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Sample records for bilateral intraoral vertical

  1. Unilateral mandibular advancement with bilateral intraoral vertical ramus osteotomy.

    PubMed

    Chung, Seung-Won; Jung, Hwi-Dong; Park, Hyung-Sik; Jung, Young-Soo

    2015-05-01

    Intraoral vertical ramus osteotomy (IVRO) is an effective surgical procedure that is used for the correction of mandibular prognathism. However, application of IVRO for mandibular advancement has been limited because of the instability of the proximal segments caused by the gap between the distal and proximal segments. We report a case of unilateral mandibular advancement with bilateral IVRO for the correction of facial asymmetry. This case shows possible application of bilateral IVRO for unilateral mandibular advancement without any means of fixation. PMID:25974825

  2. Avoiding condylar displacement after intraoral vertical ramus osteotomy.

    PubMed

    Ritto, Fabio; Parente, Eduardo; da Silveira, Henrique Martins; Medeiros, Paulo José; de Moraes, Márcio

    2010-05-01

    The intraoral vertical osteotomy is a versatile and simple technique usually applied to correct mandibular prognathism. Its greatest advantages include ease of performance and minimum neurosensory disturbances, whereas maxillomandibular fixation is pointed as its major disadvantage. Another important concern about this technique is condylar displacement, which may lead to temporomandibular dysfunction. Technical notes to avoid condylar luxation are discussed after 15 years of experience using this osteotomy as the technique of choice to correct mandibular prognathism. Three similar cases are presented, where 1 condyle was displaced from the glenoid fossa, resulting in mandibular deviation during function in patients requiring small mandibular setback. PMID:20485061

  3. Unilateral intraoral vertical ramus osteotomy and sagittal split ramus osteotomy for the treatment of asymmetric mandibles

    PubMed Central

    Lee, Jee-Ho; Park, Tae-Jun

    2015-01-01

    In surgery for facial asymmetry, mandibles can be classified into two types, rotational and translational, according to the required mandibular movements for surgery. During surgery for rotational mandibular asymmetry, a bilateral sagittal split ramus osteotomy (BSSRO) may cause a large bone gap between the proximal and distal segments as well as condylar displacement, resulting in a relapse of the temporomandibular joint disorder, especially in severe cases. The intraoral vertical ramus osteotomy has an advantage, in this respect, because it causes less rotational displacement of the proximal segment on the deviated side and even displaced or rotated condylar segments may return to their original physiologic position. Unilateral intraoral vertical ramus osteotomy (UIVRO) on the short side combined with contralateral SSRO was devised as an alternative technique to resolve the spatial problems caused by conventional SSRO in cases of severe rotational asymmetry. A series of three cases were treated with the previously suggested protocol and the follow-up period was analyzed. In serial cases, UIVRO combined with contralateral SSRO may avoid mediolateral flaring of the bone segments and condylar dislocation, and result in improved condition of the temporomandibular joint. UIVRO combined with contralateral SSRO is expected to be a useful technique for the treatment of rotational mandibular asymmetry. PMID:25922823

  4. Variation of plate fixation for mandibular advancement with intraoral vertical ramus osteotomy using endoscopically assisted intraoral rigid or semi-rigid internal fixation: Case series study: Postoperative condylar seating control for mandibular advancement.

    PubMed

    Hara, Shingo; Mitsugi, Masaharu; Tatemoto, Yukihiro

    2015-12-01

    The purpose of the present study was to evaluate the safety and efficacy associated with mandibular advancement by intraoral vertical ramus osteotomy (IVRO) with endoscopically assisted intraoral rigid or semi-rigid internal fixation. The study sample included all patients who had undergone an mandibular advancement by IVRO procedure with endoscopically assisted intraoral plate fixation from September 2008 to May 2012. An mandibular advancement by IVRO with endoscopically assisted intraoral rigid or semi-rigid internal fixation was used for mandibular advancement. The patients were analyzed prospectively, with more than 2 years of follow-up, and were evaluated in terms of functional results, postoperative complications, and skeletal stability. A total of 14 patients (bilateral, 7 patients with class II; unilateral, 7 patients with asymmetry) were included in the present study. The average degree of mandibular advancement was 5.5 ± 1.9 mm (range, 3-9 mm). Both the occlusal relationship and facial appearance in all patients were significantly improved by the surgical-orthodontic treatment, with no major harmful clinical symptoms. In addition, one-screw semi-rigid fixation could control postoperative passive condylar seating. This study showed that mandibular advancement by IVRO with endoscopically assisted, intraoral semi-rigid internal fixation offers a promising treatment alternative for patients with skeletal class II malocclusion or facial asymmetry. PMID:26610634

  5. Assessment of vertical root fractures using three imaging modalities: cone beam CT, intraoral digital radiography and film

    PubMed Central

    Kambungton, J; Janhom, A; Prapayasatok, S; Pongsiriwet, S

    2012-01-01

    Objectives The aim of this study was to assess the accuracy of cone beam CT (CBCT) in detecting vertical root fractures and to compare the accuracy with images from an intraoral sensor and from conventional intraoral film. Methods 60 extracted, single-rooted human teeth were divided equally into two groups: a control group of 30 teeth and an induced fracture group of 30 teeth. All teeth were randomly placed into sockets in six dry mandibles. Each tooth was imaged by three modalities: CBCT, intraoral digital radiography and intraoral F-speed film. Three beam angulations (an orthogonal projection and additional projections with ±20° horizontal shifts of the central ray) were used when radiographs were made using film and a digital sensor. Three oral and maxillofacial radiologists evaluated the presence of root fractures twice in each image modality using a five-point confidence rating scale. Areas under receiver operating characteristic curves (Az) were computed for each observer and modality and were tested for statistical differences using the Kruskal–Wallis test. Results There was no statistical difference in the performance of the three modalities (mean of Az values: CBCT = 0.811, film = 0.797 and sensor = 0.775; p = 0.771). Conclusions There was no significant difference between intraoral film, a high-resolution complementary metal oxide semiconductor digital imaging system and CBCT in detecting vertical root fractures in mandibular single-rooted teeth. PMID:22301636

  6. Combination of Mandibular Constriction and Intraoral Vertical Ramus Osteotomies for a Transverse Jaw Discrepancy

    PubMed Central

    Mitsugi, Masaharu; Hirose, Hisamitsu; Tatemoto, Yukihiro

    2015-01-01

    Background: The aim of the present study was to evaluate the treatment of patients developing a transverse jaw width discrepancy who exhibited class III malocclusion and/or facial asymmetry by a combination of mandibular constriction (MC) and intraoral vertical ramus osteotomies (IVROs). Subjects and methods: In a retrospective study, functional results, postoperative complications, and skeletal stability were analyzed for all the patients who had undergone MC and IVRO, with more than 2 years of follow-up. A mandibular midline osteotomy for constriction with lag screw technique and IVROs was used for MC and setback. Results: Sixteen patients were included in the present study. The average degree of MC was 6.34 mm. Both the occlusal relationship and facial appearance in all patients were significantly improved by the surgical orthodontic treatment, with no harmful clinical symptoms. In addition, our original MC using lag screw technique provided the most reliable results in terms of skeletal stability. Conclusions: This study showed that MC using lag screw technique gives a very stable mandibular width constriction, and the combination of MC and IVROs offers a promising treatment alternative for patients with mandibular prognathism developing a transverse jaw width discrepancy. PMID:26495234

  7. Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism

    PubMed Central

    Chen, Chun-Ming; Lai, Steven; Chen, Ker-Kong; Lee, Huey-Er

    2015-01-01

    Objective. To investigate the factors affecting intraoperative hemorrhage and postoperative sequelae after orthognathic surgery. Materials and Methods. Eighty patients with mandibular prognathism underwent surgical mandibular setback with intraoral vertical ramus osteotomy (IVRO). The correlation between the blood loss volume and postoperative VAS with the gender, age, and operating time was assessed using the t-test and Spearman rank correlation coefficient. The correlation between the magnitude of mandibular setback with the presence of TMJ clicking symptoms and lip sensation was also assessed. Results. The mean operating time and blood loss volume for men and women were 249.52 min and 229.39 min, and 104.03 mL and 86.12 mL, respectively. The mean VAS in men and women was 3.21 and 2.93, and 1.79 and 1.32 on the first and second postoperative days. There is no gender difference in the operating time, blood loss, VAS, TMJ symptoms, and lip numbness. The magnitude of mandibular setback was not correlated with immediate and long-term postoperative lip numbness. Conclusion. There are no gender differences in the intraoperative hemorrhage and postoperative sequelae (pain, lip numbness, and TMJ symptoms). In addition, neither symptom was significantly correlated with the amount of mandibular setback. PMID:26543855

  8. Bilateral fractures of the coronoid processes: differential diagnosis of intra-oral gunshot trauma and scavenging using a sheep crania model.

    PubMed

    Puskas, Cathy M

    2003-11-01

    Approximately half of the skeleton of an adult male (minus the cranium) was found in a forested part of Greater Vancouver, Canada, in August 2000 by the Royal Canadian Mounted Police (RCMP). Authorities ruled the death as suicide. The only compelling signs of perimortem trauma were symmetrically fractured coronoid processes of the mandible, which can be attributed to a gunshot in the mouth. However, the remains had also been scavenged by canids, raising a problem in differential diagnosis. Could canid scavenging produce bilateral fracturing of the mandible indistinguishable from gunshot wounds to the mouth? We found that canid scavengers could not mimic the type of damage to the mandible caused by intra-oral gunshot wounding using a sheep model (n = 20). Bilateral fracturing of the coronoid processes was found to be characteristic of intra-oral gunshot wounding, while canid scavengers typically ignore this region of the mandible. PMID:14640263

  9. Random Pattern Vertically Oriented, Partial Thickness Buccinator Myomucosal Flap for Intraoral Reconstruction:A Report of Two Cases

    PubMed Central

    Rahpeyma, Amin; khajehahmadi, Saeedeh

    2016-01-01

    Introduction: Reconstruction of the oral cavity with a flap design containing the buccal mucosa and buccinator muscle but excluding the facial artery and vein is the topic of these case reports. Case Reports: This article uses random pattern vertically oriented partial thickness buccinator myomucosal flap for intraoral reconstruction in two cases. The first was for lining the mandibular anterior vestibule in a trauma patient. The second was for oral side coverage of bone graft in special cleft patient. In both patients, this flap survived and good bone coverage with non-keratinized mucosa was obtained. Conclusion: Thin long buccal myomucosal flap not including facial artery and vein can survive. PMID:27429953

  10. Long-term changes in mandibular and facial widths after mandibular setback surgery using intraoral vertical ramus osteotomy.

    PubMed

    Choi, Y J; Ha, Y-D; Lim, H; Huh, J-K; Chung, C J; Kim, K-H

    2016-09-01

    This study was performed to evaluate the long-term changes in mandibular width, lower facial width, and ramus angulation after intraoral vertical ramus osteotomy (IVRO) and to identify the factors influencing these changes. This retrospective study included 53 consecutive patients with mandibular prognathism who underwent IVRO with (n=33) or without (n=20) Le Fort I osteotomy. Postero-anterior cephalograms and frontal facial photographs obtained before, 1 month after, and at least 24 months after IVRO were used for measurements. A linear mixed model and paired t-tests were used to analyze temporal changes and the associated influencing factors. The mandibular width increased immediately after surgery (P<0.05), but decreased continuously thereafter. The ramus angulation showed negligible change within the first month (P>0.05) and decreased thereafter up to approximately 36 months. The amounts of mandibular setback and posterior impaction and the length of time postoperative influenced these changes. The lower facial width changed, although inconsistently, within 3mm over time (P>0.05). In conclusion, the mandibular width increased after IVRO but seemed to normalize within approximately 3 years. The lower facial width did not reflect underlying skeletal changes. Therefore, long-term transverse changes after IVRO can be considered clinically irrelevant. PMID:27156429

  11. Bilateral asymmetries in max effort single-leg vertical jumps.

    PubMed

    Stephens, Thomas M; Lawson, Brooke R; Reiser, Raoul F

    2005-01-01

    While asymmetries in the lower extremity during jumping may have implications during rehabilitation, it is not clear if healthy subjects should be expected to jump equivalently on each leg. Therefore, the goal of this study was to determine if asymmetries exist in maximal effort single-leg vertical jumps. After obtaining university-approved informed consent, 13 men and 12 women with competitive volleyball playing experience and no injuries of the lower-extremity that would predispose them to asymmetries participated. After thorough warm-up, five maximal effort vertical jumps with countermovement were performed on each leg (random order) with ground reaction forces and lower extremity kinematics recorded. The best three jumps from each leg were analyzed, assigning the leg with the highest jump height average as the dominant side. Asymmetry was assessed by determining statistical significance in the dominant versus non-dominant sides (p < 0.05). A significant interaction existed between side and gender for thigh length and peak vertical ground reaction force. Women had a significantly shorter thigh and men a greater peak vertical ground reaction force on their dominant side. All other parameters were assessed as whole group. Jumps were significantly greater off the dominant leg (2.8 cm on average). No other differences between sides were observed. Significant differences in magnitude (p < 0.05) existed between the men and women in jump height, several anthropometric parameters, minimum ankle and hip angles, and vertical ground reaction forces (peak and average). In conclusion, though a person may jump slightly higher on one leg relative to the other, and women may jump slightly differently than men, the magnitude of the difference should be relatively small and due to the multi-factorial nature of jump performance, individual parameters related to performance may not be consistently different. PMID:15850125

  12. Intraoral neuropathy.

    PubMed

    Merrill, Robert L

    2004-10-01

    Chronic nonodontogenic toothache has been reported in the literature since the 1700s. This problem has followed a similar scenario since those first reports. The patient typically is misdiagnosed and then subjected to multiple unnecessary procedures, ultimately resulting in tooth extractions because of dentists and physicians being unaware of the existence of atypical odontalgia and other types of intraoral neuropathic pain that are treatable without sacrificing the teeth. This paper reviews the medications and procedures used to treat nonodontogenic toothache. PMID:15361317

  13. Bilateral and unilateral vertical ground reaction forces and leg asymmetries in soccer players

    PubMed Central

    Camara, J

    2016-01-01

    The purposes of this study were to assess unilateral and bilateral vertical jump performance characteristics, and to compare the vertical ground reaction force characteristics of the impulse and landing phase of a vertical jump between the dominant and non-dominant leg in soccer players. The sample consisted of 20 male soccer players (22.80 ± 2.71 years, 1.88 ± 0.06 m, 76.47 ± 8.80 kg) who competed in the third division of the Spanish football league. Vertical jump performance was determined by testing the impulse and landing phase of a bilateral vertical jump, dominant leg vertical jump and non-dominant leg vertical jump. Significant differences (p < 0.05) between dominant and non-dominant legs were found in counter movement jump (CMJ) flight time (LA = -2.38%, d = 0.33), CMJ flight height (LA = -4.55%, d = 0.33) and CMJ speed take-off (LA = -2.91%, d = 0.42). No significant differences were found between the dominant and non-dominant leg in the F1 and F2 magnitudes during the landing phase, the time from the first contact of the foot with the ground to the production of F1, the time from the second contact of the foot with the ground to the production of F2, and the time to stabilization of the landing phase. Although differences were found between the dominant and non-dominant leg in the impulse phase of the jump, no significant differences were found between dominant and non-dominant legs in the landing phase of vertical jump variables. PMID:27274112

  14. Bilateral and unilateral vertical ground reaction forces and leg asymmetries in soccer players.

    PubMed

    Yanci, J; Camara, J

    2016-06-01

    The purposes of this study were to assess unilateral and bilateral vertical jump performance characteristics, and to compare the vertical ground reaction force characteristics of the impulse and landing phase of a vertical jump between the dominant and non-dominant leg in soccer players. The sample consisted of 20 male soccer players (22.80 ± 2.71 years, 1.88 ± 0.06 m, 76.47 ± 8.80 kg) who competed in the third division of the Spanish football league. Vertical jump performance was determined by testing the impulse and landing phase of a bilateral vertical jump, dominant leg vertical jump and non-dominant leg vertical jump. Significant differences (p < 0.05) between dominant and non-dominant legs were found in counter movement jump (CMJ) flight time (LA = -2.38%, d = 0.33), CMJ flight height (LA = -4.55%, d = 0.33) and CMJ speed take-off (LA = -2.91%, d = 0.42). No significant differences were found between the dominant and non-dominant leg in the F1 and F2 magnitudes during the landing phase, the time from the first contact of the foot with the ground to the production of F1, the time from the second contact of the foot with the ground to the production of F2, and the time to stabilization of the landing phase. Although differences were found between the dominant and non-dominant leg in the impulse phase of the jump, no significant differences were found between dominant and non-dominant legs in the landing phase of vertical jump variables. PMID:27274112

  15. Lead isotopes reveal bilateral asymmetry and vertical continuity in the Hawaiian mantle plume.

    PubMed

    Abouchami, W; Hofmann, A W; Galer, S J G; Frey, F A; Eisele, J; Feigenson, M

    2005-04-14

    The two parallel chains of Hawaiian volcanoes ('Loa' and 'Kea') are known to have statistically different but overlapping radiogenic isotope characteristics. This has been explained by a model of a concentrically zoned mantle plume, where the Kea chain preferentially samples a more peripheral portion of the plume. Using high-precision lead isotope data for both centrally and peripherally located volcanoes, we show here that the two trends have very little compositional overlap and instead reveal bilateral, non-concentric plume zones, probably derived from the plume source in the mantle. On a smaller scale, along the Kea chain, there are isotopic differences between the youngest lavas from the Mauna Kea and Kilauea volcanoes, but the 550-thousand-year-old Mauna Kea lavas are isotopically identical to Kilauea lavas, consistent with Mauna Kea's position relative to the plume, which was then similar to that of present-day Kilauea. We therefore conclude that narrow (less than 50 kilometres wide) compositional streaks, as well as the larger-scale bilateral zonation, are vertically continuous over tens to hundreds of kilometres within the plume. PMID:15829954

  16. Intraoral Pain Disorders.

    PubMed

    Edens, Mary Hil; Khaled, Yasser; Napeñas, Joel J

    2016-08-01

    Those experiencing intraoral pain associated with dental and oral diseases are likely to pursue treatment from medical and dental providers. The causes for intraoral pain include odontogenic, periodontal, oral mucosal, or contiguous hard and soft tissue structures to the oral cavity. Providers should be vigilant when diagnosing these, as they should be among the first in their differential diagnoses to be ruled out. This review provides brief overviews of frequently encountered oral/dental diseases that cause intraoral pain, originating from the teeth, the surrounding mucosa and gingivae, tongue, bone, and salivary glands and their causes, features, diagnosis, and management strategies. PMID:27475507

  17. Intraoral venous malformation with phleboliths

    PubMed Central

    Mohan, Ravi Prakash S.; Dhillon, Manu; Gill, Navneet

    2011-01-01

    The most common type of vascular malformation is the venous malformation and these are occasionally associated with phleboliths. We report a case of a 45 year old woman with intraoral venous malformation with phleboliths. PMID:24151422

  18. Intraoral Lipoma: A Case Report

    PubMed Central

    Kumar, L. K. Surej; Kurien, Nikhil Mathew; Raghavan, Varun B.; Menon, P. Varun; Khalam, Sherin A.

    2014-01-01

    Lipomas are rare in oral and maxillofacial regions although they are the most common tumours of mesenchymal origin in human body. The etiology remains unclear. Various different theories explain the pathogenesis of this adipose tissue tumour and also different histological variants of oral lipoma have been given in literature. A case of intraoral lipoma occurring in mental region in a 77-year-old male is reported along with review of the literature. Wide surgical excision was performed and two-year followup showed excellent healing without any recurrence. Lipomas are benign soft tissue neoplasm of mature adipose tissue seen as a common entity in the head and neck region. Intraoral lipomas are a rare entity which may be noticed only during routine dental examinations. Most of them rarely cause pain, resulting in delay to seek treatment. It is mandatory for a clinician to diagnose intraoral lipomas using latest diagnostic methods and conservatively treat them without causing much discomfort. PMID:24592278

  19. Juvenile xanthogranuloma: unusual intraoral finding.

    PubMed

    Collins, L; Banks, R; Robinson, M

    2015-01-01

    Juvenile xanthogranuloma is a rare non-Langerhans cell histiocytosis that usually presents as a self-limiting dermatological condition in young children. Rarely, extracutaneous sites may also be involved. We report a case in a 3-year-old girl that presented intraorally as a solitary, well-defined, soft, purple palatal swelling. Patients with these rare intraoral lesions may present to dentists and subsequently to oral and maxillofacial surgeons. Diagnosis requires histopathological analysis and immunohistochemical staining. Further investigation from other specialties is required to rule out involvement of other organ systems. PMID:25300889

  20. Intraoral repair of cosmetic restorations.

    PubMed

    Denehy, G; Bouschlicher, M; Vargas, M

    1998-10-01

    The longevity of porcelain and composite resin restorations can often be prolonged by using sound principles, up-to-date materials, and judicious attention to repair when fracture problems arise. Careful case selection and correct usage of surface treatment agents, followed by the use of a quality bonding system and restorative materials, can result in a repair that exhibits excellent retention and natural color blending. This article outlines procedures and materials to repair both resin composite and porcelain intraorally. PMID:9891653

  1. Wireless Communication of Intraoral Devices and Its Optimal Frequency Selection

    PubMed Central

    Park, Hangue; Ghovanloo, Maysam

    2015-01-01

    This paper explores communication methods and frequencies for wireless intraoral electronic devices, by using an intraoral tongue drive system (iTDS) as a practical example. Because intraoral devices do not meet the operating conditions of the body channel communication, we chose radio frequency communication. We evaluated and compared three frequencies in industrial, scientific, and medical bands (27 MHz, 433.9 MHz, and 2.48 GHz) in terms of their data link performance based on path loss and radiation patterns over horizontal and vertical planes. To do so, we dynamically minimize the impedance mismatch caused by the varying oral environment by applying the adaptive impedance matching technique to 433.9 MHz and 2.48 GHz bands. Experimental results showed that 27 MHz has the smallest path loss in the near-field up to 39 cm separation between transmitter and receiver antennas. However, 433.9 MHz shows the best performance beyond 39 cm and offers a maximum operating distance of 123 cm with 0 dBm transmitter output power. These distances were obtained by a bit error rate test and verified by a link budget analysis and full functionality test of the iTDS with computer access. PMID:26236039

  2. Intraoral Digital Impression Technique: A Review.

    PubMed

    Ting-Shu, Su; Jian, Sun

    2015-06-01

    With the techniques of computer-aided design and computer-aided manufacturing (CAD/CAM) being applied in the field of prosthodontics, a concept of intraoral digital impressions was put forward in the early 1980s. It has drawn comprehensive attention from dentists and has been used for dental prosthesis fabrication in a number of cases. This new digital impression technique is expected to bring about absolute digitization to the mode of prosthodontics. A few published articles have indicated that dental prostheses fabricated from intraoral digital impressions have exhibited remarkable advantages over those from conventional impressions in several respects. The present review discusses intraoral digital impression techniques in terms of the following aspects: (1) categories and principles of intraoral digital impression devices currently available; (2) operating characteristics of the devices; and (3) comparison of the manipulation, accuracy, and repeatability between intraoral digital impression and conventional impression. PMID:25220390

  3. The outcome of intraoral onlay block bone grafts on alveolar ridge augmentations: A systematic review

    PubMed Central

    Aloy-Prósper, Amparo; Peñarrocha-Oltra, David; Peñarrocha-Diago, Maria A.

    2015-01-01

    Aim: The purpose of this study was to systematically review clinical studies examining the survival and success rates of implants placed with intraoral onlay autogenous bone grafts to answer the following question: do ridge augmentations procedures with intraoral onlay block bone grafts in conjunction with or prior to implant placement influence implant outcome when compared with a control group (guided bone regeneration, alveolar distraction, native bone or short dental implants.)? Material and Method: An electronic data banks and hand searching were used to find relevant articles on vertical and lateral augmentation procedures performed with intraoral onlay block bone grafts for dental implant therapy published up to October 2013. Publications in English, on human subjects, with a controlled study design –involving at least one group with defects treated with intraoral onlay block bone grafts, more than five patients and a minimum follow-up of 12 months after prosthetic loading were included. Two reviewers extracted the data. Results: A total of 6 studies met the inclusion criteria: 4 studies on horizontal augmentation and 2 studies on vertical augmentation. Intraoperative complications were not reported. Most common postsurgical complications included mainly mucosal dehiscences (4 studies), bone graft or membrane exposures (3 studies), complete failures of block grafts (2 studies) and neurosensory alterations (4 studies). For lateral augmentation procedures, implant survival rates ranged from 96.9% to 100%, while for vertical augmentation they ranged from 89.5% to 100%. None article studied the soft tissues healing. Conclusions: Survival and success rates of implants placed in horizontally and vertically resorbed edentulous ridges reconstructed with block bone grafts are similar to those of implants placed in native bone, in distracted sites or with guided bone regeneration. More surgical challenges and morbidity arise from vertical augmentations, thus short

  4. Intraoral somatosensory abnormalities in patients with atypical odontalgia – a controlled multicenter quantitative sensory testing study

    PubMed Central

    Baad-Hansen, Lene; Pigg, Maria; Ivanovic, Susanne El’Masry; Faris, Hanan; List, Thomas; Drangsholt, Mark; Svensson, Peter

    2013-01-01

    Intraoral somatosensory sensitivity in patients with atypical odontalgia (AO) has not been investigated systematically according to the most recent guidelines. The aims of this study were to: 1. Examine intraoral somatosensory disturbances in AO patients using healthy subjects as reference and 2. Evaluate the percent agreement between intraoral quantitative sensory testing (QST) and qualitative sensory testing (QualST). Forty-seven AO patients and 69 healthy controls were included at Universities of Washington, Malmö and Aarhus. In AO patients, intraoral somatosensory testing was performed on the painful site, the corresponding contralateral site and at thenar. In healthy subjects, intraoral somatosensory testing was performed bilaterally on the upper premolar gingiva and at thenar. Thirteen QST and 3 QualST parameters were evaluated at each site, z-scores were computed for AO patients based on the healthy reference material and LossGain scores were created. 87.3% of AO patients had QST abnormalities compared with controls. The most frequent somatosensory abnormalities in AO patients were somatosensory gain with regard to painful mechanical and cold stimuli and somatosensory loss with regard to cold detection and mechanical detection. The most frequent LossGain code was L0G2 (no somatosensory loss with gain of mechanical somatosensory function)(31.9% of AO patients). Percent agreement between corresponding QST and QualST measures of thermal and mechanical sensitivity ranged between 55.6 and 70.4% in AO patients and between 71.1 and 92.1% in controls. In conclusion, intraoral somatosensory abnormalities were commonly detected in AO patients and agreement between quantitative and qualitative sensory testing was good to excellent. PMID:23725780

  5. Intraoral somatosensory abnormalities in patients with atypical odontalgia--a controlled multicenter quantitative sensory testing study.

    PubMed

    Baad-Hansen, Lene; Pigg, Maria; Ivanovic, Susanne Eímasry; Faris, Hanan; List, Thomas; Drangsholt, Mark; Svensson, Peter

    2013-08-01

    Intraoral somatosensory sensitivity in patients with atypical odontalgia (AO) has not been investigated systematically according to the most recent guidelines. The aims of this study were to examine intraoral somatosensory disturbances in AO patients using healthy subjects as reference, and to evaluate the percent agreement between intraoral quantitative sensory testing (QST) and qualitative sensory testing (QualST). Forty-seven AO patients and 69 healthy control subjects were included at Universities of Washington, Malmö, and Aarhus. In AO patients, intraoral somatosensory testing was performed on the painful site, the corresponding contralateral site, and at thenar. In healthy subjects, intraoral somatosensory testing was performed bilaterally on the upper premolar gingiva and at thenar. Thirteen QST and 3 QualST parameters were evaluated at each site, z-scores were computed for AO patients based on the healthy reference material, and LossGain scores were created. Compared with control subjects, 87.3% of AO patients had QST abnormalities. The most frequent somatosensory abnormalities in AO patients were somatosensory gain with regard to painful mechanical and cold stimuli and somatosensory loss with regard to cold detection and mechanical detection. The most frequent LossGain code was L0G2 (no somatosensory loss with gain of mechanical somatosensory function) (31.9% of AO patients). Percent agreement between corresponding QST and QualST measures of thermal and mechanical sensitivity ranged between 55.6% and 70.4% in AO patients and between 71.1% and 92.1% in control subjects. In conclusion, intraoral somatosensory abnormalities were commonly detected in AO patients, and agreement between quantitative and qualitative sensory testing was good to excellent. PMID:23725780

  6. Intraoral scanning systems - a current overview.

    PubMed

    Zimmermann, M; Mehl, A; Mörmann, W H; Reich, S

    2015-01-01

    There is no doubt today about the possibilities and potential of digital impression-taking with the aid of intraoral optical impression systems, and the past few years have seen a considerable increase in the range of optical intraoral scanners available on the market. On the strength of numerous innovations and a wider range of indications in orthodontics and implantology, intraoral scanning systems appear to be a highly promising development for the future. Digital impression-taking with intraoral scanners has already shown itself in some respects to be clearly superior to conventional impression- taking. Particularly worthy of mention is the versatile integration of digital impressions into diagnostic and treatment concepts to provide a customizable healthcare solution for the patient. It remains exciting to look forward to future developments that will allow us to observe digital impression-taking--as with other digital applications already established in everyday life--becoming firmly established in the routine of dentistry and dental technology. This article presents an overview of the benefits and limitations of digital impression-taking using intraoral scanning systems, and includes a summary of all the relevant intraoral scanners available on the market at present. PMID:26110925

  7. Reliability of intra-oral quantitative sensory testing (QST) in patients with atypical odontalgia and healthy controls - a multicentre study.

    PubMed

    Baad-Hansen, L; Pigg, M; Yang, G; List, T; Svensson, P; Drangsholt, M

    2015-02-01

    The reliability of comprehensive intra-oral quantitative sensory testing (QST) protocol has not been examined systematically in patients with chronic oro-facial pain. The aim of the present multicentre study was to examine test-retest and interexaminer reliability of intra-oral QST measures in terms of absolute values and z-scores as well as within-session coefficients of variation (CV) values in patients with atypical odontalgia (AO) and healthy pain-free controls. Forty-five patients with AO and 68 healthy controls were subjected to bilateral intra-oral gingival QST and unilateral extratrigeminal QST (thenar) on three occasions (twice on 1 day by two different examiners and once approximately 1 week later by one of the examiners). Intra-class correlation coefficients and kappa values for interexaminer and test-retest reliability were computed. Most of the standardised intra-oral QST measures showed fair to excellent interexaminer (9-12 of 13 measures) and test-retest (7-11 of 13 measures) reliability. Furthermore, no robust differences in reliability measures or within-session variability (CV) were detected between patients with AO and the healthy reference group. These reliability results in chronic orofacial pain patients support earlier suggestions based on data from healthy subjects that intra-oral QST is sufficiently reliable for use as a part of a comprehensive evaluation of patients with somatosensory disturbances or neuropathic pain in the trigeminal region. PMID:25284726

  8. Reliability of intraoral quantitative sensory testing (QST) in patients with atypical odontalgia and healthy controls – a multicenter study

    PubMed Central

    Baad-Hansen, Lene; Pigg, Maria; Yang, Guangju; List, Thomas; Svensson, Peter; Drangsholt, Mark

    2014-01-01

    Summary The reliability of comprehensive intraoral quantitative sensory testing (QST) protocol has not been examined systematically in patients with chronic orofacial pain. The aim of the present multi-center study was to examine test-retest and inter-examiner reliability of intraoral QST measures in terms of absolute values and z-scores as well as within-session coefficients of variation (CV) values in patients with atypical odontalgia (AO) and healthy pain-free controls. Forty-five AO patients and 68 healthy controls were subjected to bilateral intraoral gingival QST and unilateral extratrigeminal QST (thenar) on three occasions (twice on one day by two different examiners and once approximately one week later by one of the examiners). Intraclass correlation coefficients and kappa values for inter-examiner and test-retest reliability were computed. Most of the standardized intraoral QST measures showed fair to excellent inter-examiner (9–12 of 13 measures) and test-retest (7–11 of 13 measures) reliability. Furthermore, no robust differences in reliability measures or within-session variability (CV) were detected between AO patients and the healthy reference group. These reliability results in chronic orofacial pain patients support earlier suggestions based on data from healthy subjects that intraoral QST is sufficiently reliable for use as a part of a comprehensive evaluation of patients with somatosensory disturbances or neuropathic pain in the trigeminal region. PMID:25284726

  9. Unilateral mandibular ramus elongation by intraoral distraction osteogenesis.

    PubMed

    Kofod, Thomas; Nørholt, Sven Erik; Pedersen, Thomas Klit; Jensen, John

    2005-03-01

    Successful correction of facial asymmetry by mandibular distraction osteogenesis relies on mastering vector control. Lack of necessary vector control continues to compromise the treatment modality. The purpose of this study was to describe a new simplified method for vector transfer and to evaluate this method according to the outcome and the efficacy of distraction osteogenesis in the correction of unilateral mandibular hypoplasia and asymmetry. Twenty-seven patients with unilateral hypoplasia of the mandibular ramus underwent unilateral mandibular distraction osteogenesis with intraoral distraction devices. Posterior-anterior and lateral cephalograms were analyzed by digitalization. Changes in sagittal, vertical, and transversal linear and angular dimensions after the distraction treatment were evaluated by measurements performed on headfilms taken before and after surgery. Means and variances were calculated for selected cephalometric variables for each time point. The differences between the control and the treatment side were calculated, statistically described, and compared with a paired Student t test. Correction of the mandibular asymmetry, chin position, and the canting of the occlusal plane was obtained in all patients clinically, as well as radiographically, by the use of intraoral unidirectional distraction osteogenesis. PMID:15750421

  10. 21 CFR 872.4130 - Intraoral dental drill.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  11. 21 CFR 872.4130 - Intraoral dental drill.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  12. 21 CFR 872.4130 - Intraoral dental drill.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  13. 21 CFR 872.4130 - Intraoral dental drill.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  14. 21 CFR 872.4130 - Intraoral dental drill.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Intraoral dental drill. 872.4130 Section 872.4130...) MEDICAL DEVICES DENTAL DEVICES Surgical Devices § 872.4130 Intraoral dental drill. (a) Identification. An intraoral dental drill is a rotary device intended to be attached to a dental handpiece to drill holes...

  15. 21 CFR 872.6890 - Intraoral dental wax.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  16. 21 CFR 872.6890 - Intraoral dental wax.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  17. 21 CFR 872.6890 - Intraoral dental wax.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  18. 21 CFR 872.6890 - Intraoral dental wax.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  19. 21 CFR 872.6890 - Intraoral dental wax.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Intraoral dental wax. 872.6890 Section 872.6890...) MEDICAL DEVICES DENTAL DEVICES Miscellaneous Devices § 872.6890 Intraoral dental wax. (a) Identification. Intraoral dental wax is a device made of wax intended to construct patterns from which custom made...

  20. Intraoral Superficial Angiomyxoma: A Case Report.

    PubMed

    Anehosur, Venkatesh; Adirajaiah, Sahana; Ghosh, Rajarshi

    2016-07-01

    Angiomyxomas are a group of relatively uncommon myxoid mesenchymal tumors associated with a high risk of local recurrence without any metastatic potential. Till date only five cases of intraoral superficial angiomyxoma have been reported. This is a case report of a middle aged Indian male patient diagnosed with superficial angiomyxoma of lower left buccal vestibule. PMID:27408472

  1. Bilateral cellulitis.

    PubMed

    Batra, Vivek; Baras, Alexander

    2015-01-01

    We present a case of bilateral lesions in a 50-year-old man, which were on first impression mistaken for and initially treated as bilateral cellulitis. We propose that bilateral cellulitis, as opposed to unilateral, is rare and that other aetiologies should be considered in evaluating a patient with bilateral lesions. The differential diagnosis includes stasis-dermatitis, lipodermatosclerosis, lymphoedema and vascular lesions such as Kaposi sarcoma, as was identified in this case. Early consultation with dermatology and biopsy in unclear cases mitigates the unnecessary use of prolonged antibiotics, antibiotic resistance and Clostridium difficile infections. HIV testing is an essential screening test in all adults who present with non-specific viral symptoms and rash. PMID:26392449

  2. Fixed drug eruptions with intraoral presentation

    PubMed Central

    Srivastava, Rahul; Bihari, Manorama; Bhuvan, Jyoti; Saad, Ahmed

    2015-01-01

    Fixed-drug eruption (FDE) is an unusual and rare adverse drug reaction. This type of reaction is actually a delayed type of hypersensitivity reaction that occurs as lesions recurring at the same skin site due to repeated intake of an offending drug. Here is a case report of a 58-year-old male patient who developed intraoral FDEs after ingestion of the first dose of ornidazole. PMID:26097341

  3. Complete mouth rehabilitation after transposition osteotomy based on intraoral scanning: an experimental approach.

    PubMed

    Güth, Jan-Frederik; Edelhoff, Daniel; Ihloff, Hela; Mast, Gerson

    2014-08-01

    This article describes the surgical and prosthodontic treatment of a patient with severe dysgnathia combined with amelogenesis imperfecta. To the authors' knowledge, this is the first treatment report to describe the application of intraoral scanning for a complete mouth reconstruction. After transposition osteotomy, the treatment included the simultaneous fabrication of antagonistic computer-aided design/computer-aided manufactured (CAD/CAM) long-term interim restorations for the maxilla and mandible and the establishment of a new centric relation position and adequate vertical dimension of occlusion. Particularly in complex situations, the major advantages of intraoral scanning can be identified as an extended magnification of the 3-dimensional digital data to control the preparation and impression at the dental office. However, the presented treatment revealed some deficiencies in the digital work flow that must be rectified. In combination with high-performance polymers, the CAD/CAM technology offers a wide range of new treatment options and simplifies the fabrication of long-term interim restorations. Although in the present treatment the esthetic and functional requirements of the patient were met, no published studies of this procedure have been based on intraoral scanning, and the approach has to be considered experimental. PMID:24529842

  4. Removal of sialoliths using the intraoral approach in 15 horses.

    PubMed

    Oreff, Gil L; Shiraki, Ryoji; Kelmer, Gal

    2016-06-01

    This study describes the use of an intraoral approach for sialolith removal in horses. All horses resumed their previous activity after surgery. Sialoliths were composed mainly of calcium carbonate, containing a nidus of plant material. The removal of sialoliths via an intraoral approach results in a high success rate with minimal complications. PMID:27247466

  5. Intraoral features and considerations in face transplantation.

    PubMed

    Wall, A; Bueno, E; Pomahac, B; Treister, N

    2016-03-01

    Face transplantation (FT) is a unique and novel addition to the field of reconstructive surgery, which offers new hope to facially disfigured individuals. This review provides an overview of FT, including clinical indications, immunological principles, and functional outcomes, as well as an in-depth characterization of the intraoral hard and soft tissue findings in the six patients transplanted to date at Brigham and Women's Hospital in Boston, MA, USA. Six FT recipients underwent comprehensive clinical and radiographic evaluation to assess their intraoral status, function, and overall health. The extra- and intraoral soft tissue was assessed via quantitative sensory testing. The vitality of the transplanted dental hard tissue was evaluated with clinically available testing methods. Native teeth and prostheses were also assessed. Sensation of transplanted oral mucosa varied based on time elapsed from FT, ranging from minimal at 3 months post-FT, to nearly complete recovery by approximately 24 months. There was mixed success with the integration of donor teeth (Patients 1, 4 and 6), including associated occlusal discrepancies. Mucosal complications included constriction at the donor/recipient interface (Patients 2 and 5) and solitary episodes of mucosal rejection presenting as lichenoid inflammation (Patients 2 and 4). Face transplantation represents a pivotal moment in the history of reconstructive surgery and transplant medicine, providing new optimism to patients with gross facial deformities. This report highlights the successes of FT, but also the challenges of transplanting hard and soft tissues to restore complex stomatognathic function. Further attention directed toward comprehensive oral rehabilitation in FT will contribute to improved outcomes, with the ultimate goal of restoring and optimizing patient quality of life. PMID:25420927

  6. Intraoral lipoma: a rare clinical entity

    PubMed Central

    Agarwal, Rashmi; Kumar, Vikas; Kaushal, Ambrish; Singh, Rajeev Kumar

    2013-01-01

    Lipoma is a painless soft tissue tumour of the mesenchymal origin, which is slow growing and well circumscribed. The occurrence of lipoma is rare in the oral cavity (1–4%); however, the frequency is much higher in the head and neck region. The tumour is mostly present in the buccal mucosa, lips, tongue, palate, buccal sulcus and floor of the mouth. Sometimes the tumour becomes large enough to cause difficulty in speech and mastication. Histologically, lipoma is composed of mature fat cells, surrounded by normal fat. We present two cases of intraoral lipoma in two female patients. PMID:23362064

  7. Does acute intraoral pain alter cutaneous sensibility?

    PubMed Central

    Hansson, P; Ekblom, A; Lindblom, U; Marchettini, P

    1988-01-01

    Cutaneous sensibility was tested in eight patients suffering from acute postoperative intraoral pain. Tactile-, cold-, warm-, and heat-pain thresholds as well as reaction time to cold pulses were unaffected by the presence of pain. However, reaction time to warm pulses was increased in the painful area on the day of pain compared to a non-painful state. The findings are discussed in relation to (1) functional convergence of different sensory fibres on central neurons (2) the phenomenon of diffuse noxious inhibitory controls and (3) secondary hyperalgesia. The observed effect of clinical pain on the warm pathway could be explained as an intrasegmental noxious inhibitory effect. PMID:3216205

  8. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  9. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  10. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  11. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  12. 21 CFR 872.5570 - Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep apnea.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... devices for snoring and obstructive sleep apnea. 872.5570 Section 872.5570 Food and Drugs FOOD AND DRUG... Devices § 872.5570 Intraoral devices for snoring and intraoral devices for snoring and obstructive sleep... obstructive sleep apnea are devices that are worn during sleep to reduce the incidence of snoring and to...

  13. Age estimation using intraoral periapical radiographs

    PubMed Central

    Rajpal, Pooja S.; Krishnamurthy, Vasavi; Pagare, Sandeep S.; Sachdev, Geeta D.

    2016-01-01

    Context: Changes in the size of dental pulp caused by the apposition of secondary dentin and occlusal wear are morphometric parameters for estimating age. Aim: To estimate the accuracy of age evaluation by Kvaal's method and the effect of occlusal wear on age using digital intraoral periapical radiographs in a subset of the Indian population. Materials and Methods: A total of 300 teeth were radiographically evaluated using intraoral periapical digital radiographs from 50 adult patients. A few modifications were made in the design of the study compared to the original Kvaal's method. The radiographs of three teeth from each jaw were taken and morphometric measurements in ratios were analyzed, which included the pulp length to tooth length (X1), pulp length to root length (X2), pulp width to root widths at three defined levels (X3), and tooth length to root length (X4). Statistical Analysis: The Pearson product-moment correlation coefficient (PCC) between age and the morphological variables showed that among them X1, X2, and X3 were statistically significant but not the tooth root length ratio (X4). Conclusions: The ratios X1, X2, and X3 were good indicators of age and hence a multiple linear regression model for age estimation was derived using these three variables. However, it was found that X4 was not a good indicator of age estimation in said population. PMID:27051226

  14. [The role of intraoral mucosal receptors in the completely edentulous in the discrimination of the layers].

    PubMed

    Orofino, J; Heraud, J E; Hartman, F; Mariani, P

    1989-06-15

    Studies on proprioceptive sensitivity in edentulous subjects let appear prevalent mucosal receptors compared to muscular or articular receptors. Neurophysiological mechanism seem identical in edentulous patients and statistical studies allowed us to highlight the functional characteristics of receptors in the intraoral mucosa; they replace the missing desmodontal receptors. The perception accuracy of extremely thin layers permits the practitioner to perfect his occlusal equilibration as well as to control his patient's occlusal vertical dimension with a new method of reference. The use of patient's sensitive information through their lemniscal systems should lead to a better integration of our dentures and avoid a physiopathology such as dysfunction of the temporomandibular joint. PMID:2630199

  15. Extraoral periapical radiography: an alternative approach to intraoral periapical radiography.

    PubMed

    Kumar, Rahul; Khambete, Neha; Priya, Ekta

    2011-12-01

    It is difficult to take intraoral radiographs in some patients who are intolerable to place the film in their mouth. For these patients, Newman and Friedman recommended a new technique of extraoral film placement. Here we report various cases that diagnostic imaging was performed in patients using the extraoral periapical technique. This technique was used to obtain the radiographs for the patients with severe gag reflex, pediatric dental patients, and patients with restricted mouth opening. This technique can be recommended as an alternative to conventional intraoral periapical technique in cases where intraoral film placement is difficult to achieve. PMID:22232725

  16. Guides for intraoral x-rays

    SciTech Connect

    Ogunsunlade, O.A.

    1988-03-15

    An h-shaped exterior guide for use in combination with a SNAP-A-RAY film holder for accurately aligning a beam from an X-ray cone with an X-ray film during the process of taking intraoral periapical dental X-rays of the maxillary and mandibular teeth is described comprising: a first guide arm laterally and detachably connectable through a housing means; a traverse arm extending from the midpoint of the first guide arm and parallel to the X-ray film; and a second guide arm extending perpendicularly from an end of the traverse arm toward a plane of the X-ray film and in parallel relation up to an end point of the first guide arm.

  17. Intraoral administration of botulinum toxin for trigeminal neuropathic pain.

    PubMed

    Herrero Babiloni, Alberto; Kapos, Flavia P; Nixdorf, Donald R

    2016-06-01

    This article presents 2 cases of different neuropathic trigeminal pain conditions treated with intraoral botulinum toxin injections. There is a growing body of evidence to support the use of this substance when administered subcutaneously in the treatment of neuropathic pain, such as in extraoral injections for trigeminal neuralgia. However, reports of intraoral submucosal administration are still lacking. In the 2 cases presented here, neuropathic pain was refractory to treatment with an important intraoral peripheral component, so onabotulinum toxin A was introduced as an adjuvant therapy. The technique, doses, and dilution are discussed. The patients reported significant reductions in pain frequency and intensity, with minimal side effects of temporary mucosal dryness and smile droopiness. The analgesic benefits of botulinum toxin may be utilized to address intraoral neuropathic pain. Further studies are needed to confirm safety and effectiveness in larger samples. PMID:27181448

  18. A histological study of non-ceramic hydroxyapatite as a bone graft substitute material in the vertical bone augmentation of the posterior mandible using an interpositional inlay technique: A split mouth evaluation.

    PubMed

    Bechara, Karen; Dottore, Alexandre M; Kawakami, Paulo Y; Gehrke, Sergio A; Coelho, Paulo G; Piattelli, Adriano; Iezzi, Giovanna; Shibli, Jamil Awad

    2015-11-01

    The aim of this study was to compare the influence of graft material (non-ceramic hydroxyapatite versus autologous bone) on bone behaviour and perform a resonance frequency analysis of implants placed in augmented sites to evaluate stability. For this study, 11 patients with bilateral edentulous areas in the mandibular posterior region were selected. Alveolar augmentation osteotomies were bilaterally (split mouth design) performed. In one hemiarch, the space generated by the osteotomy was grafted with an interpositional intra-oral autologous bone graft (control group). In the other hemiarch, the space generated by the osteotomy was grafted with an interpositional non-ceramic hydroxyapatite (ncHA) (test group). The groups were randomized. After 6 months of healing, a bone sample was retrieved from each side for histological evaluation using a trephine drill that was 2-mm in internal diameter. The implant stability quotient (ISQ) was measured by the resonance frequency immediately following implant placement at baseline and after 6 months of follow-up. Good incorporation of the graft was observed in both groups; however, in the test group, a residual-grafted material was observed. Bone density and marrow spaces were similar between groups. Correlations between the ISQ values and the histometric variables were not observed (p>0.05). The results of this trial suggest that both intra-oral autologous bone and ncHA may be elected as interpositional grafting materials to vertically augment posterior atrophic mandibles. PMID:26325427

  19. [A case with both infectious cavernous sinus thrombosis and Lemierre syndrome due to intraoral resident flora].

    PubMed

    Nishida, Akihiro; Ogata, Toshiyasu; Kudo, Masataka; Fukuhara, Kousuke; Fukae, Jiro; Tsuboi, Yoshio

    2015-01-01

    The present report describes a 54-year-old woman with cavernous sinus thrombosis (CST) presenting with fever, and marked periorbital swelling. There is a history of untreated periodontal disease. On initial examination, periorbital pain associated with bilateral blephaloptosis, chemosis, and disturbed eye movement was present. The laboratory evaluation showed significant elevations in inflammatory and fibrinolytic markers. Diffusion-weighted MRI revealed high signal intensities in the bilateral superior ophthalmic veins (SOV). Contrast-enhanced computed tomography (CT) of the cranium showed an enlarged right SOV and a non-enhancing lesion within the right SOV and bilateral cavernous sinus, indicating cavernous sinus thrombosis with diffuse SOV thrombosis. Blood culture performed on admission showed bacterial infection by intraoral resident flora; therefore, the CST was attributed to untreated periodontal disease. Contrast-enhanced CT of the case also revealed the presence of thrombosis in the jugular vein associated with micropulmonary embolus, indicating co-occurrence of Lemierre's syndrome. Antibiotic and anticoagulant treatment were initiated, and the tooth decay was treated; all clinical symptoms and signs subsequently improved. Additional neuroimaging showed that the thrombus was absent from both SOV and the cavernous sinus. Infectious CST is life threatening; therefore, laboratory and imaging examination should be performed quickly, and antibiotic and anticoagulant therapy administrated immediately. PMID:26041393

  20. A new non-endoscopic intraoral approach for open reduction and internal fixation of subcondylar fractures of the mandible.

    PubMed

    Hakim, Samer George; Trankle, Thomas; Kimmerle, Harald; Sieg, Peter; Jacobsen, Hans-Christian

    2014-10-01

    Open reduction and internal fixation (ORIF) of subcondylar fractures of the mandible is a widely accepted treatment concept aimed at reconstruction of the vertical height of the mandibular ramus and restoration of occlusion. Here, we describe new instruments designed for ORIF via an intraoral approach using a single inverted y-miniplate. The special design allows sufficient visualisation of the fracture site and enables the establishment of a standardised procedure for the treatment of both dislocated and non-dislocated fractures. Several manoeuvres are described and some clinical cases are presented. Challenges frequently met during ORIF of subcondylar fractures via the intraoral approach such as limited exposure and visual control of fracture site can be overcome using the instruments-kit presented, which help to optimise this treatment. PMID:24613104

  1. Dental MRI using wireless intraoral coils.

    PubMed

    Ludwig, Ute; Eisenbeiss, Anne-Katrin; Scheifele, Christian; Nelson, Katja; Bock, Michael; Hennig, Jürgen; von Elverfeldt, Dominik; Herdt, Olga; Flügge, Tabea; Hövener, Jan-Bernd

    2016-01-01

    Currently, the gold standard for dental imaging is projection radiography or cone-beam computed tomography (CBCT). These methods are fast and cost-efficient, but exhibit poor soft tissue contrast and expose the patient to ionizing radiation (X-rays). The need for an alternative imaging modality e.g. for soft tissue management has stimulated a rising interest in dental magnetic resonance imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray imaging, however, so far the spatial resolution of MRI is lower and the scan time is longer. In this contribution, we describe wireless, inductively-coupled intraoral coils whose local sensitivity enables high resolution MRI of dental soft tissue. In comparison to CBCT, a similar image quality with complementary contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250∙250∙500 μm(3) was achieved in 4 min only. Compared to dental MRI acquired with clinical equipment, the quality of the images was superior in the sensitive volume of the coils and is expected to improve the planning of interventions and monitoring thereafter. This method may enable a more accurate dental diagnosis and avoid unnecessary interventions, improving patient welfare and bringing MRI a step closer to becoming a radiation-free alternative for dental imaging. PMID:27021387

  2. Dental MRI using wireless intraoral coils

    PubMed Central

    Ludwig, Ute; Eisenbeiss, Anne-Katrin; Scheifele, Christian; Nelson, Katja; Bock, Michael; Hennig, Jürgen; von Elverfeldt, Dominik; Herdt, Olga; Flügge, Tabea; Hövener, Jan-Bernd

    2016-01-01

    Currently, the gold standard for dental imaging is projection radiography or cone-beam computed tomography (CBCT). These methods are fast and cost-efficient, but exhibit poor soft tissue contrast and expose the patient to ionizing radiation (X-rays). The need for an alternative imaging modality e.g. for soft tissue management has stimulated a rising interest in dental magnetic resonance imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray imaging, however, so far the spatial resolution of MRI is lower and the scan time is longer. In this contribution, we describe wireless, inductively-coupled intraoral coils whose local sensitivity enables high resolution MRI of dental soft tissue. In comparison to CBCT, a similar image quality with complementary contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250∙250∙500 μm3 was achieved in 4 min only. Compared to dental MRI acquired with clinical equipment, the quality of the images was superior in the sensitive volume of the coils and is expected to improve the planning of interventions and monitoring thereafter. This method may enable a more accurate dental diagnosis and avoid unnecessary interventions, improving patient welfare and bringing MRI a step closer to becoming a radiation-free alternative for dental imaging. PMID:27021387

  3. Dental MRI using wireless intraoral coils

    NASA Astrophysics Data System (ADS)

    Ludwig, Ute; Eisenbeiss, Anne-Katrin; Scheifele, Christian; Nelson, Katja; Bock, Michael; Hennig, Jürgen; von Elverfeldt, Dominik; Herdt, Olga; Flügge, Tabea; Hövener, Jan-Bernd

    2016-03-01

    Currently, the gold standard for dental imaging is projection radiography or cone-beam computed tomography (CBCT). These methods are fast and cost-efficient, but exhibit poor soft tissue contrast and expose the patient to ionizing radiation (X-rays). The need for an alternative imaging modality e.g. for soft tissue management has stimulated a rising interest in dental magnetic resonance imaging (MRI) which provides superior soft tissue contrast. Compared to X-ray imaging, however, so far the spatial resolution of MRI is lower and the scan time is longer. In this contribution, we describe wireless, inductively-coupled intraoral coils whose local sensitivity enables high resolution MRI of dental soft tissue. In comparison to CBCT, a similar image quality with complementary contrast was obtained ex vivo. In-vivo, a voxel size of the order of 250•250•500 μm3 was achieved in 4 min only. Compared to dental MRI acquired with clinical equipment, the quality of the images was superior in the sensitive volume of the coils and is expected to improve the planning of interventions and monitoring thereafter. This method may enable a more accurate dental diagnosis and avoid unnecessary interventions, improving patient welfare and bringing MRI a step closer to becoming a radiation-free alternative for dental imaging.

  4. Bilateral taurodontism in primary dentition with hypodontia.

    PubMed

    Surendar, Marappan Natarajan; Pandey, Ramesh Kumar; Khanna, Richa

    2013-01-01

    Taurodontism is a rare dental anomaly in which there is an enlarged pulp chamber at the expense of roots with apical displacement of the pulpal floor, giving it a rectangular shape. It is caused by the failure of Hertwig's epithelial root sheath to invaginate at the proper horizontal level. Taurodontism has been reported as an intraoral feature of several syndromes like Down syndrome, Klinefelter syndrome, Smith-Magenis syndrome, Hurler syndrome, etc. Association of taurodontism with hypodontia in permanent dentition has also been reported. Taurodontism in primary dentition and its association with hypodontia is very rarely reported in the literature. The present case illustrates bilateral taurodontism of primary mandibular molars with hypodontia in maxilla. PMID:23345504

  5. Dose measurements in intraoral radiography using thermoluminescent dosimeters

    NASA Astrophysics Data System (ADS)

    Azorín, C.; Azorín, J.; Aguirre, F.; Rivera, T.

    2015-01-01

    The use of X-ray in medicine demands to expose the patient and the professional to the lowest radiation doses available in agreement with ALARA philosophy. The reference level for intraoral dental radiography is 7 mGy and, in Mexico, a number of examinations of this type are performed annually. It is considered that approximately 25% of all the X-rays examinations carried out in our country correspond to intraoral radiographies. In other hand, most of the intraoral X-ray equipment correspond to conventional radiological systems using film, which are developed as much manual as automatically. In this work the results of determining the doses received by the patients in intraoral radiological examinations made with different radiological systems using LiF:Mg,Cu,P+PTFE thermoluminescent dosimeters are presented. In some conventional radiological systems using film, when films are developed manual or automatically, incident kerma up to 10.61 ± 0.74 mGv were determined. These values exceed that reference level suggested by the IAEA and in the Mexican standards for intraoral examinations.

  6. Intra-oral PTH Administration Promotes Tooth Extraction Socket Healing

    PubMed Central

    Kuroshima, S.; Kovacic, B.L.; Kozloff, K.M.; McCauley, L.K.; Yamashita, J.

    2013-01-01

    Intermittent parathyroid hormone (PTH) administration increases systemic and craniofacial bone mass. However, the effect of PTH therapy on healing of tooth extraction sites is unknown. The aims of this study were to determine the effect of PTH therapy on tooth extraction socket healing and to examine whether PTH intra-oral injection promotes healing. The mandibular first molars were extracted in rats, and subcutaneous PTH was administered intermittently for 7, 14, and 28 days. In a second study, maxillary second molars were extracted, and PTH was administered by either subcutaneous or intra-oral injection to determine the efficacy of intra-oral PTH administration. Healing was assessed by micro-computed tomography and histomorphometric analyses. PTH therapy accelerated the entire healing process and promoted both hard- and soft-tissue healing by increasing bone fill and connective tissue maturation. PTH therapy by intra-oral injection was as effective as subcutaneous injection in promoting tooth extraction socket healing. The findings suggest that PTH therapy promotes tooth extraction socket healing and that intra-oral injections can be used to administer PTH. PMID:23611925

  7. Minimally invasive intraoral condylectomy: proof of concept report.

    PubMed

    Hernández-Alfaro, F; Méndez-Manjón, I; Valls-Ontañón, A; Guijarro-Martínez, R

    2016-09-01

    A significant proportion of facial asymmetry cases are caused by abnormal growth of the mandibular condyles. Surgical management is generally based on a condylectomy performed through a pre-auricular transcutaneous access. However, this approach entails potential neurovascular, salivary, and aesthetic complications. In this study, a proof-of-concept evaluation was performed of a novel minimally invasive technique for condylectomy performed through an intraoral approach. Based on precise three-dimensional virtual planning to define intraoperative references, this technique provides an excellent access for total or partial condylectomy through a limited intraoral incision. Piezoelectric surgery with customized attachments enables the safe, accurate execution of the condylectomy. In addition, experience gained in seven consecutive cases suggests that the need for coronoidectomy can be obviated, surgical time is reduced to an average of 16.9min, and postoperative morbidity is minimal. This alternative intraoral approach could become the treatment of choice for most condylar hyperplastic conditions. PMID:27134047

  8. 21 CFR 872.1810 - Intraoral source x-ray system.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  9. 21 CFR 872.1810 - Intraoral source x-ray system.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  10. 21 CFR 872.1810 - Intraoral source x-ray system.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  11. 21 CFR 872.1810 - Intraoral source x-ray system.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  12. 21 CFR 872.1810 - Intraoral source x-ray system.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Intraoral source x-ray system. 872.1810 Section... (CONTINUED) MEDICAL DEVICES DENTAL DEVICES Diagnostic Devices § 872.1810 Intraoral source x-ray system. (a) Identification. An intraoral source x-ray system is an electrically powered device that produces x-rays and...

  13. Intraoral anastomosis of a prelaminated radial forearm flap in reconstruction of a large persistent cleft palate.

    PubMed

    Landes, Constantin; Cornea, Petruta; Teiler, Anna; Ballon, Alexander; Sader, Robert

    2014-03-01

    In this report, we present a case of a prelaminated radial forearm flap in reconstruction of a large persistent cleft palate with transoral single arterial and three venous anastomoses. A 17-years-old female patient presented a large cleft palate defect and complete dentition, dysmelia of both arms and bilateral thumb aplasia. A radial flap was prelaminated using oral mucosa 5 days prior to transplantation. Five days after flap prelamination, the facial artery and vein, submandibular vein, and a venous branch to the masseter muscle behind the buccinator muscle fibers were exposed through an intraoral incision lateral to the inferior right mucogingival junction. The radial artery, its bilateral accompanying veins, and the cephalic vein of transplanted flap were anastomosed transorally to the facial vessels, submandibular vein, and masseter branch. The vessel pedicle ran through the palatoglossal arch dorsal to the second upper molar. Good flow and flap perfusion were evinced, and further-on successful healing was achieved. The case encourages similar treatment in comparable situations avoiding facial nerve hazard and extraoral scars. PMID:24174205

  14. Understanding the Potential of Digital Intraoral and Benchtop Scanning Workflows.

    PubMed

    Jansen, Curtis E

    2015-01-01

    Although the overwhelming majority of dental offices now use digital radiography and patient records, relatively few yet use either stand-alone intraoral scanning systems (6%) or complete systems that combine intraoral scanning with computer-aided design and computer-aided manufacturing (12%). This should change as dentists become more aware of the numerous advantages scanning systems offer in terms of patient care and communication of patient information, particularly with the dental laboratory. This article reviews the various types of scanner architecture as well as potential workflow models. PMID:26625165

  15. 21 CFR 872.4600 - Intraoral ligature and wire lock.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...) Identification. An intraoral ligature and wire lock is a metal device intended to constrict fractured bone segments in the oral cavity. The bone segments are stabilized by wrapping the ligature (wire) around the fractured bone segments and locking the ends together. (b) Classification. Class II....

  16. 21 CFR 872.4600 - Intraoral ligature and wire lock.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...) Identification. An intraoral ligature and wire lock is a metal device intended to constrict fractured bone segments in the oral cavity. The bone segments are stabilized by wrapping the ligature (wire) around the fractured bone segments and locking the ends together. (b) Classification. Class II....

  17. Xeroradiography for intraoral dental radiology. A process description.

    PubMed

    Jeromin, L S; Geddes, G F; White, S C; Gratt, B M

    1980-02-01

    A novel x-ray imaging system for intraoral dental radiography is described. The imaging process is based on xeroradiographic principles. The surface of a small selenium photoreceptor is electrically charged. After insertion into a light-tight cassette, the photoreceptor is placed intraorally and x-ray exposed like film. The resultant electrostatic charge image is developed in a processor using liquid toner. The toner image is then transferred from the photoreceptor and fixed to a white plastic substrate for viewing. After cleaning, the photoreceptor is available for reuse. In contrast to film images, xeroradiographic images are exposed and processed sequentially. Processing time is approximately 20 seconds. Two image characteristics--edge enhancement and deletion--are primarily responsible for many advantageous qualities of xeroradiographic images over film images. An experimental processor was tested successfully at two dental schools. PMID:6928292

  18. Factors affecting intra-oral pH - a review.

    PubMed

    Loke, C; Lee, J; Sander, S; Mei, L; Farella, M

    2016-10-01

    One of the greatest challenges to modern dentistry is the progressive destruction of tooth material due to chemical erosion. Dental erosion is the loss of dental hard tissue, without the action of bacteria, in which demineralisation of enamel and dentine results due to a decrease in intra-oral pH. The aim of this review was to appraise the scientific literature on the factors that can affect intra-oral pH. The review will examine (i) the protective role of human saliva, in terms of its mineral composition, flow rates and buffering systems and (ii) sources of in-mouth acids such as extrinsic acids, which are derived from the diet and environment, as well as intrinsic acids, which are related to disorders of the gastro-oesophageal tract. This review may assist clinicians to identify the risk factors for tooth wear and to recommend adequate preventive measures to patients. PMID:27573678

  19. Intraoral tumor with rapid growing. Report of a case.

    PubMed

    González-Martín-Moro, Javier; Cebrián-Carretero, Jose Luis; Gómez-García, Elena; del Castillo-Pardo de Vera, Jose Luis; del Val, Daniel

    2005-01-01

    The appearance of an intraoral mass is common in our specialty. Most are benign lesions, but some are primary malignancies. Metastases account for less than 1% of all oral malignancies. An 86 year old woman was referred to our department with a large, asymptomatic, intraoral, fast-growing mass. She had no previous cancer history or other relevant physical findings. The radiology studies showed underlying bone erosion. The histological study showed a metastatic adenocarcinoma with a suspected origin in the abdomen. We were unable to identify it by non invasive diagnostic procedures. Given the patient's general status and despite the ominous prognosis of such lesions, we decided not to perform any aggressive therapy beyond removing the oral mass, in order to maintain her quality of life. There have been no local recurrences until this time. PMID:16264378

  20. Intraoral Burkitt's lymphoma in an HIV positive patient

    PubMed Central

    Ajila, Vidya; Gopakumar, R.; Hegde, Shruthi; Babu, Subhas G.

    2012-01-01

    Burkitt's lymphoma is an aggressive form of Non-Hodgkin's lymphoma composed of malignant cells of B lymphocyte origin. Burkitt's lymphoma is a rarity in the Indian subcontinent. Though intraoral Burkitt's lymphoma in HIV positive individuals is very uncommon, its importance lies in the fact that it is often the first sign of the underlying immunosuppression. We present a case of Burkitt's lymphoma in right maxillary region which was the first manifestation of HIV in the patient. PMID:23188938

  1. Intraoral Laser Welding (ILW) in Implant Prosthetic Dentistry: Case Report

    PubMed Central

    Fornaini, Carlo; Merigo, Elisabetta; Cernavin, Igor; Lòpez de Castro, Gonzalo; Vescovi, Paolo

    2012-01-01

    The aim of this clinical study was to describe the possibility of using the Nd:YAG laser device utilized in the dental offices to weld metals intraorally. The authors, before applying this technique “in vivo” on human subjects, tested the “in vitro” metal welding efficacy of dental Nd:YAG device firstly by interferometry, SEM, and EDS and subsequently by thermal camera and thermocouples in order to record temperature changes during the welding process on bovine jaws. Four implants were inserted in the edentulous maxillary arch of a 67 years old male patient. Immediately after that, a bar previously made by the dental technician was intraorally welded to the abutments by Nd:YAG laser (Fidelis Plus III, Fotona, Slovenia) with these parameters: 9.90 mJ, 1 Hz, 15 msec, 0.6 mm spot. Then the prosthesis was connected to the bar with four OT Caps. This clinical study, even if preliminary, suggests that laser welding technique may be intraorally used without side effects. PMID:22924134

  2. Intraoral Laser Welding (ILW) in Implant Prosthetic Dentistry: Case Report.

    PubMed

    Fornaini, Carlo; Merigo, Elisabetta; Cernavin, Igor; Lòpez de Castro, Gonzalo; Vescovi, Paolo

    2012-01-01

    The aim of this clinical study was to describe the possibility of using the Nd:YAG laser device utilized in the dental offices to weld metals intraorally. The authors, before applying this technique "in vivo" on human subjects, tested the "in vitro" metal welding efficacy of dental Nd:YAG device firstly by interferometry, SEM, and EDS and subsequently by thermal camera and thermocouples in order to record temperature changes during the welding process on bovine jaws. Four implants were inserted in the edentulous maxillary arch of a 67 years old male patient. Immediately after that, a bar previously made by the dental technician was intraorally welded to the abutments by Nd:YAG laser (Fidelis Plus III, Fotona, Slovenia) with these parameters: 9.90 mJ, 1 Hz, 15 msec, 0.6 mm spot. Then the prosthesis was connected to the bar with four OT Caps. This clinical study, even if preliminary, suggests that laser welding technique may be intraorally used without side effects. PMID:22924134

  3. Digital intraoral radiographic quality assurance and control in private practice.

    PubMed

    Walker, Timothy F; Mah, Peter; Dove, S Brent; McDavid, W Doss

    2014-01-01

    At present, the American Dental Association and the American Academy of Oral Maxillofacial Radiology have guidelines for the dental environment that include quality assurance and control of film-based radiography. Approximately 19%-30% of US dental offices currently use some form of digital intraoral radiography, and growth is expected to continue. It is anticipated that new tools and guidelines will be needed to aid in the development of quality assurance (QA) and control of digital intraoral radiographic images. Working with a representative sample of private practice dental offices, this study examined and evaluated the entire digital intraoral radiographic system used in each operatory. The X-ray machine was tested for equipment performance and accuracy, and the computer monitor calibration was evaluated and adjusted as needed. The results confirm the continued need for updated QA procedures in the dental office that include digital X-ray imaging. By implementing these changes and practices, dentists should be able to improve the diagnostic quality of radiographs while reducing the radiation exposure of the patient. PMID:25184710

  4. Electronic intraoral dental x-ray imaging system employing a direct-sensing CCD array

    NASA Astrophysics Data System (ADS)

    Cox, John D.; Langford, D. S.; Williams, Donald W.

    1993-12-01

    A commercial prototype intraoral radiography system has been developed that can provide digital x-ray images for diagnosis. The system consists of an intraoral detector head, an intermediate drive electronics package, a main drive electronics package, and a PC-based digital image management system. The system has the potential to replace the use of dental film in intraoral radiographic examinations. High-resolution images are acquired, then displayed on a CRT within seconds of image acquisition.

  5. Mandibular Movement Restoration in a Child with Bilateral Coronoid Hyperplasia: A Case Report

    PubMed Central

    Monevska, Danica Popovik; Benedetti, Alberto; Popovski, Vladimir; Naumovski, Slave; Grcev, Aleksandar; Bozovic, Suzana; Stamatoski, Aleksandar

    2016-01-01

    BACKGROUND: Coronoid process hyperplasia is an uncommon finding, characterized by an enlargement of the coronoid process, causing a mechanical obstacle by its interposing in the posterior portion of the maxilla or zygomatic arch. CASE PRESENTATION: The article presents a case report of a bilateral coronoid process hyperplasia in a 3-year-old girl demonstrated with inability to open the mouth and restricted jaw movement. Panoramic x-ray and 3-dimensional computed tomographic reconstruction showed bilateral elongation of the coronoid processes associated with deformation of the mandibular condyle with no involvement of the articular space. A coronoid resection by intraoral approach was done, followed by an aggressive physiotherapy. A considerable improvement in mouth opening of 30 mm was achieved. We strongly suggest early surgical treatment of coronoid hyperplasia to recover morphology and function consequently to reduce skeletofacial deformities in young patients. CONCLUSIONS: The article presents a clinical and surgical case of bilateral coronoidectomy in a 3-year-old girl, with retrognathic mandible. The diagnosis of bilateral coronoid process hyperplasia was confirmed, and the surgical treatment was under general anesthesia, with nasotracheal intubation guided by a nasofiber endoscope, using an intraoral approach. PMID:27335604

  6. Use of intraoral miniplates to control postoperative occlusion after high condylectomy for the treatment of condylar hyperplasia.

    PubMed

    Chepla, Kyle J; Cachecho, Cyrine; Hans, Mark G; Gosain, Arun K

    2012-03-01

    Mandibular condylar hyperplasia is a rare disorder, characterized by unilateral mandibular overgrowth with overeruption of the dentition on the affected side. Although the etiology is unclear, multiple surgical techniques have been described to correct the associated mandibular bone, occlusal, and soft tissue deformities. Often a condylectomy, to arrest mandibular growth, is combined with various orthognathic procedures to restore occlusion and facial harmony. Here we report our technique of isolated high condylectomy with simultaneous intraoral placement of maxillary and mandibular miniplates. Each plate has an intraoral extension that allows our orthodontists to develop vertical force vectors to intrude the maxillary and mandibular molar segments. Using this combined surgical and orthodontic technique, we were able to postoperatively control the occlusal cant, restore the dental midline, improve facial aesthetics, and resolve the patient's contralateral temporomandibular joint dysfunction without concomitant orthognathic surgery. As a result of our findings, we are currently using, and would recommend, this technique for patients requiring surgical-orthodontic intervention for other conditions. PMID:22421836

  7. Establishment of diagnostic reference levels for dental intraoral radiography.

    PubMed

    Manousaridis, G; Koukorava, C; Hourdakis, C J; Kamenopoulou, V; Yakoumakis, E; Tsiklakis, K

    2013-10-01

    Diagnostic reference levels (DRLs) is a tool for the optimisation of radiological procedures. Establishment of a DRL is a requirement of national regulations. Measurements performed by the Greek Atomic Energy Commission on 529 dental intraoral radiographic facilities have been used in order to define DRLs for digital and film imaging modalities, taking into account the region of the mouth to be imaged. Thus, different DRL values have been proposed for minimum (usually incisors), maximum (usually maxillary molars) and average exposure settings, both for film and digital imaging. The results have been compared with similar studies performed in Europe and the USA and are in line with the most recent ones. PMID:23615358

  8. Combination lower lip prosthesis retained by an intraoral component.

    PubMed

    Zeno, Helios A; Sternberger, Sidney S; Tuminelli, Frank J; Billotte, Michael; Kurtz, Kenneth S

    2013-07-01

    Patients who have had a partial or full surgical resection of the maxillary or mandibular lip experience difficulties with articulation of speech, swallowing, and salivary control. This is further complicated by significant alterations in facial esthetics and lowered self-esteem. This clinical treatment will describe the fabrication of a two-piece tooth-retained maxillofacial prosthesis. An intraoral retentive portion and an extraoral section restoring lip anatomy were attached by retentive elements. This prosthesis restored the patient's esthetics, oral function, and self-esteem. PMID:23387560

  9. Intraoral Morgellons disease or delusional parasitosis: a first case report.

    PubMed

    Dovigi, Allan J

    2010-08-01

    Morgellons disease is a new emerging disease that is still controversial and believed to be, by some practitioners, as nothing more than delusional parasitosis. The Center for Disease Control has recently launched an epidemiological investigation into this disease due to the increased number of reports. A first case is reported of an oral lesion and symptoms consistent with Morgellons disease. The nature of the characteristic fibers associated with the intraoral lesion is investigated. Research has started at a number of institutions to elucidate the nature of this emerging disease. PMID:20489569

  10. Cinnamon spice and everything not nice: many features of intraoral allergy to cinnamic aldehyde.

    PubMed

    Isaac-Renton, Megan; Li, Monica Kayi; Parsons, Laurie M

    2015-01-01

    Intraoral allergic contact dermatitis (ACD) is an uncommonly reported entity. The most commonly implicated allergens are metals that are incorporated into dental appliances. Intraoral ACD to nonmetal allergens is even less frequently described. Cinnamic aldehyde is widely used as a flavoring agent in foods and dentifrices. However, intraoral ACD to cinnamon flavoring agents has only been sporadically reported. In these cases, a variety of sources have been implicated, including candy, chewing gum, mouthwash, lip sunscreen, cinnamon toast, volatile oils, and toothpaste. The clinical presentation of intraoral ACD reactions varies greatly, and as a result, clinicians often do not recognize the diagnosis. Furthermore, because patients are typically unable to provide a list of putative allergens, a high degree of clinical suspicion is required to make the correct diagnosis. We describe several patients with intraoral ACD caused by cinnamon and review the literature associated with this condition. PMID:25984687

  11. [Bilateral operculum syndrome].

    PubMed

    Lerman-Sagie, T; Porat-Alkabetz, E; Meir, J J; Harel, S

    1996-09-01

    The bilateral operculum syndrome, is a unique developmental syndrome. It is characterized by spastic paralysis of the muscles of the face, pharynx, and of mastication, as well as by epilepsy and mental retardation. Imaging studies show bilateral, structural abnormalities in the frontal, perisylvian region consistent with polymicrogyria. These children are usually diagnosed as suffering from cerebral palsy, but in the bilateral operculum syndrome, intelligence is relatively preserved despite the severe motor involvement. Misdiagnosis may lead to improper estimation of rehabilitation potential preventing appropriate therapy, especially in the field of alternative communication. We present a 3-year-old boy, apparently the first case of this syndrome to be described in Israel. PMID:8940497

  12. A method of multi-view intraoral 3D measurement

    NASA Astrophysics Data System (ADS)

    Zhao, Huijie; Wang, Zhen; Jiang, Hongzhi; Xu, Yang; Lv, Peijun; Sun, Yunchun

    2015-02-01

    In dental restoration, its important to achieve a high-accuracy digital impression. Most of the existing intraoral measurement systems can only measure the tooth from a single view. Therfore - if we are wilng to acquire the whole data of a tooth, the scans of the tooth from multi-direction ad the data stitching based on the features of the surface are needed, which increases the measurement duration and influence the measurement accuracy. In this paper, we introduce a fringe-projection based on multi-view intraoral measurement system. It can acquire 3D data of the occlusal surface, the buccal surface and the lingual surface of a tooth synchronously, by using a senor with three mirrors, which aim at the three surfaces respectively and thus expand the measuring area. The constant relationship of the three mirrors is calibrated before measurement and can help stitch the data clouds acquired through different mirrors accurately. Therefore the system can obtain the 3D data of a tooth without the need to measure it from different directions for many times. Experiments proved the availability and reliability of this miniaturized measurement system.

  13. [Bilateral segmental neurofibromatosis].

    PubMed

    Rose, I; Vakilzadeh, F

    1991-12-01

    Segmental neurofibromatosis is a rare type of neurofibromatosis. We report a case of bilateral manifestation, review the literature on this extremely uncommon variant, and discuss the possible causative mechanisms and the genetic risk of segmental neurofibromatosis. PMID:1765491

  14. [Mandibular advancement: bilateral sagittal split versus -distraction osteogenesis].

    PubMed

    Akkerman, V; Ho, J P; Baas, E M; de Lange, J de

    2015-11-01

    In the 1990s intra-oral distraction osteogenesis (DO) became available as an alternative for bilateral sagittal splitosteotomy (BSSO) for advancement of the mandible. It was thought that DO would lead to more stability in the results and fewer neurosensory disturbances of the inferior alveolar nerve. However, there was no scientific evidence for this assumption. This article describes a number of recently published, prospective studies that demonstrate that BSSO is not inferior to DO with respect to stability and neurosensory disturbances of the inferior alveolar nerve. They also demonstrate that BSSO leads to less pain in patients and to lower total costs. It can be concluded that BSSO should be considered the standard therapy for mandibular advancement up to 10 mm in non-syndromal patients. PMID:26569001

  15. The use of low-level laser therapy for controlling the gag reflex in children during intraoral radiography.

    PubMed

    Elbay, Mesut; Tak, Önjen; Şermet Elbay, Ülkü; Kaya, Can; Eryılmaz, Kubilay

    2016-02-01

    The current literature suggests that low-level laser stimulation of the PC 6 acupuncture points may prevent gagging. This study aimed to determine if low-level laser therapy (LLLT) can reduce the gag reflex in children undergoing intraoral maxillary radiography. This randomized, controlled, double-blind clinical trial was conducted with 25 children with moderate-to-very severe gag reflexes who required bilateral periapical radiographic examination of the maxillary molar region. Children's anxiety levels were initially evaluated using Corah's Dental Anxiety Scale (DAS) to identify any possible relationship between gagging and anxiety. A control radiograph was taken of one randomly selected side in each patient after simulated laser application so that the patient was blinded to the experimental conditions (control group). Laser stimulation was then performed for the experimental side. A laser probe was placed on the Pericardium 6 (PC 6) acupuncture point on each wrist, and laser energy was delivered for 14 s (300 mW, energy density 4 J/cm(2)) at a distance of 1 cm from the target tissue. Following laser stimulation, the experimental radiograph was taken (experimental group). Gagging responses were measured using the Gagging Severity Criteria for each group. Data were analyzed using Spearman's rho correlations and Mann-Whitney U tests. Both mean and median gagging scores were higher in the control group than in the experimental group. Patients who were unable to tolerate the intraoral control radiography were able to tolerate the procedure after LLLT. Differences between gagging scores of the control and experimental groups were statistically significant (P = .000). There was no significant correlation between gagging severity and anxiety score (P > .05). A negative correlation was found between age and gagging score in the control group (P ˂ .05). Within the limitations of this study, LLLT of the PC 6 acupuncture points appears to be a useful technique

  16. Echinoderms Have Bilateral Tendencies

    PubMed Central

    Zhao, Wenchan; Wang, Sishuo; Lv, Jianhao

    2012-01-01

    Echinoderms take many forms of symmetry. Pentameral symmetry is the major form and the other forms are derived from it. However, the ancestors of echinoderms, which originated from Cambrian period, were believed to be bilaterians. Echinoderm larvae are bilateral during their early development. During embryonic development of starfish and sea urchins, the position and the developmental sequence of each arm are fixed, implying an auxological anterior/posterior axis. Starfish also possess the Hox gene cluster, which controls symmetrical development. Overall, echinoderms are thought to have a bilateral developmental mechanism and process. In this article, we focused on adult starfish behaviors to corroborate its bilateral tendency. We weighed their central disk and each arm to measure the position of the center of gravity. We then studied their turning-over behavior, crawling behavior and fleeing behavior statistically to obtain the center of frequency of each behavior. By joining the center of gravity and each center of frequency, we obtained three behavioral symmetric planes. These behavioral bilateral tendencies might be related to the A/P axis during the embryonic development of the starfish. It is very likely that the adult starfish is, to some extent, bilaterian because it displays some bilateral propensity and has a definite behavioral symmetric plane. The remainder of bilateral symmetry may have benefited echinoderms during their evolution from the Cambrian period to the present. PMID:22247765

  17. Baleen wear reveals intraoral water flow patterns of mysticete filter feeding.

    PubMed

    Werth, Alexander J; Straley, Janice M; Shadwick, Robert E

    2016-04-01

    A survey of macroscopic and microscopic wear patterns in the baleen of eight whale species (Cetacea: Mysticeti) discloses structural, functional, and life history properties of this neomorphic keratinous tissue, including evidence of intraoral water flow patterns involved in filter feeding. All baleen demonstrates wear, particularly on its medial and ventral edges, as flat outer layers of cortical keratin erode to reveal horn tubes, also of keratin, which emerge as hair-like fringes. This study quantified five additional categories of specific wear: pitting of plates, scratching of plates, scuffing of fringes, shortening of fringes, and reorientation of fringes (including fringes directed between plates to the exterior of the mouth). Blue whale baleen showed the most pitting and sei whale baleen the most scratching; gray whale baleen had the most fringe wear. The location of worn baleen within the mouth suggests that direct contact with the tongue is not responsible for most wear, and that flowing water as well as abrasive prey or sediment carried by the flowing water likely causes pitting and scratching of plates as well as fringe fraying, scuffing, shortening, and reorientation. Baleen also has elevated vertical and horizontal ridges that are unrelated to wear; these are probably related to growth and may allow for age determination. PMID:26825852

  18. A clinical comparative study of Cadiax Compact II and intraoral records using wax and addition silicone.

    PubMed

    Torabi, Kianoosh; Pour, Sasan Rasaei; Ahangari, Ahmad Hassan; Ghodsi, Safoura

    2014-01-01

    Evaluation of mandibular movements is necessary to form the occlusal anatomical contour, analyze the temporomandibular joint status, and evaluate the patient's occlusion. This clinical study was conducted to compare the mandibular recording device Cadiax Compact II with routine intraoral records for measuring condylar inclinations. The results showed that the differences between Cadiax and intraoral records were statistically significant for all measurements. Cadiax measurements had a stronger correlation with silicone records. The quantities of recorded Bennett angles were lower and the values of sagittal condylar inclination were higher with Cadiax than with routine intraoral records. PMID:25390868

  19. Bilateral popliteal arterial dissection.

    PubMed

    Chen, Po-Liang; Ko, Shih-Yu; Tan, Ken-Hing

    2012-01-01

    A clinical feature of bilateral popliteal arterial dissection without involving the descending aorta, bilateral iliac, as well as femoral arteries has never been reported in the past literature. We report a 56-year-old man with hypertension and coronary artery disease who presented to our emergency department with complaints of bilateral knee pain after long-distance walking. Physical examination was notable for elevated blood pressure, but there was no palpable pulsation over dorsalis pedis arteries on his feet. Laboratory evaluation revealed a d-dimer level of 35.2 mg/L (FEU) on the day of the test and 1.2 mg/L one and a half months ago (normal level, <0.55). These findings were suggestive of a recent-onset peripheral arterial occlusive disorder. Computed tomography of the aorta showed bilateral popliteal arterial dissection with arterial intimal flap. Abdominal aorta, bilateral iliac, and femoral arteries remained intact with only arteriosclerotic change. Minimally invasive endovascular stent grafting was then performed. The patient had an uneventful recovery. PMID:21106320

  20. [Bilateral caudate head infarcts].

    PubMed

    Kuriyama, N; Yamamoto, Y; Akiguchi, I; Oiwa, K; Nakajima, K

    1997-11-01

    We reported a 67-year-old woman with bilateral caudate head infarcts. She developed sudden mutism followed by abulia. She was admitted to our hospital 2 months after ictus for further examination. She showed prominent abulia and was inactive, slow and apathetic. Spontaneous activity and speech, immediate response to queries, spontaneous word recall and attention and persistence to complex programs were disturbed. Apparent motor disturbance, gait disturbance, motor aphasia, apraxia and remote memory disturbance were not identified. She seemed to be depressed but not sad. Brain CT and MRI revealed bilateral caudate head hemorrhagic infarcts including bilateral anterior internal capsules, in which the left lesion was more extensive than right one and involved the part of the left putamen. These infarct locations were thought to be supplied by the area around the medial striate artery including Heubner's arteries and the A1 perforator. Digital subtraction angiography showed asymptomatic right internal carotid artery occlusion. She bad had hypertension, diabetes mellitus and atrial fibrillation and also had a left atrium with a large diameter. The infarcts were thought to be caused by cardioembolic occlusion to the distal portion of the left internal carotid artery. Although some variations of vasculature at the anterior communicating artery might contribute to bilateral medial striate artery infarcts, we could not demonstrate such abnormalities by angiography. Bilateral caudate head infarcts involving the anterior internal capsule may cause prominent abulia. The patient did not improve by drug and rehabilitation therapy and died suddenly a year after discharge. PMID:9503974

  1. Intraoral Spitz nevus: case report and literature review.

    PubMed

    Li, Chia-Cheng; Harrist, Terence J; Noonan, Vikki L; Woo, Sook-Bin

    2014-04-01

    Spitz nevi account for approximately 1% of all melanocytic nevi of the skin in children. Although Spitz nevi often develop in the skin of the head and neck, intraoral Spitz nevi are rare. These nevi contain epithelioid and spindle cells and exhibit cytologic and architectural atypia when compared with routine melanocytic nevi, and may be mistaken for atypical Spitz tumor, Spitzoid melanoma, or conventional melanoma. Here, we report a Spitz nevus on the buccal mucosa of an 11-year-old boy. The tumor was composed of a proliferation of mostly epithelioid melanocytes with a smaller spindle cell component. The melanocytes were positive for S100, MART-1, and p16 proteins, with HMB-45-positive cells located only in the basal cell layer and superficial lamina propria. Less than 5% of the nuclei were positive for MIB-1, and there were no mitotic figures. We review the literature on 7 previously reported cases of Spitz nevi. PMID:24139994

  2. Chronic intraoral pain--assessment of diagnostic methods and prognosis.

    PubMed

    Pigg, Maria

    2011-01-01

    The overall goal of this thesis was to broaden our knowledge of chronic intraoral pain. The research questions were: What methods can be used to differentiate inflammatory, odontogenic tooth pain from pain that presents as toothache but is non-odontogenic in origin? What is the prognosis of chronic tooth pain of non-odontogenic origin, and which factors affect the prognosis? Atypical odontalgia (AO) is a relatively rare but severe and chronic pain condition affecting the dentoalveolar region. Recent research indicates that the origin is peripheral nerve damage: neuropathic pain. The condition presents as tooth pain and is challenging to dentists because it is difficult to distinguish from ordinary toothache due to inflammation or infection. AO is of interest to the pain community because it shares many characteristics with other chronic pain conditions, and pain perpetuation mechanisms are likely to be similar. An AO diagnosis is made after a comprehensive examination and assessment of patients' self-reported characteristics: the pain history. Traditional dental diagnostic methods do not appear to suffice, since many patients report repeated care-seeking and numerous treatment efforts with little or no pain relief. Developing methods that are useful in the clinical setting is a prerequisite for a correct diagnosis and adequate treatment decisions. Quantitative sensory testing (QST) is used to assess sensory function on skin when nerve damage or disease is suspected. A variety of stimuli has been used to examine the perception of, for example, touch, temperature (painful and non-painful), vibration, pinprick pain, and pressure pain. To detect sensory abnormalities and nerve damage in the oral cavity, the same methods may be possible to use. Study I examined properties of thermal thresholds in and around the mouth in 30 pain-free subjects: the influence of measurement location and stimulation area size on threshold levels, and time variability of thresholds

  3. Real-time structured light intraoral 3D measurement pipeline

    NASA Astrophysics Data System (ADS)

    Gheorghe, Radu; Tchouprakov, Andrei; Sokolov, Roman

    2013-02-01

    Computer aided design and manufacturing (CAD/CAM) is increasingly becoming a standard feature and service provided to patients in dentist offices and denture manufacturing laboratories. Although the quality of the tools and data has slowly improved in the last years, due to various surface measurement challenges, practical, accurate, invivo, real-time 3D high quality data acquisition and processing still needs improving. Advances in GPU computational power have allowed for achieving near real-time 3D intraoral in-vivo scanning of patient's teeth. We explore in this paper, from a real-time perspective, a hardware-software-GPU solution that addresses all the requirements mentioned before. Moreover we exemplify and quantify the hard and soft deadlines required by such a system and illustrate how they are supported in our implementation.

  4. Removal of an extensive mandibular odontoma using an intraoral approach.

    PubMed

    Lehman, Hadas; Lustmann, Joshua; Regev, Eran

    2013-01-01

    Odontomas, the most common odontogenic tumors, occur more frequently in the maxilla and are rarely larger than a tooth. They are usually found incidentally on routine dental radiographs during the second decade of life. The treatment of choice is surgical removal, and large tumors are challenging as damage may occur to surrounding anatomic structures. In this article we describe a "giant" compound odontoma occupying the entire body of the mandible and ramus in a 7-year-old girl. A conservative intraoral enucleation was used to avoid facial scarring and preserve mandibular continuity and function. The huge bony defect healed completely without a bone graft or further intervention. This case report emphasizes the importance of the early diagnosis of these lesions and a conservative surgical approach as well as the extraordinary healing potential of young patients. PMID:23479585

  5. Accidental intraoral injection of formalin during extraction: case report.

    PubMed

    Swami, Pushp Chander; Raval, Rushik; Kaur, Mandeep; Kaur, Jasleen

    2016-04-01

    Transparent, clear solutions such as hydrogen peroxide, alcohol, sodium hypochlorite, formaldehyde, and local anaesthetics are widely used in dentistry, so the tissues are liable to accidental injury. Formalin, a 37%-40% solution of formaldehyde, is extensively used in 10% solution as a tissue preservative, but it has toxic effects on systems such as the gastrointestinal tract, respiratory tract, skin, and mucosa. However, we know of few reports of cases of inadvertent injection of alcohol and formalin directly into the human body. In this case report we describe the early and delayed clinical effects of accidental intraoral injection of formalin, the subsequent symptoms and management, and some prudent points that should be learnt to avoid such incidents in the future. PMID:26794082

  6. Intraoral Approach for Treatment of Displaced Condylar Fractures: Case Report

    PubMed Central

    Pereira-Filho, Valfrido; Welsh, Bärbel; Schübel, Florian; Landes, Constantin; Sader, Robert; Gabrielli, Mario; Monnazzi, Marcelo

    2011-01-01

    Dislocated subcondylar fractures often require open reduction and internal fixation. This treatment modality results in better anatomy, early function, and facilitated physical therapy. Ideal stable fixation is obtained by use of two miniplates to control the tension zone in the sigmoid notch area and stabilize the posterior border region or, if there is not enough space, one stronger plate. That is most frequently achieved through extraoral approaches. Recently new instruments have facilitated the use of an intraoral approach, which is used usually with the aid of an endoscope. However, it is possible to perform the procedure without the endoscope if proper instruments and clinical mirrors for checking the posterior border reduction and fixation are used. A case of reduction and fixation of a medially dislocated condylar fracture is presented and discussed. PMID:22655121

  7. Bilateral inferior turbinate osteoma.

    PubMed

    Sahemey, R; Warfield, A T; Ahmed, S

    2016-01-01

    Osteomas are the most common benign osteoclastic tumours of the paranasal sinuses. However, nasal cavity and turbinate osteomas are extremely rare. Only nine middle turbinate, three inferior turbinate and one inferior turbinate osteoma cases have been reported to date. The present case report describes the management and follow-up of symptomatic bilateral inferior turbinate osteoma.A 60-year-old female presented with symptoms of bilateral nasal obstruction and right-sided epiphora. Radiological investigation found hypertrophic bony changes involving both inferior turbinates. The patient was managed successfully by endoscopic inferior turbinectomies in order to achieve a patent airway, with no further recurrence of tumour after 3 months postoperatively.To the best of our knowledge, this is the first reported case of bilateral inferior turbinate osteoma. We describe a safe and minimally invasive method of tumour resection, which has a better cosmetic outcome compared with other approaches. PMID:27534890

  8. Efficacy of bilateral pallidotomy.

    PubMed

    Kim, R; Alterman, R; Kelly, P J; Fazzini, E; Eidelberg, D; Beric, A; Sterio, D

    1997-03-15

    Unilateral pallidotomy is a safe and effective treatment for medically refractory bradykinetic Parkinson's disease, especially in those patients with levodopa-induced dyskinesia and severe on-off fluctuations. The efficacy of bilateral pallidotomy is less certain. The authors completed 11 of 12 attempted bilateral pallidotomies among 150 patients undergoing pallidotomy at New York University. In all but one patient, the pallidotomies were separated by at least 9 months. Patients were selected for bilateral pallidotomy if they exhibited bilateral rigidity, bradykinesia, or levodopa-induced dyskinesia prior to treatment or if they exhibited disease progression contralateral to their previously treated side. The Unified Parkinson's Disease Rating Scale (UPDRS) and timed upper-extremity tasks of the Core Assessment Protocol for Intracerebral Transplantation (CAPIT) were administered to all 12 patients in the "off" state (12 hours without receiving medications) preoperatively and again at 6 and 12 months after each procedure. The median UPDRS and contralateral CAPIT scores improved 60% following the initial procedure (p = 0.008, Wilcoxon rank sums test). The second pallidotomy generated only an additional 10% improvement in the UPDRS and CAPIT scores ipsilateral to the original procedure (p = 0.05). Worsened speech was observed in two cases. In the 12th case, total speech arrest was noted during test stimulation. Speech returned within minutes after stimulation was halted. Lesioning was not performed. These results indicate that bilateral pallidotomy has a narrow therapeutic window. Motor improvement ipsilateral to the first lesion leaves little room for further improvement from the second lesion and the risk of speech deficit is greatly enhanced. Chronic pallidal stimulation contralateral to a previously successful pallidotomy may prove to be a safer alternative for the subset of patients who require bilateral procedures. PMID:15096015

  9. Bilateral ovarian Burkitt's lymphoma.

    PubMed

    Gutiérrez-García, L; Medina Ramos, N; García Rodríguez, R; Barber, M A; Arias, M D; García, J A

    2009-01-01

    Primary ovarian lymphoma is a rare entity. We submit a case of a 34-year-old black patient presenting with a bilateral adnexal tumor. She underwent hysterectomy with double salpingo-oophorectomy followed by polychemotherapy treatment. Histology confirmed Epstein-Barr virus-positive bilateral Burkitt's lymphoma. The patient died from septic shock after a month of treatment. Endemic Burkitt's lymphoma has a predilection for the female genital tract, manifesting itself clinically as a pelvic mass and less frequently as a menstrual disorder. It is a rare entity in our environment but should be kept in mind when treating patients of African origin. PMID:19480266

  10. Recent advances in dental optics - Part I: 3D intraoral scanners for restorative dentistry

    NASA Astrophysics Data System (ADS)

    Logozzo, Silvia; Zanetti, Elisabetta M.; Franceschini, Giordano; Kilpelä, Ari; Mäkynen, Anssi

    2014-03-01

    Intra-oral scanning technology is a very fast-growing field in dentistry since it responds to the need of an accurate three-dimensional mapping of the mouth, as required in a large number of procedures such as restorative dentistry and orthodontics. Nowadays, more than 10 intra-oral scanning devices for restorative dentistry have been developed all over the world even if only some of those devices are currently available on the market. All the existing intraoral scanners try to face with problems and disadvantages of traditional impression fabrication process and are based on different non-contact optical technologies and principles. The aim of this publication is to provide an extensive review of existing intraoral scanners for restorative dentistry evaluating their working principles, features and performances.

  11. Bilateral pisotriquetral loose bodies

    PubMed Central

    Williams, GR; Holland, P; Beazley, J; Hyder, N

    2012-01-01

    Case reports detailing diagnosis and effective treatment of pisotriquetral loose bodies are scarce. This article describes an even rarer case of bilateral pisotriquetral joint loose bodies, explores the relative diagnostic roles of magnetic resonance imaging versus computed tomography, and outlines effective strategies used for the management of this condition drawn from the literature and our own experience. PMID:22507708

  12. Bilateral periorbital ecthyma gangrenosum.

    PubMed

    Ghosheh, Faris R; Kathuria, Sajeev S

    2006-01-01

    We describe a case of bilateral periorbital ecthyma gangrenosum in a diabetic patient with renal failure. Ecthyma gangrenosum is a cutaneous manifestation of Pseudomonas sepsis. We briefly review the pathogenesis of ecthyma gangrenosum and discuss previous reports of periocular involvement. In our patient, conservative measures and supportive care of the periorbital tissue resulted in a good outcome. PMID:17117116

  13. Early Orthopedic Retraction of the Premaxilla in Bilateral Complete Cleft Lip and Palate: An Innovative Approach to a Difficult Problem.

    PubMed

    Mahmood, Rizwan; Flood, Tim; Robinson, Stephen; Al-Gholmy, Mohammed

    2016-05-01

    Bilateral cleft lip and palate occurs in 9.2% of cleft patients. Many approaches have been adopted to manage the protrusive premaxillary segment in patients with bilateral cleft lip and palate. Some advocate the use of intraoral appliances, occasionally combined with invasive surgery, which often requires revision at a later date. The authors describe the case of a 3-year-old child born with bilateral cleft lip and palate presenting with a protuberant premaxilla and an overjet greater than 25 mm. Prompt intervention was warranted in this case due to the potential for traumatic compromise to the dentition of the premaxillary segment and a distinct lack of social integration reported by the parents. The patient was managed with a novel, innovative approach using orthodontic traction and minimally invasive surgery. The literature has been reviewed and the patient's subsequent physiological and psychosocial development has been monitored. He has since undergone successful alveolar bone grafting. PMID:25647517

  14. Bilateral renal calculi

    PubMed Central

    Sreenevasan, G

    1974-01-01

    Bilateral renal calculi were present in 114 (10.7%) of 1,070 cases of proved urinary calculus admitted to the Urological Department of the General Hospital, Kuala Lumpur, during the period November 1968—May 1973. The management of bilateral renal calculi is discussed with reference to the first 100 cases in this series. The introduction of renography has greatly facilitated the decision as to which kidney should be operated on first. The management of patients with and without uraemia is discussed and the use of the modified V and V—Y incisions for the removal of staghorn calculi is described. Complications and results are briefly reviewed. ImagesFig. 1Fig. 4Fig. 6Fig. 7 PMID:4845653

  15. Bilateral Sagittal Split Osteotomy

    PubMed Central

    Monson, Laura A.

    2013-01-01

    The bilateral sagittal split osteotomy is an indispensable tool in the correction of dentofacial abnormalities. The technique has been in practice since the late 1800s, but did not reach widespread acceptance and use until several modifications were described in the 1960s and 1970s. Those modifications came from a desire to make the procedure safer, more reliable, and more predictable with less relapse. Those goals continue to stimulate innovation in the field today and have helped the procedure evolve to be a very dependable, consistent method of correction of many types of malocclusion. The operative surgeon should be well versed in the history, anatomy, technical aspects, and complications of the bilateral sagittal split osteotomy to fully understand the procedure and to counsel the patient. PMID:24872760

  16. Bilateral Presumed Tuberculous Choroiditis

    PubMed Central

    Mohammadi, Naseh; Ghassemi, Fariba; Shojaei, Esfandiar; Moradnejad, Pardis

    2016-01-01

    Purpose: To describe a case of bilateral presumed tuberculous choroiditis which resolved promptly with a short course of antituberculous therapy. Case Report: A 44-year-old lady presented with bilateral visual loss of 8 months’duration. Considering the presence of pan-uveitis, severe macular edema, multifocal leakage on fluorescein angiography, positive tuberculin skin test, and after excluding other diseases, she underwent anti-tuberculous therapy (ATT) for disseminated choroiditis due to presumed ocular tuberculosis. She improved promptly and completely. There were no signs of relapse 18 months after completion of the treatment course. In a young patient with disseminated choroiditis and relatively short duration of symptoms, a course of ATT for 6 months may effectively treat the disease preventing relapse for a considerable period of time. Conclusion: In Presumed Tuberculous chroiditis early diagnosis is crucial for prompt and complete improvement. PMID:27413507

  17. Bilateral Mandibular Paramolars

    PubMed Central

    Dhull, Rachita Singh; Panda, Swagatika; Acharya, Sonu; Yadav, Shweta; Mohanty, Gatha

    2014-01-01

    ABSTRACT Supernumerary tooth is a developmental anomaly and has been argued to arise from multiple etiologies. These teeth may remain embedded in the alveolar bone or can erupt into the oral cavity. They can cause a variety of complications in the develo­ping dentition. Supernumerary teeth can present in various forms and in any region of the mandible or maxilla, but have a predisposition for the anterior maxilla. Here is the presentation of a case of unusual location of supernumerary teeth located in between mandibular first and second molar region bilaterally. How to cite this article: Dhull KS, Dhull RS, Panda S, Acharya S, Yadav S, Mohanty G. Bilateral Mandibular Paramolars. Int J Clin Pediatr Dent 2014;7(1):40-42. PMID:25206236

  18. Bilateral Nipple Leiomyoma

    PubMed Central

    Kapakli, Mahmut Sertan; Altintoprak, Fatih; Cayırcı, Mine; Manukyan, Manuk Norayk; Kebudi, Abut

    2013-01-01

    Cutaneous leiomyomas are benign smooth muscle neoplasms of the skin. They arise from vascular, arrector pili, genital, and areolar smooth muscles. The most common localizations of cutaneous leiomyomas are the extensor surfaces of the extremities and the trunk. To our knowledge, only few cases of one-sided nipple leiomyomas have been reported, but two-sided nipple leiomyomas have not been presented. For the first time, here, we report a bilateral nipple leiomyoma. PMID:23762734

  19. Effects of Bilateral Eye Movements on Gist Based False Recognition in the DRM Paradigm

    ERIC Educational Resources Information Center

    Parker, Andrew; Dagnall, Neil

    2007-01-01

    The effects of saccadic bilateral (horizontal) eye movements on gist based false recognition was investigated. Following exposure to lists of words related to a critical but non-studied word participants were asked to engage in 30s of bilateral vs. vertical vs. no eye movements. Subsequent testing of recognition memory revealed that those who…

  20. Compressive Bilateral Filtering.

    PubMed

    Sugimoto, Kenjiro; Kamata, Sei-Ichiro

    2015-11-01

    This paper presents an efficient constant-time bilateral filter that produces a near-optimal performance tradeoff between approximate accuracy and computational complexity without any complicated parameter adjustment, called a compressive bilateral filter (CBLF). The constant-time means that the computational complexity is independent of its filter window size. Although many existing constant-time bilateral filters have been proposed step-by-step to pursue a more efficient performance tradeoff, they have less focused on the optimal tradeoff for their own frameworks. It is important to discuss this question, because it can reveal whether or not a constant-time algorithm still has plenty room for improvements of performance tradeoff. This paper tackles the question from a viewpoint of compressibility and highlights the fact that state-of-the-art algorithms have not yet touched the optimal tradeoff. The CBLF achieves a near-optimal performance tradeoff by two key ideas: 1) an approximate Gaussian range kernel through Fourier analysis and 2) a period length optimization. Experiments demonstrate that the CBLF significantly outperforms state-of-the-art algorithms in terms of approximate accuracy, computational complexity, and usability. PMID:26068315

  1. Intraoral pH and temperature during sleep with and without mouth breathing.

    PubMed

    Choi, J E; Waddell, J N; Lyons, K M; Kieser, J A

    2016-05-01

    To measure and compare the intraoral pH and temperature of individuals during sleep with and without mouth breathing. Ten healthy participants [mean age = 25·8 (± 4·3)] wore a custom-made appliance fitted with a pH probe and thermocouple for two sets of 48 h. Continuous pH and temperature measurements were taken from the palatal aspect of the upper central incisors. To simulate mouth breathing during sleep, participants wore a nose clip for two nights of the four, with the first group (n = 5) wearing the nose clip during the first night and the rest (n = 5) wearing the nose clip during the second night of sleep to balance any potential bias from the wearing sequence. Both qualitative and quantitative analyses were conducted. The mean intraoral pH during daytime was 7·3 (± 0·4) and during sleep was 7·0 (± 0·5). The mean intraoral pH during sleep with mouth breathing was 6·6 (± 0·5), which was statistically significant compared with the normal sleep condition (P < 0·01). The intraoral pH decreased slowly over the hours of sleep in all participants. When sleeping with forced mouth breathing, intraoral pH showed a greater fall over a longer period of time. The mean intraoral temperature was 33·1 °C (± 5·2) during daytime and 33·3 °C (± 6·1) during sleep, with no statistical significance between sleep with and without mouth breathing (P > 0·05). The results suggest that mouth breathing during sleep is related to a decrease in intraoral pH compared with normal breathing during sleep, and this has been proposed as a causal factor for dental erosion and caries. PMID:26666708

  2. Intra-oral Dirofilaria repens infection: report of seven cases.

    PubMed

    Tilakaratne, W M; Pitakotuwage, T N

    2003-09-01

    Cutaneous dirofilariasis usually affects animals such as cats and dogs which are known to be the natural host of Dirofilaria. Dirofilariasis displays a worldwide distribution. Certain geographic regions account for the majority of reported cases. South-eastern United States, Australia and Europe have been identified as endemic regions (1, 2). However, new endemic areas are arising with increased awareness in African and Asian regions. Out of about 40 different species of Dirofilaria only a few species are commonly known to infect man, namely Dirofilaria immitus, D. tenices and D. repens. Human infection occurs when a human becomes a blood meal of an infected arthropod vector and on accidental entering of the worm. Rarely this zoonotic infection affects the oral mucosa (3). Man is the dead end of this parasite. Since the human body is an abnormal environment for the parasite, the development of the larvae is inhibited by means of retardation of sexual maturity. Lesions are presented as single non-tender subcutaneous nodules, and most patients are asymptomatic. Diagnosis is established by H&E sections prepared from excised nodules. In a majority of the cases, only a single worm either a male or a female could be identified. The worm is usually dead and degenerated with a massive inflammatory cell infiltration. Seven new cases presented as intra-oral nodules with their clinicopathological correlation are discussed. PMID:12901735

  3. Fatigue failure of dental implants in simulated intraoral media.

    PubMed

    Shemtov-Yona, K; Rittel, D

    2016-09-01

    Metallic dental implants are exposed to various intraoral environments and repetitive loads during service. Relatively few studies have systematically addressed the potential influence of the environment on the mechanical integrity of the implants, which is therefore the subject of this study. Four media (groups) were selected for room temperature testing, namely dry air, saliva substitute, same with 250ppm of fluoride, and saline solution (0.9%). Monolithic Ti-6Al-4V implants were loaded until fracture, using random spectrum loading. The study reveals that the only aggressive medium of all is the saline solution, as it shortens significantly the spectrum fatigue life of the implants. The quantitative scanning electron fractographic analysis indicates that all the tested implants grew fatigue cracks of similar lengths prior to catastrophic fracture. However, the average crack growth rate in the saline medium was found to largely exceed that in other media, suggesting a decreased fracture toughness. The notion of a characteristic timescale for environmental degradation was proposed to explain the results of our spectrum tests that blend randomly low and high cycle fatigue. Random spectrum fatigue testing is powerful technique to assess and compare the mechanical performance of dental implants for various designs and/or environments. PMID:27353062

  4. Intraoral approach for reduction malarplasty: a simple method.

    PubMed

    Lee, Jin-Gew; Park, Young-Wook

    2003-01-01

    Young Korean women with prominent zygoma may experience stress in daily life because the Oriental physiognomy often associates prominent zygoma with bad luck. Moreover, prominent zygoma in a wide Oriental face has the effect of making a person appear older and stubborn. Zygomatic reduction is often necessary to relieve stress from self-consciousness about facial appearance and to obtain younger and softer features. As such, most zygomatic procedures are cosmetic; therefore, an entirely intraoral approach with no skin incision is desirable. The current operative method of zygomatic reduction consists of two steps. The zygomatic body and arch are exposed through a mucoperiosteal incision from the maxillary canine to the first molar area. The first step is to grind and file the zygomatic body. The second step is made on the zygomatic arch. Using an oscillating saw, a partial-thickness osteotomy is made just posterior to the orbital rim, and a full-thickness osteotomy is made just anterior to the articular tubercle of the zygomatic arch. Light pressure on the posterior part of the arch produces a greenstick fracture of the anterior osteotomy site and a complete fracture of the posterior osteotomy site, resulting in inward repositioning of the zygomatic arch. This method of zygomatic reduction is simple, easy, effective, and leaves no conspicuous scars on the face. PMID:12496618

  5. Function and appearance following surgery for intraoral cancer.

    PubMed

    Marchetta, F C

    1976-07-01

    Operations for intraoral carcinoma do produce deformities and loss of function. Historically, surgeons have constantly tried to correct or improve these deficiencies. The tendency on the part of the surgeon is to replace each bit of tissue removed, hoping that if the site appears normal the patient will be normal. The appearance of the patient has as a rule been given more attention than the functional result. Dysfunction is related to the alteration of certain anatomic and physiologic conditions identified as: (1) inability to obliterate the anterior oral cavity, (2) defects in the palate, (3) inability to close off the oropharyngeal space, and (4) disturbance of normal channels to bypass the larynx. Lateral mandibulectomy and radical neck dissection performed for cancer of the retromolar area, lower gum, lateral tongue, or floor of the mouth will in most instances result in very acceptable cosmetic and functional results. These patients look well, speak well, eat and swallow well, and can assume their usual role in society. Further surgical attempts to improve any deficiencies are discouraged. Patients sometimes ask about bone grafting or devices to replace the resected mandible and our recommendations are very emphatic on the negative side. PMID:963952

  6. Measurement of intraoral muscle forces during functional exercises.

    PubMed

    Lindeman, D E; Moore, R N

    1990-04-01

    Measurements of intraoral muscle force with foil strain gauges, load cells, and pressure transducers bonded to a Tru-Tain stent and to a lip bumper appliance were tested by means of seven functional exercises in five adult subjects over a 5-day interval. The measuring devices and the functional exercises were tested for replicability and validity. Results showed that the pressure transducer was the superior measuring device with respect to size, sensitivity, thermal compensation, factory uniformity, replicability, and validity. The device most susceptible to error, on the basis of these factors, was the foil strain gauge. Of the seven functional exercises used, the pronunciation of the words "phone," "mom," and "church" and the exercise of swallowing were replicable over time. The other three exercises--chewing gum, sucking, and blowing on a straw--were determined to be unreliable in terms of replicability over time. Overall pressure values recorded were significantly higher than in previous reports. Pressure values were higher for the Tru-Tain stent than for the lip bumper. PMID:2321595

  7. Geometric estimation method for x-ray digital intraoral tomosynthesis

    NASA Astrophysics Data System (ADS)

    Li, Liang; Yang, Yao; Chen, Zhiqiang

    2016-06-01

    It is essential for accurate image reconstruction to obtain a set of parameters that describes the x-ray scanning geometry. A geometric estimation method is presented for x-ray digital intraoral tomosynthesis (DIT) in which the detector remains stationary while the x-ray source rotates. The main idea is to estimate the three-dimensional (3-D) coordinates of each shot position using at least two small opaque balls adhering to the detector surface as the positioning markers. From the radiographs containing these balls, the position of each x-ray focal spot can be calculated independently relative to the detector center no matter what kind of scanning trajectory is used. A 3-D phantom which roughly simulates DIT was designed to evaluate the performance of this method both quantitatively and qualitatively in the sense of mean square error and structural similarity. Results are also presented for real data acquired with a DIT experimental system. These results prove the validity of this geometric estimation method.

  8. Bilateral symmetry across Aphrodite Terra

    NASA Technical Reports Server (NTRS)

    Crumpler, L. S.; Head, J. W.; Campbell, D. B.

    1987-01-01

    There are three main highland areas on Venus: Beta Regio, Ishtar Terra and Aphrodite Terra. The latter is least known and the least mapped, yet existing analyses of Aphrodite Terra based on available Pioneer-Venus orbiter data suggest that it may be the site of extensive rifting. Some of the highest resolution (30 km) PV data (SAR) included most of the western half of Aphrodite Terra. Recent analysis of the SAR data together with Arecibo range-doppler topographic profiling (10 X 100 km horizontal and 10 m vertical resolution) across parts of Aphrodite, further characterized the nature of possible tectonic processes in the equatorial highlands. The existence of distinct topographic and radar morphologic linear discontinuities across the nearly east-west strike of Aphrodite Terra is indicated. Another prominent set of linear features is distinctly parallel to and orthogonal to the ground tracks of the PV spacecraft and are not included because of the possibility that they are artifacts. Study of the northwest trending cross-strike discontinuities (CSD's) and the nature of topographic and morphologic features along their strike suggest the presence of bilateral topographic and morphologic symmetry about the long axis of Aphrodite Terra.

  9. Evidence - The intraoral palpability of the lateral pterygoid muscle - A prospective study.

    PubMed

    Stelzenmueller, Wolfgang; Umstadt, Horst; Weber, Dominic; Goenner-Oezkan, Volkan; Kopp, Stefan; Lisson, Jörg

    2016-07-01

    The intraoral palpability of the inferior caput of the lateral pterygoid muscle has been a matter of ambiguity because of its topography. Thus, none of the recently published studies has provided reliable proof of the possibility of digital intraoral palpation, although palpation of the muscle is part of most of the examination catalogs for clinical functional analysis and functional therapy. Digital muscle palpation was performed intraorally on five preparations after exposure of the infratemporal fossa and visualization of the lateral pterygoid muscle. Direct digital palpation of the lateral pterygoid muscle was seen in all five cases. The successful palpation was carried out and approved during laterotrusion to the examined side (relaxation). While opening and closing the mouth (contraction) the muscle is palpable. In real-time kinematic measurements (MRI) an impression of the lateral caput of the left lateral pterygoid muscle of a 30-year-old control male person was found up to 6mm. Electromyographic detection by direct signal conduction with concomitant palpation is possible. The injection electrode tested in situ in the muscle was felt transorally with the palpating finger. The intraoral palpability of the inferior caput of the lateral pterygoid muscle is verified. The basic requirement for successfully palpating the lateral pterygoid muscle is the exact knowledge of muscle topography and the intraoral palpation pathway. After documented palpation of the muscle belly in cadaverous preparations, MRI and EMG also visualized palpation of the lateral pterygoid muscle in vivo. The palpation technique seems to be essential and basically feasible. PMID:26706107

  10. Synchronous Bilateral Breast Cancers

    PubMed Central

    Subramanyan, Annapurneswari; Radhakrishna, Selvi

    2015-01-01

    Background Bilateral breast cancer (BBC) is not an uncommon entity in contemporary breast clinics. Improved life expectancy after breast cancer treatment and routine use of contra-lateral breast mammography has led to increased incidence of BBC. Our study objective was to define the epidemiological and tumour characteristics of BBC in India. Materials and Methods A total of 1251 breast cancer patients were treated during the period January 2007 to March 2015 and 30 patients were found to have BBC who constituted the study population (60 tumour samples). Synchronous bilateral breast cancers (SBC) was defined as two tumours diagnosed within an interval of 6 months and a second cancer diagnosed after 6 months was labelled as metachronous breast cancer (MBC). Analyses of patient and tumour characteristics were done in this prospective data base of BBC patients. Results Median patient age was 66 years (range 39-85). Majority of the patients had SBC (n=28) and in 12 patients the second tumour was clinically occult and detected only by mammography of the contra-lateral breast. The second tumour was found at lower tumour size compared to the first in 73% of cases and was negative for axillary metastasis in 80% of cases (24/30). Infiltrating ductal carcinoma was the commonest histological type (n=51) and majority of the tumours were ER/PR positive (50/60). Her2 was overexpressed in 13 tumours (21%). Over 70% (22/30) of patients had similar histology in both breasts and amongst them grade concordance was present in about 69% (15/22) of patients. Concordance rates of ER, PR and Her2 statuses were 83%, 80% and 90% respectively. Bilateral mastectomy was the commonest surgery performed in 80% of the patients followed by bilateral breast conservation in 13%. At the end of study period, 26 patients were alive and disease free. Median survival was 29 months (range 3-86 months). Conclusion In most patients with BBC, the second tumour is identified at an early stage than index

  11. Description and evaluation of an intraoral cervical plexus anesthetic technique.

    PubMed

    Bitner, Daniel P; Uzbelger Feldman, Daniel; Axx, Kevin; Albandar, Jasim M

    2015-07-01

    Unsuccessful anesthesia of the inferior alveolar nerve (IAN) may be due to supplementary innervations of mandibular molars from other branches, namely the cervical plexus (CP). The purpose of this prospective, randomized, double-blind, controlled trial was to determine the effectiveness of an intraoral cervical plexus anesthetic technique (ICPAT) in mandibular molars with symptomatic irreversible pulpitis (SIR) when the IAN and lingual nerve (LN) blocks failed, and to provide a description of the technique. Forty patients diagnosed with SIR received IAN and LN block anesthesia prior to treatment. After clinical signs of anesthesia, patients were subjected to an electrical pulp test (EPT) at 2-min cycles for 10 min post-injection. The anesthesia was considered unsuccessful if there was a positive EPT response ten minutes following profound lip numbness. The experimental group (n = 20) were administered 2% Lidocaine with 1:100,000 epinephrine using the ICPAT. The control group (n = 20) were administered 0.9% sterile saline using the ICPAT. Success was defined as no response on two consecutive readings from an EPT. In the experimental group, 60% of subjects showed successful anesthesia, whereas none of the subjects in the control group had successful anesthesia. A multiple logistic regression analysis showed that the anesthesia success rate using the ICPAT method was significantly higher (P < 0.05) than in the control group, irrespective of molar tooth type. The ICPAT method may be useful as a supplementary anesthetic technique for mandibular molars with SIR in subjects whom the IAN and LN blocks do not provide adequate anesthesia. PMID:25864872

  12. IDEFIX: identification of dental fixtures in intraoral x rays

    NASA Astrophysics Data System (ADS)

    Lehmann, Thomas M.; Schmitt, Walter; Horn, Harald; Hillen, Walter

    1996-04-01

    In dental implantology more than one hundred enossal implant systems are in use. Once embedded, the dental x-ray examination is the most important tool for determining implants' producer, name, and type. In this paper, we present a system for automatic detection and identification of dental fixtures in intraoral x rays (IDEFIX) combining common direct digital image acquisition techniques with specially designed image analysis. IDEFIX can process any digital radiograph (e.g. RVG, Sens-A-Ray, Schick, Sidexis, Digora) as well as digitized dental films. A reference database has been generated by precise measurement on the implant systems used so far (eight implants) including parameters like length, diameter, and cross section area. After binarization of the current digital x-ray image, a parameter set is extracted from each detected object applying mathematical morphology. All objects are classified using a simplified nearest neighbor method and the Euclidean distance metric. If the distance of the objects' parameter set to one of the reference sets is below a given threshold, name and type of the identified dental fixture are displayed on the screen. Otherwise, the actual object will be rejected as a no-implant. IDEFIX has been evaluated by processing various in-vitro acquired radiographs. Different implants were classified captured with identical conditions as well as acquired varying the angulation of the x-ray tube. It is shown that misangulations up to twenty degrees are tolerable preserving correct identification. Other image structures like teeth or fillings result in large distances to all reference parameter sets and, therefore, they are reliably recognized as non-implants.

  13. Development of an intraoral device for social inclusion of a physically disabled patient.

    PubMed

    de Mesquita-Guimarães, Késsia Suênia Fidelis; Ferreira, Danielly Cunha Araújo; da Silva, Raquel Assed Bezerra; Díaz-Serrano, Kranya Victoria; de Queiroz, Alexandra Mussolino; Mantovani, Carolina Paes Torres; De Rossi, Andiara

    2016-01-01

    The aim of this study is to describe the use of an intraoral assistive technology for a patient with idiopathic generalized muscular dystonia, presenting temporomandibular disorder and severe anterior tooth mobility and diastema. A multidisciplinary team developed an intraoral device to provide typing and painting functions, and promote relaxation of masticatory muscles without compromising the teeth and supporting tissue structures. The occlusal splint associated with the device promoted muscle relaxation and relief of the signs and symptoms of temporomandibular dysfunction, in this case with generalized muscle dystonia, allowing typing and painting with her mouth without causing tooth mobility or occlusal alteration. This intraoral device has low cost, easy adaptation and was efficient in TMD symptoms. Furthermore, the patient returned to her rehabilitation allowing performance of her duties without compromising dental structures, facilitating the social and the digital inclusion. PMID:26578336

  14. New device for collecting intra-oral findings of unknown body.

    PubMed

    Hanaoka, Yoichi; Tsuzuki, Tamiyuki; Yoshida, Masaki; Iwahara, Kaori; Suyama, Yuji; Matsukubo, Takashi; Sato, Yoshinobu; Minaguchi, Kiyoshi

    2011-01-01

    In dental identification, the collection of intra-oral images is extremely important. We propose the Dental Watch(®) as a new device for collecting intra-oral findings in situations where sufficient jaw-opening or adequate lighting cannot be obtained in such cases of dead bodies within a day after death or burned bodies encountered in mass disaster. This device is an improved home video camera for taking intra-oral images. It is lightweight and cordless, allowing it to be operated with one hand, and an audio function allows comments to be made and recorded on obtaining findings at the same time as images are taken. In addition, this device allows images of the entire oral cavity to be taken comparatively easily, even when only a minimal degree of jaw movement is available. This device is extremely useful in situations where a single dentist inspector must obtain findings and make an accurate and detailed Dental Chart. PMID:21986397

  15. Bilateral posterior sternoclavicular dislocation.

    PubMed

    Baumann, Matthias; Vogel, Tobias; Weise, Kuno; Muratore, Tim; Trobisch, Per

    2010-07-01

    Posterior sternoclavicular dislocations are a rare injury, representing <5% of all sternoclavicular dislocations and 1 in 1600 shoulder girdle injuries. Proper imaging with computed tomography and prompt diagnosis are essential steps in preventing potentially lethal complications observed in approximately 3% of all posterior sternoclavicular dislocations. Surgical treatment is necessary if closed reduction fails. With the medial clavicular epiphysis being the last to close (between ages 22 and 25), children and adolescents typically present with epiphyseal fractures rather than joint dislocations. If closed reduction fails, open reduction and internal fixation (ORIF) should be considered in fractures, whereas complex reconstructions with tendon graft procedures have been recommended for joint dislocations. This article presents a case of a traumatic bilateral posterior sternoclavicular dislocation due to an epiphyseal fracture in a 15-year-old boy. To our knowledge, this is the first reported case of a bilateral posterior sternoclavicular dislocation. Attempted closed reduction failed with redislocation after 2 days. The patient subsequently required ORIF. This article describes our technique with anterior retraction of the medial clavicle, closure of the posterior periosteum, and ORIF using nonabsorbable sutures. Postoperative shoulder mobilization was started on day 1. At final follow-up, the patient was completely asymptomatic. PMID:20608625

  16. Proximal caries detection accuracy using intraoral bitewing radiography, extraoral bitewing radiography and panoramic radiography

    PubMed Central

    Kamburoğlu, K; Kolsuz, E; Murat, S; Yüksel, S; Özen, T

    2012-01-01

    Objective To compare proximal caries detection using intraoral bitewing, extraoral bitewing and panoramic radiography. Methods 80 extracted human premolar and molar teeth with and without proximal caries were used. Intraoral radiographs were taken with Kodak Insight film (Eastman Kodak Co., Rochester, NY) using the bitewing technique. Extraoral bitewing and panoramic images were obtained using a Planmeca Promax Digital Panoramic X-ray unit (Planmeca Inc., Helsinki, Finland). Images were evaluated by three observers twice. In total, 160 proximal surfaces were assessed. Intra- and interobserver kappa coefficients were calculated. Scores obtained from the three techniques were compared with the histological gold standard using receiver operating characteristic analysis. Az values for each image type, observer and reading were compared using z-tests, with a significance level of α = 0.05. Results Kappa coefficients ranged from 0.883 to 0.963 for the intraoral bitewing, from 0.715 to 0.893 for the extraoral bitewing, and from 0.659 to 0.884 for the panoramic radiography. Interobserver agreements for the first and second readings for the intraoral bitewing images were between 0.717 and 0.780, the extraoral bitewing readings were between 0.569 and 0.707, and the panoramic images were between 0.477 and 0.740. The Az values for both readings of all three observers were highest for the intraoral bitewing. Az values for the extraoral bitewing images were higher than those of the panoramic images without statistical significance (p > 0.05). Conclusion Intraoral bitewing radiography was superior to extraoral bitewing and panoramic radiography in diagnosing proximal caries of premolar and molar teeth ex vivo. Similar intra- and interobserver coefficients were calculated for extraoral bitewing and panoramic radiography. PMID:22868296

  17. Accuracy of Intraoral Digital Impressions for Whole Upper Jaws, Including Full Dentitions and Palatal Soft Tissues

    PubMed Central

    Gan, Ning; Xiong, Yaoyang; Jiao, Ting

    2016-01-01

    Intraoral digital impressions have been stated to meet the clinical requirements for some teeth-supported restorations, though fewer evidences were proposed for larger scanning range. The aim of this study was to compare the accuracy (trueness and precision) of intraoral digital impressions for whole upper jaws, including the full dentitions and palatal soft tissues, as well as to determine the effect of different palatal vault height or arch width on accuracy of intraoral digital impressions. Thirty-two volunteers were divided into three groups according to the palatal vault height or arch width. Each volunteer received three scans with TRIOS intraoral scanner and one conventional impression of whole upper jaw. Three-dimensional (3D) images digitized from conventional gypsum casts by a laboratory scanner were chose as the reference models. All datasets were imported to a specific software program for 3D analysis by "best fit alignment" and "3D compare" process. Color-coded deviation maps showed qualitative visualization of the deviations. For the digital impressions for palatal soft tissues, trueness was (130.54±33.95)μm and precision was (55.26±11.21)μm. For the digital impressions for upper full dentitions, trueness was (80.01±17.78)μm and precision was (59.52±11.29)μm. Larger deviations were found between intraoral digital impressions and conventional impressions in the areas of palatal soft tissues than that in the areas of full dentitions (p<0.001). Precision of digital impressions for palatal soft tissues was slightly better than that for full dentitions (p = 0.049). There was no significant effect of palatal vault height on accuracy of digital impressions for palatal soft tissues (p>0.05), but arch width was found to have a significant effect on precision of intraoral digital impressions for full dentitions (p = 0.016). A linear correlation was found between arch width and precision of digital impressions for whole upper jaws (r = 0.326, p = 0

  18. THE VERTICAL

    NASA Technical Reports Server (NTRS)

    Albert, Stephen L.; Spencer, Jeffrey B.

    1994-01-01

    'THE VERTICAL' computer keyboard is designed to address critical factors which contribute to Repetitive Motion Injuries (RMI) (including Carpal Tunnel Syndrome) in association with computer keyboard usage. This keyboard splits the standard QWERTY design into two halves and positions each half 90 degrees from the desk. In order to access a computer correctly. 'THE VERTICAL' requires users to position their bodies in optimal alignment with the keyboard. The orthopaedically neutral forearm position (with hands palms-in and thumbs-up) reduces nerve compression in the forearm. The vertically arranged keypad halves ameliorate onset occurrence of keyboard-associated RMI. By utilizing visually-reference mirrored mylar surfaces adjustable to the user's eye, the user is able to readily reference any key indicia (reversed) just as they would on a conventional keyboard. Transverse adjustability substantially reduces cumulative musculoskeletal discomfort in the shoulders. 'THE VERTICAL' eliminates the need for an exterior mouse by offering a convenient finger-accessible curser control while the hands remain in the vertically neutral position. The potential commercial application for 'THE VERTICAL' is enormous since the product can effect every person who uses a computer anywhere in the world. Employers and their insurance carriers are spending hundreds of millions of dollars per year as a result of RMI. This keyboard will reduce the risk.

  19. Bilateral Traumatic Anterior Dislocation of Shoulder - A Rare Entity

    PubMed Central

    Kumar, Yashavantha C; Nalini, K B; Maini, Lalit; Nagaraj, Prashanth

    2013-01-01

    Introduction: Bilateral shoulder dislocation are most commonly posterior type. These are most commonly due to seizure disorder and electrocution. Anterior shoulder dislocations occurring bilaterally without any predisposing factors are very rare. These types of injuries are due to trauma with a unique mechanism of injury. To best of our knowledge there are only few cases of similar kind are reported in literature. We hereby report a interesting case of posttraumatic, bilateral anterior dislocation of shoulder without associated fracture in a 45 old women without any predisposing pathoanatomy. Case report: A 45-year-old women presented to casualty with sudden onset of pain and restriction of movement in both shoulders fallowing trauma. Immediately post trauma she had severe pain and restriction of both shoulders. On examination arms were abducted and externally rotated. Bilateral shoulder movements were painful and restricted. There was loss of round contour of shoulder with increased vertical diameter of axilla anteriorly. Radiological examination revealed bilateral anterior dislocation of the shoulders without any associated fractures. Closed reduction done by Milch technique after intraraticular lignocaine injection. MRI of bilateral shoulder showed no pathological lesion. Both shoulders were immobilized with a shoulder immobilizer for three weeks. Conclusion: Most of the bilateral shoulder dislocations are posterior type seen in seizure disorders. Bilateral traumatic anterior shoulder dislocations are rare and are seen as a result of unique mechanism of injury. In our case patient had a fall on her elbows causing forced extension. If diagnosed and treated promptly completely normal function of the shoulders can be restored. PMID:27298892

  20. Finite-Element Analysis of a New Designed Miniplate which is Used via Intraoral Approach to the Mandible Angle Fracture: Comparison of the Different Fixation Techniques.

    PubMed

    Coskunses, Fatih Mehmet; Kocyigit, Ismail Doruk; Atil, Fethi; Tekin, Umut; Suer, Berkay Tolga; Tuz, Hakan Hifzi; Ozgul, Ozkan; Yagiz, Ayberk

    2015-07-01

    The mandible is the largest facial bone as well as the most commonly fractured bone in the maxillofacial region. Despite numerous studies conducted to identify optimal treatment modalities and plates configurations for intraoral and transoral approaches, no definitive conclusion has been reached. This study used finite element analysis (FEA) to assess 4 scenarios for treatment of an angle fracture (6-hole noncompression miniplate; 6-hole single plate/Champy's technique, 3D strut plate; 2 parallel 4-hole noncompression miniplates). Analysis included segmental displacement and Von Mises Stress evaluations of a 3D reconstruction of a human mandible. Von Mises Stress values for plates did not vary significantly among treatment groups. Moreover, no significant differences were observed in cumulative displacement of segments subjected to vertical and horizontal loads, with all treatment configurations demonstrating clinical acceptability. PMID:26091053

  1. Influence of scanning strategies on the accuracy of digital intraoral scanning systems.

    PubMed

    Ender, A; Mehl, A

    2013-01-01

    The digital intraoral impression is a central part in today's CAD/CAM dentistry. With its possibilities, new treatment options for the patient is provided and the prosthetic workflow is accelerated. Nowadays, the major issue with intraoral scanning systems is to gain more accuracy especially for larger scan areas and to simplify clinical handling for the dentist. The aim of this study was to investigate different scanning strategies regardingtheir accuracy with full arch scans in an in-vitro study design. A reference master model was used for the digital impressions with the Lava COS, the Cerec Bluecam and a powderfree intraoral scanning system, Cadent iTero. The trueness and precision of each scanning protocol was measured. Lava COS provides the a trueness of 45.8 microm with the scanning protocol recommended from the manufacturer. A different scanning protocol shows significantly lower accuracy (trueness +/- 90.2 microm). Cerec Bluecam also benefits from an optimal scanning protocol with a trueness of +/- 23.3 microm compared to +/- 52.5 microm with a standard protocol. The powderfree impression system Cadent iTero shows also a high accurate full-arch scan with a trueness of +/- 35.0 microm and a precision of +/- 30.9 microm. With the current intraoral scanning systems, full arch dental impressions are possible with a high accuracy, if adequate scan strategies are used. The powderfree scanning system provides the same level of accuracy compared to scanning systems with surface pretreatment. PMID:23641661

  2. Immediate loading of zygomatic implants using the intraoral welding technique: a 12-month case series.

    PubMed

    Degidi, Marco; Nardi, Diego; Piattelli, Adriano; Malevez, Chantal

    2012-10-01

    The aim of this prospective study was to evaluate the concept of intraoral welding as a suitable technique for fabricating a fixed restoration for the edentulous maxilla the day of surgery using standard and zygomatic implants. Ten consecutive patients (four men, six women; mean age, 62.3 ± 11.6 years) were involved in this study, each of whom had an edentulous atrophic maxilla and received two standard and two zygomatic implants. All implants were loaded immediately with a fixed prosthesis supported by an intraorally welded titanium framework. Definitive abutments were connected to the implants, and a titanium bar was welded to them using an intraoral welding unit. This framework was used to support the definitive prosthesis, which was fitted the day of implant placement. Patients were checked for swelling, pain, and framework stability at 1, 3, 6, and 12 months. A total of 20 immediately loaded standard and 20 zygomatic implants were used. The cases included in this study achieved a 100% prosthetic success rate at the 12-month follow-up. No fracture or radiographically detectable alteration of the welded frameworks was noticed. It is possible to successfully rehabilitate the edentulous atrophic maxilla with a permanently fixed prosthesis supported by an intraorally welded titanium framework attached to standard and zygomatic implants the day of surgery. PMID:22754908

  3. Fabrication of a multi-applicable removable intraoral denture system for rodent research

    PubMed Central

    Lee, Heeje; Yu, Alika; Johnson, Clorinda C.; Noverr, Mairi C.; Fidel, Paul L.

    2011-01-01

    SUMMARY The objective was to engineer an inexpensive intraoral removable denture system for rodents that can be utilized in numerous oral health research applications. At the forefront is biofilm research related to Candida-associated denture stomatitis. Previously described intraoral devices are primitive and inadequate. The denture system was engineered consisting of a fixed part that is anchored to the posterior palate by orthodontic wires and acrylic resin, and a removable part fitted to the anterior palate that is retained by magnets embedded in the fixed part. Both parts are custom-fitted to the rodent palate by impression making and cast fabrication. Rats fitted with the intraoral denture system maintained body weight and normal activity with the device maintaining integrity and durability for upwards of 8 weeks. The denture system was used successfully to establish a working model of denture stomatitis. This newly engineered inexpensive intraoral removable denture system for rodents can be utilized in numerous oral health research applications, including denture-associated infections, biofilms, and a variety of biomaterial applications. The removable portion is advantageous for longitudinal analyses and charging/discharging of biomaterials. PMID:21323935

  4. Reduced misinformation effects following saccadic bilateral eye movements.

    PubMed

    Parker, Andrew; Buckley, Sharon; Dagnall, Neil

    2009-02-01

    The effects of saccadic bilateral (horizontal) eye movements on memory for a visual event narrative were investigated. In the study phase, participants were exposed to a set of pictures accompanied by a verbal commentary describing the events depicted in the pictures. Next, the participants were asked either misleading or control questions about the depicted event and were then asked to engage in 30s of bilateral vs. vertical vs. no eye movements. Finally, recognition memory was tested using the remember-know procedure. It was found that bilateral eye movements increased true memory for the event, increased recollection, and decreased the magnitude of the misinformation effect. The findings are discussed in terms of source monitoring, dual-process theories of memory and the potential neural foundations of such effects. PMID:18635303

  5. Accuracy of intraoral and extraoral digital data acquisition for dental restorations

    PubMed Central

    Rudolph, Heike; Salmen, Harald; Moldan, Matthias; Kuhn, Katharina; Sichwardt, Viktor; Wöstmann, Bernd; Luthardt, Ralph Gunnar

    2016-01-01

    ABSTRACT The computer-aided design (CAD) and computer-aided manufacturing (CAM) process chain for dental restorations starts with taking an impression of the clinical situation. For this purpose, either extraoral digitization of gypsum models or intraoral digitization can be used. Despite the increasing use of dental digitizing systems, there are only few studies on their accuracy. Objective This study compared the accuracy of various intraoral and extraoral digitizing systems for dental CAD/CAM technology. Material and Methods An experimental setup for three-dimensional analysis based on 2 prepared ceramic master dies and their corresponding virtual CAD-models was used to assess the accuracy of 10 extraoral and 4 intraoral optical non-contact dental digitizing systems. Depending on the clinical procedure, 10 optical measurements of either 10 duplicate gypsum dies (extraoral digitizing) or directly of the ceramic master dies (intraoral digitizing) were made and compared with the corresponding CAD-models. Results The digitizing systems showed differences in accuracy. However, all topical systems were well within the benchmark of ±20 µm. These results apply to single tooth measurements. Conclusions Study results are limited, since only single teeth were used for comparison. The different preparations represent various angles and steep and parallel opposing tooth surfaces (incisors). For most digitizing systems, the latter are generally the most difficult to capture. Using CAD/CAM technologies, the preparation angles should not be too steep to reduce digitizing errors. Older systems might be limited to a certain height or taper of the prepared tooth, whereas newer systems (extraoral as well as intraoral digitization) do not have these limitations. PMID:27008261

  6. Accuracy of intraoral and extraoral digital data acquisition for dental restorations.

    PubMed

    Rudolph, Heike; Salmen, Harald; Moldan, Matthias; Kuhn, Katharina; Sichwardt, Viktor; Wöstmann, Bernd; Luthardt, Ralph Gunnar

    2016-02-01

    The computer-aided design (CAD) and computer-aided manufacturing (CAM) process chain for dental restorations starts with taking an impression of the clinical situation. For this purpose, either extraoral digitization of gypsum models or intraoral digitization can be used. Despite the increasing use of dental digitizing systems, there are only few studies on their accuracy. Objective This study compared the accuracy of various intraoral and extraoral digitizing systems for dental CAD/CAM technology. Material and Methods An experimental setup for three-dimensional analysis based on 2 prepared ceramic master dies and their corresponding virtual CAD-models was used to assess the accuracy of 10 extraoral and 4 intraoral optical non-contact dental digitizing systems. Depending on the clinical procedure, 10 optical measurements of either 10 duplicate gypsum dies (extraoral digitizing) or directly of the ceramic master dies (intraoral digitizing) were made and compared with the corresponding CAD-models. Results The digitizing systems showed differences in accuracy. However, all topical systems were well within the benchmark of ±20 µm. These results apply to single tooth measurements. Conclusions Study results are limited, since only single teeth were used for comparison. The different preparations represent various angles and steep and parallel opposing tooth surfaces (incisors). For most digitizing systems, the latter are generally the most difficult to capture. Using CAD/CAM technologies, the preparation angles should not be too steep to reduce digitizing errors. Older systems might be limited to a certain height or taper of the prepared tooth, whereas newer systems (extraoral as well as intraoral digitization) do not have these limitations. PMID:27008261

  7. Management of painful temporomandibular joint clicking with different intraoral devices and counseling: a controlled study

    PubMed Central

    CONTI, Paulo César Rodrigues; CORRÊA, Ana Silvia da Mota; LAURIS, José Roberto Pereira; STUGINSKI-BARBOSA, Juliana

    2015-01-01

    Objective The benefit of the use of some intraoral devices in arthrogenous temporomandibular disorders (TMD) patients is still unknown. This study assessed the effectiveness of the partial use of intraoral devices and counseling in the management of patients with disc displacement with reduction (DDWR) and arthralgia. Materials and Methods A total of 60 DDWR and arthralgia patients were randomly divided into three groups: group I (n=20) wore anterior repositioning occlusal splints (ARS); group II (n=20) wore the Nociceptive Trigeminal Inhibition Clenching Suppression System devices (NTI-tss); and group III (n=20) only received counseling for behavioral changes and self-care (the control group). The first two groups also received counseling. Follow-ups were performed after 2 weeks, 6 weeks and 3 months. In these sessions, patients were evaluated by means of a visual analogue scale, pressure pain threshold (PPT) of the temporomandibular joint (TMJ), maximum range of motion and TMJ sounds. Possible adverse effects were also recorded, such as discomfort while using the device and occlusal changes. The results were analyzed with ANOVA, Tukey’s and Fisher Exact Test, with a significance level of 5%. Results Groups I and II showed improvement in pain intensity at the first follow-up. This progress was recorded only after 3 months in Group III. Group II showed an increased in joint sounds frequency. The PPT values, mandibular range of motion and the number of occlusal contacts did not change significantly. Conclusion The simultaneous use of intraoral devices (partial time) plus behavioral modifications seems to produce a more rapid pain improvement in patients with painful DDWR. The use of NTI-tss could increase TMJ sounds. Although intraoral devices with additional counseling should be considered for the management of painful DDWR, dentists should be aware of the possible side effects of the intraoral device’s design. PMID:26200526

  8. Simultaneous bilateral spontaneous pneumothorax.

    PubMed

    Graf-Deuel, E; Knoblauch, A

    1994-04-01

    We describe 12 patients with simultaneous bilateral spontaneous pneumothorax (SBSP). They represent 4 percent of patients with spontaneous pneumothorax seen at our hospital from 1971 to 1990. Five of the 12 had no underlying lung disease. In the seven remaining patients, SBSP was secondary to histiocytosis X, lymphangioleiomyomatosis, osteogenic sarcoma with pleural and pulmonary metastases, Hodgkin's disease, mesothelioma, cystic fibrosis, or miliary tuberculosis. Nineteen of the 56 patients with SBSP (34 percent) described in the literature (this series included) had pulmonary disease related to disorders of cells of mesenchymal origin. Emphysema and bullous lung disease were not associated with SBSP. Long-term prognosis was a function of pulmonary status. Four of the patients described herein died during the period reviewed. All suffered from severe underlying disease. In no case was SBSP the main cause of death. With timely treatment, the short-term prognosis is benign even for patients with underlying lung disease. Surgical pleurectomy should be attempted early, especially in SBSP secondary to underlying lung disease. PMID:8162740

  9. Obliteration of Recurrent Large Dentigerous Cyst Using Bilateral Buccal Fat Pad Sling Flaps.

    PubMed

    Choi, Hwan Jun; Lee, Jun Beom

    2016-07-01

    Dentigerous cyst (DC), also known as follicular cyst, is an odontogenic cyst with fluid accumulation between the crown and enamel organ of an unerupted tooth, pushing the crown away from the alveolar bone. The patients with DC in the maxillary sinus should be evaluated thoroughly by extraoral and intraoral examinations, proper diagnostic imaging procedures, and pathologic examination to avoid misdiagnosis of maxillary sinusitis. The standard treatment for DC in the maxillary sinus is often removed by Caldwell-Luc approach. Furthermore, marsupialization or functional endoscopic sinus surgery may be performed because of the size, location of the cysts, or the age of the patients. Sometimes, DC recurred and it made contour deformity. The buccal fat pad (BFP) was mentioned for the first time by Heister in 1732 and better described by Bichat in 1802. Egyedi was the first to report use of the BFP in oral reconstruction for the closure of oroantral and oronasal communications, and Tideman et al showed there was no need to cover BFP by a skin graft when used for defects of oral cavity. So, the authors report our experience with the bilateral pedicled sling BFP flap for intraoral reconstruction after larger recurrent DC removal and describe advantages, operative procedure, and possible complications of the DC. PMID:27391514

  10. Acute silicosis with bilateral pneumothorax

    PubMed Central

    Srivastava, G N; Prasad, Rajniti; Meena, Manoj; Hussain, Moosa

    2014-01-01

    We present a case of acute silicosis with bilateral pneumothorax of a 28-year-old man working at a stone crusher factory for 1 year. He presented to the emergency department with cough, respiratory distress and diffuse chest pain. The patient was managed with bilateral intercostal tube drainage under water seal, oxygen inhalation and conservative therapy. On follow-up he showed improvement of resting dyspnoea and was doing well. This case is being reported because of the rare complications of acute silicosis as bilateral pneumothorax. PMID:24862410

  11. Acute silicosis with bilateral pneumothorax.

    PubMed

    Srivastava, G N; Prasad, Rajniti; Meena, Manoj; Hussain, Moosa

    2014-01-01

    We present a case of acute silicosis with bilateral pneumothorax of a 28-year-old man working at a stone crusher factory for 1 year. He presented to the emergency department with cough, respiratory distress and diffuse chest pain. The patient was managed with bilateral intercostal tube drainage under water seal, oxygen inhalation and conservative therapy. On follow-up he showed improvement of resting dyspnoea and was doing well. This case is being reported because of the rare complications of acute silicosis as bilateral pneumothorax. PMID:24862410

  12. Tobacco smoking and vertical periodontal bone loss.

    PubMed

    Baljoon, Mostafa

    2005-01-01

    Cigarette smoking is associated with increased prevalence and severity of destructive periodontal disease in terms of periodontal pocketing, periodontal bone loss, and tooth loss. The smoking destructive effect on periodontal bone may be of even "horizontal" and vertical "angular" pattern. The vertical bone loss or the "vertical defect" is a sign of progressive periodontal breakdown that involves the periodontal bone. Water pipe smoking has a sharp rise by the popularity in the recent years by men and women in Middle East countries. The general objective of this thesis was to investigate the relationship between tobacco smoking and vertical periodontal bone loss cross-sectionally and longitudinally. This thesis is based on two study populations, Swedish musicians and a Saudi Arabian population. All participants had a full set of intra-oral radiographs including 16 periapical and 4 bitewing projections that were assessed with regard to presence or absence of vertical defects. In Study I, the number of defects per person increased with age. Vertical defects were more common in the posterior as compared to the anterior region of the dentition and the distribution of defects within the maxilla as well as the mandible typically revealed a right-left hand side symmetry. Cigarette smoking was significantly associated with the prevalence and severity of vertical bone defects (Studies II and III). The relative risk associated with cigarette smoking was 2 to 3-fold increased. The impact of water pipe smoking was of the same magnitude as that of cigarette smoking and the relative risk associated with water pipe smoking was 6-fold increased compared to non-smoking. In addition, the risk of vertical defects increased with increased exposure in cigarette smokers as well as water pipe smokers (Study III). In Study IV, the proportion of vertical defects increased over a 10-year period and the increase over time was significantly associated with smoking. Moreover, the 10-year

  13. Bilateral internal laryngoceles mimicking asthma.

    PubMed

    Aksoy, Elif A; Elsürer, Cağdaş; Serin, Gediz M; Unal, O Faruk

    2013-05-01

    Laryngocele is an air-filled, abnormal dilation of the laryngeal saccule that extends upward within the false vocal fold, in communication with the laryngeal lumen. A case of 43-year-old male with bilateral internal laryngoceles, who has been treated as asthma for 4 years, is presented. The patient had dyspnea, cough, and excessive phlegm for a month and a late onset stridor. Flexible nasopharyngolaryngoscopy showed bilateral cystic enlargements of the false vocal folds and true vocal folds could not be visualized. Laryngeal CT without contrast enhancement showed bilateral internal laryngoceles. Submucosal total excision of bilateral cystic masses including parts of false vocal folds was performed. The symptoms resolved immediately after surgery. Although the incidence of internal laryngocele is rare, it should be remembered in the differential diagnosis of upper airway problems and diagnostic flexible nasopharnygolaryngoscopy is routinely indicated for airway evaluation in at-risk patients. PMID:24174956

  14. Isolated Bilateral Lacrimal Gland Agenesis.

    PubMed

    Al-Ryalat, Nosaiba T; Ezzat, Jumana W; Ababneh, Osama H; AlRyalat, Saif Aldeen S; Al-Hadidy, Azmy M

    2016-01-01

    A 5-year-old boy presented to the ophthalmology department complaining of absent tearing while crying. Slit-lamp examination showed decreased tear margin film with normal punctae. Orbit magnetic resonance imaging was done and showed bilateral absent lacrimal glands. This is the third case of isolated bilateral lacrimal gland agenesis in the literature. [J Pediatr Ophthalmol Strabismus. 2016;53:e35-e38.]. PMID:27486892

  15. Multiple bilateral submandibular gland sialolithiasis.

    PubMed

    Sunder, V S; Chakravarthy, C; Mikkilinine, R; Mahoorkar, S

    2014-01-01

    Sialolithiasis accounts for the most common etiology of salivary gland obstruction which leads to recurrent painful swelling of the involved gland which often exacerbates while eating. Stones may be encountered in any of the salivary glands but most frequently in the submandibular gland and its duct. Simultaneous sialolithiasis in more than one salivary gland is rare, occurring in fewer than 3% of cases. Seventy to 80% of cases feature solitary stones; only about 5% of patients have three or more stones, the case report which we are presenting here had three submandibular sialoliths involving both the submandibular glands which were removed by intraoral approach and no post-operative complications were noted. PMID:24326820

  16. Simultaneous Bilateral Ophthalmic Artery Chemosurgery for Bilateral Retinoblastoma (Tandem Therapy)

    PubMed Central

    Abramson, David H.; Marr, Brian P.; Francis, Jasmine H.; Dunkel, Ira J.; Fabius, Armida W. M.; Brodie, Scott E.; Mondesire-Crump, Ijah; Gobin, Y. Pierre

    2016-01-01

    Objective Report on the 7-year experience with bilateral ophthalmic artery chemosurgery (OAC-Tandem therapy) for bilateral retinoblastoma. Design Retrospective, single institution study. Subjects 120 eyes of 60 children with bilateral retinoblastoma treated since March 2008. Methods Retrospective review of all children treated at Memorial Sloan Kettering with bilateral ophthalmic artery chemosurgery (Melphalan, Carboplatin, Topotecan, Methotrexate) delivered in the same initial session to both naïve and previously treated eyes. Main Outcome Measures Ocular survival, metastatic disease, patient survival from metastases, second cancers, systemic adverse effects, need for transfusion of blood products, electroretinogram before and after treatment. Results 116 eyes were salvaged (4 eyes were enucleated: 3 because of progressive disease, 1 family choice). Kaplan Meier ocular survival was 99.2% at one year, 96.9% at 2 and 3 years and 94.9% for years 4 through 7. There were no cases of metastatic disease or metastatic deaths with a mean follow-up of 3.01 years. Two children developed second cancers (both pineoblastoma) and one of them died. Transfusion of blood products was required in 3 cases (4 transfusions), 1.9%. Two children developed fever/neutropenia requiring hospitalization (0.95%). ERGs were improved in 21.6% and unchanged after treatment in 52.5% of cases (increase or decrease of less than 25μV). Conclusions Bilateral ophthalmic artery chemosurgery is a safe and effective technique for managing bilateral retinoblastoma-even when eyes are advanced bilaterally, and if both eyes have progressed after systemic chemotherapy. Ocular survival was excellent (94.9% at 8 years), there were no cases of of metastatic disease and no deaths from metastatic disease, but children remain at risk for second cancers. In 21.6% of cases ERG function improved. Despite using chemotherapy in both eyes in the same session, systemic toxicity was low. PMID:27258771

  17. The use of intraoral ultrasound in the characterization of minor salivary gland malignancy: report of two cases.

    PubMed

    Sengupta, Anita; Brown, Jackie; Rudralingam, Meena

    2016-01-01

    It is generally accepted that ultrasound is now the first line of imaging of palpable lumps of the neck. Standardized protocols exist for the evaluation of thyroid, salivary gland and nodal disease, and sonography is increasingly being used in the characterization of intraoral soft tissue lesions. Here, we present two cases where intraoral sonography was invaluable in the early detection of oral malignancy. PMID:26954288

  18. Intraoral Digital Impressions for Virtual Occlusal Records: Section Quantity and Dimensions

    PubMed Central

    Solaberrieta, Eneko; Garmendia, Asier; Brizuela, Aritza; Otegi, Jose Ramon; Pradies, Guillermo; Szentpétery, Andras

    2016-01-01

    The purpose of this study was to locate the 3D spatial position mandibular cast and determine its occlusal contacts in a novel way by using an intraoral scanner as part of the virtual occlusal record procedure. This study also analyzes the requirements in quantity and dimensions of the intraoral virtual occlusal record. The results showed that the best section combination consists of 2 lateral and frontal sections, the width of this section being that of 2 teeth (24 mm × 15 mm). This study concluded that this procedure was accurate enough to locate the mandibular cast on a virtual articulator. However, at least 2 sections of the virtual occlusal records were necessary, and the best results were obtained when the distance between these sections was maximum. PMID:26881226

  19. Intraoral repair of all ceramic fixed partial denture utilizing preimpregnated fiber reinforced composite.

    PubMed

    Turkaslan, Süha; Tezvergil-Mutluay, Arzu

    2008-01-01

    All ceramic fixed partial dentures (FPD)s exhibit enhanced biocompatibility and esthetics as compared to metal-ceramic restorations. However, framework fractures are frequently reported especially when the connector dimensions are inadequate to withstand the high tensile stresses. The repair of the failed connector would be desirable rather than the complete removal and renewal since the latter is an expensive and time consuming procedure. Furthermore, the replacement or removal of the restoration for extra-oral repair purposes might increase the risk of destroying the entire restoration or damaging the abutment teeth during the removal. This article presents a direct intra-oral method that may be used to repair the connector fractures of all-ceramic FPDs which are otherwise clinically satisfactory. In the present technique, the connector is reconstructed intraorally utilizing composite resin restorative material reinforced with E-glass-fiber. PMID:19212511

  20. Intraoral Digital Impressions for Virtual Occlusal Records: Section Quantity and Dimensions.

    PubMed

    Solaberrieta, Eneko; Garmendia, Asier; Brizuela, Aritza; Otegi, Jose Ramon; Pradies, Guillermo; Szentpétery, Andras

    2016-01-01

    The purpose of this study was to locate the 3D spatial position mandibular cast and determine its occlusal contacts in a novel way by using an intraoral scanner as part of the virtual occlusal record procedure. This study also analyzes the requirements in quantity and dimensions of the intraoral virtual occlusal record. The results showed that the best section combination consists of 2 lateral and frontal sections, the width of this section being that of 2 teeth (24 mm × 15 mm). This study concluded that this procedure was accurate enough to locate the mandibular cast on a virtual articulator. However, at least 2 sections of the virtual occlusal records were necessary, and the best results were obtained when the distance between these sections was maximum. PMID:26881226

  1. Clinical evaluation of a prototype intraoral source x-ray system.

    PubMed

    Lieberman, J E; Webber, R L

    1978-08-01

    A prototype dental roentgenographic system which incorporates a tightly collimated intraoral x-ray source and an extraoral Polaroid film screen cassette was evaluated both in vitro and in vivo. Findings indicate that the detectability of artificially induced incipient enamel lesions was significantly less than that demonstrable for conventional roentgenograms produced with an extraoral source, long-cone geometry, and Kodak Ultra Speed D film. Larger lesions were found to be reliably detected by either technique. The new intraoral approach reduces the dose to the patient by possibly as much as 98 per cent and yields positive dry prints in 15 seconds. This system was clinically tested and found to be useful in endodontics and presurgical evaluation. Modifications are discussed which could reduce some of the technical problems and many of the shortcomings encountered. PMID:362311

  2. Intraoral pressures produced by thirteen semi-occluded vocal tract gestures

    PubMed Central

    MAXFIELD, LYNN; TITZE, INGO; HUNTER, ERIC; KAPSNER-SMITH, MARA

    2016-01-01

    The use of semi-occluded vocal tract (SOVT) exercises as habilitative and rehabilitative tools has grown substantially in the past two decades. As the use or these exercises has grown, so too has the number of variations of the phonatory gestures used to create oral semi-occlusions. While much of the research on SOVT exercises to this point has been conducted using straw phonation, there has been little discussion or investigation regarding how other phonatory gestures that are considered to be SOVT compare to one another. The current study sought to measure the intraoral pressure produced by 13 phonatory gestures generally thought of as oral semi-occlusions. Twenty subjects (10 male, 10 female) produced three tokens of each gesture, and intraoral pressure was recorded via a thin, flexible-cannula pressure transducer. Pressures ranged between 0.1 and 1.0 kPa, but varied significantly between gestures and between subjects. PMID:24865621

  3. Sens-A-Ray. A new system for direct digital intraoral radiography.

    PubMed

    Nelvig, P; Wing, K; Welander, U

    1992-12-01

    A new system for direct digital intraoral radiography, Sens-A-Ray, is presented. This system is based on a detector with a charge-coupled device that was designed especially for direct exposure to x-ray radiation. The system also includes interface electronics and an IBM AT-compatible personal computer with a digital I/O with frame memory, a super VGA graphics board, a high-resolution monitor, and software for the exposure, capture, storage, and enhancement of images. An external optical mass storage device is used for permanent storage of images in digital format. A video printer may be used to create hard copies. The system produces radiographic images at a significantly lower exposure than required for E-speed intraoral film. Applications of the system are exemplified, and its basic properties are discussed. PMID:1488241

  4. Intravascular fasciitis: report of two intraoral cases and review of the literature.

    PubMed

    Kuklani, Riya; Robbins, James L; Chalk, Evan C; Pringle, Gordon

    2016-01-01

    Two unusual cases of intravascular fasciitis arising in a 25-year-old female and a 26-year-old male are presented here. The lesions apparently presented as firm, raised, submucosal nodules on the tongue. Intravascular fasciitis (IVF) shares the microscopic features of nodular fasciitis (NF), but with intraluminal, intramural, and extramural involvement of small- to medium-sized veins and arteries with a multinodular or serpentine growth pattern along the course of affected blood vessels. NF is a benign lesion occurring on the trunk and upper extremities with a strong predilection for young adults 20 to 40 years of age. Intraoral NF is uncommon, and intraoral IVF is extremely rare, with only sporadic reports in the literature. In both of our cases, the patient's main concern was rapid growth of the lesion, which was nontender, on the tongue. The clinical, histologic, and immunohistochemical features and treatment are presented, along with a review of the literature. PMID:26163438

  5. CMOS digital intra-oral sensor for x-ray radiography

    NASA Astrophysics Data System (ADS)

    Liu, Xinqiao; Byczko, Andrew; Choi, Marcus; Chung, Lap; Do, Hung; Fowler, Boyd; Ispasoiu, Radu; Joshi, Kumar; Miller, Todd; Nagy, Alex; Reaves, David; Rodricks, Brian; Teeter, Doug; Wang, George; Xiao, Feng

    2011-03-01

    In this paper, we present a CMOS digital intra-oral sensor for x-ray radiography. The sensor system consists of a custom CMOS imager, custom scintillator/fiber optics plate, camera timing and digital control electronics, and direct USB communication. The CMOS imager contains 1700 x 1346 pixels. The pixel size is 19.5um x 19.5um. The imager was fabricated with a 0.18um CMOS imaging process. The sensor and CMOS imager design features chamfered corners for patient comfort. All camera functions were integrated within the sensor housing and a standard USB cable was used to directly connect the intra-oral sensor to the host computer. The sensor demonstrated wide dynamic range from 5uGy to 1300uGy and high image quality with a SNR of greater than 160 at 400uGy dose. The sensor has a spatial resolution more than 20 lp/mm.

  6. A case of homicidal intraoral gunshot and review of the literature.

    PubMed

    Berens, Sandra; Ketterer, Thomas; Kneubuehl, Beat P; Thali, Michael J; Ross, Steffen; Bolliger, Stephan A

    2011-06-01

    Determination of the manner of death in case of intraoral firearm wounds can be a challenge, especially if the circumstances of the incident are unclear and crime scene investigation is inadequate. It is a well-known fact that the mouth is one of the selected sites for suicide with firearms. Homicidal shooting through the mouth is said to be rare, but does occur, and can be mistaken for a suicide. For discrimination between suicide and homicide in cases of intraoral firearm wounds, some useful points are the site of entry wound, the direction of the internal bullet path, the range of fire and the circumstances of death. We demonstrate these points in a case of a homicidal gunshot to the mouth assessed by both classical autopsy and post-mortem CT (PMCT). PMID:21076946

  7. Microscopic and immunohistochemical analysis of the skin changes of free forearm flaps in intraoral reconstruction.

    PubMed

    Rubino, Corrado; Dessy, Luca A; Farace, Francesco; Ena, Pasquale; Mazzarello, Vittorio

    2002-10-01

    In the literature, few studies based on clinical and histological evaluation analyze skin structural changes after transplantation to the oral cavity. Ten patients affected by squamous cell carcinoma of the oral cavity who were reconstructed with a free forearm flap were included in the current study to analyze skin alterations. The authors performed a histological and ultrastructural evaluation of skin samples from the free forearm flap before transplantation and 18 months after intraoral reconstruction. They analyzed cytokeratin and involucrin distribution, which represent markers of maturation and differentiation of epithelia. The aim of this study was to demonstrate whether skin "mucosalization" occurs. They found that the skin undergoes some morphological changes induced by the intraoral environment. Cytokeratin and involucrin distribution is mostly unchanged. This aspect is in favor of skin structure preservation. Thus, they found that "mucosalization" of the skin is not evident after 18 months. PMID:12370640

  8. An exaggerated response of intra-oral pyogenic granuloma during puberty.

    PubMed

    Papageorge, M B; Doku, H C

    1992-01-01

    Intra-oral pyogenic granulomas have been associated with pregnancy. The exaggerated response of these tumors has been related to the hormonal changes occurring during this period. A change in the hormonal balance also occurs during puberty. In this paper, we present two young patients with large pyogenic granulomas and suggest that the hormonal changes play a primary role in the pathogenesis of this tumor. PMID:1525077

  9. Archwire cleaning after intraoral ageing: the effects on debris, roughness, and friction.

    PubMed

    Normando, David; de Araújo, Adriana Monteiro; Marques, Isabella da Silva Vieira; Barroso Tavares Dias, Carmen Gilda; Miguel, José Augusto Mendes

    2013-04-01

    Dental material science has paid more attention to mechanical properties of as-received materials than to changes produced after intraoral exposure. Orthodontic archwires when exposed to the intraoral environment have shown a significant increase in the degree of debris, surface roughness (Ra), and frictional force. The purpose of this split-mouth study was to evaluate the effects of two methods of archwire cleaning on these variables after clinical use for 8 weeks. For eight individuals, four sets of three brackets each (n = 32) were bonded from the first molar to the first premolar. A passive segment of 0.019 × 0.025 inch stainless steel (SS) archwire was inserted into the brackets and tied by elastomeric ligature. Debris level [via scanning electron microscopy (SEM)], Ra, and frictional force were evaluated in a paired comparison after 8 weeks of intraoral exposure and after cleaning with a steel wool sponge (SWS) for 1 minute or ultrasound (US) cleaning for 15 minutes. Kruskal-Wallis, Friedman's, and Spearman and Pearson correlation tests were used for statistical analysis. The debris and Ra of SS rectangular wires increased significantly (P < 0.05) during clinical use, causing a significant increase in the frictional force level. These changes can be effectively eliminated by either of the investigated cleaning methods, although a SWS seems to be clinically more practical. PMID:22015824

  10. Use of the Integra skin regeneration system in an intraoral mandibular defect in osteoradionecrosis.

    PubMed

    Beech, A; Farrier, J

    2016-09-01

    The objective was to trial the use of the Integra skin regeneration system intraorally to promote healing of an intraoral defect in osteoradionecrosis (ORN), thereby avoiding the necessity for mucosal flaps, free flaps, or skin grafts. A 54-year-old male patient presented with a pathological mandibular fracture at the angle, related to previous radiotherapy for tonsillar carcinoma, after the development of ORN. The fracture site was debrided and fixed with a reconstruction plate and the intraoral defect was dressed with the Integra two-layer system and an overlying pack. Three weeks later, the pack and silicone layer of the regeneration system were removed, showing early granulation over the previously exposed bone. At 8 weeks postoperative, the defect had healed completely with no need for further reconstruction. Using the method described, excellent healing was seen with the Integra skin regeneration system. A new use for the Integra skin regeneration system has been identified in the authors' unit. This method is minimally invasive and resulted in good healing in the case presented. The need for further reconstruction with associated increased patient morbidity was avoided in this case. PMID:27068447

  11. Endoscope-assisted conservative condylectomy in the treatment of condylar osteochondroma through an intraoral approach.

    PubMed

    Yu, H B; Sun, H; Li, B; Zhao, Z L; Zhang, L; Shen, S G; Wang, X D

    2013-12-01

    Mandibular condylar osteochondroma (OC) can result in morphological and functional disturbances, including facial asymmetry and temporomandibular joint (TMJ) dysfunction. The aim of this study was to explore the feasibility of endoscope-assisted tumour resection and conservative condylectomy via an intraoral approach. Seven patients with condylar OC were enrolled in this study. Endoscope-assisted tumour resection and conservative condylectomy were achieved intraorally, and no conventional extraoral incision was needed. Direct vision of the magnified and illuminated operative field was realized with the assistance of an endoscope. No facial nerve injury or salivary fistula occurred in any patient. Stable occlusion was realized through postoperative orthodontic treatment. The patients showed no signs of tumour recurrence or TMJ ankylosis during follow-up (range 18-43 months). Endoscope-assisted condylar OC resection and conservative condylectomy via intraoral approach offers great advantages with no significant complications compared with conventional extraoral incisions. The endoscope provides us with a valuable treatment option for this potentially complicated procedure. PMID:23790807

  12. Intra-oral adsorption and release of aroma compounds following in-mouth wine exposure.

    PubMed

    Esteban-Fernández, Adelaida; Rocha-Alcubilla, Nuria; Muñoz-González, Carolina; Moreno-Arribas, María Victoria; Pozo-Bayón, María Ángeles

    2016-08-15

    Wine "after-odour" defined as the long lasting aroma perception that remains after wine swallowing is an outstanding characteristic in terms of wine quality but a relatively unstudied phenomenon. Among the different parameters that might affect wine after-odour, the adsorption of odorants by the oral mucosa could be important but has been little explored. In this work, the impact of the chemical characteristics of aroma compounds on intra-oral adsorption was assessed by an in vivo approach that determined the amounts of odorants remaining in expectorated wine samples. In addition, the subsequent aroma release after in-mouth wine exposure was studied by means of intra-oral SPME/GC-MS using three different panellists. Oral adsorption of the aroma compounds added to the wines ranged from 6% to 43%, depending on their physicochemical characteristics. A progressive intra-oral aroma decrease at different decay rates depending on compound type and panellist was also found. The strength of the aroma-oral mucosa interactions seems to explain these results more than the amount of compound adsorbed by the oral mucosa. PMID:27006241

  13. An analysis of the physiologic parameters of intraoral wear: a review

    NASA Astrophysics Data System (ADS)

    Lawson, Nathaniel C.; Janyavula, Sridhar; Cakir, Deniz; Burgess, John O.

    2013-10-01

    This paper reviews the conditions of in vivo mastication and describes a novel method of measuring in vitro wear. Methods: parameters of intraoral wear are reviewed in this analysis, including chewing force, tooth sliding distance, food abrasivity, saliva lubrication, and antagonist properties. Results: clinical measurement of mastication forces indicates a range of normal forces between 20 and 140 N for a single molar. During the sliding phase of mastication, horizontal movement has been measured between 0.9 and 2.86 mm. In vivo wear occurs by three-body abrasion when food particles are interposed between teeth and by two-body abrasion after food clearance. Analysis of food particles used in wear testing reveals that food particles are softer than enamel and large enough to separate enamel and restoration surfaces and act as a solid lubricant. In two-body wear, saliva acts as a boundary lubricant with a viscosity of 3 cP. Enamel is the most relevant antagonist material for wear testing. The shape of a palatal cusp has been estimated as a 0.6 mm diameter ball and the hardest region of a tooth is its enamel surface. pH values and temperatures have been shown to range between 2-7 and 5-55 °C in intraoral fluids, respectively. These intraoral parameters have been used to modify the Alabama wear testing method.

  14. Use of an Intraoral Laser Scanner During the Prosthetic Phase of Implant Dentistry: A Pilot Study.

    PubMed

    Lee, Cameron Y S; Wong, Natalie; Ganz, Scott D; Mursic, Jonathan; Suzuki, Jon B

    2015-08-01

    The accuracy of a digital impression technique to fabricate the implant restoration and abutment for a dental implant using an intraoral laser scanner was evaluated in 36 patients who were missing a single posterior tooth in either the mandible or maxilla that was restored with a single implant. The spatial position of each integrated implant, including the surrounding anatomic hard and soft tissues of adjacent structures, was captured utilizing a special scanning abutment with an intraoral laser scanner. Data from the scanning protocol was then delivered via the Internet in the form of an STL file to the manufacturing site for the production of a custom computer-aided design abutment and crown. All 36 restorations and abutments were delivered to the patients and evaluated for marginal integrity, interproximal contact points, and occlusion. Of the 36 patients, 6 required contact adjustments, 7 required occlusal adjustments, and 3 required a gingivectomy around the implant to completely seat the restoration. Chair time for adjustments did not exceed 15 minutes. The findings suggest that an intraoral laser scanner can be used with confidence to obtain consistent and accurate digital impressions to fabricate custom restorations and abutments for dental implants. PMID:24967654

  15. A portable intra-oral scanner based on sinusoidal pattern of fast phase-shifting

    NASA Astrophysics Data System (ADS)

    Jan, Chia-Ming; Lin, Ying-Chieh

    2016-03-01

    This paper presented our current research about the intra-oral scanner made by MIRDC. Utilizing the sinusoidal pattern for fast phase-shifting technique to deal with 3D digitalization of human dental surface profile, the development of pseudo-phase shifting digital projection can easily achieve one type of full-field scanning instead of the common technique of the laser line scanning. Based on traditional Moiré method, we adopt projecting fringes and retrieve phase reconstruction to forward phase unwrapping. The phase difference between the plane and object can be exactly calculated from the desired fringe images, and the surface profile of object was probably reconstructed by using the phase differences information directly. According to our algorithm of space mapping between projections and capturing orientation exchange of our intra-oral scanning configuration, the system we made certainly can be proved to achieve the required accuracy of +/-10μm to deal with intra-oral scanning on the basis of utilizing active triangulation method. The final purpose aimed to the scanning of object surface profile with its size about 10x10x10mm3.

  16. Intraoral corrosion of self-ligating metallic brackets and archwires and the effect on friction

    NASA Astrophysics Data System (ADS)

    Tima, Lori Lynn

    The purpose of this study was to investigate how the frictional coefficient was affected due to intraoral use. A secondary aim of this study was to determine whether or not there was a relationship between corrosion of orthodontic alloys and friction via scanning electron microscopic qualitative analysis. Orthodontic brackets and 0.019 x 0.025 inch stainless steel archwires were collected and divided into three groups of n=10: used bracket and used wires (UBUW), used brackets and new wires (UBNW), and new brackets and new wires (NBNW). New materials were as-received from the manufacturer, and used materials were clinically used bracket and wires collected from patients following orthodontic treatment. Archwires were pulled through bracket slots at a rate of 0.5mm/min while friction forces were measured. Following a cleaning process, the surface topography of the bracket slots was examined under a scanning electron microscope (SEM). Based on a 1-factor MANOVA, there was no significant group effect (all p>0.05) on frictional forces. Partial eta squared values indicated that intraoral exposure had only a small effect on frictional forces (≤ 3%). Qualitative analysis of SEM images did not show an association between surface characteristics of the bracket slots and magnitude of frictional force. Results suggest that surface corrosion from intraoral use does not significantly affect friction at the bracket wire interface.

  17. Effects of short-term training on behavioral learning and skill acquisition during intraoral fine motor task.

    PubMed

    Kumar, A; Grigoriadis, J; Trulsson, M; Svensson, P; Svensson, K G

    2015-10-15

    Sensory information from the orofacial mechanoreceptors are used by the nervous system to optimize the positioning of food, determine the force levels, and force vectors involved in biting of food morsels. Moreover, practice resulting from repetition could be a key to learning and acquiring a motor skill. Hence, the aim of the experiment was to test the hypothesis that repeated splitting of a food morsel during a short-term training with an oral fine motor task would result in increased performance and optimization of jaw movements, in terms of reduction in duration of various phases of the jaw movements. Thirty healthy volunteers were asked to intraorally manipulate and split a chocolate candy, into two equal halves. The participants performed three series (with 10 trials) of the task before and after a short-term (approximately 30 min) training. The accuracy of the split and vertical jaw movement during the task were recorded. The precision of task performance improved significantly after training (22% mean deviation from ideal split after vs. 31% before; P<0.001). There was a significant decrease in the total duration of jaw movements during the task after the training (1.21 s total duration after vs. 1.56 s before; P<0.001). Further, when the jaw movements were divided into different phases, the jaw opening phase and contact phase were significantly shorter after training than before training (P=0.001, P=0.002). The results indicate that short-term training of an oral fine motor task induces behavior learning, skill acquisition and optimization of jaw movements in terms of better performance and reduction in the duration of jaw movements, during the task. The finding of the present study provides insights into how humans learn oral motor behaviors or the kind of adaptation that takes place after a successful prosthetic rehabilitation. PMID:26162238

  18. Bilateral carotid and bilateral vertebral artery dissection following facial massage.

    PubMed

    Chakrapani, Andrea L; Zink, Walter; Zimmerman, Robert; Riina, Howard; Benitez, Ronald

    A 50-year-old woman underwent facial massage. After 13 days, she experienced left retro-orbital pain, ptosis, and miosis. Magnetic resonance imaging (MRI) showed stenotic dissection of bilateral cervical internal carotid and vertebral arteries. The intracranial vasculature was intact. She was treated conservatively with long-term oral anticoagulation and remains asymptomatic 18 months later. PMID:18388028

  19. Accuracy of intraoral data acquisition in comparison to the conventional impression.

    PubMed

    Luthardt, R G; Loos, R; Quaas, S

    2005-10-01

    The achievable accuracy is a decisive parameter for the comparison of direct intraoral digitization with the conventional impression. The objective of the study was therefore to compare the accuracy of the reproduction of a model situation by intraoral digitization vs. the conventional procedure consisting of impression taking, model production, and extraoral digitization. Proceeding from a die model with a prepared tooth 16, the reference data set of the teeth 15, 16 and 17 was produced with an established procedure by means ofextraoral digitization. For the simulated intraoral data acquisition of the master model (Cerec 3D camera, Sirona, Bensheim), the camera was fastened on a stand for the measurement and the teeth digitized seven times each in defined views (occlusal, and in each case inclined by 20 degrees, from the mesio-proximal, disto-proximal, vestibular and oral aspect). Matching was automated (comparative data sets B1-B5). A clinically perfect one-step putty-and-wash impression was taken from the starting model. The model produced under defined conditions was digitized extraorally five times (digi-SCAN, comparative data sets C1-C5). The data sets B1-B5 and C1-C5 were assigned to the reference data set by means of best-fit matching and the root of the mean quadratic deviation (RMS; root mean square) calculated. The deviations were visualized, and mean positive, negative and absolute deviations calculated. The mean RMS was 27.9 microm (B1-B5) or 18.8 microm (C1-C5). The mean deviations for the prepared tooth were 18 microm/-17 microm (B1-B5) and 9 microm /-9 microm (C1-C5). For tooth 15, the mean deviations were 22 microm/-19 microm (B1-B5) and 15 microm/-16 microm (C1-C5). The intraoral method showed good results with deviations from the CAD starting model of approx. 17 microm, related to the prepared tooth 16. On the whole, in this in-vitro study, extraoral digitization with impression taking and model production showed higher accuracy than intraoral

  20. X-ray digital intra-oral tomosynthesis for quasi-three-dimensional imaging: system, reconstruction algorithm, and experiments

    NASA Astrophysics Data System (ADS)

    Li, Liang; Chen, Zhiqiang; Zhao, Ziran; Wu, Dufan

    2013-01-01

    At present, there are mainly three x-ray imaging modalities for dental clinical diagnosis: radiography, panorama and computed tomography (CT). We develop a new x-ray digital intra-oral tomosynthesis (IDT) system for quasi-three-dimensional dental imaging which can be seen as an intermediate modality between traditional radiography and CT. In addition to normal x-ray tube and digital sensor used in intra-oral radiography, IDT has a specially designed mechanical device to complete the tomosynthesis data acquisition. During the scanning, the measurement geometry is such that the sensor is stationary inside the patient's mouth and the x-ray tube moves along an arc trajectory with respect to the intra-oral sensor. Therefore, the projection geometry can be obtained without any other reference objects, which makes it be easily accepted in clinical applications. We also present a compressed sensing-based iterative reconstruction algorithm for this kind of intra-oral tomosynthesis. Finally, simulation and experiment were both carried out to evaluate this intra-oral imaging modality and algorithm. The results show that IDT has its potentiality to become a new tool for dental clinical diagnosis.

  1. Unconditioned oromotor taste reactivity elicited by sucrose and quinine is unaffected by extensive bilateral damage to the gustatory zone of the insular cortex in rats.

    PubMed

    King, Camille Tessitore; Hashimoto, Koji; Blonde, Ginger D; Spector, Alan C

    2015-03-01

    Rats display stereotypical oromotor and somatic responses to small volumes of intraorally infused taste solutions. These behaviors, known as taste reactivity, are categorized by their association with ingestion or rejection and are thought to reflect the palatability of the stimulus. Because supracollicular decerebrate rats display normal taste reactivity responses, it would appear that forebrain structures are not necessary for generating them. However, because moving the plane of transection rostrally, or damaging or manipulating specific ventral forebrain sites disrupts normal taste reactivity behavior, lesions of the gustatory cortex, a region that has been suggested to be involved with palatability processing, may do the same. In the current study, rats received two injections of either ibotenic acid (N=12) or vehicle (N=8), targeting the conventionally defined gustatory cortex in each hemisphere, and were implanted with intraoral cannulae. Following recovery, their responses to intraoral infusions (0.23ml in 1min) of dH2O, sucrose (1.0M and 0.1M), and quinine hydrochloride (3mM and 0.3mM) were video recorded. Analysis of brains with sufficient bilateral lesions (N=10) revealed that, on average, approximately 94% of the gustatory cortex was destroyed. These extensive bilateral lesions had no significant effect on taste reactivity; the numbers of ingestive and aversive responses to sucrose and quinine were similar between groups. Though these findings do not rule out involvement of the gustatory cortex in palatability processing, they make evident that the region of insular cortex destroyed is not necessary for the normal expression of unconditioned affective behavioral responses to taste stimuli. PMID:25536305

  2. Assessing the Effectiveness of Massage Therapy for Bilateral Cleft Lip Reconstruction Scars

    PubMed Central

    McKay, Emilie

    2014-01-01

    Background and Objective Bilateral cleft lips occur when the bones that form the upper lip fail to fuse at birth. Surgical reconstruction creates scars, which may lead to the following impairments: adhesions, decreased oral range of motion, decreased strength of orbicularis oris muscle, and asymmetry of oral region leading to poor self-esteem. The purpose of this case study is to determine the effectiveness of massage therapy in its ability to improve these impairments. Methods A five-week treatment plan consisting of fascial release, kneading, and intraoral techniques. Subjective information was assessed on two scales: restriction of scar and clients attitudes and acceptance of scar. Objective information was cataloged through photographs, a palpatory chart, and a self-created “Pen Test”. Results Results included increase range of motion and strength, decrease restrictions (palpable and subjective), and increase of symmetry. Client’s perceived confidence of scar and its appearance increased. Conclusions The evidence suggests that massage therapy helped with the impairments associated with scars formed by bilateral cleft lip reconstruction. PMID:24920967

  3. Bilateral mandibular osteomyelitis mimicking periapical cysts in a patient with sickle cell anemia.

    PubMed

    Araújo, Juliane Pirágine; Cadavid, Ana Maria Hoyos; Lemos, Celso Augusto; Trierveiler, Marilia; Alves, Fabio Abreu

    2015-01-01

    Sickle cell anemia (SCA) is a hemoglobin disorder that occurs more commonly among Afro-descendants. The authors report the case of a 28-year-old Afro-descendent male patient with the diagnosis of homozygotic sickle cell disease (SCD) referred for evaluation of mandibular lesions. The patient's main complaints included pain and bilateral teeth mobility. An intraoral examination revealed gingiva recession affecting the lower molars with extensive root exposure. A panoramic x-ray showed two radiolucent symmetrical periapical lesions evolving both the first and the second lower molars, bilaterally. The diagnostic hypotheses comprised odontogenic infection, among others. Besides antimicrobial therapy, the two molars of both sides were extracted and bone was collected for histopathological and microbiological analyses. Osteomyelitis was diagnosed, and Streptococcus viridans was recovered from the culture media. Mandibular osteomyelitis should be considered as a diagnosis in patients with SCD. The present case offers an alert to clinicians about the importance of knowing jaw lesions related to SCA. PMID:26558249

  4. Bilateral mandibular osteomyelitis mimicking periapical cysts in a patient with sickle cell anemia

    PubMed Central

    Araújo, Juliane Pirágine; Cadavid, Ana Maria Hoyos; Lemos, Celso Augusto; Trierveiler, Marilia

    2015-01-01

    Sickle cell anemia (SCA) is a hemoglobin disorder that occurs more commonly among Afro-descendants. The authors report the case of a 28-year-old Afro-descendent male patient with the diagnosis of homozygotic sickle cell disease (SCD) referred for evaluation of mandibular lesions. The patient’s main complaints included pain and bilateral teeth mobility. An intraoral examination revealed gingiva recession affecting the lower molars with extensive root exposure. A panoramic x-ray showed two radiolucent symmetrical periapical lesions evolving both the first and the second lower molars, bilaterally. The diagnostic hypotheses comprised odontogenic infection, among others. Besides antimicrobial therapy, the two molars of both sides were extracted and bone was collected for histopathological and microbiological analyses. Osteomyelitis was diagnosed, and Streptococcus viridans was recovered from the culture media. Mandibular osteomyelitis should be considered as a diagnosis in patients with SCD. The present case offers an alert to clinicians about the importance of knowing jaw lesions related to SCA. PMID:26558249

  5. Note: Unshielded bilateral magnetoencephalography system using two-dimensional gradiometers

    NASA Astrophysics Data System (ADS)

    Seki, Yusuke; Kandori, Akihiko; Ogata, Kuniomi; Miyashita, Tsuyoshi; Kumagai, Yukio; Ohnuma, Mitsuru; Konaka, Kuni; Naritomi, Hiroaki

    2010-09-01

    Magnetoencephalography (MEG) noninvasively measures neuronal activity with high temporal resolution. The aim of this study was to develop a new type of MEG system that can measure bilateral MEG waveforms without a magnetically shielded room, which is an obstacle to reducing both the cost and size of an MEG system. An unshielded bilateral MEG system was developed using four two-dimensional (2D) gradiometers and two symmetric cryostats. The 2D gradiometer, which is based on a low-Tc superconducting quantum interference device and wire-wound pickup coil detects a magnetic-field gradient in two orthogonal directions, or ∂/∂x(∂2Bz/∂z2), and reduces environmental magnetic-field noise by more than 50 dB. The cryostats can be symmetrically positioned in three directions: vertical, horizontal, and rotational. This makes it possible to detect bilateral neuronal activity in the cerebral cortex simultaneously. Bilateral auditory-evoked fields (AEF) of 18 elderly subjects were measured in an unshielded hospital environment using the MEG system. As a result, both the ipsilateral and the contralateral AEF component N100m, which is the magnetic counterpart of electric N100 in electroencephalography and appears about 100 ms after the onset of an auditory stimulus, were successfully detected for all the subjects. Moreover, the ipsilateral P50m and the contralateral P50m were also detected for 12 (67%) and 16 (89%) subjects, respectively. Experimental results demonstrate that the unshielded bilateral MEG system can detect MEG waveforms, which are associated with brain dysfunction such as epilepsy, Alzheimer's disease, and Down syndrome.

  6. Evaluation of intraoral complications of buccal mucosa graft in augmentation urethroplasty

    PubMed Central

    Akyüz, Mehmet; Güneş, Mustafa; Koca, Orhan; Sertkaya, Zülfü; Kanberoğlu, Hüseyin; Karaman, Muhammet İhsan

    2014-01-01

    Objective: To evaluate intraoral complications of buccal mucosa grafts harvested from one cheek, and used in augmentation urethroplasty. Material and methods: Twenty-one patients with anterior urethral strictures were included in our study. In twelve patients, dorsal onlay, in five patients ventral onlay and in four patients lateral onlay procedures were applied. Average length of buccal mucosa graft from one cheek was 5.2 cm (3–8 cm). In all graft harvesting patients, bleeding in graft side, swelling, pain intensity of oral or perineal area, analgesic use, transition time to normal diet, slurred speech, loss of sensation, and patients’ opinions about oral mucosa regrafting using this technique were evaluated using nine-item questionnaire forms. Results: Eighteen (85.7%) of our patients had mild pain, 13 (61.9%) had mild intraoral swelling, none of our patients had oral bleeding that needed extra procedure and all of our patients were observed to start off their normal diet in the first 3 days. Twelve (57.1%) of our patients needed analgesic agents after the operation while 14 (66.7%) of them have remarked that perineal incision was more painful. Twenty (95.3%) of our patients stated that they could go under the same procedure again. None of our patients had speech disorders or intraoral numbness. Conclusion: Even though buccal mucosal grafting used in augmentation urethroplasty is not a completely painless procedure, buccal mucosa graft is an ideal source of allograft in terms of safe and easy obtainance and improved patient tolerance. PMID:26328170

  7. Application of Intra-Oral Dental Scanners in the Digital Workflow of Implantology

    PubMed Central

    van der Meer, Wicher J.; Andriessen, Frank S.; Wismeijer, Daniel; Ren, Yijin

    2012-01-01

    Intra-oral scanners will play a central role in digital dentistry in the near future. In this study the accuracy of three intra-oral scanners was compared. Materials and methods: A master model made of stone was fitted with three high precision manufactured PEEK cylinders and scanned with three intra-oral scanners: the CEREC (Sirona), the iTero (Cadent) and the Lava COS (3M). In software the digital files were imported and the distance between the centres of the cylinders and the angulation between the cylinders was assessed. These values were compared to the measurements made on a high accuracy 3D scan of the master model. Results: The distance errors were the smallest and most consistent for the Lava COS. The distance errors for the Cerec were the largest and least consistent. All the angulation errors were small. Conclusions: The Lava COS in combination with a high accuracy scanning protocol resulted in the smallest and most consistent errors of all three scanners tested when considering mean distance errors in full arch impressions both in absolute values and in consistency for both measured distances. For the mean angulation errors, the Lava COS had the smallest errors between cylinders 1–2 and the largest errors between cylinders 1–3, although the absolute difference with the smallest mean value (iTero) was very small (0,0529°). An expected increase in distance and/or angular errors over the length of the arch due to an accumulation of registration errors of the patched 3D surfaces could be observed in this study design, but the effects were statistically not significant. Clinical relevance For making impressions of implant cases for digital workflows, the most accurate scanner with the scanning protocol that will ensure the most accurate digital impression should be used. In our study model that was the Lava COS with the high accuracy scanning protocol. PMID:22937030

  8. Ex vivo comparison of Galileos cone beam CT and intraoral radiographs in detecting occlusal caries

    PubMed Central

    Rathore, S; Tyndall, D; Wright, JT; Everett, E

    2012-01-01

    Objective The aim of this study was to compare the accuracy of cone beam CT (CBCT) with intraoral radiographs for detection of occlusal caries. Methods A set of 60 extracted teeth were imaged using a Sirona Galileos CBCT system (Sirona Dental Systems, Bensheim, Germany) and an intraoral Planmeca® system (Planmeca OY, Helsinki, Finland). Six observers looked at both modalities and used a five-point confidence scale to evaluate presence or absence of occlusal caries. Histology was used as the gold standard. Receiver operating characteristic analysis and weighted kappa statistics were used for statistical analysis. Differences in the area under the curve (AUC) values between observers and modalities were analysed using analysis of variance (ANOVA). Differences in sensitivity and specificity were analysed using the Wilcoxon test. Interobserver and intraobserver reliability was assessed by weighted kappa scores. Results The mean value and standard deviation of AUC was 0.719 ± 0.038 for CBCT and 0.649 ± 0.062 for the intraoral radiographs. The ANOVA results demonstrated that there was no significant difference between the modalities and the observers. The interobserver kappa for pairs of observers ranged from fair to substantial for bitewings (0.244–0.543) and CBCT (0.152–0.401). Four out of six observers reported higher sensitivity but lower specificity with CBCT. The Wilcoxon exact p-value showed no difference in sensitivity (0.175) or specificity (0.573) between the two modalities. Conclusion Based on the results we conclude that the Sirona CBCT unit cannot be used for the sole purpose of looking at occlusal caries. PMID:22184471

  9. Comparison of intraoral scanning and conventional impression techniques using 3-dimensional superimposition

    PubMed Central

    Rhee, Ye-Kyu

    2015-01-01

    PURPOSE The aim of this study is to evaluate the appropriate impression technique by analyzing the superimposition of 3D digital model for evaluating accuracy of conventional impression technique and digital impression. MATERIALS AND METHODS Twenty-four patients who had no periodontitis or temporomandibular joint disease were selected for analysis. As a reference model, digital impressions with a digital impression system were performed. As a test models, for conventional impression dual-arch and full-arch, impression techniques utilizing addition type polyvinylsiloxane for fabrication of cast were applied. 3D laser scanner is used for scanning the cast. Each 3 pairs for 25 STL datasets were imported into the inspection software. The three-dimensional differences were illustrated in a color-coded map. For three-dimensional quantitative analysis, 4 specified contact locations(buccal and lingual cusps of second premolar and molar) were established. For twodimensional quantitative analysis, the sectioning from buccal cusp to lingual cusp of second premolar and molar were acquired depending on the tooth axis. RESULTS In color-coded map, the biggest difference between intraoral scanning and dual-arch impression was seen (P<.05). In three-dimensional analysis, the biggest difference was seen between intraoral scanning and dual-arch impression and the smallest difference was seen between dual-arch and full-arch impression. CONCLUSION The two- and three-dimensional deviations between intraoral scanner and dual-arch impression was bigger than full-arch and dual-arch impression (P<.05). The second premolar showed significantly bigger three-dimensional deviations than the second molar in the three-dimensional deviations (P>.05). PMID:26816576

  10. Intraoral evaluation of mineralization of cosmetic defects by a toothpaste containing calcium, fluoride, and sodium bicarbonate.

    PubMed

    Litkowski, Leonard J; Quinlan, Kathleen B; Ross, David R; Ghassemi, Annahita; Winston, Anthony; Charig, Andrew; Flickinger, Mark; Vorwerk, Linda

    2004-09-01

    New dual-phase fluoride toothpastes that contain soluble calcium, phosphate, and baking soda have recently been introduced into the market. These toothpastes are designed to fill in small surface defects in tooth enamel and thereby enhance tooth esthetics such as gloss. This two-part study was designed to assess these superficial mineralizing effects from using one of these products compared with an experimental calcium-containing, bicarbonate-free formulation and a conventional fluoride toothpaste using an intraoral model. Enamel specimens with 4 types of defects were mounted into an intraoral appliance and placed in the mouths of volunteers for 1 month. The four types of defects were whitening toothpaste abrasion, coarse abrasion, natural dimpling, and acid etching. Before and after intraoral exposure, scanning electron microscope photographs of the specimens were made. The surface microhardness of the acid-etched specimens also was determined. The volunteers brushed their specimens twice daily with one of three randomly assigned toothpastes. The toothpastes were a two-phase, calcium-containing, bicarbonate-based toothpaste; an experimental, two-phase, calcium-containing, bicarbonate-free toothpaste; and a conventional toothpaste. Only the calcium-containing toothpastes showed unequivocal signs of mineral deposition into surface defects, leading to smoothing of the enamel. All three products significantly increased the hardness of the etched enamel, presumably because of fluoride. However, only the two calcium-containing toothpastes gave significantly greater hardness increases than the conventional toothpaste; the specimens treated with a conventional toothpaste were indistinguishable from those treated with saliva. PMID:15645904

  11. Bilateral diabetic thigh muscle infarction.

    PubMed

    Barohn, R J; Bazan, C; Timmons, J H; Tegeler, C

    1994-01-01

    A 19-year-old woman with insulin-dependent diabetes mellitus developed pain and tenderness in the medial aspect of the left thigh and calf, followed 1 week later by similar symptoms in the right leg. Technetium 99m pyrophosphate (PYP) radionuclide scans showed increased flow and uptake in the medial thigh muscles. Magnetic resonance imaging (MRI) of the thigh showed increased signal on proton density and T2-weighted images in the medial and lateral thigh compartments. High-resolution B-mode ultrasound showed hyperechoic changes in the anteromedial thigh muscles, with loss of normal myofascial interfaces, and a mixed appearance, bilaterally. Two months later, after the symptoms had begun to resolve, the images had improved. This case documents bilateral diabetic thigh infarction identified by abnormal technetium 99m PYP flow studies, MRI signal, and B-mode ultrasound imaging. PMID:8136579

  12. Magnet retained intraoral-extra oral combination prosthesis: a case report

    PubMed Central

    Kumar, Surender; Bera, Amit; Gupta, Tapas; Banerjee, Ardhendu

    2012-01-01

    Facial prosthesis is generally considered over surgical reconstruction to restore function and appearance in patients with facial defects that resulted from cancer resection. Retention of the prosthesis is challenging due to its size and weight. Retention can be achieved by using medical grade adhesives, resilient attachments, clips and osseointegrated implants. It can also be connected to obturator by magnets. This clinical report highlights the rehabilitation of a lateral midfacial defect with a two piece prosthesis that included an extra oral facial prosthesis and an intraoral obturator with the use of magnets. PMID:23236576

  13. Bilateral posterior cerebral artery infarction.

    PubMed

    Ryan, Davinia; Murphy, Sinead M; Hennessey, Michael J

    2010-01-01

    We report the case of a 70-year-old man who presented with short-term memory impairment and a homonymous left inferior quadrantanopia secondary to simultaneous bilateral posterior cerebral artery (PCA) territory infarction. As in more than a quarter of cases of PCA infarction, no aetiological cause was identified. Unlike the transient nature of symptoms in some cases following unilateral infarction, his deficits persisted on 2-month follow-up. PMID:22798298

  14. Compensation Following Bilateral Vestibular Damage

    PubMed Central

    McCall, Andrew A.; Yates, Bill J.

    2011-01-01

    Bilateral loss of vestibular inputs affects far fewer patients than unilateral inner ear damage, and thus has been understudied. In both animal subjects and human patients, bilateral vestibular hypofunction (BVH) produces a variety of clinical problems, including impaired balance control, inability to maintain stable blood pressure during postural changes, difficulty in visual targeting of images, and disturbances in spatial memory and navigational performance. Experiments in animals have shown that non-labyrinthine inputs to the vestibular nuclei are rapidly amplified following the onset of BVH, which may explain the recovery of postural stability and orthostatic tolerance that occurs within 10 days. However, the loss of the vestibulo-ocular reflex and degraded spatial cognition appear to be permanent in animals with BVH. Current concepts of the compensatory mechanisms in humans with BVH are largely inferential, as there is a lack of data from patients early in the disease process. Translation of animal studies of compensation for BVH into therapeutic strategies and subsequent application in the clinic is the most likely route to improve treatment. In addition to physical therapy, two types of prosthetic devices have been proposed to treat individuals with bilateral loss of vestibular inputs: those that provide tactile stimulation to indicate body position in space, and those that deliver electrical stimuli to branches of the vestibular nerve in accordance with head movements. The relative efficacy of these two treatment paradigms, and whether they can be combined to facilitate recovery, is yet to be ascertained. PMID:22207864

  15. Continuous measurement of intra-oral pH and temperature: development, validation of an appliance and a pilot study.

    PubMed

    Choi, J E; Loke, C; Waddell, J N; Lyons, K M; Kieser, J A; Farella, M

    2015-08-01

    To describe a novel approach for continuous measurement of intra-oral pH and temperature in individuals carrying out normal daily activities over 24 h. We designed, validated and constructed a custom-made appliance fitted with a pH probe and a thermocouple. Six subjects wore the appliance over a 24-h period for two non-consecutive days, while the intra-oral pH and temperature were measured continuously and recorded. Intra-oral pH and temperature were very similar across different recording days, the difference being not statistically significant (P ≥ 0.14). There was a noticeable difference in the pattern of variation of pH between day and night. During the day, the mean pH was 7.3 (±0.4) and dropped markedly only after consumption of acidic food and drinks. The intra-oral pH decreased slowly during sleep with an average pH of 6.6 (±0.4) being recorded. The difference between day and night was statistically significant (P = 0.002). The mean intra-oral temperature was 33.9 °C (±0.9) during daytime and 35·9 °C (±0·5) during sleep (P = 0.013) with minor fluctuations occurring over 24 h. The continuous and simultaneous intra-oral pH and temperature measurement system described in this report is reliable, easy to construct, able to measure variables over a sustained period and may serve as a future diagnostic tool in a number of applications. PMID:25809398

  16. Post-traumatic segmental myoclonus associated with bilateral olivary hypertrophy.

    PubMed

    Birbamer, G; Gerstenbrand, F; Kofler, M; Buchberger, W; Felber, S; Aichner, F

    1993-06-01

    We present clinical and magnetic resonance (MR) findings in three patients with segmental myoclonia occurring 11-18 months after severe brainstem injury. Palatal myoclonus and vertical ocular myorhythmia were present in all three patients and synchronous involuntary movements of the upper extremities ("wing beating") in two patients. MR-imaging showed multiple post-traumatic lesions within the dentato-rubro-olivary pathway ("myoclonic triangle"), associated with bilateral enlargement and increased signal intensity of the inferior olives. The signal abnormality was more prominent on proton density weighted images than on T2-weighted images, suggesting underlying pathological changes different from typical gliosis. PMID:8356884

  17. Radiation absorbed from dental implant radiography: a comparison of linear tomography, CT scan, and panoramic and intra-oral techniques

    SciTech Connect

    Clark, D.E.; Danforth, R.A.; Barnes, R.W.; Burtch, M.L. )

    1990-01-01

    Absorbed radiation dose in bone marrow, thyroid, salivary gland, eye, and skin entrance was determined by placement of lithium fluoride thermoluminescent dosimeters (TLD's) at selected anatomical sites within and on a human-like x-ray phantom. The phantom was exposed to radiation from linear tomographic and computer-assisted tomographic (CT) simulated dental implant radiographic examinations. The mean dose was determined for each anatomical site. Resulting dose measurements from linear tomography and computer-assisted tomography are compared with reported panoramic and intra-oral doses. CT examination delivered the greatest dose, while linear tomography was generally lowest. Panoramic and intra-oral doses were similar to those of linear tomography.

  18. Bilateral coronoid hyperplasia (Jacob disease on right and elongation on left): report of a case and literature review.

    PubMed

    Zhong, Shi-Chun; Xu, Zhi-Jie; Zhang, Zhi-Guang; Zheng, You-Hua; Li, Tang-Xin; Su, Ka

    2009-03-01

    A case is reported of bilateral coronoid hyperplasia. The literature is reviewed concerning this condition's etiology, pathogenesis, clinical characteristics, diagnosis, and treatment. Jacob disease and coronoid elongation are both clinical features of coronoid hyperplasia. It is usually accompanied by restricted opening. The etiology and pathogenesis of coronoid hyperplasia are unclear. The condition can be diagnosed by panoramic radiographs and with 3-dimensional reconstructions from computerized tomography image data sets. Hyperplasia of the coronoid processes can be treated using an intraoral approach for coronoidectomy and dynamic laser physiotherapy after surgery. Although hyperplasia of the coronoid processes is uncommon in clinic, it can be found through careful examination and proper radiographic study. A 39-year-old female patient was referred for coronoid hyperplasia (Jacob disease on right and elongation on left). The histologic diagnosis for the right condylar condition was osteochondroma. PMID:19157918

  19. Multiresolution Bilateral Filtering for Image Denoising

    PubMed Central

    Zhang, Ming; Gunturk, Bahadir K.

    2008-01-01

    The bilateral filter is a nonlinear filter that does spatial averaging without smoothing edges; it has shown to be an effective image denoising technique. An important issue with the application of the bilateral filter is the selection of the filter parameters, which affect the results significantly. There are two main contributions of this paper. The first contribution is an empirical study of the optimal bilateral filter parameter selection in image denoising applications. The second contribution is an extension of the bilateral filter: multiresolution bilateral filter, where bilateral filtering is applied to the approximation (low-frequency) subbands of a signal decomposed using a wavelet filter bank. The multiresolution bilateral filter is combined with wavelet thresholding to form a new image denoising framework, which turns out to be very effective in eliminating noise in real noisy images. Experimental results with both simulated and real data are provided. PMID:19004705

  20. Bilateral parotid enlargement due to malnutrition under the influence of the media in an adolescent in Lithuania.

    PubMed

    Mieliauskaite, Diana; Venalis, Algirdas; Graziene, Vida; Kirdaite, Gailute

    2007-07-01

    The elimination of censorship for the media in post-communist countries in transition has contributed to increases in the prevalence of several medical problems. Children and adolescents are particularly vulnerable to the messages conveyed through the media, which influence their perceptions and behaviour. We describe a case of bilateral parotid enlargement due to malnutrition under the influence of self-prescribed diet in an adolescent. A 15-year-old girl reported to our institution under suspicion of Sjögren's syndrome for medical advice. Two months ago she developed persistent bilateral parotid enlargement and a dry mouth. Her medical history revealed a weight loss due to "self-prescribed" reduce diet. Social questioning clarified high use of the media and influence on the body concept and self image. On extra oral examination, a diffuse parotid enlargement was seen bilaterally. The examination of the mouth showed a low moisture level of the intraoral mucosa. The unstimulated whole salivary flow rate was 2 ml in 15 min. Laboratory findings evidenced anemia (107 g/l). The serum albumin concentration indicated a reduced level (28 g/l). Search for antinuclear antibodies, anti-SSA antibodies, anti-SSB, -Sm, -RNP and anti-double-stranded DNA antibodies was negative. Evaluation for antibodies against hepatitis C, cytomegalovirus and Epstein-Barr virus infection and HIV rendered negative results. A histopathologic examination of labial salivary gland biopsy revealed a picture of sialoadenosis. From the above investigations, a diagnosis of sialoadenosis due to malnutrition was made. PMID:17198741

  1. Contact sensitivity to menthol and peppermint in patients with intra-oral symptoms.

    PubMed

    Morton, C A; Garioch, J; Todd, P; Lamey, P J; Forsyth, A

    1995-05-01

    We report 12 cases of contact sensitivity to the flavouring agents menthol and peppermint oil in patients presenting with intra-oral symptoms in association with burning mouth syndrome, recurrent oral ulceration or a lichenoid reaction. The patients were referred from the Glasgow Dental Hospital over a 4-year period for assessment of the possible contribution of contact sensitivity to their complaints. 5 patients with burning mouth syndrome demonstrated contact sensitivity to menthol and/or peppermint, with 1 patient sensitive to both agents, 3 positive to menthol only and 1 to peppermint only. 4 cases with recurrent intra-oral ulceration were sensitive to both menthol and peppermint. 3 patients with an oral lichenoid reaction were positive to menthol on patch testing, with 2 also sensitive to peppermint. 9 of the 12 cases demonstrated additional positive patch test results. After a mean follow-up of 32.7 months (range 9-48 months), of the 9 patients that could be contacted, 6 patients described clearance or improvement of their symptoms as a consequence of avoidance of menthol/peppermint. PMID:7634781

  2. Radiation dosage reduction in general dental practice using digital intraoral radiographic systems.

    PubMed

    Hayakawa, Y; Shibuya, H; Ota, Y; Kuroyanagi, K

    1997-02-01

    This report describes the radiation dosage reduction possible in the general dental practice with two CCD (charge-coupled device)-based intraoral radiographic systems: the RVG-S (Trophy Radiologie, Vincennes, France) and the Sens-A-Ray (Regam Medical Systems, Sundsvall, Sweden). Radiation dosages (air-kerma; Gy) necessary for obtaining clinically acceptable images were measured at the cone tip using an ionization chamber type 660-1 (Nuclear Associates, Victoreen, Inc., Carle Place, New York, USA). When the RVG-S was used with an Oramatic 70 (Trophy Radiologie) X-ray generator, dosages at the cone tip ranged from 322 to 612 microGy. These corresponded to 40-60% of the dosages necessary when using Ektaspeed dental X-ray film (Eastman Kodak, Rochester, New York, USA) with a Heliodent 70 (Siemens, Erlangen, Germany) X-ray generator. At 60 kVp, the Sens-A-Ray reduced the dosage in the order of 30% compared with Ektaspeed dental X-ray film. Reduction in radiation dosage is one of the benefits of digital intraoral radiographic systems in general dental clinics. The RVG-S provides greater dose savings than does the Sens-A-Ray. PMID:9566150

  3. Intraoral conversion of occlusal force to electricity and magnetism by biting of piezoelectric elements.

    PubMed

    Kameda, Takashi; Ohkuma, Kazuo; Sano, Natsuki; Ogura, Hideo; Terada, Kazuto

    2012-01-01

    Very weak electrical, magnetic and ultrasound signal stimulations are known to promote the formation, metabolism, restoration and stability of bone and surrounding tissues after treatment and operations. We have therefore investigated the possibility of intraoral generation of electricity and magnetism by occlusal force in an in vitro study. Biting bimorph piezoelectric elements with lead zirconate titanate (PZT) using dental models generated appropriate magnetism for bone formation, i. e. 0.5-0.6 gauss, and lower electric currents and higher voltages, i. e. 2.0-6.0 μA at 10-22 V (appropriate levels are 30 μA and 1.25 V), as observed by a universal testing machine. The electric currents and voltages could be changed using amplifier circuits. These results show that intraoral generation of electricity and magnetism is possible and could provide post-operative stabilization and activation of treated areas of bone and the surrounding tissues directly and/or indirectly by electrical, magnetic and ultrasound stimulation, which could accelerate healing. PMID:23207207

  4. Dental staff doses with handheld dental intraoral x-ray units.

    PubMed

    Gray, Joel E; Bailey, Edgar D; Ludlow, John B

    2012-02-01

    A handheld portable dental intraoral x-ray system is available in the United States and elsewhere. The system is designed to minimize the user's radiation dose. It includes specially designed shielding of the x-ray tube housing and an integral radiation shield to minimize backscatter. Personnel radiation dose records were obtained from 18 dental facilities using both the handheld system and a wall mounted dental x-ray system, providing 661 individual dose measurements. Dental staff doses were also compared for the handheld and conventional systems using both film and digital imaging for the same facilities and staff members. The results indicate that the doses for the handheld systems are significantly less than for wall-mounted systems. The average monthly dose for the handheld systems was 0.28 μSv vs. 7.86 μSv (deep dose equivalent) for the wall-mounted systems, a difference that is statistically significant at the p = 0.01 level. Consequently, there should be no concern about the use of this handheld dental intraoral x-ray system. Additional shielding efforts, (e.g., wearing a lead apron) will not provide significant benefit nor reduce staff radiation dose. PMID:22217586

  5. Role of intraoral distractors in management of cranial synostosis: An initial experience

    PubMed Central

    Sahoo, Nandakishor; Roy, Indranil Deb; Gupta, Vishal; Desai, Ajay Premanand

    2014-01-01

    Objective: The objective of the following study is to evaluate the results of strip craniectomy with distraction osteogenesis, using the intraoral distractor devices, as a modality of treatment for craniosynostosis. Materials and Methods: Two cases of cranial synostosis were selected for this study. The cases were operated for strip craniectomy with distraction osteogenesis using a pair of miniaturized intraoral distractor devices. Distraction was carried out after a latency period of 4 days at a rate of 0.5 mm twice a day. Total separation of osteotomized segments achieved was in the range of 25-28 mm. Results: Both patients were evaluated clinico-radiologically at 3, 6 and 12 months postoperatively. There was an increase in the occipital frontal circumference with improvement in the contour of the skull. Both the cases showed marked improvement of bowel habits, bladder control and cognitive behavior. Radiologically copper-beaten appearance reduced considerably suggesting improved intracranial pressure. Conclusion: Combination of distraction osteogenesis with strip craniectomy for the management of craniosynostosis is an effective treatment modality with promising results. PMID:24987594

  6. Activation of lateral hypothalamus-projecting parabrachial neurons by intraorally delivered gustatory stimuli.

    PubMed

    Tokita, Kenichi; Armstrong, William E; St John, Steven J; Boughter, John D

    2014-01-01

    The present study investigated a subpopulation of neurons in the mouse parabrachial nucleus (PbN), a gustatory and visceral relay area in the brainstem, that project to the lateral hypothalamus (LH). We made injections of the retrograde tracer Fluorogold (FG) into LH, resulting in fluorescent labeling of neurons located in different regions of the PbN. Mice were stimulated through an intraoral cannula with one of seven different taste stimuli, and PbN sections were processed for immunohistochemical detection of the immediate early gene c-Fos, which labels activated neurons. LH projection neurons were found in all PbN subnuclei, but in greater concentration in lateral subnuclei, including the dorsal lateral subnucleus (dl). Fos-like immunoreactivity (FLI) was observed in the PbN in a stimulus-dependent pattern, with the greatest differentiation between intraoral stimulation with sweet (0.5 M sucrose) and bitter (0.003 M quinine) compounds. In particular, sweet and umami-tasting stimuli evoked robust FLI in cells in the dl, whereas quinine evoked almost no FLI in cells in this subnucleus. Double-labeled cells were also found in the greatest quantity in the dl. Overall, these results support the hypothesis that the dl contains direct a projection to the LH that is activated preferentially by appetitive compounds; this projection may be mediated by taste and/or postingestive mechanisms. PMID:25120438

  7. Activation of lateral hypothalamus-projecting parabrachial neurons by intraorally delivered gustatory stimuli

    PubMed Central

    Tokita, Kenichi; Armstrong, William E.; St. John, Steven J.; Boughter Jr., John D.

    2014-01-01

    The present study investigated a subpopulation of neurons in the mouse parabrachial nucleus (PbN), a gustatory and visceral relay area in the brainstem, that project to the lateral hypothalamus (LH). We made injections of the retrograde tracer Fluorogold (FG) into LH, resulting in fluorescent labeling of neurons located in different regions of the PbN. Mice were stimulated through an intraoral cannula with one of seven different taste stimuli, and PbN sections were processed for immunohistochemical detection of the immediate early gene c-Fos, which labels activated neurons. LH projection neurons were found in all PbN subnuclei, but in greater concentration in lateral subnuclei, including the dorsal lateral subnucleus (dl). Fos-like immunoreactivity (FLI) was observed in the PbN in a stimulus-dependent pattern, with the greatest differentiation between intraoral stimulation with sweet (0.5 M sucrose) and bitter (0.003 M quinine) compounds. In particular, sweet and umami-tasting stimuli evoked robust FLI in cells in the dl, whereas quinine evoked almost no FLI in cells in this subnucleus. Double-labeled cells were also found in the greatest quantity in the dl. Overall, these results support the hypothesis that the dl contains direct a projection to the LH that is activated preferentially by appetitive compounds; this projection may be mediated by taste and/or postingestive mechanisms. PMID:25120438

  8. Effect of carbon dioxide laser treatment on lesion progression in an intraoral model

    NASA Astrophysics Data System (ADS)

    Featherstone, John D. B.; Fried, Daniel; Gansky, Stuart A.; Stookey, George K.; Dunipace, Ann J.

    2001-04-01

    Previous studies have shown that pretreatment of dental enamel by specific carbon dioxide laser conditions inhibited subsequent progression of caries-like lesions in vitro. The aim of the present study was to use an intra-oral model to determine whether similar inhibition is observed in the human mouth. A cross over study with 23 subjects and three regimens was used. Pre-formed varies-like lesions were made in extracted human enamel and exposed intra-orally in partial dentures in each subject to A) placebo dentifrice and no laser treatment, B) placebo dentifrice following laser pretreatment, or C) sodium fluoride dentifrice and no laser treatment during each of three study periods. Samples were assessed by micro radiography to compare the mineral loss before and after each treatment and drive a net change in mineral value. Overall P was not significantly different form L but both P and L were different from F. For those subjects who demineralized in P, L and F were significantly better than P, with L showing an 84 percent inhibition of further demineralization, but no enhancement of demineralization.

  9. Interrami intraoral fixation technique for severe mandibular rifle fragmented bullet injury management.

    PubMed

    Shuker, Sabri T

    2013-07-01

    Interrami intraoral Kirschner wire fixation technique is presented for the reduction, stabilization, and immobilization of a pulverized and avulsed lower jaw caused by rifle fragmented bullet injuries. This indirect mandibular war injury fixation technique was tolerated by the patients and tissue more than any indirect external fixation. In addition, it is easier than open reduction using large bone plates for disrupted ballistics mandibular injury defects. An interrami intraoral fixation is appropriate for severely disrupted mandibular hard and soft tissues, and has been adapted in cases of mass casualties and limited resources. Benefits of use include limited hospital beds and fewer follow-up visits. Rifle fragmented bullet injuries need more attention for several reasons: not only because of the higher mortality and devastating nature of the injuries, but also because these injuries are responsible for an unreported type of bullet biomechanism wounding in the craniofacial region. In turn, this necessitates specialized victim management. The survival rates depend on immediate proper execution of airway, breathing, and circulation, which become more complicated as it relates to airway compromise and oropharyngeal hemorrhage resuscitation. Survival is predicated on the implementation of feasible, sensible, life-saving techniques that are applied at the appropriate time. PMID:23851763

  10. Kinematics of intraoral transport and swallowing in the herbivorous lizard uromastix acanthinurus

    PubMed

    Herrel; Vree

    1999-05-01

    The kinematics of intraoral transport and swallowing in lizards of the species Uromastix acanthinurus (Chamaeleonidae, Leiolepidinae) were investigated using cineradiography (50 frames s-1). Additional recordings were also made using high-speed (500 frames s-1) and conventional video systems (25 frames s-1). Small metal markers were inserted into different parts of the upper and lower jaw and the tongue. Cineradiographic images were digitised, and displacements of the body, head, upper and lower jaw and the tongue were quantified. Twenty additional variables depicting displacements and the timing of events were calculated. Multivariate analyses of variance indicated significant differences between feeding stages. Remarkably, only very few food-type-dependent differences were observed during intraoral transport, and no such differences could be demonstrated during swallowing. Using previously published data for the closely related insectivorous lizard Plocederma stellio, the effect of dietary specialisation in U. acanthinurus on the kinematic variables while eating locusts was examined. Species differed in a number of gape- and tongue-related variables. These differences may be related to differences in tongue structure between the species. Clearly, U. acanthinurus possesses a specialised gut and dental structure that allows them efficiently to cut pieces from whole leaves. However, a decrease in modulatory capacity seems to be a consequence of dietary specialisation in Uromastix acanthinurus. PMID:10101110

  11. Comparative study of two intraoral laser techniques for soft tissue surgery

    NASA Astrophysics Data System (ADS)

    Swick, Michael D.; Richter, Alexander

    2003-06-01

    Historically, 810nm has been the predominant wavelength used for intraoral surgery, when diode lasers have been discussed, due to their large numbers in the market place. The techniques used intraorally with the 810nm diode have been relatively similar in most cases. Low powers, 1 or 2 watts, using continuous wave, are employed. The purpose of this study is to compare the thermal damage of the technique of using continuous wave at low powers, to using higher powers with a pulse mode and water for coolant, with the 980nm diode wavelength. During the study the laser fiber was held immobile eliminating surgical manipulation as an error. The resultant histology proves, while the volume of vaporization dramatically increases, thus giving the clinician the ability to reduce the time for destructive conduction of excess heat for a given procedure, the amount of coagulation actually decreases in width and depth. As an added benefit charring, which has been implicated in delayed healing is virtually eliminated. This evidence, coupled with excellent clinical results, lends validity to the use of pulsed higher powers and water coolant for the 980nm diode laser.

  12. Bilateral ECT induces bilateral increases in regional cortical thickness.

    PubMed

    van Eijndhoven, P; Mulders, P; Kwekkeboom, L; van Oostrom, I; van Beek, M; Janzing, J; Schene, A; Tendolkar, I

    2016-01-01

    Electroconvulsive therapy (ECT) is the most effective treatment for patients suffering from severe or treatment-resistant major depressive disorder (MDD). Unfortunately its underlying neurobiological mechanisms are still unclear. One line of evidence indicates that the seizures produced by ECT induce or stimulate neuroplasticity effects. Although these seizures also affect the cortex, the effect of ECT on cortical thickness is not investigated until now. We acquired structural magnetic resonance imaging data in 19 treatment-resistant MDD patients before and after a bilateral ECT course, and 16 healthy controls at 2 time points, and compared changes in cortical thickness between the groups. Our results reveal that ECT induces significant, bilateral increases in cortical thickness, including the temporal pole, inferior and middle temporal cortex and the insula. The pattern of increased cortical thickness was predominant in regions that are associated with seizure onset in ECT. Post hoc analyses showed that the increase in thickness of the insular cortex was larger in responders than in non-responders, which may point to a specific relationship of this region with treatment effects of ECT. PMID:27552587

  13. Multistep joint bilateral depth upsampling

    NASA Astrophysics Data System (ADS)

    Riemens, A. K.; Gangwal, O. P.; Barenbrug, B.; Berretty, R.-P. M.

    2009-01-01

    Depth maps are used in many applications, e.g. 3D television, stereo matching, segmentation, etc. Often, depth maps are available at a lower resolution compared to the corresponding image data. For these applications, depth maps must be upsampled to the image resolution. Recently, joint bilateral filters are proposed to upsample depth maps in a single step. In this solution, a high-resolution output depth is computed as a weighted average of surrounding low-resolution depth values, where the weight calculation depends on spatial distance function and intensity range function on the related image data. Compared to that, we present two novel ideas. Firstly, we apply anti-alias prefiltering on the high-resolution image to derive an image at the same low resolution as the input depth map. The upsample filter uses samples from both the high-resolution and the low-resolution images in the range term of the bilateral filter. Secondly, we propose to perform the upsampling in multiple stages, refining the resolution by a factor of 2×2 at each stage. We show experimental results on the consequences of the aliasing issue, and we apply our method to two use cases: a high quality ground-truth depth map and a real-time generated depth map of lower quality. For the first use case a relatively small filter footprint is applied; the second use case benefits from a substantially larger footprint. These experiments show that the dual image resolution range function alleviates the aliasing artifacts and therefore improves the temporal stability of the output depth map. On both use cases, we achieved comparable or better image quality with respect to upsampling with the joint bilateral filter in a single step. On the former use case, we feature a reduction of a factor of 5 in computational cost, whereas on the latter use case, the cost saving is a factor of 50.

  14. Bilateral Impedance Control For Telemanipulators

    NASA Technical Reports Server (NTRS)

    Moore, Christopher L.

    1993-01-01

    Telemanipulator system includes master robot manipulated by human operator, and slave robot performing tasks at remote location. Two robots electronically coupled so slave robot moves in response to commands from master robot. Teleoperation greatly enhanced if forces acting on slave robot fed back to operator, giving operator feeling he or she manipulates remote environment directly. Main advantage of bilateral impedance control: enables arbitrary specification of desired performance characteristics for telemanipulator system. Relationship between force and position modulated at both ends of system to suit requirements of task.

  15. Bilateral molariform mandibular second premolars.

    PubMed

    Acharya, Sonu; Kumar Mandal, Pradip; Ghosh, Chiranjit

    2015-01-01

    Macrodontia is a rare dental anomaly that refers to teeth that appear larger than normal. Generalised macrodontia can be associated with certain medical conditions and syndromes. This case report presents clinical and radiographic findings of isolated bilateral macrodontia in a 14-year-old child. The patient was referred to the clinic with local crowding of maxillary and mandibular teeth. Radiographic findings revealed the presence of impacted macrodont mandibular second premolar on one side and erupted macrodontic premolar on the other side and their distinct morphological appearance, characterized by large, multitubercular, and molariform crowns and tapering, single roots. PMID:25685564

  16. Immediate rehabilitation of the edentulous mandible using Ankylos SynCone telescopic copings and intraoral welding: a pilot study.

    PubMed

    Degidi, Marco; Nardi, Diego; Sighinolfi, Gianluca; Piattelli, Adriano

    2012-12-01

    The aim of this prospective study was to assess the suitability of immediate rehabilitation of the edentulous mandible using SynCone copings and the intraoral welding technique. Patients with an edentulous mandible were fitted with a removable restoration supported by an intraorally welded titanium bar. Copings were connected to their respective SynCone 5-degree abutments and then welded to a titanium bar using an intraoral welding unit. This framework was used to support the definitive restoration, which was delivered on the day of implant placement. Restoration success and survival, implant success, and biologic or technical complications were assessed immediately after surgery and at 6 and 12 months. Twenty-two patients were consecutively treated with 88 immediately loaded implants. No acrylic resin fractures or radiographically detectable alterations of the welded frameworks were present in the 22 restorations delivered. One implant (1.1%) failed 1 month after surgery; all remaining implants (98.9%) were clinically stable at the 12-month follow-up. Within its limitations, this pilot study demonstrated that it is possible to successfully rehabilitate the edentulous mandible on the day of surgery with a definitive restoration supported by an intraorally welded titanium framework and SynCone 5-degree abutments. PMID:23057062

  17. Immunoexpression of cleaved caspase-3 shows lower apoptotic area indices in lip carcinomas than in intraoral cancer

    PubMed Central

    LEITE, Ana Flávia Schueler de Assumpção; BERNARDO, Vagner Gonçalves; BUEXM, Luisa Aguirre; da FONSECA, Eliene Carvalho; da SILVA, Licínio Esmeraldo; BARROSO, Danielle Resende Camisasca; LOURENÇO, Simone de Queiroz Chaves

    2016-01-01

    ABSTRACT Objective This study aimed to evaluate apoptosis by assessing cleaved caspase-3 immunoexpression in hyperplastic, potentially malignant disorder (PMD), and malignant tumors in intraoral and lower lip sites. Material and Methods A retrospective study using paraffin blocks with tissues from patients with inflammatory fibrous hyperplasia (IFH), actinic cheilitis, oral leukoplakia, lower lip and intraoral squamous cell carcinoma (SCC) was performed. The tissues were evaluated by immunohistochemical analysis with anti-cleaved caspase-3 antibody. Apoptotic area index was then correlated with lesion type. Results From 120 lesions assessed, 55 (46%) were cleaved caspase-3-positive. The SCC samples (n=40) had the highest apoptotic area indices (n=35; 87.5%). Significant differences were detected between SCCs and PMDs (p=0.0003), as well as SCCs and IFHs (p=0.001), regarding caspase-3 immunopositivity. Carcinomas of the lower lip had lower apoptotic area indices than intraoral cancer (p=0.0015). Conclusions Cleaved caspase-3 immunoexpression showed differences in oral SCCs and PMDs and demonstrated a distinct role of apoptosis in carcinogenesis of intraoral and lower lip cancer. In future, the expression of cleaved caspase-3 with other target molecules in oral cancer may be helpful in delineating the prognosis and treatment of these tumors. PMID:27556207

  18. Sequentially evolved bilateral epidural haematomas.

    PubMed

    Rochat, P; Johannesen, H H; Poulsgård, L; Bøgeskov, L

    2002-12-01

    Sequentially evolved bilateral epidural haematomas, where the second haematoma evolves after surgical removal of the first haematoma, are rarely reported. We report two cases of this entity. One patient was involved in a road traffic accident and the other was suffering from a head injury after an assault. CT scans showed that both patients had an unilateral epidural haematoma with a thin presumably epidural haemorrhage on the opposite side. Both patients were operated for their epidural haematomas, but did not improve after surgical treatment, and postoperative CT scans revealed evolving of an epidural haematoma on the opposite side. After evacuation of the second epidural haematoma both patients recovered quickly. Sequentially evolved bilateral epidural haematomas are rare, but must be considered in the postoperative intensive care treatment in patients with epidural haematomas. Both cases emphasize the need for intensive care monitoring after an operation for an epidural haematoma and the need for CT scans if the patient does not improve quickly after removal of the haematoma. This is especially important if a small contralateral haematoma is seen on the initial CT scan. PMID:12445923

  19. [Simultaneous bilateral pneumothorax. Case report].

    PubMed

    Paolini, A; Caminiti, F; Tosato, F; Ruggieri, M; Paolini, G; Carnevale, L; Corsini, F; Marano, S; Monsellato, I

    2001-04-01

    A case report of a 44 year-old white man admitted to the surgical unit for a bilateral simultaneous pneumothorax is presented. The pneumothorax occurred on day one after a surgical operation for discal hernia; in the past the patient already presented a right spontaneous pneumothorax at 32 years of age and a left pneumothorax at 37 years of age, both treated with a pleural drainage. A thoracic drain was bilaterally positioned with a good result only in the right side. The persistence of the left pneumothorax induced the authors to perform a postero-lateral thoracotomy bullae excision and pleurectomy with a good postoperative course. After a few months a new right pneumothorax occurred and the patient was treated with a right postero-lateral thoracotomy, bullae resection and pleurectomy. On the basis of the case reported, the authors consider the different opportunities in the treatment of spontaneous pneumothorax in relation to the present knowledges and technologies. Surgical procedure is to be preferred in case of persistence of pneumothorax despite a pleural drain and in case of pneumothorax in high risk subjects. Even if thoracoscopy seems to give better results regarding postoperative pain, it is not always possible with such a method to perform a careful pleurectomy neither to obtain it in all cases (above all in secondary pneumothorax). Every case must then be carefully studied to choose the best treatment at present available. PMID:11353349

  20. Bilateral internal thoracic artery grafting

    PubMed Central

    2013-01-01

    The effectiveness of the left internal mammary artery graft to the anterior descending coronary artery as a surgical strategy has been shown to improve the survival rate and decrease the risk of adverse cardiac events in patients undergoing coronary bypass surgery. These clinical benefits appear to be related to the superior short and long-term patency rates of the internal thoracic artery graft. Although the advantages of using of both internal thoracic arteries (ITA) for bypass grafting have taken longer to prove, recent results from multiple data sets now support these findings. The major advantage of bilateral ITA grafting appears to be improved survival rate, while the disadvantages of complex ITA grafting include the increased complexity of operation, and an increased risk of wound complications. While these short-term disadvantages have been mitigated in contemporary surgical practice, they have not eliminated. Bilateral ITA grafting should be considered the procedure of choice for patients undergoing coronary bypass surgery that have a predicted survival rate of longer than ten years. PMID:23977627

  1. Unusual Bilateral Paramolars Associated with Clinical Complications

    PubMed Central

    Sulabha, A. N.; Sameer, C.

    2015-01-01

    Paramolars are rare supernumerary structures of maxillofacial complex that occur buccally or lingually near the molar row. Predominantly these occur singly; bilateral presentation is very rare. This paper reports two unusual bilateral presentations of paramolars with clinical complication and its management. One of the cases in the present paper also documents the cooccurrence of bilateral paramolars and microdontia of single tooth and one of its paramolars presented with multilobed crown with an anomalous buccal tubercle. PMID:26078890

  2. A clinical analysis of bilateral orbital fracture.

    PubMed

    Roh, Joon Ho; Jung, Jee Woong; Chi, Mijung

    2014-03-01

    Although bilateral orbital fracture can cause serious eyeball and facial skeletal problems, few reports have been issued on the topic. We analyzed the clinical features of bilateral orbital fracture by reviewing the medical records of 147 patients and compared bilateral and unilateral fractures by reviewing the literature.Bilateral orbital fracture was most common in men aged between 50 and 59 years. A traffic accident was the leading cause of trauma, and average time between trauma and surgery was 12.2 days. Bilateral medial fracture accompanied by nasal fracture accounted for the overwhelming majority, and impure blowout fracture in at least 1 eye occurred in 69.4% of the 147 patients. Associated ocular injuries seemed to be similar for bilateral and unilateral fracture. Thirty-five patients (23.8%) had other multiple traumas affecting other than the eyes, and this significantly increased the need for surgery (P < 0.05). Of the 48 patients who underwent surgery, including 4 cases of bilateral surgery, 21 patients who had ocular motility restriction with central diplopia within 30 degrees almost completely recovered. No significant relation between the timing of surgery and improvement was found. Although unilateral surgery was performed in most cases, facial asymmetry related to enophthalmos was unclear at 6 months postoperatively.In summary, bilateral orbital fracture was found to be clinically distinguishable from unilateral fracture in several aspects. We hope these findings provide a reference guide to the approach and management of bilateral orbital fracture. PMID:24514894

  3. Fast bilateral filtering using recursive moving sum

    NASA Astrophysics Data System (ADS)

    Igarashi, Masaki; Ikebe, Masayuki; Shimoyama, Sohsuke; Motohisa, Junichi

    We propose a constant-time algorithm for a bilateral filter. Bilateral filter can be converted into the operation of three-dimensional (3D) convolution. By using recursive moving sum, we can reduce the number of calculations needed to construct a pseudo-Gaussian filter. Applying one-dimensional Gaussian filter to the 3D convolution, we achieved a constant-time bilateral filter. We used a 3-GHz CPU without SIMD instructions, or multi-thread operations. We confirmed our proposed bilateral filter to be processed in constant time. In practical conditions, high PSNR values over 40 dB are obtained.

  4. Bilateral Neck of Femur Fractures in a Bilateral Below-Knee Amputee: A Unique Case.

    PubMed

    Lancer, Hannah R; Smitham, Peter; Ray, Pinak

    2016-01-01

    According to the National Hip Fracture Database, over 64,000 patients were admitted with a hip fracture across England, Wales, and Northern Ireland in 2013, but very few are bilateral, and there are no current cases in the literature of bilateral neck of femur fractures in a patient with bilateral below-knee amputations. We present a case of a 69-year-old bilateral below-knee amputee male admitted to the emergency department with bilateral hip pain and radiological evidence of bilateral displaced neck of femur fractures. The patient subsequently underwent synchronous bilateral total hip replacements under general anaesthetic and an epidural and then went on to make a full recovery. He was discharged 27 days after arrival in hospital. Outpatient follow-up at 3 months has shown that the patient has returned to a similar level of preinjury function and is still able to carry out his daily activities with walking aids and bilateral leg prostheses. PMID:26881162

  5. Bilateral Neck of Femur Fractures in a Bilateral Below-Knee Amputee: A Unique Case

    PubMed Central

    Lancer, Hannah R.

    2016-01-01

    According to the National Hip Fracture Database, over 64,000 patients were admitted with a hip fracture across England, Wales, and Northern Ireland in 2013, but very few are bilateral, and there are no current cases in the literature of bilateral neck of femur fractures in a patient with bilateral below-knee amputations. We present a case of a 69-year-old bilateral below-knee amputee male admitted to the emergency department with bilateral hip pain and radiological evidence of bilateral displaced neck of femur fractures. The patient subsequently underwent synchronous bilateral total hip replacements under general anaesthetic and an epidural and then went on to make a full recovery. He was discharged 27 days after arrival in hospital. Outpatient follow-up at 3 months has shown that the patient has returned to a similar level of preinjury function and is still able to carry out his daily activities with walking aids and bilateral leg prostheses. PMID:26881162

  6. Dental devices; classification for intraoral devices for snoring and/or obstructive sleep apnea. Final rule.

    PubMed

    2002-11-12

    The Food and Drug Administration (FDA) is classifying the intraoral devices for snoring and/or obstructive sleep apnea into class II (special controls). These devices are used to control or treat simple snoring and/or obstructive sleep apnea. This classification is based on the recommendations of the Dental Devices Panel (the Panel), and is being taken to establish sufficient regulatory controls that will provide reasonable assurance of the safety and effectiveness of these devices. This action is being taken under the Federal Food, Drug, and Cosmetic Act (the act), as amended by the Medical Device Amendments of 1976 (the 1976 amendments), the Safe Medical Devices Act of 1990 (the SMDA), and the Food and Drug Administration Modernization Act of 1997 (FDAMA). Elsewhere in this issue of the Federal Register, FDA is publishing a notice of availability of the guidance document that will serve as the special control for this final rule. PMID:12428642

  7. Cone beam computed tomography and intraoral radiography for diagnosis of dental abnormalities in dogs and cats

    PubMed Central

    Silva, Luiz Antonio F.; Barriviera, Mauricio; Januário, Alessandro L.; Bezerra, Ana Cristina B.; Fioravanti, Maria Clorinda S.

    2011-01-01

    The development of veterinary dentistry has substantially improved the ability to diagnose canine and feline dental abnormalities. Consequently, examinations previously performed only on humans are now available for small animals, thus improving the diagnostic quality. This has increased the need for technical qualification of veterinary professionals and increased technological investments. This study evaluated the use of cone beam computed tomography and intraoral radiography as complementary exams for diagnosing dental abnormalities in dogs and cats. Cone beam computed tomography was provided faster image acquisition with high image quality, was associated with low ionizing radiation levels, enabled image editing, and reduced the exam duration. Our results showed that radiography was an effective method for dental radiographic examination with low cost and fast execution times, and can be performed during surgical procedures. PMID:22122905

  8. Success and high predictability of intraorally welded titanium bar in the immediate loading implants.

    PubMed

    Fogli, Vaniel; Camerini, Michele; Lauritano, Dorina; Carinci, Francesco

    2014-01-01

    The implants failure may be caused by micromotion and stress exerted on implants during the phase of bone healing. This concept is especially true in case of implants placed in atrophic ridges. So the primary stabilization and fixation of implants are an important goal that can also allow immediate loading and oral rehabilitation on the same day of surgery. This goal may be achieved thanks to the technique of welding titanium bars on implant abutments. In fact, the procedure can be performed directly in the mouth eliminating possibility of errors or distortions due to impression. This paper describes a case report and the most recent data about long-term success and high predictability of intraorally welded titanium bar in immediate loading implants. PMID:24963419

  9. Intraoral Approach and Stereolithographic-guided Large Mandibular Reconstruction with Fibula Free Flap

    PubMed Central

    Agut-Busquet, Eugenia; Molina-Montes, Juan; Escuder-LaTorre, Oscar

    2014-01-01

    Summary: The reconstruction of mandibular defects has always been of great concern, and it still represents a challenge for head-and-neck reconstructive surgeons. The mandible plays a major role in mastication, articulation, swallowing, respiration, and facial contour. Thus, when undertaking mandibular reconstruction, restoration of both function and cosmetics should be considered as the measure of success. Microsurgical reconstruction is the gold-standard method to repair a segmental mandibular defect. Reconstruction of sizeable defects often needs a large neck incision, leading to unsatisfactory cosmetic outcomes. Virtual surgical planning and stereolithographic modeling are new techniques that offer excellent results and can provide precise data for mandibular reconstruction and improve postoperative outcomes. We present a case of complete intraoral resection and reconstruction of a large ameloblastoma of the mandible. PMID:25426382

  10. Success and High Predictability of Intraorally Welded Titanium Bar in the Immediate Loading Implants

    PubMed Central

    Fogli, Vaniel; Camerini, Michele; Carinci, Francesco

    2014-01-01

    The implants failure may be caused by micromotion and stress exerted on implants during the phase of bone healing. This concept is especially true in case of implants placed in atrophic ridges. So the primary stabilization and fixation of implants are an important goal that can also allow immediate loading and oral rehabilitation on the same day of surgery. This goal may be achieved thanks to the technique of welding titanium bars on implant abutments. In fact, the procedure can be performed directly in the mouth eliminating possibility of errors or distortions due to impression. This paper describes a case report and the most recent data about long-term success and high predictability of intraorally welded titanium bar in immediate loading implants. PMID:24963419

  11. Effective dose equivalent to the operator in intra-oral dental radiography

    SciTech Connect

    de Haan, R.A.; van Aken, J. )

    1990-08-01

    The effective dose equivalent to the operator in intra-oral dental radiography has been determined. The exposure from a bitewing radiograph and periapical views of the left maxillary incisors and first molar was measured at nine heights and 16 positions, all 1 m from the patient. The effective dose equivalent was determined using data from ICRP 51 (International Commission on Radiological Protection: Data for Use in Protection Against External Radiation). The values presented are related to an exposure of 1 C kg-1 (3876 R) measured free in air at the tube-end. They thus constitute ratios which are not influenced by the sensitivity of the film or other detector used and form standard tables which permit the calculation of the effective dose equivalent in clinical situations.

  12. Randomized controlled trial comparing direct intraoral digitization and extraoral digitization after impression taking.

    PubMed

    Quaas, Sebastian; Loos, René; Rudolph, Heike; Luthardt, Ralph G

    2015-01-01

    This study aimed to evaluate the correspondence of intraoral digitization (ID) with extraoral digitization (ED) after impression taking. One-stage putty-and wash impressions and ID were carried out in a randomized order for 10 subjects. The impressions were used to make casts, which were then subjected to ED. ID datasets were aligned to create computer-aided design reference models. Deviations between ID and ED were calculated. The mean positive and negative deviations were 37.7 and -48.4 µm, respectively, for one quadrant. The results showed that the ID system is well suited for the acquisition of single-tooth restorations and is of limited suitability for the acquisition of small multiple unit restorations. PMID:25588169

  13. [Suicidal single intraoral shooting by a shotgun--risk of misinterpretation at the crime scene].

    PubMed

    Woźniak, Krzysztof; Pohl, Jerzy

    2003-01-01

    The authors presented two cases of suicidal single intraoral shooting by a shotgun. The first case relates to a victim found near the peak of Swinica in the Tatra mountains. When the circumstances could have suggested fatal fall from a height and minute, insignificant external injuries were found, the pistol found at the scene has been the most important indicator leading to the actual cause of death. The second case relates to a 38-year-old male found in this family house in a village. Severe internal cranial injury (bone fragmentation) was diagnosed at the scene. A self-made weapon was previously removed and hidden from the scene by a relative of the victim. Before regular forensic autopsy X-ray examination was conducted which revealed multiple intracranial foreign bodies of a shape of a shot. After the results of the autopsy the relative of the deceased indicated the location of the weapon. PMID:14971300

  14. The integral dose in panoramic intraoral x-ray tube radiography

    SciTech Connect

    Hayami, A.; Fujishita, M.; Sumida, A.; Kanke, M.; Fujiki, T.; Uemura, S.; Fuchihata, H.

    1983-07-01

    A Monte Carlo computer program was developed to estimate the integral dose to the head and thyroid for panoramic intraoral x-ray tube radiography. The advantage of this computer simulation is that it is able to avoid many of the difficulties associated with low-energy and low-dose x-ray dosimetry. The calculations were made for maxillary and mandibular projections separately, using 10 kv. increments between 40 and 60 kv. The results obtained were presented in terms of the integral dose per milliampere second. Typical integral doses for a routine examination of the head are 2.1 mJ. and 8.5 microJ for the thyroid during mandibular radiography and 1.7 microJ for the thyroid during radiography of the maxilla using 55 kv. and 0.5 mAs.

  15. Bilateral treatment for alopecia areata.

    PubMed

    Torchia, Daniele; Schachner, Lawrence A

    2010-01-01

    A 4-year-old, otherwise healthy white girl was referred for a 15-month history of alopecia areata. Anthralin 0.1% cream was prescribed for the left side of the scalp, while corticosteroids for the right side. After 4 months, only the right side of the scalp showed hair regrowth. Half-side strategy, that is, treating one side and managing the other--divided by the mid sagittal suture--as an internal control for no treatment, placebo or other treatment, has been commonly used in clinical studies for decades. In everyday practice, bilateral treatment is useful to evaluate the responsiveness to two topically delivered interventions and diminishes the time necessary to identify an effective one. PMID:20653874

  16. Textural characterization of finished and polished composites over time of intraoral exposure.

    PubMed

    Turssi, Cecilia Pedroso; Rodrigues, Antonio Luiz; Serra, Mônica Campos

    2006-02-01

    This in situ study sought to evaluate the surface roughness evolution of resin composites finished and polished by different methods. A total of 108 rectangular-shaped specimens of a microfilled and a hybrid composite were cured against a Mylar matrix strip and left unpolished or instrumented with diamond burs, Al2O3-coated disks, Al2O3-impregnated UDMA disk, or with diamond burs followed by either one of the disks. After specimens had been profiled for the average surface roughness (Ra, microm), 18 volunteers wore a removable palatal appliance, which accommodated one specimen of each one of the 12 groups investigated. Surface roughness for up to 28 days of intraoral exposure was then measured at 1- or 7-day intervals. A split-plot ANOVA (alpha = 0.05) revealed a significant interaction between group and time. Tukey's test and regression analyses ascertained that initially finishing with burs only provided the roughest surface to both composites. Unpolished surfaces and those specimens polished with Al2O3-coated disks, regardless of previous use of diamond burs, attained smoother surface. The Al2O3-impregnated UDMA disk was capable of smoothening the surface of the hybrid material previously finished with diamond burs. The roughness achieved after finishing and polishing composites may be either smoothened or roughened after intraoral exposure. On the basis of the roughness range, it is advisable to use Al2O3-coated disks, regardless of whether diamond burs were previously used. Al2O3-impregnated UDMA disks (with or without previous application of diamond burs) may be also suitable for instrumenting hybrid restoratives. PMID:16206257

  17. Effect of various intraoral repair systems on the shear bond strength of composite resin to zirconia

    PubMed Central

    Han, In-Hae; Kang, Dong-Wan; Chung, Chae-Heon; Choe, Han-Cheol

    2013-01-01

    PURPOSE This study compared the effect of three intraoral repair systems on the bond strength between composite resin and zirconia core. MATERIALS AND METHODS Thirty zirconia specimens were divided into three groups according to the repair method: Group I- CoJet™ Repair System (3M ESPE) [chairside silica coating with 30 µm SiO2 + silanization + adhesive]; Group II- Ceramic Repair System (Ivoclar Vivadent) [etching with 37% phosphoric acid + Zirconia primer + adhesive]; Group III- Signum Zirconia Bond (Heraus) [Signum Zirconia Bond I + Signum Zirconia Bond II]. Composite resin was polymerized on each conditioned specimen. The shear bond strength was tested using a universal testing machine, and fracture sites were examined with FE-SEM. Surface morphology and wettability after surface treatments were examined additionally. The data of bond strengths were statistically analyzed with one-way ANOVA and Tamhane post hoc test (α=.05). RESULTS Increased surface roughness and the highest wettability value were observed in the CoJet sand treated specimens. The specimens treated with 37% phosphoric acid and Signum Zirconia Bond I did not show any improvement of surface irregularity, and the lowest wettability value were found in 37% phosphoric acid treated specimens. There was no significant difference in the bond strengths between Group I (7.80 ± 0.76 MPa) and III (8.98 ± 1.39 MPa). Group II (3.21 ± 0.78 MPa) showed a significant difference from other groups (P<.05). CONCLUSION The use of Intraoral silica coating system and the application of Signum Zirconia Bond are effective for increasing the bond strength of composite resin to zirconia. PMID:24049565

  18. The use of intraoral radiographs for identification of edentulous patients rehabilitated with implants.

    PubMed

    Ahlqvist, J

    2016-01-01

    The aims of this study were; i) to determine the accuracy by which two intra-oral radiographic examinations performed on patients with edentulous mandibles treated with dental implants can be matched. ii) to determine whether prosthodontic supra-construction is important for matching. iii) to investigate whether there is a difference between oral and maxilla-facial radiologists (OMR) and dental practitioners, not specialized in oral and maxillofacial radiology (NOMR), regarding their ability to match. The specific features of the radiographs used by the operators to acquire a match were also investigated. Intra-oral radiographic examinations from 59 patients were utilized. Radiographic examinations from 47 patients carried out at placement of the supra-construction and at subsequent follow-up examinations were used as "ante-mortem" and "post-mortem" records respectively. Examinations from 12 patients were added to the "post-mortem" records without "ante-mortem" records being available. The study was divided into two parts. In Part One all "ante"- and "post-mortem" records had the supra-construction masked and in Part Two it was visible. Seven dentists (4 OMR, 3 NOMR) were instructed to specify on what basis each matching was made on the confidence of a three-graded scale OMR had 93.2 % and 98.5 % accuracy in Parts One and Two respectively. NOMR had 63.8 % and 87.9 %. Bone anatomy was the most commonly used feature by OMR to obtain a match. For NOMR it was the appearance of the fixtures. OMR reported higher confidence in their ability to match the examinations. This study indicates that OMR could be a valuable resource in cases of identification where dental implants are a feature of the post-mortem dental records. PMID:27350697

  19. Detection of cavitated approximal surfaces using cone beam CT and intraoral receptors

    PubMed Central

    Wenzel, A; Hirsch, E; Christensen, J; Matzen, L H; Scaf, G; Frydenberg, M

    2013-01-01

    Objectives The aim of this study was to compare cone beam CT (CBCT) in a small field of view (FOV) with a solid-state sensor and a photostimulable phosphor plate system for detection of cavitated approximal surfaces. Methods 257 non-filled approximal surfaces from human permanent premolars and molars were recorded by two intraoral digital receptors, a storage phosphor plate (Digora Optime, Soredex) and a solid-state CMOS sensor (Digora Toto, Soredex), and scanned in a cone beam CT unit (3D Accuitomo FPD80, Morita) with a FOV of 4 cm and a voxel size of 0.08 mm. Image sections were carried out in the axial and mesiodistal tooth planes. Six observers recorded surface cavitation in all images. Validation of the true absence or presence of surface cavitation was performed by inspecting the surfaces under strong light with the naked eye. Differences in sensitivity, specificity and agreement were estimated by analysing the binary data in a generalized linear model using an identity link function. Results : A significantly higher sensitivity was obtained by all observers with CBCT (p < 0.001), which was not compromised by a lower specificity. Therefore, a significantly higher overall agreement was obtained with CBCT (p < 0.001). There were no significant differences between the Digora Optime phosphor plate system and the Digora Toto CMOS sensor for any parameter. Conclusions CBCT was much more accurate in the detection of surface cavitation in approximal surfaces than intraoral receptors. The differences are interpreted as clinically significant. A CBCT examination performed for other reasons should also be assessed for approximal surface cavities in teeth without restorations.

  20. A primary study of appropriate intraoral scanning frequency of single 3D image

    NASA Astrophysics Data System (ADS)

    Li, Hong; Lyu, Peijun; Sun, Yuchun; Wang, Yong; Liang, Xiaoyue

    2015-07-01

    Objective To make a quantitative analysis between sampling frequencies and micro-movement distance of mark points on tooth surfaces, and to provide a reference for sampling frequency settings of intraoral scanning systems. Methods Mark points affixed to the incisors of five subjects. In total, 3600 groups of tracking point coordinates were obtained with frequencies of 60, 150 and 300 Hz using an optical 3D tracking system. The data was then re-sampled to obtain coordinates at lower frequencies (5, 10, 15 and 20 Hz) at equal intervals of groups of tracking point coordinates. Change in distance (Δd) was defined as the change in position of a single v from one sampling time point to another, and was valued by clinical accuracy requirement (20-100μm). The curve equation was fit quantitatively between Δd median (M) and the sampling frequency (f). The difference between upper and lower incisor mark points were analyzed by a non-parametric test; α=0.05. Result When the frequency (f) was 60 Hz, upper jaw Δd median (M) and interquartile (Q) were 14.4 μm and 9.2 μm, respectively, while the lower Δd(M) and (Q) were 6.4 μm and 10.2 μm, respectively. Every Δd value was less than 100 μm, while 74% of Δd vales were less than 20 μm. Δd(M) and f satisfy the power curve equation: Δd(M)=0.526×f-0.979(f∈[5,300]). Significant differences of incisor feature points were noted between upper and lower jaws of the same subject (P<0.01). Conclusion Clinical accuracy can be met when the sampling frequency of the intraoral scanning system is 60 Hz.

  1. Simultaneous and spontaneous bilateral quadriceps tendons rupture.

    PubMed

    Celik, Evrim Coşkun; Ozbaydar, Mehmet; Ofluoglu, Demet; Demircay, Emre

    2012-07-01

    Simultaneous and spontaneous bilateral quadriceps tendon rupture is an uncommon injury that is usually seen in association with multiple medical conditions and some medications. We report a case of simultaneous and spontaneous bilateral quadriceps tendon rupture that may be related to the long-term use of a statin. PMID:22561379

  2. Spontaneous bilateral adrenal hemorrhage following cholecystectomy

    PubMed Central

    Dahan, Meryl; Lim, Chetana; Salloum, Chady

    2016-01-01

    Postoperative bilateral adrenal hemorrhage is a rare but potentially life-threatening complication. This diagnosis is often missed because the symptoms and laboratory results are usually nonspecific. We report a case of bilateral adrenal hemorrhage associated with acute primary adrenal insufficiency following laparoscopic cholecystectomy. The knowledge of this uncommon complication following any abdominal surgery allows timey diagnosis and rapid treatment. PMID:27275469

  3. Bilateral microperc in a severe kyphoscoliosis.

    PubMed

    Dağgülli, Mansur; Penbegül, Necmettin; Dede, Onur; Utanğaç, Mehmet Mazhar

    2016-03-01

    Percutaneous nephrolithotomy is the standard modality for large renal calculi in normal and abnormal renal anatomic situations. This case report describes a 57-year-old male patient who presented with bilateral kidney stones and severe kyphoscoliosis. He had successfully been treated with a bilateral microperc technique. PMID:27011881

  4. Bilateral pulmonary sequestration: computed tomographic appearance

    SciTech Connect

    Wimbish, K.J.; Agha, F.P.; Brady, T.M.

    1983-04-01

    Intralobar pulmonary sequestration is one manifestation of the wide spectrum of congenital bronchopulmonary foregut malformations. Bilateral intralobar pulmonary sequestration is an exceedingly rare anomaly. Only two pathologically proven cases and one possible case have been reported. We report a case presenting as bilateral paraspinal masses, studied by computed tomograpy (CT) and angiography.

  5. Bilateral parotid swelling: a radiological review

    PubMed Central

    Gadodia, A; Bhalla, A S; Sharma, R; Thakar, A; Parshad, R

    2011-01-01

    Bilateral parotid swelling is not an uncommon occurrence and may pose a challenge for clinicians and radiologists. Numerous causes of bilateral parotid swellings have been identified. The purpose of this pictorial review is to display this wide array with a focus on multimodality approach. PMID:21960397

  6. Submaximal Expression of the Bilateral Deficit

    ERIC Educational Resources Information Center

    McLean, Scott P.; Vint, Peter F.; Stember, Amanda J.

    2006-01-01

    Thirty-six participants performed bilateral and unilateral isometric elbow flexion trials at what they perceived to be 100, 75, 50, and 25% of maximal effort. Absolute bilateral deficits ranged from -16% at 25% effort to -10% at 100% effort. The deficit included a component independent of consciousness and a component inversely related to…

  7. Bilateral microperc in a severe kyphoscoliosis

    PubMed Central

    Dağgülli, Mansur; Penbegül, Necmettin; Dede, Onur; Utanğaç, Mehmet Mazhar

    2016-01-01

    Percutaneous nephrolithotomy is the standard modality for large renal calculi in normal and abnormal renal anatomic situations. This case report describes a 57-year-old male patient who presented with bilateral kidney stones and severe kyphoscoliosis. He had successfully been treated with a bilateral microperc technique. PMID:27011881

  8. CT demonstration of bilateral adrenal hemorrhage

    SciTech Connect

    Ling, D.; Korobkin, M.; Silverman, P.M.; Dunnick, N.R.

    1983-08-01

    Bilateral adrenal hemorrhage with subsequent adrenal insufficiency is a recognized complication of anticoagulant therapy. Because the clinical manifestations are often nonspecific, the antemortem diagnosis of adrenal hemorrhage has been a difficult clinical problem. Computed tomography (CT) provides detailed images of the adrenal glands that are not possible with conventional imaging methods. The CT findings of bilateral adrenal hemorrhage in an anticoagulated patient are reported.

  9. Sarcoidosis Presenting as Bilateral Vocal Cord Paralysis due to Bilateral Vagal Nerve Involvement.

    PubMed

    Yamasue, Mari; Nureki, Shin-Ichi; Ushijima, Ryoichi; Mukai, Yutaka; Goto, Akihiko; Kadota, Jun-Ichi

    2016-01-01

    We herein report a rare case of sarcoidosis presenting as bilateral vocal cord paralysis due to bilateral vagal nerve involvement. A 72-year-old woman with uveitis of the left eye complained of hoarseness and aspiration due to bilateral vocal cord paralysis. An endobronchial needle aspiration biopsy specimen of the mediastinal lymph nodes showed non-caseating epithelioid cell granuloma. Total protein and cell concentrations in the cerebrospinal fluid were increased. We diagnosed her to have sarcoidosis with bilateral vagal nerve involvement. Corticosteroid therapy improved her symptoms of hoarseness and aspiration. Sarcoidosis should therefore be taken into consideration as a potential cause of bilateral vocal cord paralysis. PMID:27150886

  10. Validity of Intraoral Scans Compared with Plaster Models: An In-Vivo Comparison of Dental Measurements and 3D Surface Analysis

    PubMed Central

    2016-01-01

    Purpose Dental measurements have been commonly taken from plaster dental models obtained from alginate impressions can. Through the use of an intraoral scanner, digital impressions now acquire the information directly from the mouth. The purpose of this study was to determine the validity of the intraoral scans compared to plaster models. Materials and Methods Two types of dental models (intraoral scan and plaster model) of 20 subjects were included in this study. The subjects had impressions taken of their teeth and made as plaster model. In addition, their mouths were scanned with the intraoral scanner and the scans were converted into digital models. Eight transverse and 16 anteroposterior measurements, 24 tooth heights and widths were recorded on the plaster models with a digital caliper and on the intraoral scan with 3D reverse engineering software. For 3D surface analysis, the two models were superimposed by using best-fit algorithm. The average differences between the two models at all points on the surfaces were computed. Paired t-test and Bland-Altman plot were used to determine the validity of measurements from the intraoral scan compared to those from the plaster model. Results There were no significant differences between the plaster models and intraoral scans, except for one measurement of lower intermolar width. The Bland-Altman plots of all measurements showed that differences between the two models were within the limits of agreement. The average surface difference between the two models was within 0.10 mm. Conclusions The results of the present study indicate that the intraoral scans are clinically acceptable for diagnosis and treatment planning in dentistry and can be used in place of plaster models. PMID:27304976