... because extra bone extends out over the normal rim of the acetabulum. The labrum can be crushed under the prominent rim of the acetabulum. Cam. In cam impingement the ...
MedlinePLUS
... This allows the thighbone to bump into the rim of the acetabulum during normal hip movement. Share ...
Acute hematogenous osteomyelitis (AHOM) of the acetabulum is a rare condition in children and usually caused by Staphylococcus aureus. We present an 11-year-old soccer athlete who suffered from acute osteomyelitis involving the acetabulum caused by S. capitis, a normal flora of the human skin but never reported in this condition. The disease was associated ...
PubMed Central
The authors compare the life cycle of Acetabularia acetabulum (Dasycladaceae) grown under artificial or under natural conditions. New evidence is presented, supporting the view that in nature Acetabularia behaves as a 'pluriannual' plant.
National Technical Information Service (NTIS)
This paper examines the effect of changes in membrane potential on the critical parameters of delayed luminescence of Acetabularia acetabulum. We show that these parameters are altered by changes in membrane potential in ways that may reflect concomitant changes in energy storage and energy coupling. PMID:10877070
PubMed
We report two cases of osteoid osteoma of the acetabulum associated with severe chronic synovitis. The diagnosis is difficult and usually delayed because the acetabulum is a rare site for this tumor and clinical signs are nonspecific. Computed tomography (CT) scanning is the best diagnostic technique. An intraarticular surgical approach allows complete ...
Energy Citations Database
In this case report, we describe the arthroscopic removal of an osteoid osteoma from the acetabulum in a young adolescent. After identifying the osteoid osteoma close to the cartilage with MRI and CT investigations, we decided that in this case, arthroscopic removal was the best treatment. In the case of an osteoid osteoma in the acetabulum close to the ...
The stability of the polyethylene acetabulum cemented on a substrate made of frozen bone grafts was investigated. The force was applied to the edge of the acetabulum and the magnitude of the force and resulting displacement were recorded. These tests were preceded by stress testing, during which the acetabulum was subjected to loading ...
The arterial supply of the acetabulum is studied in 30 human hip-pelvis specimens utilizing conventional angiography, 3 D-CT and maceration. 3 specimens out of 30 had to be excluded due to extravasation and incomplete filling. The arteries of the pelvis were filled with barium sulfate in 16 cases and in 11 cases with a solution of resin and lead powder. Conventional angiograms ...
In late developmental dysplasia of the hip in childhood, the deformed dysplastic acetabulum is malaligned and has lost its shape due to pressure from the subluxed femoral head. The outer part of the acetabulum involves the upper part of the original acetabulum, thereby giving a bipartite appearance. A clear edge separates the outer ...
The computed tomographic (CT) and conventional radiographic appearances of the acetabulum are correlated for assessment of acetabular fractures according to the Judet and Letournel classification system, a system widely used by orthopedic surgeons performing fracture reduction and external fixation of the acetabulum. A desiccated pelvis was marked along ...
... acetabular articulation occurs between the neck of the femur and the antitrochanter, and operates as a hinge ... to the articulation of the head of the femur with the acetabulum, which is a pivot joint ....
NBII National Biological Information Infrastructure
... the acetabulum and the posterior edge of the sacral articulation), relative to the total length of the ... high dorsoventrally, and it protrudes dorsally above the sacral articulation as in Cladosictis an...
... No trace of the suturai surfaces for the sacral ribs is discernible. The acetabulum of Koilamasuchus is ... of the length of the bone; and first sacral rib plate-like, contacting ilium in a straight ... ...
Dysplasia epiphysealis hemimelica (DEH), or Trevor's disease, is a rare disorder that most commonly affects the epiphysis of long bones in children. Rarely, major joints such as the hip can be involved. In this paper we describe a successfully treated case involving the acetabulum, documented with multiple imaging modalities, intraoperative photographs, histology, and ...
We describe a patient in whom an initially intact sciatic nerve became rapidly encased in heterotopic bone formed in the abductor compartment after reconstruction of the posterior wall of the acetabulum following fracture. Prompt excision and neural release followed by irradiation and administration of indometacin resulted in a full neurological recovery and no recurrence 27 ...
Radiographic discontinuity of the acetabulum is a frequently encountered entity which has been described by various authors. We have been unable to find an explanation of the nature of this discontinuity in the literature. By correlating dried skeletal specimens with their radiographic appearances, we found the anatomic basis for this phenomenon was an accessory fossa in the ...
This paper compares some features of the delayed luminescence in the seconds range emitted from an unicellular alga Acetabularia acetabulum and from some solid state systems. Results lead us to think that such delayed luminescence is connected to the dimension of the ordered structures present in both biological and solid state systems. In particular, for the biological system ...
The volatile halogenated methyl ethyl ether is used as anesthetic to inhibit actin-based dynamics directly or indirectly in animal cells. In plant cells, most intracellular movements are related with actin pathways too. We utilized isoflurane to study the dynamic choloroplast organization in unicellular baby and adult alga Acetabularia acetabulum. Fluorescence spectra were ...
NASA Astrophysics Data System (ADS)
Femoroacetabular impingement (FAI) is a pathomechanical concept describing the early and painful contact of morphological changes of the hip joint, both on the acetabular, and femoral head sides. These can lead clinically to symptoms of hip and groin pain, and a limited range of motion with labral, chondral and bony lesions. Pincer impingement generally involves the acetabular side of the joint ...
The aim of the present study was to assess the initial stability of uncemented press-fit acetabular components using a newly developed reamer designed to optimize the surgical preparation of the acetabulum. Ten synthetic human pelves were used to investigate the stability of 20 uncemented press-fit acetabular components, each of which was tested in a servohydraulic testing ...
... similar to Preptetos rotto in having an entire ovary but differs from it in the sucker ratio, ... 013). Genital pore mid- or posterosinistral to acetabulum. Ovary follicular, with 19�30 (23) follicles, us...
Little is known about the influence of simple limbectomy on the growth of the acetabulum. An experimental study was carried out in ten monkeys divided into two groups: limbectomy only (Group A) and limbectomy with concomitant cartilage resection (Group B). After three years and four months postoperatively, monkeys were sacrificed. Excised joints were examined macro-and ...
... the formation of the acetabulum. The small, oval obturator foramen is positioned anteroventrally to the contact with ... iliumIcl��interclaviclein��intermediumIs��ischiumJ��jugalM��maxillaN��nasalobt. fo�...
The objectives of pelvic osteotomies are to improve femoral head coverage and coxofemoral joint stability. The most currently used osteotomies can be divided into reorientation osteotomies (Salter and Pol le C�ur triple osteotomy) and acetabuloplasties (Pemberton and Dega). All these osteotomies share an identical installation on the table and bikini-type incision. The Salter osteotomy uses a ...
A 40-year-old man sustained trauma while walking and presented three months after trauma. The attitude of left hip was flexion, neutral rotation, and neutral abduction/adduction with an arc of flexion available from 30� to 90�. No movement was possible in other planes. On roentgenogram and 3D computed tomography, the femoral head was lying inferior and medial to the ...
Exact Match Begins With Contains Name/Code Property Relationship Home | View Hierarchy | Subsets | Help Visited Concepts EVS Home NCI Metathesaurus Browser NCI Term Browser NCI Terminology Resources Term Suggestion Acetabulum (Code C32042) Suggest
Cancer.gov
Femoroacetabular impingement (FAI) is a relatively recently described but important cause of hip pain which frequently affects young and otherwise healthy patients. FAI results from an abnormal contact between the acetabulum and the femur secondary to a v...
IntroductionRevision acetabulum arthroplasty is one of the common procedures, which has been on the rise recently. Many implants are available in the market with variable results. Aseptic loosening is the most common indication for revision acetabulum arthroplasty. Birmingham dysplasia cup has been used occasionally in these complex procedures. We know ...
Eurytrema pancreaticum (Janson, 1889)(Trematoda: Dicrocoeliidae) is described from Bos Indicus from East Java, Indonesia. Select measureable characters, correlated with body size, revealed the greatest variability in the acetabulum, pharynx, and left test...
10 nm diameter filaments were observed in whole-mount preparations of algae of diverse phyla: Acetabularia acetabulum and A. major (Chlorophyta), Chara australis and Nitella flexilis (Charophyta), and Poterioochromonas malhamensis (Chrysophyta). A polyclonal antibody raised against a basic, 50 kDa DNA-binding protein of A. acetabulum stains the filaments ...
enhanced CT scans as a function of joint spacing, agent concentration, imaging direction and resolution in terms of general clinical applications of CT for imaging articular cartilage in diarthrodial joints they form the acetabulum (Figure 2.1). Joints adjacent to the pelvis include the sacroiliac (SI) and pubis
E-print Network
We report here a case of posterior dislocation of hip with fracture of posterior lip of acetabulum, with retained fracture fragments after a successful closed reduction. The fractured fragments were removed by arthroscopy of the hip. The technique of hip arthroscopy used in removing the fragments is discussed.
... diverticula and an accessory sucker on the acetabulum. Cercaria owreae (Hutton, 1954) has 6 small diverticula on ... trematodes, including a new and unique type of cercaria. Nature 182:960�961. CrossRef, ...
... position of the genital pore relative to the pharynx: Cyclocoelum Brandes, 1892 in which the genital pore ... poorly developed. Acetabulum absent. Mouth subterminal, prepharynx short, pharynx well develop...
...specified in Figure V3 in appendix A to this subpart, with the seatpan and the seatback surfaces covered with a 2-mm-thick PTFE (Teflon) sheet; (3) Align the outermost portion of the pelvis flesh of the impacted side of the seated dummy...
Code of Federal Regulations, 2010
The processes are as follows: 1) Life-sized photoelastic models molded from a cadaver pelvis are made of Epoxy resin. 2) In order to practice the stress freezing process, the models are set to our original loading apparatus in the electric heater. The forces exerted on the hip models are both body weight and four kinds of muscular forces, those of the abductor, adductor, rectus femoris and gluteus ...
The attachment of Clinostomum sp. to the oesophagus of the bird definitive host Ardea cocoi is reported. The parasite attaches to the mucous layer of the oesophagus by the acetabulum, oral sucker, and oral collar. The mucous layer of the oesophagus engulfed by the oral sucker presents an intense liquefactive necrosis, and the engulfment is not likely to contribute ...
A 68-year-old man with hepatocellular carcinoma and known skeletal metastasis developed right hip pain and gait disturbance due to an osteolytic metastasis in the right acetabulum. This was treated initially with chemoembolization and radiation therapy. When these procedures proved unsuccessful percutaneous injection of acrylic bone cement into the ...
BackgroundNumerous structural deformities of the acetabulum are associated with hip osteoarthritis (OA). Acetabular retroversion has been implicated in the development of femoroacetabular impingement. However, it is unknown if retroversion occurs from isolated excessive bone in the superior acetabulum or a torsional phenomenon of the entire pelvic ...
Three-dimensional surface models of the normal hemipelvis derived from volumetric CT data on 42 patients were used to determine the radius, depth and orientation of the native acetabulum. A sphere fitted to the lunate surface and a plane matched to the acetabular rim were used to calculate the radius, depth and anatomical orientation of the acetabulum. For ...
To our knowledge, treatment of focal osteochondral defects of the acetabulum with osteochondral allograft transplantation has not been described. As with osteochondral lesions of other weight-bearing surfaces, these defects may lead to disabling pain and early degenerative changes. In older patients who fail nonoperative treatment, hip arthroplasty is a reliable option to ...
The Rim Cutter (Stryker Orthopedics, Mahwah, New Jersey) is a tool designed to cut a ledge inside the rim of the acetabulum, onto which a precisely trimmed, cemented, flanged cup can be fitted. The aim was to investigate the effect of the Rim Cutter on the intra-acetabular cement mantle pressure and the depth of cement penetration during cup insertion. The study had two parts. ...
BackgroundAcetabularia acetabulum is a giant unicellular green alga whose size and complex life cycle make it an attractive model for understanding morphogenesis and subcellular compartmentalization. The life cycle of this marine unicell is composed of several developmental phases. Juvenile and adult phases are temporally sequential but physiologically and morphologically ...
Vegetative adults of Acetabularia acetabulum (L.) Silva were studied as a model system for subcellular patterning in plants, and a description of several phenotypic and physiological characteristics that reveal patterns of subcellular differentiation in this unicellular macroalga was undertaken. Initially, calcification patterns were studied. Under favorable conditions, the ...
Biochemical and molecular biological approaches to two anion translocators, a Cl(-)-translocating ATPase and sulfate permease were described for Acetabularia acetabulum, a unicellular marine alga. The primary structures of an almost complete cDNA clone of the 50 kDa subunit and a partial cDNA clone of the 54 kDa subunit of the Cl(-)-ATPase were highly similar to the beta and ...
We observed, after 38 months of follow-up, the rupture of the metallic shell of a Harris-Galante cup implanted in a dysplastic acetabulum augmented with a femoral head autograft. Bone ingrowth was extended to 53% of the porous surface, but only in the areas in contact with the true acetabulum. No bone ingrowth was identified in the fiber mesh in contact ...
With carbon particles we analyzed patterns of growth in Acetabularia acetabulum (Lam.) P.C. Silva, a giant unicell famous for classic development studies. We focused on the stalk apex, which generates the stalk, whorls of hairs, and whorls of gametophores. To gain visual and physical accessibility, we amputated the youngest whorls of hair and the original apex and performed ...
A total of 19 patients (16 males, 3 females) who had fractures of the posterior wall of the acetabulum were treated by open reduction and internal fixation. Their mean age was 40 years. There were five single-fragment fractures and 14 comminuted. Fifteen patients were treated by fixation with cannulated screws only and four were treated with cannulated screws and ...
This study evaluates the accuracy and precision of a skeletal age estimation method, using the acetabulum of 100 male ossa coxae from the Grant Collection (GRO) at the University of Toronto, Canada. Age at death was obtained using Bayesian inference and a computational application (IDADE2) that requires a reference population, close in geographic and temporal distribution to ...
The volatile halogenated methyl ethyl ether, isoflurane, used as an anaesthetic, inhibits actin-based dynamics directly or indirectly in animal cells. In plant cells, most intracellular movements are related to actin pathways. We have used isoflurane in a unicellular alga, Acetabularia acetabulum, to test the dynamics of choloroplast organization. By measuring the delayed ...
* Here we analyzed the shape of the central vacuole of Acetabularia acetabulum by visualizing its development during diplophase (from juvenility through reproduction) and haplophase (from meiosis through mating). * Light microscopy and whole-organism applications of a pH-sensitive dye, neutral red, were used to visualize the anatomy of the central vacuole. We studied ...
Vacuole-rich fractions were isolated from Acetabularia acetabulum by Ficoll step gradient centrifugation. The tonoplast-rich vesicles showed ATP-dependent and pyrophosphate-dependent H(+)-transport activities. ATP-dependent H(+)-transport and ATPase activity were both inhibited by the addition of a specific inhibitor of vacuolar ATPase, bafilomycin B1. A 66 kDa polypeptide ...
The host variability of adults of Phyllodistomum umblae and P. folium in fishes of the Baikal region has been studied. The absence of considerable geographical variability of P. umblae in Coregonus lavaretus (Lake Baikal, Lake Storsj�n in Sweden) has been shown. The complexes of most stable (the size of acetabulum and eggs, location of acetabulum, ovary ...
The acetabular labrum, a fibrocartilaginous structure essential to the proper functioning of the hip joint, may be damaged from a variety of conditions including femoroacetabular impingement. FAI is defined by abnormal contact between the femur and acetabulum and is characterized by an underlying morphological abnormality of the femur (dysplastic bump at the head/neck ...
We studied cartilage degeneration in 45 canine acetabula after implantation of prostheses with articulating surfaces of low-temperature isotropic (LTI) pyrolytic carbon, cobalt-chromium-molybdenum alloy and titanium alloy for periods ranging from two weeks to 18 months. Gross specimens and histological sections were compared with the nonoperated (control) acetabulum of the ...
The embryology and development of the hip joint are complex. In few areas of the body can so many morphological variations be seen. Minor anatomical abnormalities in the acetabular and femoral head shape, femoral�neck angle, and joint congruency, are frequent. Controversies still exist on the importance of these variations and on whether or not they put the patient at risk of developing early ...
A Mg(2+)-ATPase was solubilized from membranes of Acetabularia cliftonii using nonanoyl-N-methylgluconamide and purified by ion-exchange and gel permeation chromatography. One active ATPase fraction after Mono Q chromatography had a specific activity of 10 units/mg of protein. Judged from subunit composition [54 (a), 50 (b) with a fainter band around 40 kDa], catalytic properties, and N-terminal ...
Percutaneous screw fixation of the anterior column of the acetabulum has been a challenging task because of its unique anatomy and a risk of intra-articular penetration. Evidence is lacking for any tools to provide visual scrutiny of fracture reduction and intra-articular screw penetration. We report 2 cases of fracture of the acetabulum that developed in ...
Legg-Calve-Perthes disease develops after interruption of the blood supply to the capital femoral epiphysis. This results in various changes in the femoral epiphysis and metaphysis, the capital femoral epiphysis, growth plate, and the acetabulum. The necrotic bone of the epiphysis is gradually replaced by new bone, and over 2 to 4 years complete healing of the epiphysis ...
The influence of cycling loading force on the substrate made of frozen bone grafts was investigated. Three layers of bone grafts were compacted in a spherical model of hip joint acetabulum and then subjected to a sinusoidal loading force. For each layer a series of N = 30 loading cycles were performed. The least impacted grafts were located in the upper part of the ...
Creptotrema agonostomi n. sp. is described from the mugilid fish Agonostomus monticola from R�o Cuitzmala, Jalisco, east M�xico, from R�o Las Palmas and R�o M�quinas, Veracruz, west M�xico, and from the ictalurid, Ictalurus balsanus from R�o Chontalcoatl�n, Guerrero, east M�xico. It is distinguished from other species of Creptotrema by its small size, large ...
Hip arthroscopy is becoming increasingly popular. A simple, precise, and practical means of recording arthroscopic findings will be useful for diagnostic, research, and audit purposes. Basic principles of cartography exist to produce two-dimensional paper representations of our spherical planet. We used the same principles to produce a two-dimensional map of the acetabulum and ...
With 7 figures and 1 table SUMMARY: The objective of this study was to investigate the anatomy, both macroscopic and microscopic, of the soft tissue internal structures of the hip joint in animal species and in three human hips (an adult and two fetuses). We dissected the hip joints of 16 species and compared the anatomical features of the soft tissue from the respective acetabula. In addition, a ...
An analysis of Homer's Iliad shows that a great number of anatomic references are contained in the text. Anatomic structures mentioned in the poem include: encephalon, spinal cord, trachea, lung, heart, liver, bowel, urinary bladder, tongue, diaphragm, cranial bones, cervical vertebrae, clavicle, acetabulum, ankle joint, aorta and external carotid artery. This suggests that a ...
The Ganz periacetabular osteotomy (PAO) is currently the most popular hip-sparing procedure in adults with acetabular dysplasia. If this procedure fails and a total hip arthroplasty is necessary, spatial reorientation of the acetabulum alters the conditions of implanting the acetabular component of the prosthesis. In our study, we present two cases of total hip arthroplasty in ...
In the treatment of posterior wall fractures of the acetabulum, a modified distal radius T-plate can be substituted for one third tubular spring plates for fixation of thin, small, or comminuted posterior wall fragments. This technique is described as well as a case series of 33 patients with various posterior wall acetabular fractures. PMID:21654532
X-ray findings in the examination of the hips in infants depend upon the position of the infant during the examination. Each of three variables of position, (1) pelvic tilt, (2) abduction of the femurs, and (3) external rotation of the femurs, affects the apparent relation but not the real relation between the acetabulum and the femur.
To determine patient-perceived functional outcome after lower extremity fracture (LEF), a prospective, follow-up study of patients managed at three level 1 trauma centers was conducted. Patients with unilateral LEF involving the acetabulum and distally we...
Large osteoarthritic cysts can sometimes be difficult to distinguish from primary osseous and soft tissue tumours. We present such a case involving a cyst arising from the hip joint and eroding the acetabulum which presented as a soft tissue malignancy referred to a tertiary bone and soft tissue tumour centre. We discuss the diagnostic problems it may pose, and present a ...
BACKGROUND:: The long-term clinical status of surviving patients with multiple injuries has not been well described. The aim of this study was to evaluate the long-term outcome of acetabular and lower limb injuries. METHODS:: Patients treated at a Level I trauma center at least 10 years before participation in this study were invited for a follow-up physical examination. Six hundred thirty-seven ...
OBJECTIVE:: To present clinical, radiographic, and functional outcomes of patients allowed immediate full weightbearing after closed reduction and percutaneous fixation of anterior column component acetabulum fractures. DESIGN:: Retrospective review. SETTING:: Academic Level I trauma center. PATIENTS:: Between September 2001 and December 2008, 28 patients with anterior column ...
The study of acetabular morphology has shown that there are geographic differences in the morphology and prevalence of acetabular dysplasia among different ethnic groups. However, few data exist on the shape of the acetabulum in various populations around the world. In this study, we examined samples of pelvic radiographs from Egyptian adults. Acetabular dysplasia in adults is ...
Name: 1 GEOL 104 Dinosaurs: A Natural History Anatomy and Taxonomy Assignment DUE: Fri. Sept. 29 Part I. Comparative Anatomy Below is the skull of the early primitive meat-eating dinosaur 25) Ulna 26) A Metacarpal 27) A Metatarsal 28) Chevron 29) Acetabulum Extra Credit) This dinosaur
This biographical sketch of M. N. Smith-Petersen corresponds to the historic text, The Classic: Treatment of Malum Coxae Senilis, Old Slipped Upper Femoral Epiphysis, Intrapelvic Protrusion of the Acetabulum, and Coxa Plana by Means of Acetabuloplasty, available at DOI 10.1007/s11999-008-0670-0 . PMID:19132453
Proton-pumping nicotinamide nucleotide transhydrogenase (Nnt) is a membrane-bound enzyme that catalyzes the reversible reduction of NADP(+) by NADH. This reaction is linked to proton translocation across the membrane. Depending on metabolic conditions, the enzyme may be involved in NADPH generation, e.g., for detoxification of peroxides and/or free radicals and protection from ischemic damage. Nnt ...
We developed the acetabular tridimensional memoryalloy fixation system (ATMFS), which is made of NiTi shape memory alloy, according to the specific mechanical properties of biological memory material, NiTi shape memory alloy and measured distribution of contact area and pressure between the acetabulum and the femoral head of cadaveric pelvis. Seven formalin-preserved cadaveric ...
This paper describes several new methods and software for automatic segmentation of the pelvis and the femur, based on clinically obtained multislice computed tomography (CT) data. The hip joint is composed of the acetabulum, cavity of the pelvic bone, and the femoral head. In vivo CT data sets of 60 actual patients were used in the study. The 120 (60 x 2) hip joints in the ...
The unicellular green macroalga Acetabularia acetabulum L. Silva is an excellent system for studying regional differentiation within a single cell. In late adults, physiologically mediated extracellular alkalinity varies along the long axis of the alga with extracellular pH more alkaline along the apical and middle regions of the stalk than at and near the rhizoid. Respiration ...
The unicellular green macroalga Acetabularia acetabulum L. Silva is an excellent system for studying regional differentiation within a single cell. In late adults, physiologically mediated extracellular alkalinity varies along the long axis of the alga with extracellular pH more alkaline along the apical and middle regions of the stalk than at and near the rhizoid. ...
Morphological variations in hip joint anatomy are a possible mechanism for femoroacetabular impingement (FAI) which leads to hip osteoarthritis. Significant geometric variations of the acetabular rim exist between patients including variations in depths of the postereosuperior depression (PSD) and psoas valley (PV). Computed tomographic scans of 48 FAI patients were segmented to create ...
Homeobox-containing genes play developmentally important roles in a wide variety of plants, animals and fungi. As a way of studying how development is controlled in the unicellular green macroalga Acetabularia acetabulum, we used degenerate PCR to clone a knotted1-like (kn1-like) homeobox gene, Aaknox1 (Acetabularia acetabulum kn1-like homeobox 1). ...
Fractures of the acetabulum after low-energy trauma in geriatric patients suffering from osteoporosis are increasing in number and significance due to demographic changes. The results of current therapeutic principles though tend to be poor in this population, while risk and treatment-related morbidity of surgical or conservative approaches are substantial.The treatment of ...
BACKGROUND: The production of a copy of the fracture or a deformity in a bone with a complex geometry can be one of the important applications of the integration between two modern computer-based technologies, reverse engineering (RE) and rapid prototyping (RP). METHODS: This article reviews recent development in this field and present a case series about the use of medical CT/MRI scanning, ...
This paper explores the effect of under-reaming on micromotion at the cup/bone interface of a press-fit acetabular cup. A cadaver experiment was performed on 11 acetabuli implanted with a cementless acetabular cup. The loading profile simulated hip impingement at the extremes of motion and subluxation relocation of the hip joint. Micromotion of each cup was measured in a custom made jig with ...
Abstract. The incidence of iatrogenic peripheral nerve injury during hip arthroplasty procedures has been reported to be between 0.6 and 1.3 percent. The relative risk of nerve palsy is higher in certain groups of patients such as women, patients with developmental dysplasia of the hip, and those who have undergone revision arthroplasty. In this study, the dynamic relationship between the ...
Minimally invasive procedures such as percutaneous cementoplasty can provide immediate pain relief and can restore mechanical stability for patients with bone metastases who are not candidates for surgery or who show resistance to radiotherapy or analgesic treatment. Here, we examine a case of percutaneous cementoplasty to treat a lytic lesion of the acetabulum from breast ...
The improved reconstitution of the Mono Q-III fraction, a Cl(-)-translocating ATPase, isolated from Acetabularia acetabulum (Ikeda et al. (1990) Biochemistry 29, 2057-2065) into liposomes rendered transport properties of this enzyme clear. The liposomes were prepared by the reversed-phase method using egg lecithin and cholesterol in a molar ratio of 2:1 and the purified ATPase ...
Femoroacetabular impingement is considered a cause of hip osteoarthrosis. In cam impingement, an aspherical head-neck junction is squeezed into the joint and causes acetabular cartilage damage. The anterior offset angle ?, observed on a lateral crosstable radiograph, reflects the location where the femoral head becomes aspheric. Previous studies reported a mean angle ? of 42� in asymptomatic ...
A simple hip dislocation is one without fracture of the proximal femur or acetabulum. Complex fracture-dislocations involve the acetabulum, femoral head, or femoral neck. The incidence of posttraumatic arthritis is much lower in simple dislocations than in fracture-dislocations. The most common mechanism of injury is a high-energy motor vehicle accident, ...
PURPOSE: In reconstruction of congenital hip dislocation by total hip arthroplasty (THA), positioning of the acetabular component in the true acetabulum is sometimes accompanied by shortening of the femur. Shortening of the femur is of importance for minimising risk of damaging neurovascular structures due to excessive limb lengthening. Furthermore, reduction of the femoral ...
Cement extrusion into the pelvis with subsequent palsy of the obturator and femoral nerves is a rare entity after hip replacement surgery. Cemented fixation of the acetabular cup has been considered as a safe and reliable standard procedure with very good long term results. We present a case of fifty year old female patient after hip arthroplasty procedure which suffered an obturator and femoral ...
High-porosity "cancellous metal" coatings have been introduced to increase the fixation and biologic incorporation of acetabular cups. The strength of initial fixation provided by a cancellous metal cups vs conventional alternatives in the deficient revision acetabulum was investigated. Cancellous, plasma-sprayed, and beaded cups (n = 9) were implanted under controlled ...
The developmental dysplasia of the hip (DDH) is a congenital malformation affecting the proximal femurs and acetabulum that are subluxatable, dislocatable, and dislocated. Early diagnosis and treatment is important because failure to diagnose and improper treatment can result in significant morbidity. In this paper, we designed and implemented a computer aided system for the ...
Developmental dysplasia of the hip (DDH) is a spectrum of disease starting in childhood and in many cases persisting into adulthood. The spectrum ranges from acetabular dysplasia, through hip subluxation to dislocation. The aim of this research was to determine the prevalence and pathoanatomy of acetabular dysplasia and subluxation in excavated human skeletal remains, to complement past research ...
There is a consensus among researchers that the treatment for Legg-Calv�-Perthes disease, whether conservative or surgical, is always based on the concept of "containment," that is, maintaining the femoral head inside the acetabulum socket throughout the entire evolution of the disease. Thus, the size and shape of the proximal femoral epiphysis should be monitored during the ...
Forensic anthropologists frequently use measurements of the human skeleton to determine sex and ancestry. Since the establishment of the Daubert criteria of admissibility of scientific evidence to court, methodologies used by anthropologists came under severe scrutiny. It is therefore important to ensure that the osteometric standards that are used in skeletal analyses are clearly explained, ...
Thyroid cancer rarely metastasizes to the pelvis. We report a case where the metastasis was found two years before the thyroid cancer. Treatment included initial surgery with resection of the metastatic tumor and reconstruction of the acetabulum with bone cement, and secondly total thyroidectomy, node dissection and I131. Surgical treatment of locoregional recurrence had no ...
Open reduction with internal stabilization is considered to be the standard therapy for the treatment of displaced acetabular fractures. The internal fixation is routinely achieved by the use of plates and screws. The use of cerclage wires and cables as a reduction aid and definitive implant for stabilization has only occasionally been reported in the literature. The indication was mostly limited ...
Failure of the enlarged and deformed anterolateral portion of the femoral head to roll into the acetabulum during abduction alters hip joint mechanics. The resultant hinge abduction is associated with pain, and the patient often has restricted movement. A valgus osteotomy removes the deformed portion of the femoral head away from the weight-bearing area and ensures there is ...
The teardrop shadow of the pelvis is poorly understood and as a result its clinical significance is not appreciated. The structure responsible for this shadow was pinpointed by removing sections from the hemipelvis of an anatomic specimen with an electric saw. This structure is located in the anteroinferior portion of the acetabular fossa at the acetabular notch and consists of cortical and ...
The surgical approach is an important element in the quality of total hip replacement. Adequate surgical exposure based upon thorough fundamental knowledge of anatomy facilitates surgery and ensure optimum results in total hip replacement. Several surgical exposure techniques are utilized and have been described in the literature; all stress the importance of visualization of the ...
Philophthalmus aweerensis, a new eye fluke species, was discovered in the conjunctival cavities of a rhea in the UAE. This fluke was described and differentiated from other eye flukes that had been found in birds in the Middle East such as Philophthalmus palpebrarum, Philophthalmus nocturnus, Philophthalmus gralli, Philophthalmus lucipetus, Philophthalmus distomatosa, and Philophthalmus hegeneri. ...
A new genus, Oswaldotrema gen. nov. is proposed. Oswaldotrema nacinovici sp. nov. is descibed from Numenius phaeopus Latham, 1790. Differentiation from the other related genera, namely Philophthalmus, Pygorchis, Proctobium, Parorchis, Echinostephila, Cloacitrema, Pittacium, Ophthalmotrema, Skrjabinovermis and Paratrema, was based on morphological characters, mainly on those referring to the body ...
Surgical treatment of a unusual acetabular fracture is described. This fracture was characterized by impaction and breaking down of the posterior articular surface and comminution of lamina quadrilatera lower portion, without cortical fracture of both columns. The fracture was treated surgically through the Kocher-Langenbeck approach. A small hole was created in the acetabulum ...
Musculoskeletal injuries secondary to seizures are well documented and have a variable incidence. Meperidine (Demerol [Abbott, Abbott Park, IL]) has been used for many years in the postoperative setting for pain control; however, in high doses, it has been associated with seizure. We report the case of patient who experienced a tonic-clonic seizure 5 days after hip revision surgery, resulting in ...
A chronic slip of the upper femoral epiphysis (also called by the authors inveterate epiphysiolysis) is a rare, but not an extremely rare, occurrence. This paper describes a simple linear intertrochanteric osteotomy which aims to centre the femoral head correctly in the acetabulum. A deformity in the sagittal plane alone or a combined deformity in the sagittal and frontal ...
The iliopsoas tendon can interpose between the femoral head and the acetabulum, preventing reduction or stability of reduction of a dislocated hip by a closed method. The tendon produces an infolding of the capsule and labrum. This infolding of the capsule and labrum creates an ''isthmus'' between the capital and the acetabular parts of the ...
Well-expressed endogenous circadian rhythms in Acetabularia acetabulum were spectrally analyzed and recorded in time-period distributions. The stability of the circadian periods under constant conditions and their changes could be monitored continually in step sizes close to the circadian period length. The resolution of period estimates of the circadian component was ...
The function of the translation product of cDNA for Acetabularia vacuolar H(+)-pyrophosphatase was examined using the Saccharomyces cerevisiae VMA3-deficient strain. The open reading frame of Acetabularia H(+)-pyrophosphatase was revealed to encode 751 amino acids (721 or 751 amino acids in a previous paper). The acidification of the vacuole was observed by fluorescence microscopy when the cDNA ...
The objective of containment treatment in Perthes disease is to hold the femoral head in the acetabulum during the period of "biologic plasticity" while necrotic bone is resorbed and living bone is restored through the process of "creeping substitution." This article identifies the various methods of containment and the technical aspects of each method. Choice of method ...
The first and only description of percutaneous cementoplasty, to date, has been described in the French medical literature in 1994. In this series of 12 cases, radiologists successfully instilled a cement derivative into the acetabulum under fluoroscopic control. As in these cases, the major indication for cementoplasty is to provide pain control and stabilization of an ...
We isolated several spontaneous phenotypes in the giant unicell Acetabularia acetabulum that have vegetative terminal morphologies. Because they arrest in vegetative development, these cell lines are effectively immortalized. However, they had to be rescued before they could be studied via classical genetics because no heterozygotes from the original self-crosses were found, ...
Untreated hip joint in cerebral palsy children leads to subluxation or dislocation caused by muscle imbalance often with associated painful arthritis. The very strong hip joint flexors and adductors muscles overpower the abductors and extensors muscles, moving the hip joint's rotation center to shift from center of the femoral head to the lesser trochanter. The forces gradually change the shape of ...
The genes possibly encoding the b subunit (50 kDa) of the Cl(-)-translocating ATPase of Acetabularia acetabulum were cloned from total RNA and from poly(A)+ RNA and sequenced. The deduced amino acid sequence of the open reading frame consisted of 478 amino acids and showed high similarity to the beta subunit of chloroplast F1-ATPase. Gene fragments encoding the putative beta ...
The systematics of the green algal class Ulvophyceae have been difficult to resolve with ultrastructural and molecular phylogenetic analyses. Therefore, we investigated relationships among ulvophycean orders by determining the distribution of two discrete genetic characters previously identified only in the order Dasycladales. First, Acetabularia acetabulum uses the core ...
The etiology of osteoarthritis of the hip has long been considered secondary (eg, to congenital or developmental deformities) or primary (presuming some underlying abnormality of articular cartilage). Recent information supports a hypothesis that so-called primary osteoarthritis is also secondary to subtle developmental abnormalities and the mechanism in these cases is femoroacetabular impingement ...
INTRODUCTION: The Burch-Schneider cage is an established implant in revision surgery after hip arthroplasty that is used for reconstructing osseous defects in the acetabulum. However, there are only a few reports about the use of cages in patients with metastatic destruction of the acetabulum. The aim of this retrospective study was to assess the outcome ...
BACKGROUND: Tears of the acetabular labrum can lead to pain, disability, and osteoarthritis. Several pathomechanisms have been proposed, including femoroacetabular impingement (FAI). Labral tears have been reported to occur in the presence of even subtle deformities of the acetabulum and femoral head-neck junction. QUESTIONS/PURPOSES: We analyzed the association of the extent ...
Developmental dysplasia of the hip is a congenital hip joint malformation affecting the proximal femurs and acetabulum that are subluxatable, dislocatable, and dislocated. Conventionally, physicians made diagnoses and treatments only based on findings from two-dimensional (2D) images by manually calculating clinic parameters. However, anatomical complexity of the disease and ...
Acetabularia rhodopsins are the first microbial rhodopsins discovered in a marine plant organism, Acetabularia acetabulum. Previously, we expressed Acetabularia rhodopsin II (ARII) by a cell-free system from one of two opsin genes in A. acetabulum cDNA and showed that ARII is a ...
BackgroundCotyloplasty is a technique that involves making a perforation of the medial wall of a shallow acetabulum and then inserting an acetabular cup with the medial aspect of its dome beyond the Kohler line. The purpose of this study was to evaluate the results of cementless total hip arthroplasty (THA) using cotyloplasty with focusing on the amount of medial cup ...
Amputated apices from vegetative wildtype cells of the uninucleate green alga Acetabularia acetabulum can differentiate a reproductive structure of 'cap' in the absence of the nucleus (H�mmerling, J. (1932) Biologisches Zentralblatt 52, 42-61). To define the limits of the ability of wildtype cells to control reproductive differentiation, we determined when during development ...
PURPOSE: Periacetabular osteotomies are a family of surgical procedures used to treat hip dysplasia. In a periacetabular osteotomy, the operating surgeon aims to increase acetabular coverage of the femoral head. The surgical correction has mechanical goals of increasing the stability of the joint and to improving the pressure distribution across the acetabulum. Although it is ...
Objective: The aim of this study was to evaluate the accuracy of a novel 3-dimensional (3D) fluoroscopic navigation system using a flat-panel detector-equipped C-arm, focusing on the influence of the distance from the center of fluoroscopic imaging on navigation accuracy. Materials and Methods: A geometric phantom was made using a Styrofoam cube with 25 markers, each consisting of a metal ball ...
Background and purposeOur aim was to assess in an animal model whether the use of HA paste at the cement-bone interface in the acetabulum improves fixation. We examined, in sheep, the effect of interposing a layer of hydroxyapatite cement around the periphery of a polyethylene socket prior to fixing it using polymethylmethacrylate (PMMA).MethodsWe performed a randomized study ...
The implantation of an endoprosthetic socket into the acetabulum alters the mechanical stresses in the periacetabular region in a significant manner compared with the natural hip joint. In this way, a remodelling process is initiated. Primary stability to achieve osseointegration and a loading of the acetabulum owing to the biomechanical interaction ...
The gene encoding the b subunit of the Cl(-)-translocating ATPase (aclB) was isolated from total RNA and poly(A)+ RNA of Acetabularia acetabulum and sequenced (total nucleotides of 3038 bp and an open reading frame with 478 amino acids). The deduced amino acid sequence showed high similarity to the beta subunit of the F type ATPases, but was different in the N-terminal 120 ...
Femoro-acetabular impingement is an anatomical disturbance of the hip, caused by a deformity of the acetabulum, femur or both that causes an abnormal contact between both structures during certain movements. Its prevalence is 10 to 15% and causes chronic inguinal pain. It can be confused with several other causes of inguinal pain such as hernias, facet syndromes, a renal ...
At 53 hip joints a cupshell developed by L. Spotorno was practiced as replacement for the acetabular joint surface. This cementless CLS expansion-shell was always in combination with an also cementless femoral prosthesis applied in case of medial femur neck fractures, coxarthrosis, or the exchange operation to implantation. The concept of this prosthesis-shell performs the elastic- and mechanical ...
A granulomatous reaction to the small particles worn off from an implanted prosthesis is a common complication in arthroplasty. The chronic inflammatory response to the wear debris from either the polyethylene or the metal components is thought to be responsible for osteolysis, implant loosening, and finally mechanical failure. Formation of an extra-articular granulomatous tissue mass is uncommon, ...
Evidence of disease was analyzed from the skeletal remains of 11 individuals dating to the post-Medieval period from church cemetery of St. Ilija in Serbia. Two individuals showed pathological condition affecting joints. It was supposed that first individual had been suffering from Legg-Calv�-Perthes disease. It seems that this condition remained untreated, with extensive bone remodeling, and ...
A 16-year-old man had a traumatic accident during motor-cross racing and sustained an anterior hip dislocation with fracture of anterior superior and anterior inferior iliac spines. The hip was emergently reduced and further imaging was obtained to evaluate the lesion and bony fragments. Computed tomography confirmed the presence of two large fragments and a small fragment from the antero-inferior ...
The value of magnetic resonance imaging (MRI) for assessment of the hip has been demonstrated, particularly in cases of avascular necrosis. Magnetic resonance imaging can be used to provide anatomic evaluation of the femoral head, acetabulum, hip joint, joint fluid, and the surrounding structures. MR examinations of two patients with hip fractures fixed with stainless steel ...
The human hip is subjected to several hundred million loading cycles during a lifetime. Hip instability and femoro-acetabular impingement cause damage to the rim of the acetabulum. The acetabular rim is a highly specialized structure known as the labro-acetabular complex. A unidirectional flow of synovial fluid has been identified in this region. The synovial fluid circulation ...
The case of a 64-year-old male patient who presented with a bulky osseous tumor metastasis from renal cell carcinoma is reported. The metastatic lesion extended from the acetabulum of the left iliac bone into the iliosacral joint.Treatment plan included selective arterial embolization followed by transdermal radiofrequency ablation, followed by consolidation irradiation. This ...
Hinge abduction occurs early in the fragmentation stage of Legg-Calv�-Perthes disease and should be suspected when abduction and internal rotation are lost. It can be confirmed by an AP radiograph in abduction and internal rotation in which the ossific nucleus is not covered by the acetabulum. An arthrogram can then yield greater information regarding the reversibility of ...
S-(1,2-Dicarboxyethyl)glutathione (DCE-GS) was found in Saccharomyces cerevisiae, but not in bacterial species nor in a unicellular alga (Acetabularia acetabulum). The enzyme that catalyzes condensation of L-malate and glutathione (GSH) to form DCE-GS was partially purified from baker's yeast. It had a molecular mass of 49 kDa and was monomeric and the Km values were 2.2 and ...
Retained foreign bodies after surgery have the potential to cause serious medical complications for patients and bring fourth serious medico-legal consequences for surgeons and hospitals. Standard operating room protocols have been adopted to reduce the occurrence of the most common retained foreign bodies. Despite these precautions, radiolucent objects and uncounted components/pieces of ...
Psoas abscess (PA) is an uncommon disease and its diagnosis is difficult. It can be primary or secondary. Primary abscesses are of unknown origin and are presumably caused by haematogenous or lymphatic spread from a distant infectious focus. Secondary PA is caused by spreading from a contiguous infected structure, such as vertebrae (espondilodiscitis) or mesenteric abscesses (Crohns disease). PA ...
An idealized axisymmetric finite element model of the acetabulum and acetabular implant was analyzed. The assembly strains induced in the bone by the press fit insertion of an oversized cementless acetabular implant were examined. The interaction between implant and bone was modeled as a nonlinear contact-coupled interface to simulate the actual process of press fitting the ...
Five patients underwent preoperative embolization of osseous metastases from renal cell carcinoma. The group consisted of four men and one woman who ranged in age from 46 to 79 years. The lesions were located in the pubic ramus and acetabulum, proximal femur, femoral midshaft, proximal humerus, and proximal tibia. All embolizations were performed within 24 hours of surgery. ...
In 15 documented cases, subluxation or dislocation of the hip was discovered months or years after previous multiple normal physical examinations. The examiners were unique in that six were professors specializing in childrens' orthopedics, four were board-certified orthopedists, and five were pediatricians. An increased acetabular index, subluxation, and early dislocation may not always be ...
The reproductive cap of the giant single-celled alga Acetabularia mediterranea (or A. acetabulum) has rays tapering from a width of about 400 microns at the circumference of the cap to about 30 microns at their junction with the stalk of the cell. This is ideal geometry for testing the current limits of spatial resolution of proton magnetic resonance imaging. In this work, ...
Abnormalities of femoral neck version have been associated with a number of hip abnormalities in children, including slipped capital femoral epiphysis, proximal femoral focal deficiency, coxa vara, a deep acetabulum and, rarely, developmental dysplasia of the hip. Orthopedic surgeons also are interested in quantifying the femoral neck anteversion or retroversion in children ...
The language spoken by orthopaedic surgeons is filled with eponyms. In orthopaedics, perhaps more than any other medical specialty, we speak cryptically to one another using code words and other secret language. Certain hyphenated eponyms are of particular interest because they pique one's curiosity as to how these people came to be partners in orthopaedic history. In this paper, we offer some ...
A low-friction bipolar endoprosthesis was implanted in 200 patients. The primary indications for the procedure were acute fractures or failed internal fixation of the hip. The prosthesis was also implanted in a smaller series of patients who presented with pathologic lesions of the femoral head and minimal involvement of the acetabulum. Intrahospital results proved the ...
Unstable intertrochanteric and subtrochanteric fractures historically have been prone to inferior displacement of the femoral head as well as varus collapse. Efforts to mitigate these untoward outcomes have led to the evolution of the Trochanteric Fixation Nail (TFN) with its helical spiral blade. The TFN has many proposed advantages such as simplified insertion, less hardware, and improved ...
ABSTRACT: Osteogenesis imperfecta is a genetic disorder characterized by increased susceptibility to fractures and vascular injuries due to connective tissue fragility. In this case report, we present a patient with osteogenesis imperfecta type I who sustained a transverse fracture of the right acetabulum while transferring from bed to chair. The fracture was repaired through ...
Osteogenesis imperfecta is a genetic disorder characterized by increased susceptibility to fractures and vascular injuries due to connective tissue fragility. In this case report, we present a patient with osteogenesis imperfecta type I who sustained a transverse fracture of the right acetabulum while transferring from bed to chair. The fracture was repaired through an ...
From a group of 643 total hip arthroplasties, 98 patients required trochanteric osteotomies, and in 68 the trochanteric osteotomies were repaired with the Dall-Miles cable grip system (Howmedica, Rutherford, NJ). Trochanteric nonunion occurred in 17 of these patients (25%), with fraying and fragmentation of the cable present in 15 (88%). Of the 51 patients with radiographic union, 18 (35%) also ...
Although the etiology of Perthes disease remains unknown 100 years after its first description, there are many articles that describe the disease course, final outcome, and results of treatment. A system of classification of the extent and severity of the disease is essential to understanding variability of Perthes, and along with the age of the patient when first affected, is useful in predicting ...
Hip arthroscopy has become increasingly popular over the past several years as the techniques have evolved to be able to address both the peripheral and central compartments of the hip. The main indications for hip arthroscopy 10 years ago were diagnostic and debridement procedures such as removal of loose bodies, labral resection, synovectomy, and cartilage debridement. Advances in this field ...
Acetabular reconstruction after resection of advanced periacetabular metastatic lesion is a complex undertaking. Harrington (J Bone Joint Surg [Am]. 1981;63-653) described a reconstructive technique in class III- and IV-type resections using threaded Steinmann pins and acrylic cement. This technique, although effective for pain relief and restoration of function, is traditionally considered when ...
The aim of this experimental study was to analyse the effects of implant design and bone stock defects on the primary stability of three different acetabular components. Fresh frozen human pelves were employed for the investigation. M�ller and Ganz rings and a Burch-Schneider cage (Protek, M�nsingen, Switzerland) were fixed with screws in 6 normal acetabula using standard techniques, and in 30 ...
PURPOSE: Recently, acetabular labral tears were recognized as a source of hip pain. Most of these tears were found to be localized at the chondrolabral junction. The purpose of this study was to evaluate the chondrolabral junction in reference to its collagen fiber orientation and its vascularity, which might be used to explain the preponderance of labral tears. METHODS: Eighteen formalinized ...
Objective: To describe a surgical technique for reinforced augmentation of the dorsal acetabular rim (DAR) using a string-of-pearls (SOP(�) ) locking plate and polymethylmethacrylate (PMMA) bone cement, and to report clinical outcome in 7 dogs. Study Design: Case series. Animals: Dogs (n=7). Methods: Medical records (November 2009-April 2010) of 7 dogs with large DAR deficits, that had total hip ...
At reproductive onset the marine green alga Acetabularia acetabulum (L.) P.C. Silva redirects growth from vertical elongation of the axis of the plant to lateral expansion of a disk-shaped reproductive structure, the "cap." We used amputation to synchronize cap initiation and to facilitate investigation of the light requirements during amputation-induced cap initiation. ...
Although few studies address the use of three-phase bone scanning (TPBS) and indium-111-labeled white blood cell scintigraphy ({sup 111}In-WBC) in hip arthroplasty utilizing a porous-coated prosthesis, the literature suggests that scintigraphic patterns in the uncomplicated patient may differ from that seen with the cemented prosthesis. In an attempt to determine the scintigraphic natural history, ...
Although the Dasycladalean alga Acetabularia acetabulum has long been known to contain mannan-rich walls, it is not known to what extent wall composition varies as a function of the elaborate cellular differentiation of this cell, nor has it been determined what other polysaccharides accompany the mannans. Cell walls were prepared from rhizoids, stalks, hairs, hair scars, ...
BackgroundSevere acetabular deficiencies in cases of developmental dysplasia of the hip (DDH) often require complex reconstructive procedures in total hip arthroplasty (THA). The use of autologous femoral head grafts for acetabular reconstruction has been described, but few data is available about clinical results, the rates of non-union or aseptic loosening of acetabular components.MethodsIn a ...
Although technetium diphosphonate (TcMP) and Indium-111 white blood cell labeled (Ind-WBC) imaging are reported useful in identifying aseptic and septic loosening in cemented hip arthroplasty, their usefulness has not been identified in uncemented porous coated hip arthroplasty. We attempted to define the natural history of TcMP and Ind-WBC imaging in primary P.C.A. uncemented total hip ...
In Japan, the main reason for osteoarthritis of the hip joint is caused by dysplastic deformities. The implantation technique of cementless press-fit cup with multi-screw fixation and acetabular bone graft to reconstruct the true acetabular center is described. In addition, special design aspects of the BiCONTACT-N stem were optimized for these patients. Between January 1997 and December 1999, 29 ...
The discovery of a largely complete and well preserved specimen of Poposaurus gracilis has provided the opportunity to generate the first phylogenetically based reconstruction of pelvic and hindlimb musculature of an extinct nondinosaurian archosaur. As in dinosaurs, multiple lineages of basal archosaurs convergently evolved parasagittally erect limbs. However, in contrast to the laterally ...
Ultraweak photon emission of dark-incubated A. acetabulum cells were measured with the use of a sensitive electronphotomultiplier of the Hamamatsu 550 type. The photon count series were subjected to Fourier analysis for 2-1020 sec period range. The average level of photon emission in samples containing 50 cells was approximately. 40% above background. Cell cultures were ...
Hip joints (280) from 140 human fetuses, obtained from abortions and deaths in the perinatal period, were studied. The fetuses ranged from 8.7 to 40 cm in crown-rump length and are believed to be between 12 and 42 weeks in age. The joints were dissected, morphology inspected, and measurements taken of the depth and diameter of the acetabulum, the diameter of the femoral head, ...
A retrospective/prospective radiographic study documented 55 cases of moderate to severe hip dysplasia, with varying degrees of shallowing of the acetabulum, flattening or loss of the femoral head, widening or loss of the femoral neck, and femoral diaphyseal abnormalities in northern koalas (Phascolarctos cinereus) in the San Diego Zoo (San Diego, California, USA) collection. ...
In order to determine the magnitude of temperature increases in resurfaced hips, temperature sensors were placed percutaneously in both hip joints of 12 volunteer patients who had 1 or both joints resurfaced. Temperature recordings were made with patients at rest (baseline) and after patients walked for 20 and 60 minutes. The hip resurfacing procedures were performed 12 to 36 months prior to this ...
Effects on morphology and microfilament structure caused by phalloidin, phallacidin, and some semisynthetic phalloidin derivatives were studied in vegetative cells of the green alga Acetabularia acetabulum (L.) Silva. All phalloidin derivatives (except for phalloidin itself) caused growth stop of the alga after 1 day and (except for the fluorescein-labeled phalloidin) death of ...
The unicellular green alga Acetabularia acetabulum has proven itself to be a superior model for studies of morphogenesis because of its large size and distinctive polar morphology. The giant cell forms an elongated tube (a stalk of up to 60 mm in length), which at its apical pole makes whorls of hairs, followed by one whorl of gametophores in the shape of a cap. At its basal ...
Acetabularia rhodopsin (AR) is a rhodopsin from the marine plant Acetabularia acetabulum. The opsin-encoding gene from A. acetabulum, ARII, was cloned and found to be novel but homologous to that reported previously. ARII is a light-driven proton pump, as demonstrated by the existence of a photo-induced current through Xenopus oocytes expressing ARII. The ...
The radiographs of all patients admitted to the Naval Hospital, Oakland with the diagnosis of pelvic trauma from 1981 through 1985 were reviewed. Thirty-one patients sustained single or double vertical ring fractures. Fifteen of these patients underwent both plain radiography and Computerized Axial Tomographic (CAT) scans in the evaluation of their pelvic injuries. The CAT scans of these pelvic ...
ATPases were isolated from chloroplasts of the unicellular marine alga Acetabularia acetabulum. Two preparations of ATPase, a chloroplast-enriched fraction and an alpha beta gamma-complex were compared. The alpha beta gamma-complex was released into an EDTA solution and purified by anion-exchange chromatography, hydrophobic chromatography, and gel permeation chromatography. ...
BackgroundWe performed a retrospective study to evaluate the results of acetabular circumferential medial wall osteotomy, a procedure designed to provide secure fixation of a cementless hemispherical acetabular cup for the sequelae of septic arthritis of the hip.MethodsWe assessed 38 total hip arthroplasties (THAs) with circumferential acetabular medial wall osteotomies performed on patients with ...
Cement pressurisation is an important step in total hip arthroplasty that determines the long-term integration at the cement-bone interface. Our aim was to evaluate the performance of a new pressuriser designed by us against the standard existing pressurisers in an in vitro experimental set-up using two parameters: cement penetration and cement pressurisation. A polypropylene cup model was ...
The authors assessed 40 hips in 36 patients where a bulk femoral head autograft was used to supplement deficient acetabulum while performing Charnley low-friction arthroplasty. The majority of the hips were congenitally dysplastic or dislocated with secondary arthritis. The average age at surgery was 47.5 years and the average follow-up period was 4 years. The graft provided a ...
Background and purpose Healing of acetabular bone grafts may be difficult to assess in conventional radiographs. We used PET to analyze healing of morselized bone allografts, impacted in large osteolytic acetabular defects at revision arthroplasty.Patients and methods 7 cases had a cup revision because of loosening, with repair of a segmental defect using a perforated, wide and thin plate. The ...
We present a novel arthroscopic-assisted technique to graft chondral defects and subchondral cysts of the acetabular socket using a synthetic osteochondral plug. Four patients with groin pain,solitary cysts in the roof of the acetabulum and radiographic evidence of early osteoarthritis were treated. A bone tunnel was prepared from the region of the iliac crest to the ...
We present a novel arthroscopic-assisted technique to graft chondral defects and subchondral cysts of the acetabular socket using a synthetic osteochondral plug. Four patients with groin pain, solitary cysts in the roof of the acetabulum and radiographic evidence of early osteoarthritis were treated. A bone tunnel was prepared from the region of the iliac crest to the ...
PURPOSE: Acetabular orientation is important to consider in hip joint pathology and treatment. This study aims to describe the functional orientation of the acetabulum as a representative measure of force transmitted through the hip joint generated from bone density mapping and compare it to landmark-based anatomical orientation measures. METHODS: CT scans of 38 non-pathologic ...
Abstract: There is sometimes uncertainty concerning the correct socket position prior to total hip arthroplasty (THA). We conducted a study to determine the hip centre in Japanese women in order to define the true anatomical position of the acetabulum. The study involved 200 consecutive female patients in whom the contralateral hip joint was normal or was prearthritic and who ...
OBJECTIVES:Our primary aim was to compare the long?term survivorship rates and the rates of successful osseointegration between two different types of uncemented acetabular components.INTRODUCTION:Two types of alloys have primarily been used for the manufacture of the uncemented acetabular components: titanium?based and cobalt?based alloys. A titanium?based alloy appears to be more effective with ...
The Mono Q-III fraction, a Mg2(+)-ATPase, isolated from Acetabularia acetabulum was reconstituted into liposomes of various net charges prepared by the reversed-phase method and tested for a Cl(-)-translocating activity. The liposomes from a mixture of egg lecithin, dicetyl phosphate, and cholesterol (63:18:9 mole ratio, negative liposomes) and from a mixture of egg lecithin ...
ATPases were solubilized from membranes of Acetabularia acetabulum using nonanoyl-N-methylgluconamide and purified by ion-exchange and gel permeation chromatography. Three fractions of ATPase, Mono Q-I, -II, and -III, were separated. Activity in fraction Mono Q-I was very labile and could not be accurately determined. Fractions Mono Q-II and -III had specific activities of 0.6 ...
Interventional radiology has made great progress during the past decade. In thoracic oncology image guided, percutaneous procedures may be divided into two groups: diagnostic and therapeutic. The routinely performed diagnostic procedures include percutaneous biopsy of parenchymal and mediastinal lesions under fluoroscopic or CT guidance. The therapeutic procedures are mainly concerned with the ...
Graf's method is a successful procedure for the diagnostic screening of developmental dysplasia of the hip. In a defined 2-D ultrasound (US) scan, which virtually cuts the hip joint, landmarks are interactively identified to derive congruence indicators. As the indicators do not reflect the spatial joint structure, and the femoral head is not clearly visible in the US scan, here 3-D US is used to ...
Total hip replacement is considered to be a highly successful and routine surgery; however, the internal components produce particles through friction and wear in the device. These particles are identified as one of the main reasons for total hip revisions. The generated, biologically active, particles provoke the formation of osteolytic areas through the inhibition of bone formation and increased ...
The major failure mode of cemented or noncemented acetabular fixation is osteolysis produced by biologic reaction to polyethylene and metallic debris. A monoblock acetabular noncemented component offers advantages in reducing the failure mechanism of acetabular cups. First, there is no extra-articular back surface polyethylene wear. Second, locking rings that may generate metallic debris are ...
Purpose: There is an association between winter birth and developmental dysplasia of the hip, formerly termed congenital dislocation of the hip. The purpose of this study was to clarify the relationship between the month and season of birth and hip osteoarthritis in Japanese patients who had undergone total hip arthroplasty or transpositional osteotomy of the ...
Osteoblastoma (OB) and osteoid osteoma (OO) are benign bone-forming tumors frequently involving vertebrae and long bones of the extremities. Because of their similar histopathological features, distinction between OB and OO is mostly based on size criteria. CT and MRI represent the cornerstone of noninvasive diagnostic procedures, as they provide excellent morphologic details and often obviate the ...
Himasthla limnodromi n. sp. is described from short-billed dowitchers, Limnodromus griseus, from the Araya Peninsula, Venezuela, and Delaware Bay, U.S.A. Himasthla limnodromi was not found in dowitchers on the breeding grounds or on the fall staging grounds in the Bay of Fundy but reappeared in dowitchers on the wintering grounds in the fall. This suggests that H. limnodromi is acquired by the ...
Metacercariae of Bolbophorus species are serious pathogens of farmed fish. Molecular diagnostic tools, capable of identifying and differentiating these parasites, may assist in the development of rationale control strategies. The rDNA 18S (small sub-unit: SSU) genes of adult B. confusus and B. levantinus obtained from a pelican, Pelecanus onocrotalus, and a night heron, Nycticorax nycticorax, ...
For the proper diagnosis or treatment of hip joint disorders caused by anatomical abnormalities, the normal hip joint morphology must be studied to understand its influence on the maximum range of motion (ROM) until bony impingement by focusing on gender differences. Acetabular and femoral morphologies were analyzed from 3D CT images of 106 normal hip joints from elderly men (n = 36 joints) and ...
Superolateral acetabular bone defect is a serious challenge in uncemented total hip arthroplasty for acetabular dysplasia. We report a bulk bone autografting technique without decortication of the acetabulum and femoral head contact surfaces in 22 joints. Mean follow-up time was 8.3 years, and survival rates were 100% for loosening and revision end points. The preoperative ...
The use of binary thresholding for segmenting bone structures on spiral computed tomography images is negatively influenced by partial volume effects (PVEs) induced by the image acquisition. PVE leads to mixed voxels, making the binary decision "bone" or "nonbone" a difficult one to take. As a result, two distinct bone structures that are close to each other will often appear to be connected by ...
Plagioporus kolipinskii n. sp. (Trematoda: Opecoelidae) is described from the intestine of the threespine stickleback, Gasterosteus aculeatus L., from Lobos Creek, a freshwater stream in Presidio, San Francisco County, California. Plagioporus kolipinskii is morphologically somewhat similar to 4 (P. serotinus , P. angusticollis , P. macrouterinus , and P. shawi []) of the 12 currently recognized ...
