterials, implant design, surface modification and functionalization of surfaces to improve the long-term outcomes of the treatment. This paper provides a brief history and evolution of dental implants. It also describes the types of implants that have been developed, and the parameters that are presently used in the design of dental implants. Finally, it describes the trends that are employed to improve dental implant surfaces, and current technologies used for the analysis and design of the implants. PMID:24868501

  6. Biostatistical consultation for dental research.

    PubMed

    Clive, Jonathan

    2002-01-01

    Dental science researchers do not really need a detailed, ready-at-hand knowledge of statistics to design and perform high quality scientific research. Although the acquisition and utilization of such knowledge by dental researchers is not discouraged, it is proposed that it is more important for dental researchers to be committed to developing and maintaining a long term, ongoing, interactive consulting relationship with a biostatistician. The nature of this relationship will depend in large part on the complexity of the dental research being conducted. While the statistical consultant will assist in interpreting analytic results for the dental researcher, the latter will need to provide extensive input in assisting in the estimation of sample size and power, and for expressing scientific hypotheses in statistical terms so that the appropriate data analytic methodology can be specified.

  7. The american dental dream.

    PubMed

    Hodges, Nathan

    2015-01-01

    The American Dental Dream-the cultural desire for straight, white teeth-is difficult, if not impossible, for poor and working-class people to achieve. Using ethnographic fiction, autoethnography, poetry, and qualitative interviewing, I brush away the taken-for-granted assumptions about teeth. I explore the personal, relational, and structural consequences of this cultural desire, and show how social class writes itself on our bodies. I write these culture-centered teeth tales to show how one might cope with their teeth.

  8. Lasers In Dental Diagnosis

    NASA Astrophysics Data System (ADS)

    Everse, K. E.; Sinor, T. W.; Menzel, E. R.

    1987-01-01

    We have investigated the potential of lasers for real time in situ dental diagnosis via transillumination of teeth and gums and via fluorescence. Not surprisingly, absorption and/or scattering of light by teeth was found to be insensitive to light color. However, monochromatic transillumination revealed detail better than white light. Transillumination of gums was best performed with orange-red light because of tissue absorption. Illumination of oral structures by 488 nm Ar-laser light was effective in revealing diagnosis detail by fluorescence. Incipient caries and fine tooth fracture lines that are generally not revealed by radiography were observable by laser.

  9. Dental impression materials.

    PubMed

    Perry, Rachel

    2013-01-01

    It is clear that many impression materials are available to the veterinary dentist. They each have different inherent properties, handling characteristics, and indications for use. A thorough understanding of these concepts is essential if the veterinarian and laboratory technician are to produce meaningful and accurate reproductions of oral structures. New products are constantly being introduced to the dental market, with fantastic claims for ease of use and reproduction of detail. The reader is urged to seek independent research findings when assessing such claims, and make decisions founded in the highest possible levels of evidence.

  10. Dental, Dental Hygiene, and Graduate Students' and Faculty Perspectives on Dental Hygienists' Professional Role and the Potential Contribution of a Peer Teaching Program.

    PubMed

    McComas, Martha J; Inglehart, Marita R

    2016-09-01

    The changing role of dental hygienists deserves dental and dental hygiene educators' attention. The first aim of this survey study was to assess University of Michigan dental, dental hygiene, and graduate students' and faculty members' perceptions of dental hygienists' roles; their attitudes and behaviors related to clinical interactions between dental and dental hygiene students; and perceived benefits of engaging dental hygiene students as peer teachers for dental students. The second aim was to assess whether one group of dental students' experiences with dental hygiene student peer teaching affected their perceptions of the dental hygiene profession. Survey respondents were 57 dental hygiene students in all three years of the program (response rate 60% to 100%); 476 dental students in all four years (response rate 56% to 100%); 28 dental and dental hygiene graduate students (response rate 28%); and 67 dental and dental hygiene faculty members (response rate 56%). Compared to the other groups, dental students reported the lowest average number of services dental hygienists can provide (p≤0.001) and the lowest average number of patient groups for which dental hygienists can provide periodontal care (p<0.001). Dental students also had the least positive attitudes about clinical interactions between dental hygiene and dental students (p<0.001) and perceived the fewest benefits of dental hygiene student peer teaching (p<0.001) before experiencing peer teaching. After experiencing dental hygiene student peer teaching, the dental students' perceptions of dental hygienists' roles, attitudes about clinical interactions with dental hygienists, and perceived benefits of dental hygiene student peer teachers improved and were more positive than the responses of their peers with no peer teaching experiences. These results suggest that dental hygiene student peer teaching may improve dental students' perceptions of dental hygienists' roles and attitudes about

  11. Steinert syndrome and repercussions in dental medicine.

    PubMed

    Baptista, Helena; Lopes Cardoso, Inês

    2017-03-01

    Steinert syndrome, also called myotonic dystrophy type 1, is a genetic disorder with autosomal dominant transmission characterized by myotonia and a multisystemic clinical picture that affects several tissues of the human body. The most common systemic phenotypes are: muscular, cardiac, respiratory, CNS, ocular, gynecological, digestive, orthopedical, as well as cognitive and psychological symptoms (cognitive decline). Muscles involved in voluntary movement are highly affected by myotonia especially distal muscles of upper limbs. These patients also show changes in face, chewing and pharynx muscles that can lead to swallowing and speech problems, dysphagia and in most cases to food aspiration and suffocation. Poor oral hygiene resulting from reduced motor mobility and reduced saliva flux can lead to gingival inflammation and periodontal disease. Other oral manifestations include disturbances at the temporomandibular articulation, dental occlusion changes and reduction in teeth number as a result of caries. Main causes of death are pneumonia and cardiac arrhythmias. The etiopathogeny of this syndrome is still not clear, conditioning the existence of a specific treatment for this disease. Nowadays, treatments consist on the release of the existing symptoms, in an attempt to give a better life quality to patients. It is very important to implement actions that can prevent complications and consequently decrease death. Treatments should be applied in an early stage of the disease. Bronchoscopy and artificial respiration should be used to prevent pneumonia, and regular electrocardiographic monitoring should be done to evaluate defects in the conductive system. Several approaches have been applied to rehabilitate swallowing dysfunction and avoid aspiration like videofluoroscopy, postural techniques and adjustment of diet type. It is the aim of this paper to clarify the ethiology, diagnosis, systemic and oral characteristics of the syndrome, as well as to discuss

  12. Predicting Dental Caries Outcomes in Children

    PubMed Central

    Divaris, K.

    2015-01-01

    In recent years, unprecedented gains in the understanding of the biology and mechanisms underlying human health and disease have been made. In the domain of oral health, although much remains to be learned, the complex interactions between different systems in play have begun to unravel: host genome, oral microbiome with its transcriptome, proteome and metabolome, and more distal influences, including relevant behaviors and environmental exposures. A reasonable expectation is that this emerging body of knowledge can help improve the oral health and optimize care for individuals and populations. These goals are articulated by the National Institutes of Health as “precision medicine” and the elimination of health disparities. Key processes in these efforts are the discovery of causal factors or mechanistic pathways and the identification of individuals or population segments that are most likely to develop (any or severe forms of) oral disease. This article critically reviews the fundamental concepts of risk assessment and outcome prediction, as they relate to early childhood caries (ECC)—a common complex disease with significant negative impacts on children, their families, and the health system. The article highlights recent work and advances in methods available to estimate caries risk and derive person-level caries propensities. It further discusses the reasons for their limited utility in predicting individual ECC outcomes and informing clinical decision making. Critical issues identified include the misconception of defining dental caries as a tooth or surface-level condition versus a person-level disease; the fallacy of applying population-level parameters to individuals, termed privatization of risk; and the inadequacy of using frequentist versus Bayesian modeling approaches to derive individual disease propensity estimates. The article concludes with the notion that accurate caries risk assessment at the population level and “precision dentistry

  13. The Prevalence of Dental Anxiety in Patients of a University Dental Clinic

    ERIC Educational Resources Information Center

    Woodmansey, Karl F.

    2005-01-01

    Dental anxiety remains a pervasive barrier to dental treatment for many individuals, including college-age patients. In this article, the author reviews dental anxiety and examines the usefulness of assessment instruments for identifying dental anxiety. Using 2 unique assessment instruments, he examines the prevalence of dental anxiety in his…

  14. Status of the Predoctoral Dental Education Program and Its Impact on Graduate Dental Education.

    ERIC Educational Resources Information Center

    Allen, Don L.

    1980-01-01

    The status of the current predoctoral dental program and its relationship to graduate dental education is described. Factors that have influenced the dental curriculum and major changes that have occurred are presented. Major issues facing dental education are outlined. A proposal is presented for greater flexibility in dental education.…

  15. Undergraduate dental English education in Japanese dental schools.

    PubMed

    Rodis, Omar M M; Matsumura, Seishi; Kariya, Naoyuki; Nishimura, Michiko; Yoshida, Toshiko

    2013-05-01

    Dental schools in Japan are among many worldwide whose medium of instruction is not in English. With advances in science, technology, and communication, the demand for the globalization of professions increases. At present, dental schools in Asia, the Middle East, and Europe have started revising their dental curricula to either include English courses for dentistry or offer a full English dental curriculum. In Japan, dental English courses started to be introduced into curricula in the early 1990s. However, a survey conducted in 1999 found that English courses were not offered in Japan's twenty-nine dental schools and there was no consensus as to what such courses should include or when and how they should be taught. Ten years after that survey, the survey results reported in this article found that the problems reported in the 1999 survey still exist. Additionally, there are still differences among schools offering English courses in terms of the timing and contents of the courses. Since teachers and school officials will have an important role in curriculum development, this article recommends that a fact-finding meeting with educators, school, and education officials be initiated to discuss, develop, and implement a core curriculum for these dental English courses.

  16. Trends in Dentistry and Dental Education.

    ERIC Educational Resources Information Center

    Valachovic, Richard W.; Weaver, Richard G.; Sinkford, Jeanne C.; Haden, N. Karl

    2001-01-01

    Compiled from many of the surveys that the American Dental Education Association routinely publishes, along with data from surveys conducted by the American Dental Association and U.S. Department of Health and Human Services, presents statistical tables and descriptive text on trends among dental patients, among dental practitioners, and in dental…

  17. Dental photography today. Part 1: basic concepts

    PubMed Central

    CASAGLIA, A.; DE DOMINICIS, P.; ARCURI, L.; GARGARI, M.; OTTRIA, L.

    2015-01-01

    SUMMARY This paper is the first article in a new series on digital dental photography. Part 1 defines the aims and objectives of dental photography for examination, diagnosis and treatment planning, legal and forensic documentation, publishing, education, marketing and communication with patients, dental team members, colleagues and dental laboratory. PMID:28042424

  18. 21 CFR 872.3275 - Dental cement.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns...

  19. 21 CFR 872.3275 - Dental cement.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns...

  20. 21 CFR 872.3275 - Dental cement.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns...

  1. 21 CFR 872.3275 - Dental cement.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns...

  2. 21 CFR 872.3100 - Dental amalgamator.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... is intended for filling dental caries. (b) Classification. Class I (general controls). The device is... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental amalgamator. 872.3100 Section 872.3100 Food... DEVICES DENTAL DEVICES Prosthetic Devices § 872.3100 Dental amalgamator. (a) Identification. A...

  3. Involving Parents in Their Children's Dental Care.

    ERIC Educational Resources Information Center

    Becker, Donna

    1998-01-01

    Asserts that parent education is vital to good dental hygiene for the whole family. Discusses what Head Start staffers can do to ensure that children's dental needs are being met, particularly in assisting parents with taking responsibility for children's dental hygiene. Covers dental care tips for parents, questions and answers about dental…

  4. Dental Curriculum Development in Developing Countries.

    ERIC Educational Resources Information Center

    Phantumvanit, Prathip

    1996-01-01

    Since establishment of formal dental education in Southeast Asia, changes stemming from research and technology have led to dental curriculum changes. Development of the dental curriculum can be divided into three phases: disease oriented; health oriented; and community oriented. Evolution of these phases is traced in the dental curricula of Laos,…

  5. 21 CFR 872.3275 - Dental cement.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental cement. 872.3275 Section 872.3275 Food and... DENTAL DEVICES Prosthetic Devices § 872.3275 Dental cement. (a) Zinc oxide-eugenol—(1) Identification... filling or as a base cement to affix a temporary tooth filling, to affix dental devices such as crowns...

  6. Sources of Dental Health Teaching Aids.

    ERIC Educational Resources Information Center

    Crawford, Jean H.

    1982-01-01

    Sources of dental health education teaching aids which are available for free or at minimal cost include: (1) The American Dental Health Association; (2) state and local departments of public health; (3) schools of dentistry, dental hygiene, and dental assisting; and (4) the Educator's International Guide. (JN)

  7. 21 CFR 872.3700 - Dental mercury.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dental mercury. 872.3700 Section 872.3700 Food and... DENTAL DEVICES Prosthetic Devices § 872.3700 Dental mercury. (a) Identification. Dental mercury is a device composed of mercury intended for use as a component of amalgam alloy in the restoration of...

  8. 21 CFR 872.3100 - Dental amalgamator.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... is intended for filling dental caries. (b) Classification. Class I (general controls). The device is... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Dental amalgamator. 872.3100 Section 872.3100 Food... DEVICES DENTAL DEVICES Prosthetic Devices § 872.3100 Dental amalgamator. (a) Identification. A...

  9. 21 CFR 872.3100 - Dental amalgamator.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... is intended for filling dental caries. (b) Classification. Class I (general controls). The device is... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Dental amalgamator. 872.3100 Section 872.3100 Food... DEVICES DENTAL DEVICES Prosthetic Devices § 872.3100 Dental amalgamator. (a) Identification. A...

  10. 21 CFR 872.3100 - Dental amalgamator.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... is intended for filling dental caries. (b) Classification. Class I (general controls). The device is... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Dental amalgamator. 872.3100 Section 872.3100 Food... DEVICES DENTAL DEVICES Prosthetic Devices § 872.3100 Dental amalgamator. (a) Identification. A...

  11. 21 CFR 872.3100 - Dental amalgamator.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... is intended for filling dental caries. (b) Classification. Class I (general controls). The device is... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Dental amalgamator. 872.3100 Section 872.3100 Food... DEVICES DENTAL DEVICES Prosthetic Devices § 872.3100 Dental amalgamator. (a) Identification. A...

  12. Dental coping strategies, general anxiety, and depression among adult patients with dental anxiety but with different dental-attendance patterns.

    PubMed

    Bernson, Jenny M; Elfström, Magnus L; Hakeberg, Magnus

    2013-06-01

    The aim of the present study was to investigate dental coping strategies, general anxiety, and depression in relation to regularity of dental treatment among persons with either regular dental care or phobic avoidance, whilst controlling for sociodemographic factors. Psychometric questionnaires on dental anxiety, dental coping strategies, general anxiety, and depression were delivered to 263 adult patients with dental phobic avoidance behavior who were seeking help from a specialized dental fear clinic and to 141 adult patients with dental anxiety who were receiving regular dental care from various public dental clinics. The results showed that the levels of dental and general anxiety and of depression were significantly higher among irregular attendees compared with regular attendees. Irregular attendees admitted fewer adaptive coping strategies. Predictive of irregular dental care were gender, dental anxiety, general anxiety, and the nonuse of the coping strategy 'optimism'. This study further confirms earlier preliminary results that the use of optimistic thinking is predictive for regular dental attendance habits and that male gender is a risk factor for irregular attendance. Moreover, this study adds that a high level of general anxiety indicates a higher risk for irregular dental care.

  13. Sensitivity of spectral moments to Swedish dental versus American English alveolar word-initial /t/ bursts

    NASA Astrophysics Data System (ADS)

    Buder, Eugene H.; Parham, Douglas F.; Stoel-Gammon, Carol

    2003-04-01

    Previous investigations comparing Swedish dental versus American English alveolar /t/ production found many acoustic differences in both adults and 30-month-old children [C. Stoel-Gammon, K. Williams, and E. H. Buder, ``Cross-language differences in phonological acquisition: Swedish and American /t/,'' Phonetica 51, 146-158 (1994)]. The primary differences in the word initial consonants included the second spectral moment (``spectral SD''), VOT, and burst intensity. However, subsequent studies demonstrated that spectral SD and other moments measures were sensitive to recording environment and correlated with other production characteristics. Moreover, measurements of spectral SD differed across these languages in other stop bursts such as /p/ and /k/. These observations raised questions regarding the true sensitivity of this measure in place of articulation for /t/. To examine these questions, the current work examines stop burst characteristics of two adult male native speakers of Swedish and American English recorded in an anechoic chamber with digital equipment. Results suggest that the primary variation of spectral SD in /t/ bursts is attributable to the dental versus the alveolar place of articulation. However, the results indicate that spectral moment measures are also generally sensitive to burst intensity, which may be unrelated to place but still language-specific. [Work supported by NICHD R01-HD32065.

  14. Learning Together? Experiences on a China-U.K. Articulation Program in Engineering

    ERIC Educational Resources Information Center

    Hou, Junxia; McDowell, Liz

    2014-01-01

    This article reports some of the findings of a longitudinal ethnographic research study on the intercultural transition experiences of 50 engineering students in a China-U.K. articulation program. It focuses on the interaction between these students and the U.K.-based cohort, mainly home students. The findings indicate that lack of suitable…

  15. Lubrication Specialist: Task List and Competency Record. Developed for Vocational-Technical Curriculum Articulation in Minnesota.

    ERIC Educational Resources Information Center

    Minnesota State Dept. of Education, St. Paul. Div. of Vocational and Technical Education.

    Intended for the vocational instructor, the booklet presents a task list and competency record for the occupational program of lubrication specialist. The list was developed by a working committee of auto mechanics instructors and industry representatives throughout the state of Minnesota for use in program articulation between secondary and…

  16. Automotive Mechanic: Task List and Competency Record. Developed for Vocational-Technical Curriculum Articulation in Minnesota.

    ERIC Educational Resources Information Center

    Minnesota State Dept. of Education, St. Paul. Div. of Vocational and Technical Education.

    Intended for the vocational instructor, the booklet presents a task list and competency record for the occupational program of automotive mechanic. The list was developed by a working committee of auto mechanics instructors and industry representatives throughout the state of Minnesota for use in program articulation between secondary and…

  17. Articulated, Performance-Based Instruction Objectives Guide for Automotive Mechanics. Final Document. Revised.

    ERIC Educational Resources Information Center

    Henderson, William Edward, Jr.

    Developed during a project designed to provide continuous, performance-based vocational training at the secondary and postsecondary levels, this instructional guide is intended to help teachers implement a laterally and vertically articulated secondary level automotive mechanics program. Introductory materials include descriptions of Automotive…

  18. Feasibility of an LPN to ADN Articulation Program at LSUA. Vocational Education Research.

    ERIC Educational Resources Information Center

    Louisiana State Univ., Alexandria.

    A feasibility study examined the need for and likelihood of success for a Licensed Practical Nurse (LPN) to Associate Degree in Nursing (ADN) articulation program for Louisiana State University (LSU) at Alexandria. Following a literature search on the theoretical establishment and implementation of such a program, three schools with successful…

  19. Field Articulation and Working Memory. Lektos: Interdisciplinary Working Papers in Language Sciences, Vol. 2, No. 2.

    ERIC Educational Resources Information Center

    Robinson, John A.; Bennink, Carl D.

    A study was conducted to provide an assessment of the general efficiency of working memory in relation to level of field articulation. The task required a subject to retain a series of digits for subsequent report while performing a semantic modification of a target phrase. The working memory hypothesis predicts that the joint impact of high…

  20. A Career Education Articulation Model, K-14. Exemplary Project. Final Report.

    ERIC Educational Resources Information Center

    Iowa Central Community College, Fort Dodge.

    This final report contains materials and forms developed for the Iowa Career Education Articulation Model (K-14). Project goals were to design and pilot a career education inventory system to determine the impact of career education upon the students, to design a monitoring process system to assess the status of career education activities, to…

  1. The Effect of Otitis Media on Articulation in Children with Cerebral Palsy.

    ERIC Educational Resources Information Center

    Van der Vyver, Marguerite; And Others

    1988-01-01

    A study involving 20 Afrikaans-speaking children with cerebral palsy found that recurrent otitis media in early childhood had a negative effect on articulation abilities of the 7 to 11-year-old children but that other factors such as intelligence also played a role. (JDD)

  2. The Effects of Otitis Media on Articulation. Final Report for 1982-1983.

    ERIC Educational Resources Information Center

    Roberts, Joanne Erwick

    The study examined the relationship in 44 preschoolers (considered to have varying degrees of predicted risk for poor school performance) between otitis media (middle ear disease) during the first 3 years of life and speech production (articulation) during preschool and school age years. Speech production accuracy was assessed by the number of…

  3. Career Ladder Articulation in Marketing and Distributive Education, Secondary Level to Post-Secondary Level.

    ERIC Educational Resources Information Center

    Matthias, Tim; And Others

    This presentation contains articulated curricula in marketing and distributive education which avoid duplication and/or overlapping of learning units from high school to postsecondary levels. First, descriptions and outlines of the high school Marketing and Distributive Education curriculum based on the Indiana curriculum mode are presented.…

  4. Improving Articulation and Transfer Relationships. New Directions for Community Colleges, Number 39.

    ERIC Educational Resources Information Center

    Kintzer, Frederick C., Ed.

    1982-01-01

    With the intent of revitalizing the study of educational articulation and transfer, this collection of essays describes and assesses the current status of transfer education, points to particular problems and concerns, and highlights specific techniques, activities, and practices. The volume includes "The Transfer Function--One of Many,"…

  5. The Somatotopy of Speech: Phonation and Articulation in the Human Motor Cortex

    ERIC Educational Resources Information Center

    Brown, Steven; Laird, Angela R.; Pfordresher, Peter Q.; Thelen, Sarah M.; Turkeltaub, Peter; Liotti, Mario

    2009-01-01

    A sizable literature on the neuroimaging of speech production has reliably shown activations in the orofacial region of the primary motor cortex. These activations have invariably been interpreted as reflecting "mouth" functioning and thus articulation. We used functional magnetic resonance imaging to compare an overt speech task with tongue…

  6. The IPA Categories "Pharyngeal" and "Epiglottal": Laryngoscopic Observations of Pharyngeal Articulations and Larynx Height.

    ERIC Educational Resources Information Center

    Esling, John H.

    1999-01-01

    Reexamines the sounds produced at the pharyngeal place of articulation to review the linguistic phonetic realizations of sounds that have been labeled "pharyngeal" and those that have been labeled "epiglottal," and to investigate the production of a series of pharyngeal sounds under conditions of larynx raising and larynx…

  7. A Sequence for Helping Children Having Mild to Moderate Functional Articulation Problems.

    ERIC Educational Resources Information Center

    Hayek, Robert A.

    Presented are specific sequential procedures for use by paraprofessionals in correcting children's mild to moderate articulation problems. The sequence consists of eight activities to prepare the child for the program, five steps in the area of ear training, and ten steps to teach speech production. Activities and minimum teaching times are…

  8. The Angle of Articulation in Textual Movement. Cognitive Science Research No. 60.

    ERIC Educational Resources Information Center

    Bierschenk, Bernhard

    Natural systems are self-organizing and stratify according to the angular articulation of their movements. In particular, movement is relative to the levels that define its behavior space. As natural phenomenon, text production is self-referential, In generating information, the intention of the producer of a text becomes specified. Specifying of…

  9. The Role of Language Program Directors in the Articulation of American Sign Language Foreign Language Programs

    ERIC Educational Resources Information Center

    Knigga, Margaret E.

    2012-01-01

    Lange (1988) has defined "articulation" as "the interrelationship and continuity of contents, curriculum, instruction, and evaluation with programs which focus on the progress of student in learning to both comprehend and communicate in a second language" (p. 16-17). It is the continuity of one course to the next without…

  10. Disorders of Articulation. Prentice-Hall Foundations of Speech Pathology Series.

    ERIC Educational Resources Information Center

    Carrell, James A.

    Designed for students of speech pathology and audiology and for practicing clinicians, the text considers the nature of the articulation process, criteria for diagnosis, and classification and etiology of disorders. Also discussed are phonetic characteristics, including phonemic errors and configurational and contextual defects; and functional…

  11. Allied Health Education/Transfer of Credit: Recommendations of the North Carolina Articulation Project.

    ERIC Educational Resources Information Center

    Boatman, Ralph H., Ed.; Huther, John W., Ed.

    The North Carolina Allied Health Articulation Project was launched to develop procedures which would enable an individual to transfer credit from an allied health education program in one setting to some program in higher education. In 1972-73, study committees were appointed to deal with the allied health professions of physical therapy,…

  12. How to Program Generalization of Articulation Gains through Self-Monitoring Procedures.

    ERIC Educational Resources Information Center

    Koegel, Lynn Kern; Koegel, Robert L.

    The booklet discusses generalization issues and the use of self-monitoring to promote generalization of articulation treatment. Following an explanation of generalization and its varieties (such as response generalization, stimulus-response generalization, and generalization across time), units cover measurement of generalization, materials, and…

  13. I Am Sure There May Be a Planet There: Student Articulation of Uncertainty in Argumentation Tasks

    ERIC Educational Resources Information Center

    Buck, Zoë E.; Lee, Hee-Sun; Flores, Joanna

    2014-01-01

    We investigated how students articulate uncertainty when they are engaged in structured scientific argumentation tasks where they generate, examine, and interpret data to determine the existence of exoplanets. In this study, 302 high school students completed 4 structured scientific arguments that followed a series of computer-model-based…

  14. Articulation Outcomes from Use of the Products and Services of the Florida Statewide Course Numbering System.

    ERIC Educational Resources Information Center

    Waggaman, John S.

    The results of an evaluation of the Florida Statewide Course Numbering System (SCNS) are discussed. Surveys were conducted with the institutional liaison officers to SCNS, as well as with faculty members and department chairs. The uniform course numbering system is designed to enhance articulation, particularly the efficient movement of students…

  15. The Acoustic Properties of Vowels: A Tool for Improving Articulation and Comprehension of English

    ERIC Educational Resources Information Center

    McCombs, Candalene J.

    2006-01-01

    Correct pronunciation is often a later step in the process of teaching English as a second language. However, a focus on the correct articulation of vowels can significantly improve listening and comprehension skills as well as articulatory skills. Vowels and consonants differ in their acoustic properties. Unlike consonants, vowel sounds are…

  16. Misspoken in Arizona: Latina/o Students Document the Articulations of Racism

    ERIC Educational Resources Information Center

    Cammarota, Julio

    2014-01-01

    This article reports on racism expressed by school personnel (administrators and teachers) and experienced by Latina/o students at a high school located in Tucson, Arizona. Students in a specialized social science research program, called the Social Justice Education Project (SJEP), documented personal encounters with racist articulations at their…

  17. Cognitive Levels Regarding Articulation Marks among Violin Students in Department of Music Education in Gazi University

    ERIC Educational Resources Information Center

    Taninmis, Gamze Elif

    2016-01-01

    The purpose of this study is to determine violin students' cognitive levels about articulation marks in Department of Music Education, Fine Arts Education, Gazi Faculty of Education, Gazi University (GUGEF), and to identify the variables on which the cognitive levels vary. It is a descriptive research considering the study purpose, method and…

  18. Dreams Worth Pursuing: How College Students Develop and Articulate Their Purpose in Life

    ERIC Educational Resources Information Center

    Schluckebier, Michael Edward

    2013-01-01

    The purpose of this study was to describe the experiences undergraduate students cite as helping them develop and articulate their purpose in life. Purpose in life, as a construct, is associated with many positive attributes associated with life in general, and the college experience specifically; however, it is also closely related to other…

  19. Articulation of Industrial R&D with Higher Education in the Telecommunications Sector in South Africa

    ERIC Educational Resources Information Center

    Paterson, Andrew

    2005-01-01

    This article shows how and why particular higher education?industry research and development networks articulate with the South African telecommunications sector. The range of competing and complementary data telecommunications technologies available in the South African market provide varying opportunities for enterprises to engage in R&D. Two…

  20. Gender Equality in Media Content and Operations: Articulating Academic Studies and Policy--A Presentation

    ERIC Educational Resources Information Center

    Lourenço, Mirta Edith

    2016-01-01

    In this article, Mirta Lourenço explains the prospects when higher education studies interface with UNESCO for policy change. The baseline is that education institutions' articulation with media organizations, media professionals, policy-makers, and civil society groups is essential to achieve gender equality in and through media.

  1. Historical Trends of Articulation in America: A Review of the Literature

    ERIC Educational Resources Information Center

    Mosholder, Richard S.; Zirkle, Christopher J.

    2007-01-01

    Articulation agreements have been part of the American educational scene for well over 100 years. Initially implemented as a tool for more effectively and efficiently delivering liberal educations, they became more common as the numbers of community colleges grew during the 1960s and 1970s. During the mid-1980s, the universal education promise of…

  2. Articulated Multimedia Physics, MBO List. Measurable Behavioral Objectives, Lessons 1 through 14.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    A list of measurable behavioral objectives (MBO) is presented in this booklet for use throughout the Articulated Multimedia Physics Course. The objectives are divided into terminal and enabling objectives. Computer analyses of student's achievement are given in the form of the MBO number. The objectives are grouped into 14 lessons: measurement and…

  3. Optical Fiber Sensors For Monitoring Joint Articulation And Chest Expansion Of A Human Body

    DOEpatents

    Muhs, Jeffrey D.; Allison, Stephen W.

    1997-12-23

    Fiber-optic sensors employing optical fibers of elastomeric material are incorporated in devices adapted to be worn by human beings in joint and chest regions for the purpose of monitoring and measuring the extent of joint articulation and chest expansion especially with respect to time.

  4. Is Tongue Strength an Important Influence on Rate of Articulation in Diadochokinetic and Reading Tasks?

    ERIC Educational Resources Information Center

    Neel, Amy T.; Palmer, Phyllis M.

    2012-01-01

    Purpose: The purpose of this study was to assess the relationship between tongue strength and rate of articulation in 2 speech tasks, diadochokinetic rates and reading aloud, in healthy men and women between 20 and 78 years of age. Method: Diadochokinetic rates were measured for the syllables /p[wedge]/, /t[wedge]/, /k[wedge]/, and…

  5. "2+2" Articulated Health Occupations Project. Nursing Program. Second Year Final Report.

    ERIC Educational Resources Information Center

    Paris Independent School District, TX.

    A project was conducted to develop a 2 + 2 articulated training program in health careers to link the last 2 years of secondary and the first 2 years of postsecondary training. During the second year of the secondary project, the first year of training was implemented and the model program was further developed and refined. Project tasks included…

  6. An Analysis of Sound Blending Skills in Reading and Articulation Impaired Children.

    ERIC Educational Resources Information Center

    McKenney, Ruth Smith

    Analyzed was the performance of 36 third grade children with various reading and articulation skills in blending selected syllables across three modes of presentation. Ss were divided into three groups: one with normal reading and speech skills, one with below grade-level reading skills and normal speech skills, and one with grade-level reading…

  7. Transfer and Articulation Issues between California Community Colleges and California State University

    ERIC Educational Resources Information Center

    Tucker, Linda

    2013-01-01

    Purpose: The primary purpose of this study was to discover common transfer and articulation practices and to determine what practices aid in the implementation of the STAR Act between California Community Colleges and the California State University. The review of literature revealed a lack of research on the application of practices in transfer…

  8. Articulation to and from the Applied Associate Degree: Challenges and Opportunities

    ERIC Educational Resources Information Center

    Ignash, Jan M.

    2012-01-01

    This chapter discusses the "tangled knot" of articulating associate degrees in applied fields and reviews sample programs from applied associate (A.A.S.) to baccalaureate degrees using three distinct pathways, comparing the resulting A.A.S. to baccalaureate degree pathways to similar B.A. or B.S. programs. It focuses predominantly on curricular…

  9. Encouraging Student Reflection and Articulation Using a Learning Companion: A Commentary

    ERIC Educational Resources Information Center

    Goodman, Bradley; Linton, Frank; Gaimari, Robert

    2016-01-01

    Our 1998 paper "Encouraging Student Reflection and Articulation using a Learning Companion" (Goodman et al. 1998) was a stepping stone in the progression of learning companions for intelligent tutoring systems (ITS). A simulated learning companion, acting as a peer in an intelligent tutoring environment ensures the availability of a…

  10. Articulating Scientific Practice: Understanding Dean Hamer's "Gay Gene" Study as Overlapping Material, Social and Rhetorical Registers

    ERIC Educational Resources Information Center

    Lynch, John A.

    2009-01-01

    Rhetoricians have tried to develop a better understanding of the connection between words and things, but these attempts often employ a logic of representation that undermines a full examination of materiality and the complexity of scientific practice. A logic of articulation offers a viable alternative by focusing attention on the linkages…

  11. Exploring the Articulation and Evaluation of the Learning Outcomes of Instructor Development: A Case Study

    ERIC Educational Resources Information Center

    Macfarlane, Jack P.

    2014-01-01

    The definition of clear goals is essential to the effectiveness of training intended for the advancement of professional development. Properly articulated instructional goals also facilitate the evaluation of the intended outcomes of the learning event. Although outcomes-based instruction is prevalent in K-12 settings as well as in post-secondary…

  12. Interinstitutional Collaboration Practices between Virginia Community Colleges and High Schools Involved in Dual Enrollment Articulation Agreements

    ERIC Educational Resources Information Center

    Caradona, Sally Lynn

    2012-01-01

    The purpose of this study was to build on the previous work of articulation practices of Virginia's public school divisions and community colleges participating in dual enrollment partnerships, and to understand the role of the community college in initiating, developing, and implementing dual enrollment programs. The primary focus involved…

  13. Investigating the Effects of Professional Practice Program on Teacher Education Students' Ability to Articulate Educational Philosophy

    ERIC Educational Resources Information Center

    Weshah, Hani A.

    2013-01-01

    The purpose of this study was to investigate the changes in pre-service student teachers' ability to articulate a philosophy education during the field experience. Educational philosophy change for the participants (77) was measured by using Jersin's scale. Evaluations of scores involved comparison of pre and post the training program. Descriptive…

  14. Articulated Curriculum for Agricultural Occupations. 2 + 2. Second Year Final Report.

    ERIC Educational Resources Information Center

    Daingerfield-Lone Star Independent School District, Daingerfield, TX.

    The Agriculture 2+2 Curriculum Development Project was an articulated training program linking the last 2 years of secondary and the first 2 years of postsecondary training designed to prepare students for employment in 3 or more agricultural technology occupations. The curriculum provided for the development of saleable skills after grade 12 and…

  15. Implementing Transfer and Articulation: A Case Study of Community Colleges and State Universities

    ERIC Educational Resources Information Center

    Senie, Kathryn C.

    2016-01-01

    This study examined the cultural aspects of a transfer articulation policy between public community colleges and state universities enacted by a newly consolidated state governing board for higher education in a northeastern state. A qualitative multisite case study design explored how key stakeholders, faculty, administrators and staff viewed the…

  16. Advancing Articulation: Models of College-University Collaboration in Canadian Higher

    ERIC Educational Resources Information Center

    Kirby, Dale

    2008-01-01

    This paper reports on the results of an analysis of program articulation between the college and university sectors in Canada. The Canadian post-secondary system is best described as a binary system with discrete university and non-university sectors. While there are complex sectoral differences between the two institutional types in terms of…

  17. Articulation Rate and Vowel Space Characteristics of Young Males with Fragile X Syndrome: Preliminary Acoustic Findings

    ERIC Educational Resources Information Center

    Zajac, David J.; Roberts, Joanne E.; Hennon, Elizabeth A.; Harris, Adrianne A.; Barnes, Elizabeth F.; Misenheimer, Jan

    2006-01-01

    Purpose: Increased speaking rate is a commonly reported perceptual characteristic among males with fragile X syndrome (FXS). The objective of this preliminary study was to determine articulation rate--one component of perceived speaking rate--and vowel space characteristics of young males with FXS. Method: Young males with FXS (n = 38), …

  18. The Negotiation and Articulation of Identity, Position and Ethos in Joint Church Academies

    ERIC Educational Resources Information Center

    Green, Elizabeth

    2014-01-01

    This paper summarises the key findings of a research project into the identity, position and ethos of jointly sponsored church academies. The research sought to investigate how joint church academies are situated within the field, how they relate to existing academies and the maintained church school sector and how they articulate their vision and…

  19. Articulated, Performance-Based Instruction Objectives Guide for Welding. Final Document. Revised.

    ERIC Educational Resources Information Center

    Henderson, William Edward, Jr.

    Developed during a project designed to provide continuous, performance-based vocational training at the secondary and postsecondary levels, this instructional guide is intended to help teachers implement a laterally and vertically articulated secondary level welding program. Introductory materials include descriptions of Welding I and II,…

  20. Phonologic Error Distributions in the Iowa-Nebraska Articulation Norms Project: Word-Initial Consonant Clusters.

    ERIC Educational Resources Information Center

    Smit, Ann Bosma

    1993-01-01

    The errors on word-initial consonant clusters made by children (ages 2-9) in the Iowa-Nebraska Articulation Norms Project were tabulated by age range and frequency. Error data showed support for previous research in the acquisition of clusters. Cluster errors are discussed in terms of theories of phonologic development. (Author/JDD)

  1. Articulated, Performance-Based Instruction Objectives Guide for Machine Shop Technology.

    ERIC Educational Resources Information Center

    Henderson, William Edward, Jr., Ed.

    This articulation guide contains 21 units of instruction for two years of machine shop. The objectives of the program are to provide the student with the basic terminology and fundamental knowledge and skills in machining (year 1) and to teach him/her to set up and operate machine tools and make or repair metal parts, tools, and machines (year 2).…

  2. Hemispheric Language Dominance of Language-Disordered, Articulation-Disordered, and Normal Children.

    ERIC Educational Resources Information Center

    Pettit, John M.; Helms, Suzanne B.

    1979-01-01

    The hemispheric dominance for language of three groups of six- to nine- year-olds (ten language-disordered, ten articulation-disordered, and ten normal children) was compared, and two dichotic listening tests (digits and animal names) were administered. (Author/CL)

  3. Being Nature: Interspecies Articulation as a Species-Specific Practice of Relating to Environment

    ERIC Educational Resources Information Center

    Rautio, Pauliina

    2013-01-01

    Rather than categorically teaching us ways to be less anthropocentric, environmental education could be about educating us of the ways in which we already are nature as human animals. In this paper, one species-specific practice of human relating to environment--interspecies articulation--is argued as one way of being nature. Interspecies…

  4. Teachers Reflecting on Their Work: Articulating What Is Said about What Is Done

    ERIC Educational Resources Information Center

    Mena Marcos, Juan Jose; Sanchez, Emilio; Tillema, Harm

    2008-01-01

    Teachers' written reflections on their work, which report on a change in their practice, were the object of this research. Taking teachers' articulation of their plans and actions in teacher journals as our source, this study's aim is twofold: (1) to describe how teacher reflect in a self-initiated and non-framed way on their own practice, and (2)…

  5. Bilingual Students Articulation and Gesticulation of Mathematical Knowledge during Problem Solving

    ERIC Educational Resources Information Center

    Dominguez, Higinio

    2005-01-01

    This research focuses on eliciting bilingual students' problem-solving reasoning by providing mathematical tasks designed to involve the students in the action described in the problem by making connections to contexts familiar to them. Results showed these tasks allowed children to articulate their mathematical reasoning through gestures and…

  6. Ideas in Disguise: "Fortune"'s Articulation of Productivity 1969-1972

    ERIC Educational Resources Information Center

    Truty, John David

    2010-01-01

    "Fortune" magazine's articulation of productivity during the period 1969 to 1972 was a skillfully crafted work of propaganda that mixed public perception about (a) the younger generation, (b) issues about the growing rate of inflation, (c) shifting employment sectors, (d) increasing nominal wages, and (e) declining rate of profit.…

  7. Admissions; Evaluation of Credentials; Financial Aids; Marketing and Recruitment; Articulation Agreements and Practices.

    ERIC Educational Resources Information Center

    College and University, 1980

    1980-01-01

    Proceedings of the 66th Annual Meeting of the American Association of Collegiate Registrars and Admissions Officers that relate to admissions, evaluation of credentials, financial aid, marketing and recruitment, and articulation agreements and practices are summarized. Names and institutions of conference participants are included. (MSE)

  8. Admissions; Evaluation of Credentials; Financial Aids; Marketing and Recruitment; Articulation Agreements and Practices.

    ERIC Educational Resources Information Center

    College and University, 1981

    1981-01-01

    Proceedings of the 67th Annual Meeting of the American Association of Collegiate Registrars and Admissions Officers which relate to admissions, evaluation of credentials, student financial aid, marketing and recruitment, and articulation agreements and practices are summarized. Names and institutions of conference participants are included. (MSE)

  9. Activating a Teaching Philosophy in Social Work Education: Articulation, Implementation, and Evaluation

    ERIC Educational Resources Information Center

    Owens, Larry W.; Miller, J. Jay; Grise-Owens, Erlene

    2014-01-01

    This article describes how to develop a comprehensive teaching philosophy from articulation through implementation to evaluation. Using literature and teaching-learning experiences, we discuss pragmatic steps for using a teaching philosophy to inform, engage, and evaluate teaching-learning. We promote an integrated teaching philosophy to ensure…

  10. Articulated Multimedia Physics, Lesson 14, Gases, The Gas Laws, and Absolute Temperature.

    ERIC Educational Resources Information Center

    New York Inst. of Tech., Old Westbury.

    As the fourteenth lesson of the Articulated Multimedia Physics Course, instructional materials are presented in this study guide with relation to gases, gas laws, and absolute temperature. The topics are concerned with the kinetic theory of gases, thermometric scales, Charles' law, ideal gases, Boyle's law, absolute zero, and gas pressures. The…

  11. Jazz Style and Articulation: How to Get Your Band or Choir to Swing

    ERIC Educational Resources Information Center

    Tolson, Jerry

    2012-01-01

    The interpretation of jazz style is crucial to the element of swing in any jazz ensemble performance. Today, many charts for both large and small instrumental and vocal jazz ensembles are well marked with articulations and expression markings. However, in some cases, there is nothing to guide the musician. This article addresses some common jazz…

  12. A simplified impression technique for dental implants.

    PubMed

    Vogel, Robert E

    2002-03-01

    Dental implants have been considered an acceptable form of dental treatment since the early 1980s. A number of studies have been published describing impression techniques for dental implants. Many of the techniques described are so complex that they may seem daunting to the average restorative dentist. Most general practitioners do not wish to attempt to restore dental implants. This article describes a very simple, yet extremely accurate, technique for making impressions of dental implant fixtures.

  13. A Survey of Civilian Dental Computer Systems.

    DTIC Science & Technology

    1988-01-01

    r.arketplace, the orthodontic community continued to pioneer clinical automation through diagnosis, treat- (1) patient registration, identification...profession." New York State Dental Journal 34:76, 1968. 17. Ehrlich, A., The Role of Computers in Dental Practice Management. Champaign, IL: Colwell...Council on Dental military dental clinic. Medical Bulletin of the US Army Practice. Report: Dental Computer Vendors. 1984 Europe 39:14-16, 1982. 19

  14. Initial dental needs and a projection of needed dental capacity in the Iowa Department of Corrections.

    PubMed

    Ringgenberg, Wendy J

    2011-04-01

    The dental health data for the Iowa Department of Corrections (IDOC) inmate population were analyzed to better understand dental health issues experienced by inmates and IDOC's system for responding to those dental needs. Each inmate is given a dental health assessment upon admission to Iowa's prison system. These data were analyzed for frequency of dental health needs and frequency of dental health services. In addition, emergency dental health services were analyzed. The findings show that each inmate has approximately 7.6 dental codes, including the initial exam, dental services provided, and dental needs not yet addressed. When reviewing only dental needs (and not the initial exam), 32% (5,110) identified dental needs were completed and 66% (10,572) were not.

  15. Articulation of Vocational Education. Proceedings of the Sun Mountain Conference (Winthrop, Washington, May 18-20, 1975).

    ERIC Educational Resources Information Center

    Heuchert, Arnie H., Ed.; Postlewaite, Beverly W., Ed.

    Articulation is the relationship between educational programs which provides a smooth transition for a student moving, either horizontally or vertically, between programs. The major objectives of this conference were to: (1) identify problem areas and strategies for improving articulation among secondary and postsecondary vocational education…

  16. Tech Prep Articulation from Alabama's Public Schools to Alabama's Two-Year Colleges: Perceptions of Administrators, Counselors, and Technical Teachers

    ERIC Educational Resources Information Center

    Cain, H. Jason

    2013-01-01

    Although dual enrollment and other programs that allow high school students to earn college credit are viable and beneficial, articulation is not being extensively utilized. Therefore, the purpose of this study was to examine the articulation policy and its implementation between Alabama's high schools and two-year colleges. It was expected that…

  17. Adult Basic Education in British Columbia's Public Post-Secondary Institutions. An Articulation Handbook. 2007-2008 Edition

    ERIC Educational Resources Information Center

    Ministry of Advanced Education, 2007

    2007-01-01

    This is the twenty-second edition of the Adult Basic Education (ABE) Articulation Handbook for British Columbia's public postsecondary institutions. The purpose of ABE articulation is to ensure learners have access to quality courses, receive appropriate credits and are able to transfer easily among publicly-funded colleges, university colleges,…

  18. Roughness Measurement of Dental Materials

    NASA Astrophysics Data System (ADS)

    Shulev, Assen; Roussev, Ilia; Karpuzov, Simeon; Stoilov, Georgi; Ignatova, Detelina; See, Constantin von; Mitov, Gergo

    2016-06-01

    This paper presents a roughness measurement of zirconia ceramics, widely used for dental applications. Surface roughness variations caused by the most commonly used dental instruments for intraoral grinding and polishing are estimated. The applied technique is simple and utilizes the speckle properties of the scattered laser light. It could be easily implemented even in dental clinic environment. The main criteria for roughness estimation is the average speckle size, which varies with the roughness of zirconia. The algorithm used for the speckle size estimation is based on the normalized autocorrelation approach.

  19. Speech therapy for compensatory articulations and velopharyngeal function: a case report.

    PubMed

    Bispo, Nachale Helen Maciel; Whitaker, Melina Evangelista; Aferri, Homero Carneiro; Neves, Josiane Denardi Alves; Dutka, Jeniffer de Cássia Rillo; Pegoraro-Krook, Maria Inês

    2011-01-01

    The objective of this study was to describe the process of intensive speech therapy for a 6-year-old child using compensatory articulations while presenting with velopharyngeal insufficiency (VPI) and a history of cleft lip and palate. The correction of VPI was temporarily done with a pharyngeal obturator since the child presented with very little movement of the pharyngeal walls during speech, compromising the outcome of a possible pharyngeal flap procedure (pharyngoplasty). The program of intensive speech therapy involved 3 phases, each for duration of 2 weeks incorporating 2 daily sessions of 50 minutes of therapy. A total of 60 sessions of intervention were done with the initial goal of eliminating the use of compensatory articulations. Evaluation before the program indicated the use of co-productions (coarticulations) of voiceless plosive and fricative sounds with glottal stops (simultaneous production of 2 places of productions), along with weak intraoral pressure and hypernasality, all compromising speech intelligibility. To address place of articulation, strategies to increase intraoral air pressure were used along with visual, auditory and tactile feedback, emphasizing the therapy target and the air pressure and airflow during plosive and fricative sound productions. After the first two phases of the program, oral place of articulation of the targets were achieved consistently. During the third phase, velopharyngeal closure during speech was systematically addressed using a bulb reduction program with the objective of achieving velopharyngeal closure during speech consistently. After the intensive speech therapy program involving the use of a pharyngeal obturator, we observed absence of hypernasality and compensatory articulation with improved speech intelligibility.

  20. Speech therapy for compensatory articulations and velopharyngeal function: a case report

    PubMed Central

    BISPO, Nachale Helen Maciel; WHITAKER, Melina Evangelista; AFERRI, Homero Carneiro; NEVES, Josiane Denardi Alves; DUTKA, Jeniffer de Cássia Rillo; PEGORARO-KROOK, Maria Inês

    2011-01-01

    The objective of this study was to describe the process of intensive speech therapy for a 6-year-old child using compensatory articulations while presenting with velopharyngeal insufficiency (VPI) and a history of cleft lip and palate. The correction of VPI was temporarily done with a pharyngeal obturator since the child presented with very little movement of the pharyngeal walls during speech, compromising the outcome of a possible pharyngeal flap procedure (pharyngoplasty). The program of intensive speech therapy involved 3 phases, each for duration of 2 weeks incorporating 2 daily sessions of 50 minutes of therapy. A total of 60 sessions of intervention were done with the initial goal of eliminating the use of compensatory articulations. Evaluation before the program indicated the use of co-productions (coarticulations) of voiceless plosive and fricative sounds with glottal stops (simultaneous production of 2 places of productions), along with weak intraoral pressure and hypernasality, all compromising speech intelligibility. To address place of articulation, strategies to increase intraoral air pressure were used along with visual, auditory and tactile feedback, emphasizing the therapy target and the air pressure and airflow during plosive and fricative sound productions. After the first two phases of the program, oral place of articulation of the targets were achieved consistently. During the third phase, velopharyngeal closure during speech was systematically addressed using a bulb reduction program with the objective of achieving velopharyngeal closure during speech consistently. After the intensive speech therapy program involving the use of a pharyngeal obturator, we observed absence of hypernasality and compensatory articulation with improved speech intelligibility. PMID:22231007

  1. [Allergies to dental materials and dental pharmacologic agents].

    PubMed

    Gall, H

    1983-07-01

    Allergic reactions to dental materials and remedies cause stomatitis in the patient and a contact dermatitis in the dental personnel. Topical contact (acrylic resin denture materials, heat accumulation, plaques on the denture) and endogenic (symptom of internal and psychiatric illnesses) factors are the cause for denture sore mouth. In metallic alloys corrosions and electric currents can effect an irritation to the oral mucosa. The application of amalgam fillings can possibly result in a mercurialism. Dental remedies used for treatment of wounds and dental roots are potent sensitizers. Surface anesthetics with tetracaine are the most frequent contact allergens for dentists. Injectable local anesthetics produce anaphylactic type reactions as well as toxic side-effects in the patient.

  2. Do dental students cheat?

    PubMed

    Fuller, J L; Killip, D E

    1979-12-01

    In a questionnaire survey, dental students from all four classes at The University of Iowa College of Dentistry were asked if they had cheated during their first and second years. They were then asked if they believed that others cheated. Cheating was admitted to by 43 percent of the respondents, but 94 percent believed it was occurring. Plagiarism was delineated as a form of cheating; while fewer students admitted to its use, the reported occurrence should be of concern in technique courses. Responses were analyzed both by year in school and grade point average. Reasons for cheating were described; and some conditions conducive to cheating were found to be under the control of the instructor.

  3. Dental Arch Wire

    NASA Technical Reports Server (NTRS)

    1979-01-01

    Straightening teeth is an arduous process requiring months, often years, of applying corrective pressure by means of arch wires-better known as brace-which may have to be changed several times in the course of treatment. A new method has been developed by Dr. George Andreasen, orthodontist and dental scientist at the University of Iowa. The key is a new type of arch wire material, called Nitinol, with exceptional elasticity which helps reduce the required number of brace changes. An alloy of nickel and titanium, Nitinol was originally developed for aerospace applications by the Naval Ordnance Laboratory, now the Naval Surface Weapons Laboratory, White Oaks, Maryland. NASA subsequently conducted additional research on the properties of Nitinol and on procedures for processing the metal.

  4. Epidemiology of dental caries.

    PubMed

    Winter, G B

    1990-01-01

    The most recent epidemiological data on the prevalence of dental caries in children indicate a halting of the increasing levels in many developing countries and a continuing decrease in many highly industrialized countries of the world. However, a further fall in caries levels predicted for 5-yr-old children in the U.K. has not occurred and the decline in caries may have begun to level out. 'Polarization' of caries to a minority of high-risk individuals is occurring in the developed world, with 20-25% of children accounting for more than 50% of the disease. Socio-economic factors are important in determining the proportion of high-risk children in these countries. The multifactorial aetiology of caries allows a number of different interpretations to account for changes in the prevalence of the disease with time, in both the developing and developed countries. These changes are variously ascribed to alterations in dietary habits, especially the consumption of sugar; variations in the patterns of oral hygiene; increased contact with trace elements, especially fluoride, in the environment; changes in the ecology and/or virulence of oral and dental plaque microflora and alterations in the oral protective mechanisms including the immune status. The epidemiological evidence available on the relationship of all these social, environmental and other factors to changes in the prevalence levels of caries does not, however, fully explain all the changes that have been observed. The claim that caries is no longer a public health problem is premature, as it ignores the still high proportion of individuals with tooth decay throughout the world.

  5. Dental Health: The Basic Facts

    MedlinePlus

    ... MS. Resources Academy of General Dentistry 211 East Chicago Avenue Suite 900 Chicago, Illinois 60611 Tel: 888-243-3368 Web site: ... Ask a question American Dental Association 211 East Chicago Avenue Chicago, Illinois 60611 Tel: 312-440-2500 ...

  6. Vocational Interests of Dental Hygienists

    ERIC Educational Resources Information Center

    Ishida, Helen

    1975-01-01

    Using the Strong Vocational Interest Blank, an occupational interest scale for dental hygienists was developed, and comparisons of interests were made between graduates of two- and four-year programs. (Author)

  7. Dental insurance! Are we ready?

    PubMed

    Toor, Ravi S S; Jindal, R

    2011-01-01

    Dental insurance is insurance designed to pay the costs associated with dental care. The Foreign Direct Investment (FDI) bill which was put forward in the winter session of the Lok Sabha (2008) focused on increasing the foreign investment share from the existing 26% to 49% in the insurance companies of India. This will allow the multibillion dollar international insurance companies to enter the Indian market and subsequently cover all aspects of insurance in India. Dental insurance will be an integral a part of this system. Dental insurance is a new concept in Southeast Asia as very few countries in Southeast Asia cover this aspect of insurance. It is important that the dentists in India should be acquainted with the different types of plans these companies are going to offer and about a new relationship which is going to emerge in the coming years between dentist, patient and the insurance company.

  8. Dental abscess: A microbiological review

    PubMed Central

    Shweta; Prakash, S Krishna

    2013-01-01

    Dental abscess is a frequently occurring infectious process known to the health practice. The fate of the infection depends on the virulence of the bacteria, host resistance factors, and regional anatomy. Serious consequences arising from the spread of a dental abscess lead to significant morbidity and mortality. Acute dental abscess is polymicrobial, comprising of strict anaerobes, such as anaerobic cocci, Prevotella, Fusobacterium species, and facultative anaerobes, such as viridans group streptococci and the Streptococcus anginosus group. Numerous novel, uncultivable and fastidious organisms have been identified as potential pathogens with the use of non-culture techniques. The majority of localized dental abscesses respond to surgical treatment while the use of antimicrobials is limited to severe spreading infections. There is a need for good-quality clinical trials of sufficient size to identify the ideal treatment. The microbiology of the acute dentoalveolar abscess and its treatment in the light of improved culture and diagnostic methods are reviewed. PMID:24348613

  9. Dental disease in geriatric horses.

    PubMed

    Lowder, M Q; Mueller, P O

    1998-08-01

    The dental management of geriatric horses can be a rewarding challenge to the practitioner. Owners become dissatisfied when their expectations are unrealistic. Consequently, communication between the owner and the practitioner is essential prior to the start of any dental procedure in a geriatric horse. Owners often expect the practitioner to correct what has been neglected for years. It is critical that the owner understand the possible complications associated with dental procedures and that some procedures (e.g., trephination) may necessitate protracted care. Often, when a tooth has been removed, there is a need for more frequent masticatory examinations to curtail any potential problems (i.e., development of step mouth). The owner needs to be aware of the extra dental maintenance costs that must be included in the upkeep of the horse.

  10. Lip Lifting: Unveiling Dental Beauty.

    PubMed

    Stanley, Kyle; Caligiuri, Matthew; Schlichting, Luís Henrique; Bazos, Panaghiotis K; Magne, Michel

    2017-01-01

    The focus for the achievement of complete success in the esthetic zone has traditionally been on addressing deficiencies of intraoral hard and soft tissue. Often, these deficiencies are accompanied by esthetic concerns regarding the lips that are routinely neglected by the dental team. A predictable plastic surgery technique - the lip lift - has been used for decades to enhance lip esthetics by shortening the senile upper lip to achieve a more youthful appearance. Over the years, this technique has been refined and used in many different ways, allowing its routine incorporation into full facial esthetic planning. Through restoration of the upper lip to its optimal position, the artistry of the dentist and dental technician can truly be appreciated in the rejuvenated smile. By the introduction of this minimally invasive surgical technique to the dental community, patients stand to benefit from a comprehensive orofacial approach to anterior dental esthetic planning.

  11. Clinical Medicine for Dental Students.

    ERIC Educational Resources Information Center

    Stearns, Norman S.; And Others

    1985-01-01

    A program providing instruction in medical topics throughout the dental curriculum at Tufts University is described, and the results of a survey indicating alumni satisfaction with training in physical evaluation techniques and ability to detect medical problems are discussed. (MSE)

  12. Dental management of anticoagulated patients.

    PubMed

    Carr, M M; Mason, R B

    1992-10-01

    Today's trend toward ambulatory medical care will bring more pharmacological problems into the dental office. While the dental management of patients taking oral anticoagulants is controversial, current research supports the contention that they can be safely treated on an outpatient basis. The use of the International Normalized Ratio (INR) has made better estimates of prothrombin time possible, and patients can be maintained in a narrow therapeutic range. Postoperative hemorrhage can be avoided or controlled with local hemostatic agents.

  13. Surface texture measurement for dental wear applications

    NASA Astrophysics Data System (ADS)

    Austin, R. S.; Mullen, F.; Bartlett, D. W.

    2015-06-01

    The application of surface topography measurement and characterization within dental materials science is highly active and rapidly developing, in line with many modern industries. Surface measurement and structuring is used extensively within oral and dental science to optimize the optical, tribological and biological performance of natural and biomimetic dental materials. Although there has historically been little standardization in the use and reporting of surface metrology instrumentation and software, the dental industry is beginning to adopt modern areal measurement and characterization techniques, especially as the dental industry is increasingly adopting digital impressioning techniques in order to leverage CAD/CAM technologies for the design and construction of dental restorations. As dental treatment becomes increasingly digitized and reliant on advanced technologies such as dental implants, wider adoption of standardized surface topography and characterization techniques will become evermore essential. The dental research community welcomes the advances that are being made in surface topography measurement science towards realizing this ultimate goal.

  14. Dental home: Patient centered dentistry

    PubMed Central

    Girish Babu, K. L.; Doddamani, G. M.

    2012-01-01

    Early childhood dental caries occurs in all racial and socioeconomic groups; however, it tends to be more prevalent in children in families belonging to the low-income group, where it is seen in epidemic proportions. Dental caries results from an overgrowth of specific organisms that are a part of normally occurring human flora. Human dental flora is site specific, and an infant is not colonized until the eruption of the primary dentition at approximately 6 to 30 months of age. The most likely source of inoculation of an infant's dental flora is the mother, or another intimate care provider, shared utensils, etc. Decreasing the level of cariogenic organisms in the mother's dental flora at the time of colonization can significantly impact the child's redisposition to caries. To prevent caries in children, high-risk individuals must be identified at an early age (preferably high-risk mothers during prenatal care), and aggressive strategies should be adopted, including anticipatory guidance, behavior modifications (oral hygiene and feeding practices), and establishment of a dental home by 1 year of age for children deemed at risk. PMID:24478960

  15. Development and evaluation of an articulated registration algorithm for human skeleton registration.

    PubMed

    Yip, Stephen; Perk, Timothy; Jeraj, Robert

    2014-03-21

    Accurate registration over multiple scans is necessary to assess treatment response of bone diseases (e.g. metastatic bone lesions). This study aimed to develop and evaluate an articulated registration algorithm for the whole-body skeleton registration in human patients. In articulated registration, whole-body skeletons are registered by auto-segmenting into individual bones using atlas-based segmentation, and then rigidly aligning them. Sixteen patients (weight = 80-117 kg, height = 168-191 cm) with advanced prostate cancer underwent the pre- and mid-treatment PET/CT scans over a course of cancer therapy. Skeletons were extracted from the CT images by thresholding (HU>150). Skeletons were registered using the articulated, rigid, and deformable registration algorithms to account for position and postural variability between scans. The inter-observers agreement in the atlas creation, the agreement between the manually and atlas-based segmented bones, and the registration performances of all three registration algorithms were all assessed using the Dice similarity index-DSIobserved, DSIatlas, and DSIregister. Hausdorff distance (dHausdorff) of the registered skeletons was also used for registration evaluation. Nearly negligible inter-observers variability was found in the bone atlases creation as the DSIobserver was 96 ± 2%. Atlas-based and manual segmented bones were in excellent agreement with DSIatlas of 90 ± 3%. Articulated (DSIregsiter = 75 ± 2%, dHausdorff = 0.37 ± 0.08 cm) and deformable registration algorithms (DSIregister = 77 ± 3%, dHausdorff = 0.34 ± 0.08 cm) considerably outperformed the rigid registration algorithm (DSIregsiter = 59 ± 9%, dHausdorff = 0.69 ± 0.20 cm) in the skeleton registration as the rigid registration algorithm failed to capture the skeleton flexibility in the joints. Despite superior skeleton registration performance, deformable registration algorithm failed to preserve the local rigidity of bones as over 60% of the skeletons

  16. Development and evaluation of an articulated registration algorithm for human skeleton registration

    NASA Astrophysics Data System (ADS)

    Yip, Stephen; Perk, Timothy; Jeraj, Robert

    2014-03-01

    Accurate registration over multiple scans is necessary to assess treatment response of bone diseases (e.g. metastatic bone lesions). This study aimed to develop and evaluate an articulated registration algorithm for the whole-body skeleton registration in human patients. In articulated registration, whole-body skeletons are registered by auto-segmenting into individual bones using atlas-based segmentation, and then rigidly aligning them. Sixteen patients (weight = 80-117 kg, height = 168-191 cm) with advanced prostate cancer underwent the pre- and mid-treatment PET/CT scans over a course of cancer therapy. Skeletons were extracted from the CT images by thresholding (HU>150). Skeletons were registered using the articulated, rigid, and deformable registration algorithms to account for position and postural variability between scans. The inter-observers agreement in the atlas creation, the agreement between the manually and atlas-based segmented bones, and the registration performances of all three registration algorithms were all assessed using the Dice similarity index—DSIobserved, DSIatlas, and DSIregister. Hausdorff distance (dHausdorff) of the registered skeletons was also used for registration evaluation. Nearly negligible inter-observers variability was found in the bone atlases creation as the DSIobserver was 96 ± 2%. Atlas-based and manual segmented bones were in excellent agreement with DSIatlas of 90 ± 3%. Articulated (DSIregsiter = 75 ± 2%, dHausdorff = 0.37 ± 0.08 cm) and deformable registration algorithms (DSIregister = 77 ± 3%, dHausdorff = 0.34 ± 0.08 cm) considerably outperformed the rigid registration algorithm (DSIregsiter = 59 ± 9%, dHausdorff = 0.69 ± 0.20 cm) in the skeleton registration as the rigid registration algorithm failed to capture the skeleton flexibility in the joints. Despite superior skeleton registration performance, deformable registration algorithm failed to preserve the local rigidity of bones as over 60% of the

  17. Dental Attitudes, Perceptions, and Treatment Needs in a University Population.

    ERIC Educational Resources Information Center

    Cohen, Leonard A.; And Others

    1980-01-01

    Dental attitudes of college students were examined: frequency of past visits; subceptibility to dental conditions; seriousness, preventability, and treatability of dental conditions; and satisfaction with dentists, practices, and other dental conditions. (Authors/CJ)

  18. Access to Dental Providers in Pennsylvania

    PubMed Central

    Baird, Matthew D.; Baird, Michelle K.; Vesely, Joseph V.

    2016-01-01

    Abstract Ensuring access to dental care, particularly for children, is a significant policy concern in the United States. Many factors affect access on both the provider and patient sides. This study examines an important factor in the ability to access dental care: the distribution and availability of dental health providers. The authors assess providers across the counties of Pennsylvania, primarily using data from the 2013 Survey of Dentists and Dental Hygienists administered by the Pennsylvania Department of Health. To identify possible dental provider shortages in Pennsylvania counties, the authors assessed ten indicators of access to dental providers. They find significant variation in the indicators across Pennsylvania counties. PMID:28083429

  19. Medical insurance for dental sleep medicine.

    PubMed

    Lipsey, Marty R

    2012-04-01

    Over the last 5 to 7 years, dental teams have mastered the art and science of processing dental insurance for their patients but have major difficulties learning how to help their patients when it comes to medical insurance. This article attempts to provide a basic guide for the dental team in coding, billing, and processing of major medical insurance for dental sleep medicine. Although there is certainly a learning curve for the dental team in this endeavor, the "patient and physician friendly" dental sleep medicine practice is a model that will help to assure growth and success.

  20. Computer-assisted three-dimensional surgical planning: 3D virtual articulator: technical note.

    PubMed

    Ghanai, S; Marmulla, R; Wiechnik, J; Mühling, J; Kotrikova, B

    2010-01-01

    This study presents a computer-assisted planning system for dysgnathia treatment. It describes the process of information gathering using a virtual articulator and how the splints are constructed for orthognathic surgery. The deviation of the virtually planned splints is shown in six cases on the basis of conventionally planned cases. In all cases the plaster models were prepared and scanned using a 3D laser scanner. Successive lateral and posterior-anterior cephalometric images were used for reconstruction before surgery. By identifying specific points on the X-rays and marking them on the virtual models, it was possible to enhance the 2D images to create a realistic 3D environment and to perform virtual repositioning of the jaw. A hexapod was used to transfer the virtual planning to the real splints. Preliminary results showed that conventional repositioning could be replicated using the virtual articulator.

  1. 3D-printing and mechanics of bio-inspired articulated and multi-material structures.

    PubMed

    Porter, Michael M; Ravikumar, Nakul; Barthelat, Francois; Martini, Roberto

    2016-12-21

    3D-printing technologies allow researchers to build simplified physical models of complex biological systems to more easily investigate their mechanics. In recent years, a number of 3D-printed structures inspired by the dermal armors of various fishes have been developed to study their multiple mechanical functionalities, including flexible protection, improved hydrodynamics, body support, or tail prehensility. Natural fish armors are generally classified according to their shape, material and structural properties as elasmoid scales, ganoid scales, placoid scales, carapace scutes, or bony plates. Each type of dermal armor forms distinct articulation patterns that facilitate different functional advantages. In this paper, we highlight recent studies that developed 3D-printed structures not only to inform the design and application of some articulated and multi-material structures, but also to explain the mechanics of the natural biological systems they mimic.

  2. Optimal control/structure integrated design of a flexible space platform with articulated appendages

    NASA Technical Reports Server (NTRS)

    Kelkar, Atul G.; Alberts, Thomas E.

    1991-01-01

    A complete set of closed form symbolic equations are developed for a 2-D model of a system comprised of a flexible platform with articulated appendages. The system considered has a flexible two link manipulator, with joint compliance, at one end of the flexible platform and an articulated antenna on the other end. The model is formulated using a Lagrangian approach which incorporates homogeneous transformation matrices, similar to those typically seen in the robotics literature, for the kinematic representation. The integrated control/structure design strategy considered emphasizes rapid system response and minimal structural weight. Constraints are included to keep antenna pointing error to a minimum, and at the same time achieve accurate end point positioning of the manipulator with minimal oscillations.

  3. Dynamical changes of occlusion and articulation during treatment of mandibular angle fractures.

    PubMed

    Baltrusaityte, Ausra; Surna, Algimantas; Pileicikiene, Gaivile; Kubilius, Ricardas; Gleiznys, Alvydas; Baltrusaitis, Marijus

    2013-01-01

    Outcomes of mandibular fractures were stated as frequent reason of temporomandibular joint dysfunctions. The objective of this study was to evaluate dynamical changes of occlusion and articulation during treatment of mandibular angle fractures. 12 subjects with mandibular angle fractures underwent analysis of occlusion and articulation in all stages of healing. Findings of investigations were presented in Posselt's and intercondylar axis diagrams, occlusiograms and relative force vs. time graphs. Comparison of results in first day, 1, 3 and 6 months after trauma showed that despite typical process of fragments healing and good fixation but with insufficiently balanced occlusion and posttraumatic discoordination of muscle activity first signs of TMJ articular discs dysfunction were found. Our results confirm the concept that early rehabilitation of mandibular function and occlusion are essential to prevent developing functional disorders of TMJ.

  4. Articulation of Conceptual Knowledge and Argumentation Practices by High School Students in Evolution Problems

    NASA Astrophysics Data System (ADS)

    de Lima Tavares, Marina; Jiménez-Aleixandre, María-Pilar; Mortimer, Eduardo F.

    2010-06-01

    The oral arguments of 12th grade students while solving tasks related to evolution are examined. Two groups ( N = 45), taught by the same teacher, were studied during a complete teaching sequence. The paper focuses on data from the last sessions, devoted to solving problems in small groups, problems related to different dimensions of the evolutionary model. Data include video recordings, the students’ written productions and the researcher (first author) field notes. The objective is to examine the process of articulation of students’ argumentation practices with their use of evolutionary models. The results show that participants were able to apply notions such as common ancestors, radiation, or gradualism to different contexts. The arguments required the articulation of evolution notions with argumentative practices as coordinating evidence with claims at different epistemic levels. The influence of the teacher’s strategies in the students’ role is discussed.

  5. Speech Articulator and User Gesture Measurements Using Micropower, Interferometric EM-Sensore

    SciTech Connect

    Holzrichter, J.F.

    2000-09-15

    Very low power, GHz frequency, ''radar-like'' sensors can measure a variety of motions produced by a human user of machine interface devices. These data can be obtained ''at a distance'' and can measure ''hidden'' structures. Measurements range from acoustic induced 10-micron amplitude vibrations of vocal tract tissues, to few centimeter human speech articulator motions, to meter-class motions of the head, hands, or entire body. These EM sensors measure ''fringe motions' as reflected EM waves are mixed with a local (homodyne) reference wave. These data, when processed using models of the system being measured, provide real time states of interface positions vs. time. An example is speech articulator positions vs. time in the user's body. This information appears to be useful for a surprisingly wide range of applications ranging from speech coding and recognition, speaker or object identification, noise cancellation, hand or head motions for cursor direction, and other applications.

  6. Speech Articulator and User Gesture Measurements Using Micropower, Interferometric EM-Sensors

    SciTech Connect

    Holzrichter, J F; Ng, L C

    2001-02-06

    Very low power, GHz frequency, ''radar-like'' sensors can measure a variety of motions produced by a human user of machine interface devices. These data can be obtained ''at a distance'' and can measure ''hidden'' structures. Measurements range from acoustic induced, 10-micron amplitude vibrations of vocal tract tissues, to few centimeter human speech articulator motions, to meter-class motions of the head, hands, or entire body. These EM sensors measure ''fringe motions'' as reflected EM waves are mixed with a local (homodyne) reference wave. These data, when processed using models of the system being measured, provide real time states of interface positions or other targets vs. time. An example is speech articulator positions vs. time in the user's body. This information appears to be useful for a surprisingly wide range of applications ranging from speech coding synthesis and recognition, speaker or object identification, noise cancellation, hand or head motions for cursor direction, and other applications.

  7. Multi-scale 2D tracking of articulated objects using hierarchical spring systems.

    PubMed

    Artner, Nicole M; Ion, Adrian; Kropatsch, Walter G

    2011-04-01

    This paper presents a flexible framework to build a target-specific, part-based representation for arbitrary articulated or rigid objects. The aim is to successfully track the target object in 2D, through multiple scales and occlusions. This is realized by employing a hierarchical, iterative optimization process on the proposed representation of structure and appearance. Therefore, each rigid part of an object is described by a hierarchical spring system represented by an attributed graph pyramid. Hierarchical spring systems encode the spatial relationships of the features (attributes of the graph pyramid) describing the parts and enforce them by spring-like behavior during tracking. Articulation points connecting the parts of the object allow to transfer position information from reliable to ambiguous parts. Tracking is done in an iterative process by combining the hypotheses of simple trackers with the hypotheses extracted from the hierarchical spring systems.

  8. Curricula for the teaching of complete dentures in Spanish and Portuguese dental schools

    PubMed Central

    Castillo-de Oyagüe, Raquel; Albaladejo, Alberto

    2013-01-01

    Objectives: Given the need to ensure that dentists are sufficiently skilled to offer the best possible care to their patients, this study aims to evaluate the teaching methods and clinical experience achieved by undergraduate dental students in Spain and Portugal as regards complete dentures. Study design: In February 2011, a questionnaire seeking information about the preclinical and clinical teaching of complete dentures was e-mailed to all Spanish and Portuguese dental schools with fully developed undergraduate degree dental programs. Results: A response rate of 82.6% was obtained. The distribution of lectures and hours spent at the laboratory and in clinical activities revealed that teaching complete dentures is eminently a practical issue, this being mostly performed by full-time prosthodontists. All surveyed schools teach the design of the record base, and most of them instruct students in the mounting of teeth in wax. Most schools (94.7%) used a semiadjustable articulator, alginate for primary impressions (73.7%) and elastomeric materials in border-molded custom trays for final impressions (68.4%). In most schools, within the clinical setting students work in pairs, the mean student/ professional staff member ratio being 2.3 ± 0.7. Most schools perform a competence-based assessment (83.3%), although innovative techniques such as problem-based learning are still rarely applied. On average, the students emplaced 1.8 ± 1.2 complete dentures during their clinical training, ranging from 0 to 4, although no clear trend was seen as regards the minimum number of dentures to be made for graduating. Conclusions: Variations in teaching programs and clinical experience concerning complete denture curricula among Spanish and Portuguese dental schools are evident, but all the schools base their teaching mainly on preclinical and clinical practice. However, the low number of dentures made by student per year seems insufficient to ensure clinical skills and cope with

  9. Costing dental restorations in public sector dental clinics.

    PubMed

    Khairiyah, Abdul Muttalib; Razak, Ishak Abdul; Raja-Latifah, Raja Jalludin; Tan, Bee Siew; Norain, Abu Talib; Noor-Aliyah, Ismail; Natifah, Che Salleh; Rauzi, Ismail

    2009-04-01

    The objective of this study is to share cost analysis methodology and to obtain cost estimates for posterior restorations in public sector dental clinics. Two urban and 2 rural dental clinics in Selangor state were selected. Only cases of 1 posterior restoration per visit by dental officers were included over 6 months. One capsulated amalgam type, 1 capsulated tooth-colored, and 1 non-capsulated tooth-colored material were selected. A clinical pathway form was formulated to collect data per patient. Annual capital and recurrent expenditures were collected per clinic. The mean cost of an amalgam restoration was RM 30.96 (sdRM 7.86); and tooth-colored restorations ranged from RM 33.00 (sdRM 8.43) to RM 41.10 (sdRM 10.61). Wherein 1 USD = RM 2.8. Restoration costs were 35% to 55% higher in clinics in rural areas than in urban areas. The findings demonstrate economy of scale for clinic operation and restoration costs with higher patient load. Costs per restoration were higher in rural than in urban dental clinics. More studies are recommended to address the dearth of dental costs data in Malaysia.

  10. Component analysis of dental porcelain for assisting dental identification.

    PubMed

    Aboshi, H; Takahashi, T; Komuro, T

    2006-12-01

    The fluorescence of porcelain crowns recovered from the mouth of an unknown murder victim, and several control porcelain samples, were examined by fluorescent examination lamps. The fluorescence from two of the control samples was quite similar to that from the porcelain crowns recovered from the victim. To increase the objectivity of the results by quantitative analysis, the composition of each porcelain crown and control sample was also evaluated by wave dispersion X-ray microanalyser. The elements detected from the porcelain crowns of the victim matched those of two of the porcelain samples. Later, the antemortem dental records and radiographs of the victim were obtained through a dentist, who had recognized the name of the porcelain manufacturer in a postmortem dental information request placed on the Japanese Dental Association web page. Although component analysis of dental porcelain may be an effective means of assisting dental identification, a more rapid and non-destructive analysis for detecting the elements is required. The energy dispersive X-ray fluorescence (EDXRF) spectrometer was used for a pilot study of identification of porcelain composition.

  11. EFFECTS OF MOUTHING AND INTERLOCUTOR PRESENCE ON MOVEMENTS OF VISIBLE VS. NON-VISIBLE ARTICULATORS.

    PubMed

    Bicevskis, Katie; de Vries, Jonathan; Green, Laurie; Heim, Johannes; Božič, Jurij; D'Aquisto, Joe; Fry, Michael; Sadlier-Brown, Emily; Tkachman, Oksana; Yamane, Noriko; Gick, Bryan

    2016-01-01

    Speakers take into account what information a conversation partner requires in a given context in order to best understand an utterance. Despite growing evidence showing that movements of visible articulators such as the lips are augmented in mouthed speech relative to vocalized speech, little to date has been done comparing this effect in visible vs. non-visible articulators. In addition, no studies have examined whether interlocutor engagement differentially impacts these. Building on a basic present/not-present design, we investigated whether presence of audible speech information and/or an interlocutor affect the movements of the lips and the tongue. Participants were asked to a) speak or b) mouth three target syllables in interlocutor-present and interlocutor-not-present conditions, while lip and tongue movements were recorded using video and ultrasound imaging. Results show that lip protrusion was greater in mouthed conditions compared to vocalized ones and tongue movements were either attenuated (/wa/) or unaffected (/ri/, /ra/) by these same conditions, indicating differential effects for the visible and non-visible articulators in the absence of an auditory signal. A significant interaction between the social engagement and vocalizing conditions in reference to lip aperture showed that participants produced smaller lip apertures when vocalizing alone, as compared to when in the presence of an interlocutor. However, measures of lip protrusion failed to find an effect of social engagement. We conclude that speakers make use of both auditory and visual modalities in the presence of an interlocutor, and that when acoustic information is unavailable, compensatory increases are made in the visual domain. Our findings shed new light on the multimodal nature of speech, and pose new questions about differential adaptations made by visible and non-visible articulators in different speech conditions.

  12. Investigation of Blade Impulsive Noise on a Scaled Fully Articulated Rotor System

    NASA Technical Reports Server (NTRS)

    Scheiman, James; Hoad, Danny R.

    1977-01-01

    Helicopter impulsive noise tests were conducted in the Langley V/STOL tunnel with an articulated rotor system. The tests demonstrated that impulsive noise could be simulated for low-speed forward flight with low descent rates and also in the high-speed level flight. For the low forward speed condition, the noise level was highly sensitive to small changes in descent rate. For the high-speed condition, the noise level was increased with an increase in rotor thrust.

  13. Dynamic Information Networks: Geometry, Topology and Statistical Learning for the Articulation of Structure

    DTIC Science & Technology

    2015-06-23

    AFRL-OSR-VA-TR-2015-0143 DYNAMIC INFORMATION NETWORKS: GEOMETRY, TOPOLOGY, AND STATISTICAL LEARNING FOR THE ARTICULATION OF STRUCTURE Daniel Rockmore...and machine learning . 15. SUBJECT TERMS Information networks, machine learning , link prediction, hyperbolic geometry, multiscale networks, complex...ideas  from  linear  algebra,  markov  processes,  diffusion  networks,  differential   geometry,  and  machine   learning

  14. Clinical laboratory technician to clinical laboratory scientist articulation and distance learning.

    PubMed

    Crowley, J R; Laurich, G A; Mobley, R C; Arnette, A H; Shaikh, A H; Martin, S M

    1999-01-01

    Laboratory workers and educators alike are challenged to support access to education that is current and provides opportunities for career advancement in the work place. The clinical laboratory science (CLS) program at the Medical College of Georgia in Augusta developed a clinical laboratory technician (CLT) to CLS articulation option, expanded it through distance learning, and integrated computer based learning technology into the educational process over a four year period to address technician needs for access to education. Both positive and negative outcomes were realized through these efforts. Twenty-seven students entered the pilot articulation program, graduated, and took a CLS certification examination. Measured in terms of CLS certification, promotions, pay raises, and career advancement, the program described was a success. However, major problems were encountered related to the use of unfamiliar communication technology; administration of the program at distance sites; communication between educational institutions, students, and employers; and competition with CLT programs for internship sites. These problems must be addressed in future efforts to provide a successful distance learning program. Effective methods for meeting educational needs and career ladder expectations of CLTs and their employers are important to the overall quality and appeal of the profession. Educational technology that includes computer-aided instruction, multimedia, and telecommunications can provide powerful tools for education in general and CLT articulation in particular. Careful preparation and vigilant attention to reliable delivery methods as well as students' progress and outcomes is critical for an efficient, economically feasible, and educationally sound program.

  15. Motor representations of articulators contribute to categorical perception of speech sounds.

    PubMed

    Möttönen, Riikka; Watkins, Kate E

    2009-08-05

    Listening to speech modulates activity in human motor cortex. It is unclear, however, whether the motor cortex has an essential role in speech perception. Here, we aimed to determine whether the motor representations of articulators contribute to categorical perception of speech sounds. Categorization of continuously variable acoustic signals into discrete phonemes is a fundamental feature of speech communication. We used repetitive transcranial magnetic stimulation (rTMS) to temporarily disrupt the lip representation in the left primary motor cortex. This disruption impaired categorical perception of artificial acoustic continua ranging between two speech sounds that differed in place of articulation, in that the vocal tract is opened and closed rapidly either with the lips or the tip of the tongue (/ba/-/da/ and /pa/-/ta/). In contrast, it did not impair categorical perception of continua ranging between speech sounds that do not involve the lips in their articulation (/ka/-/ga/ and /da/-/ga/). Furthermore, an rTMS-induced disruption of the hand representation had no effect on categorical perception of either of the tested continua (/ba/-da/ and /ka/-/ga/). These findings indicate that motor circuits controlling production of speech sounds also contribute to their perception. Mapping acoustically highly variable speech sounds onto less variable motor representations may facilitate their phonemic categorization and be important for robust speech perception.

  16. Perception of Place of Articulation for Plosives and Fricatives in Noise✩

    PubMed Central

    Alwan, Abeer; Jiang, Jintao; Chen, Willa

    2010-01-01

    This study aims at uncovering perceptually-relevant acoustic cues for the labial versus alveolar place of articulation distinction in syllable-initial plosives {/b/,/d/,/p/,/t/} and fricatives {/f/,/s/,/v/,/z/} in noise. Speech materials consisted of naturally-spoken consonant-vowel (CV) syllables from four talkers where the vowel was one of {/a/,/i/,/u/}. Acoustic analyses using logistic regression show that formant frequency measurements, relative spectral amplitude measurements, and burst/noise durations are generally reliable cues for labial/alveolar classification. In a subsequent perceptual experiment, each pair of syllables with the labial/alveolar distinction (e.g., /ba,da/) was presented to listeners in various levels of signal-to-noise-ratio (SNR) in a 2-AFC task. A threshold SNR was obtained for each syllable pair using sigmoid fitting of the percent correct scores. Results show that the perception of the labial/alveolar distinction in noise depends on the manner of articulation, the vowel context, and interaction between voicing and manner of articulation. Correlation analyses of the acoustic measurements and threshold SNRs show that formant frequency measurements (such as F1 and F2 onset frequencies and F2 and F3 frequency changes) become increasingly important for the perception of labial/alveolar distinctions as the SNR degrades. PMID:21499546

  17. I Am Sure There May Be a Planet There: Student articulation of uncertainty in argumentation tasks

    NASA Astrophysics Data System (ADS)

    Buck, Zoë E.; Lee, Hee-Sun; Flores, Joanna

    2014-09-01

    We investigated how students articulate uncertainty when they are engaged in structured scientific argumentation tasks where they generate, examine, and interpret data to determine the existence of exoplanets. In this study, 302 high school students completed 4 structured scientific arguments that followed a series of computer-model-based curriculum module activities simulating the radial velocity and/or the transit method. Structured scientific argumentation tasks involved claim, explanation, uncertainty rating, and uncertainty rationale. We explored (1) how students are articulating uncertainty within the various elements of the task and (2) the relationship between the way the task is presented and the way students are articulating uncertainty. We found that (1) while the majority of students did not express uncertainty in either explanation or uncertainty rationale, students who did express uncertainty in their explanations did so scientifically without being prompted explicitly, (2) students' uncertainty ratings and rationales revealed a mix of their personal confidence and uncertainty related to science, and (3) if a task presented noisy data, students were less likely to express uncertainty in their explanations.

  18. Effect of visual biofeedback of posterior tongue movement on articulation rehabilitation in dysarthria patients.

    PubMed

    Yano, J; Shirahige, C; Oki, K; Oisaka, N; Kumakura, I; Tsubahara, A; Minagi, S

    2015-08-01

    Articulation is driven by various combinations of movements of the lip, tongue, soft palate, pharynx and larynx, where the tongue plays an especially important role. In patients with cerebrovascular disorder, lingual motor function is often affected, causing dysarthria. We aimed to evaluate the effect of visual biofeedback of posterior tongue movement on articulation rehabilitation in dysarthria patients with cerebrovascular disorder. Fifteen dysarthria patients (10 men and 5 women; mean age, 70.7 ± 10.3 years) agreed to participate in this study. A device for measuring the movement of the posterior part of the tongue was used for the visual biofeedback. Subjects were instructed to produce repetitive articulation of [ka] as fast and steadily as possible between a lungful with/without visual biofeedback. For both the unaffected and affected sides, the range of ascending and descending movement of the posterior tongue with visual biofeedback was significantly larger than that without visual biofeedback. The coefficient of variation for these movements with visual biofeedback was significantly smaller than that without visual biofeedback. With visual biofeedback, the range of ascent exhibited a significant and strong correlation with that of descent for both the unaffected and affected sides. The results of this study revealed that the use of visual biofeedback leads to prompt and preferable change in the movement of the posterior part of the tongue. From the standpoint of pursuing necessary rehabilitation for patients with attention and memory disorders, visualization of tongue movement would be of marked clinical benefit.

  19. Standard conforming involute gear metrology using an articulated arm coordinate measuring system

    NASA Astrophysics Data System (ADS)

    Härtig, Frank; Lin, Hu; Kniel, Karin; Shi, Zhaoyao

    2012-10-01

    Standard conforming involute gear measurements were taken by a manually operating articulated arm system and the respective task-specific measurement uncertainties were estimated. User-friendly templates were developed to provide almost unambiguous and repeatable measurement results. They allow the metrologist to easily detect and gather the single measurement points according to existing guidelines and standards commonly used in gear metrology. The research activities were carried out at the Physikalisch-Technische Bundesanstalt (PTB), Germany in the Department of Coordinate Metrology. Measurements were taken on a robust and highly accurate large gear measurement standard of PTB, in the following called the gear standard. This gear standard materializes a left-hand and a right-hand gear as well as a spur gear. The 1 m outside diameter of the gear standard is similar to the gears used in wind power plants. A commercial articulated arm coordinate measuring system was used for the measurements. A high temperature stability of ±0.2 °C was provided to minimize thermal influences. The results of profile and helix measurements will be presented. This worldwide first investigation, on the basis of a calibrated involute gear standard, gives users of the articulating arm system quantitative information on a task-specific performance of a representative gear measurement.

  20. Perceived speech rate: the effects of articulation rate and speaking style in spontaneous speech.

    PubMed

    Koreman, Jacques

    2006-01-01

    In this study, the effect of articulation rate and speaking style on the perceived speech rate is investigated. The articulation rate is measured both in terms of the intended phones, i.e., phones present in the assumed canonical form, and as the number of actual, realized phones per second. The combination of these measures reflects the deletion of phones, which is related to speaking style. The effect of the two rate measures on the perceived speech rate is compared in two listening experiments on the basis of a set of intonation phrases with carefully balanced intended and realized phone rates, selected from a German database of spontaneous speech. Because the balance between input-oriented (effort) and output-oriented (communicative) constraints may be different at fast versus slow speech rates, the effect of articulation rate is compared both for fast and for slow phrases from the database. The effect of the listeners' own speaking habits is also investigated to evaluate if listeners' perception is based on a projection of their own behavior as a speaker. It is shown that listener judgments reflect both the intended and realized phone rates, and that their judgments are independent of the constraint balance and their own speaking habits.

  1. Dental self-care among dentate adults: contrasting problem-oriented dental attenders and regular dental attenders.

    PubMed

    Gilbert, G H; Stoller, E P; Duncan, R P; Earls, J L; Campbell, A M

    2000-01-01

    Self-care behaviors are common and can act as substitutes for or supplements to formal health care services. We tested the hypothesis that problem-oriented dental attenders (POAs) report more dental self-care behaviors than do regular dental attenders (RAs), presumably as a substitute for professional care. The Florida Dental Care Study is a longitudinal cohort study of changes in oral health, in which we measured dental self-care behaviors related to three common dental problems: toothache pain, bleeding gums, and tooth loss. Despite using less dental care, POAs were less likely to report "conventional" methods as means to prevent the three dental problems; however, they were more likely to report that homemade remedies, topical medications, or mouthwashes were ways to prevent or treat these problems. POAs were also more likely to believe that "nothing can be done" to prevent these problems. Additionally, POAs had more negative dental attitudes, used less dental care during follow-up, had more dental disease, were the only persons who extracted at least one of their own teeth, and were more likely to use tobacco. With the exception of dental self-extractions, no single self-care belief or behavior distinguished POAs from RAs, nor were POAs likely to have different explanations for dental problems. Instead, the pattern was one of modest differences on a number of items. Although POAs use less dental care, they do not compensate by employing more "conventional" dental self-care behaviors, but report being more likely to employ "unconventional" behaviors. They also are more likely to believe that nothing can be done to prevent dental problems.

  2. Dental Students' Perceptions of Learning Value in PBL Groups with Medical and Dental Students Together versus Dental Students Alone.

    PubMed

    Amin, Maryam; Zulla, Rosslynn; Gaudet-Amigo, Gisele; Patterson, Steven; Murphy, Natalie; Ross, Shelley

    2017-01-01

    At a dental school in Canada, problem-based learning (PBL) sessions were restructured from an integrated dental-medical model to a separate dental model, resulting in three groups of students available for study: those who had participated in the two-year dental and medical combined, the one-year dental and medical combined, the one-year dental alone, and the two-year dental alone. The aim of this qualitative study was to examine the extent to which the PBL structure affected the dental students' perceptions of the learning value of PBL in the different models. A total of 34 first-, second-, and third-year dental students participated in six focus groups in May and June 2011 (34% of students in those total classes). Semistructured questions explored their experiences in the different PBL structures. The interviews were recorded and transcribed verbatim, and thematic analysis was employed. The results showed positive and negative perceptions for both the combined dental and medical settings and the settings with dental students alone. For students in the combined PBL groups, positive perceptions included gaining information from medical peers, motivation to learn, and interdisciplinary collaborations. The negative perceptions mainly related to irrelevant content, dominating medical students, and ineffective preceptors. Members of the separate dental groups were more positive about the content and felt a sense of belonging. They appreciated the dental preceptors but were concerned about the inadequacy of their medical knowledge. Overall, the dental students valued the combined PBL experience and appreciated the opportunity to learn with their medical colleagues. Close attention, however, must be paid to PBL content and the preceptor's role to optimize dental students' experience in combined medical and dental groups.

  3. Saliva and dental plaque.

    PubMed

    Rudney, J D

    2000-12-01

    Dental plaque is being redefined as oral biofilm. Diverse overlapping microbial consortia are present on all oral tissues. Biofilms are structured, displaying features like channels and projections. Constituent species switch back and forth between sessile and planktonic phases. Saliva is the medium for planktonic suspension. Several major functions can be defined for saliva in relation to oral biofilm. It serves as a medium for transporting planktonic bacteria within and between mouths. Bacteria in transit may be vulnerable to negative selection. Salivary agglutinins may prevent reattachment to surfaces. Killing by antimicrobial proteins may lead to attachment of dead cells. Salivary proteins form conditioning films on all oral surfaces. This contributes to positive selection for microbial adherence. Saliva carries chemical messengers which allow live adherent cells to sense a critical density of conspecifics. Growth begins, and thick biofilms may become resistant to antimicrobial substances. Salivary macromolecules may be catabolized, but salivary flow also may clear dietary substrates. Salivary proteins act in ways that benefit both host and microbe. All have multiple functions, and many do the same job. They form heterotypic complexes, which may exist in large micelle-like structures. These issues make it useful to compare subjects whose saliva functions differently. We have developed a simultaneous assay for aggregation, killing, live adherence, and dead adherence of oral species. Screening of 149 subjects has defined high killing/low adherence, low killing/high adherence, high killing/high adherence, and low killing/low adherence groups. These will be evaluated for differences in their flora.

  4. Medicaid dental coverage alone may not lower rates of dental emergency department visits.

    PubMed

    Fingar, Kathryn R; Smith, Mark W; Davies, Sheryl; McDonald, Kathryn M; Stocks, Carol; Raven, Maria C

    2015-08-01

    Medicaid was expanded to millions of individuals under the Affordable Care Act, but many states do not provide dental coverage for adults under their Medicaid programs. In the absence of dental coverage, patients may resort to costly emergency department (ED) visits for dental conditions. Medicaid coverage of dental benefits could help ease the burden on the ED, but ED use for dental conditions might remain a problem in areas with a scarcity of dentists. We examined county-level rates of ED visits for nontraumatic dental conditions in twenty-nine states in 2010 in relation to dental provider density and Medicaid coverage of nonemergency dental services. Higher density of dental providers was associated with lower rates of dental ED visits by patients with Medicaid in rural counties but not in urban counties, where most dental ED visits occurred. County-level Medicaid-funded dental ED visit rates were lower in states where Medicaid covered nonemergency dental services than in other states, although this difference was not significant after other factors were adjusted for. Providing dental coverage alone might not reduce Medicaid-funded dental ED visits if patients do not have access to dental providers.

  5. Differential diagnosis of dental fluorosis made by undergraduate dental students

    PubMed Central

    Rigo, Lilian; Lodi, Leodinei; Garbin, Raíssa Rigo

    2015-01-01

    ABSTRACT Objective To check knowledge of undergraduate dental students to make diagnosis of dental fluorosis with varying degrees of severity and choose its appropriate treatment. Methods Data were collected using a semi-structured questionnaire addressing knowledge of undergraduates based on ten images of mouths presenting enamel changes. Results Only three images were correctly diagnosed by most undergraduates; the major difficulty was in establishing dental fluorosis severity degree. Conclusion Despite much information about fluorosis conveyed during the Dentistry training, as defined in the course syllabus, a significant part of the students was not able to differentiate it from other lesions; they did not demonstrate expertise as to defining severity of fluorosis and indications for treatment, and could not make the correct diagnosis of enamel surface changes. PMID:26761552

  6. Curriculum Guidelines for Clinical Dental Hygiene.

    ERIC Educational Resources Information Center

    Journal of Dental Education, 1985

    1985-01-01

    The American Association of Dental Schools curriculum guidelines for clinical dental hygiene include definitions, notes on the interrelationship of courses, an overview of course objectives, and suggested primary educational goals, prerequisites, core content, specific objectives, sequencing, faculty, and facilities. (MSE)

  7. American Academy of Dental Sleep Medicine

    MedlinePlus

    ... Dentist Applications Now Accepted Join Us in Boston! Membership Join the American Academy of Dental Sleep Medicine ... and more. View Member Benefits... Join Now Renew Membership Diplomate Certification The American Board of Dental Sleep ...

  8. Curricular Guidelines for Teaching Dental Anatomy.

    ERIC Educational Resources Information Center

    Okeson, Jeffrey; Buckman, James

    1981-01-01

    Guidelines developed by the Section on Dental Anatomy and Occlusion of the American Association of Dental Schools for use by individual educational institutions as curriculum development aids are provided. (MLW)

  9. Dental Health Education: Rhetoric or Reality?

    ERIC Educational Resources Information Center

    Taub, Alyson

    1982-01-01

    Suggestions for facilitating dental health education programs in public schools include: (1) determining who will be responsible for dental health education; (2) involving parents; (3) using community health resources; and (4) assessing the results of programs. (JN)

  10. National Institute of Dental and Craniofacial Research

    MedlinePlus

    ... Internships for... High School and College Students Recent College Graduates Dental and Medical Students See All Careers & Training Careers Job Openings Careers in Dental Research Loan Repayment Programs NIH Loan Repayment Programs A–Z ...

  11. Financing dental care: trends in public and private expenditures for dental services.

    PubMed

    Bailit, Howard; Beazoglou, Tryfon

    2008-04-01

    This article examines the financing of dental care in the United States. The major issues addressed include the amount and sources of funds, the reasons for increased dental care expenditures, the comparison of dental care with other medical care expenditures, the policy implications of current trends, and some cautious predictions about the financing of dental care in the next 10 to 20 years. The supply of dental services is expected to increase substantially in the next 10 to 20 years with more dental school graduates, a new midlevel practitioner, and greater use of allied dental health personnel. Whether the supply of services will grow faster than the demand for care is unknown.

  12. Aesthetic management of dental fluorosis.

    PubMed

    Khandelwal, Vishal; Nayak, Ullal Anand; Nayak, Prathibha Anand; Ninawe, Nupur

    2013-05-22

    Significant numbers of patients visiting the paediatric dental clinics have aesthetically objectionable brown stains and desire treatment for them. Intrinsic tooth discolouration can be a significant aesthetic, and in some instances, functional, problem. Dental fluorosis, tetracycline staining, localised and chronological hypoplasia, and both amelogenesis and dentinogenesis imperfecta can all produce a cosmetically unsatisfactory dentition. The aetiology of intrinsic discolouration of enamel may sometimes be deduced from the patient's history, and one factor long associated with the problem has been a high level of fluoride intake. Optimal use of topical fluorides leads to a decrease in the caries prevalence but may show an increase in the prevalence of fluorosis staining because of metabolic alterations in the ameloblasts, causing a defective matrix formation and improper calcification. A 12-year-old male patient was screened at the dental clinic for routine dental care. He wanted us to remove and/or minimise the noticeable brown/yellow staining of his teeth. He requested the least invasive and most cost-effective treatment to change his smile. Various treatment modalities are present for the treatment of fluorosis stains. This report discusses the microabrasion technique in the patient having dental fluorosis.

  13. Dental surgery in ancient Egypt.

    PubMed

    Blomstedt, Patric

    2013-01-01

    Many different surgical procedures have over the years been attributed to the ancient Egyptians. This is also true regarding the field of dental surgery. The existence of dentists in ancient Egypt is documented and several recipes exist concerning dental conditions. However, no indications of dental surgery are found in the medical papyri or in the visual arts. Regarding the osteological material/mummies, the possible indications of dental surgery are few and weak. There is not a single example of a clear tooth extraction, nor of a filling or of an artificial tooth. The suggested examples of evacuation of apical abscesses can be more readily explained as outflow sinuses. Regarding the suggested bridges, these are constituted of one find likely dating to the Old Kingdom, and one possibly, but perhaps more likely, dating to the Ptolemaic era. Both seem to be too weak to have served any possible practical purpose in a living patient, and the most likely explanation would be to consider them as a restoration performed during the mummification process. Thus, while a form of dentistry did certainly exist in ancient Egypt, there is today no evidence of dental surgery.

  14. Aesthetic management of dental fluorosis

    PubMed Central

    Khandelwal, Vishal; Nayak, Ullal Anand; Nayak, Prathibha Anand; Ninawe, Nupur

    2013-01-01

    Significant numbers of patients visiting the paediatric dental clinics have aesthetically objectionable brown stains and desire treatment for them. Intrinsic tooth discolouration can be a significant aesthetic, and in some instances, functional, problem. Dental fluorosis, tetracycline staining, localised and chronological hypoplasia, and both amelogenesis and dentinogenesis imperfecta can all produce a cosmetically unsatisfactory dentition. The aetiology of intrinsic discolouration of enamel may sometimes be deduced from the patient's history, and one factor long associated with the problem has been a high level of fluoride intake. Optimal use of topical fluorides leads to a decrease in the caries prevalence but may show an increase in the prevalence of fluorosis staining because of metabolic alterations in the ameloblasts, causing a defective matrix formation and improper calcification. A 12-year-old male patient was screened at the dental clinic for routine dental care. He wanted us to remove and/or minimise the noticeable brown/yellow staining of his teeth. He requested the least invasive and most cost-effective treatment to change his smile. Various treatment modalities are present for the treatment of fluorosis stains. This report discusses the microabrasion technique in the patient having dental fluorosis. PMID:23704468

  15. Thalassemias and their dental implications.

    PubMed

    Cutando Soriano, Antonio; Gil Montoya, José Antonio; López-González Garrido, Juan de Dios

    2002-01-01

    Thalassemias constitute a form of anemia that pose clear problems in relation to dental treatment. Dental professionals must be aware of the treatment adaptations required in patients with severe forms of beta-thalassemia. Until medical research is able to afford a definitive solution to these diseases (thereby greatly simplifying the dental management of such patients), effort will continue to center on the improvement of available therapeutic modalities, with the aim of obtaining effective and inexpensive oral chelators and drugs that either individually or in combination allow increases in fetal hemoglobin levels. Undoubtedly, the use of such measures together with serial blood transfusions has made it possible for an ever increasing number of patients with beta-thalassemia to reach adult age, where the provision of integral rather than merely palliative dental treatment must be seriously considered. At present, the clinical orofacial manifestations caused by the erythroid mass expanding the facial bones - resulting in dental malocclusions and protrusions tend to be less intense as a result of early medical treatment. In the future, gene therapy may be expected to allow a normal facial appearance thanks to complete healing of the patient.

  16. Sedation in Japanese dental schools.

    PubMed Central

    Morse, Zac; Sano, Kimito; Fujii, Kazuyuki; Kanri, Tomio

    2004-01-01

    There is very little information about the practice of sedation in Japan. Despite the remarkable advances in dentistry, fear and anxiety continue to be significant deterrents for seeking dental services. Most dental procedures can fortunately be undertaken with the aid of sedation. A comprehensive survey of all the dental schools in Japan was carried out to determine what sedation practices were used in Japan. All 29 dental schools in Japan possessed a dedicated department of anesthesiology at the time of this survey. The survey attempted to determine the specific sedation methods (techniques, routes of administration, and agents used in sedation) as well as practices (monitoring, fasting, location, education, and fees involved in sedation). The results indicate that there was a broad range in sedation practices. The Japanese Dental Society of Anesthesiology may wish to examine the findings of this study and may wish to formulate guidelines appropriate for the practice of sedation in Japan. Others may also wish to compare their own practices with those of Japan. PMID:15497299

  17. [Dental health: relationship between dental caries and food consumption].

    PubMed

    González Sanz, Angel Miguel; González Nieto, Blanca Aurora; González Nieto, Esther

    2013-07-01

    Although the reduction and prevalence of dental caries in many countries has been largely associated with the use of fluorine and improving dental hygiene, eating habits also play a role in the development of caries. Fermentable carbohydrates characteristics of the food, rate of consumption, food protectors, the quality and quantity of saliva indices that determine the remineralization of teeth are factors to be considered. All these elements are analyzed through the sociodemographic, behavioral, physical and biological environment directly or indirectly with diet and caries.

  18. Diagnosis and management of dental wear.

    PubMed

    Harpenau, Lisa A; Noble, Warden H; Kao, Richard T

    2011-04-01

    Dental wear is loss of tooth structure resulting from erosion, attrition, abrasion, and, possibly, abfraction. Clinical/experimental data suggest no single damaging mechanism but rather simultaneous interaction of these destructive processes. The most important interaction is abrasion/attrition potentiated by dental erosion. Awareness of this pathosis is not well-appreciated by the public and dental professionals because the signs may be subtle. This article focuses on the recognition, diagnosis, and management of dental wear.

  19. Patient Satisfaction in Military Dental Treatment Facilities

    DTIC Science & Technology

    2006-03-07

    related to technical expertise, Crall and Morris (1988) and Abrams, Ayers and Vogt-Petterson (1986) found that patient satisfaction was not well ...mission of the Army Dental Care Dental Patient Satisfaction 93 System. Dental emergencies in deployed military populations have been well documented...that choice. The ratings of the beliefs about the care received were high as well . Mean scores on the seven belief questions Dental Patient Satisfaction

  20. Developing Teaching Expertise in Dental Education

    ERIC Educational Resources Information Center

    Lyon, Lucinda J.

    2009-01-01

    This exploratory study was designed to develop a baseline model of expertise in dental education utilizing the Dreyfus and Dreyfus continuum of skill acquisition. The goal was the development of a baseline model of expertise, which will contribute to the body of knowledge about dental faculty skill acquisition and may enable dental schools to…