Fifty-three patients (54 hips) treated with cemented total hip reconstruction with the aid of an acetabular mesh made of Vitallium (Howmedica Inc., Rutherford, New Jersey), a cobalt-chrome molybdenum alloy, to reinforce the medial cement for deficient bone stock in the central acetabular region, were evaluated at an average follow-up ...

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 ...

Reinforcement cages are widely used for the treatment of large acetabular bone defects. We report the case of a loosened Burch-Schneider reinforcement ring causing a recurrent macrohaematuria due to a perforation of the urinary bladder. After performing several diagnostic procedures, the patient underwent interdisciplinary revision ...

BackgroundLoosening of acetabular components often leads to bony defects. Management of extensive acetabular bone loss in hip revision arthroplasty can be a tremendous challenge.Questions/purposesWe asked whether a reconstruction with impacted bone grafts will provide a durable and pain-free ...

We report the results of 24 acetabular reconstructions in which cemented polyethylene cups and tamped corticocancellous allografts were used for severe acetabular bone deficiency. Eleven hips had type-II (cavitary) bone deficiency and 13 had type-III (combined) defects. At a mean follow-up of ...

Migration of total hip arthroplasty components is generally associated with a medial acetabular wall defect and may cause various intrapelvic complications. This is often a result of the destructive bone loss that takes place with infection. To our knowledge, this is the first report that presents complete intrapelvic migration of a ...

BackgroundEvidence suggests a growing incidence of revision total hip arthroplasty (THA) including a subset with large acetabular defects. Revision THA for severe acetabular bone loss is associated with a relatively high rate of mechanical failure.Questions/purposesWe questioned whether cementing a cage to the ...

PURPOSE: The purpose of this study was to investigate the mid-term results of 32 acetabular reconstructions performed using a Kerboull-type acetabular reinforcement device and bone graft between June 1997 and January 2009. METHODS: The mean age of the patients at the time of surgery was 71.4 years (range 55-85). Patients were ...

Massive acetabular bone loss (more than 50% of the acetabular area) can result in insufficient native bone for stable fixation and long-term bone ingrowth of conventional porous cups. The development of trabecular metal cages with osteoconductive properties may allow a more biological and ...

Bone stock deficiency presents the major challenge in acetabular reconstruction during revision hip arthroplasty. The preoperative assessment of acetabular bone stock before revision surgery is critical because the amount and location of pelvic osteolysis can determine the type and success of revision surgery. ...

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 ...

It was the purpose of this biomechanical in vitro study to characterize the initial mechanical stability of 3 different acetabular reinforcement prostheses as a function of implant design and bone stock conditions. M�ller and Ganz rings and Burch-Schneider cage (Protek, M�nsingen, CH) were fixed using 3 screws in normal acetabuli and in acetabuli with ...

Bone matrix gelatin, prepared by sequential chemical treatment including decalcification with 0.6 N hydrochloric acid [9], was used as an alloimplant for the treatment of benign bone tumours, tumorous conditions of bone, acetabular dysplasia, delayed union, traumatic bone ...

To investigate the option of treatments for bone defect in femoral revision after total hip replacement (THR), 29 patients (29 hips) who had undergone hip replacement 13.7 years previously were hospitalized again to undergo revisions. 3 patients were given cement protheses and the other 24 patients were given non-cement protheses. In 3 cases were used ...

The aim of the research was to investigate the cemented bone-implant interface behavior (cement layer degradation and bone-cement interface debonding) with emphasis on imaging techniques suitable to detect the early defects in the cement layer. To simulate in vivo conditions a human pelvic bone was implanted with ...

Pelvic discontinuity is a complex entity with a high surgical complication rate and no standardized treatment to date. Revision hip arthroplasty in cases of massive bone loss remains a difficult and unsolved problem. The goal of the surgeon is to preserve limb function by restoring bone stock and the biomechanics of the hip. In cases of severe ...

INTRODUCTIONExtensive bone loss associated with revision hip surgery is a significant orthopaedic challenge. Acetabular reconstruction with the use of impaction bone grafting and a cemented polyethylene cup is a reliable and durable technique in revision situations with cavitatory acetabular ...

Many surgeons treat progressive femoral osteolysis in association with a well-fixed stem with bone grafting but in uncontained proximal defects the graft could get into the joint, raising a question regarding whether the osteolysis can be treated by simple d�bridement without bone grafting. We investigated whether the curetted ...

Impaction grafting is controversial in the presence of segmental and cavitary acetabular defects and requires the use of supplemental devices to close segmental defects. This approach, however, would allow treating combined deficiencies that could not be managed with impacted cancellous bone alone. We raised the ...

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 ...

Total hip arthroplasty (THA) still carries a higher failure rate in patients with avascular necrosis of the femoral head (AVN) than in a similar patient population with THA for other reasons. This is particularly true for the acetabular component. One of the major factors accounting for this is the compromised acetabular bone quality ...

Bilateral total hip arthroplasty during one anesthetic procedure can be beneficial in properly selected patients. For patients who have a failed hip arthroplasty requiring revision and a contralateral arthritic hip requiring primary arthroplasty, bilateral surgery permits the resected femoral head from the primary procedure to be used as a fresh autogenous bone-graft during ...

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 ...

We report a rare case of vesico-acetabular fistula due to an improperly treated pelvic fracture with urinary stone formation in the joint cavity. This complication was related to an unrecognized mechanism of bladder wall entrapment in the acetabular floor defect during weight bearing. This situation led to several mistreatment ...

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 ...

The theoretical advantage of using thinner acetabular components in hip resurfacing has not yet been clinically verified. Our purpose was to test the hypothesis of bone conservation and assess the effects of using a thinner acetabular component on hip biomechanics and clinical outcome. We compared the bone ...

The ideal acetabular component is characterised by reliable, long-term fixation with physiological loading of bone and a low rate of wear. Trabecular metal is a porous construct of tantalum which promotes bony ingrowth, has a modulus of elasticity similar to that of cancellous bone, and should be an excellent material for fixation. ...

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 ...

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 ...

Periprosthetic bone changes following hip arthroplasty are yet to be completely described. The material consisted of imagistic records (X-ray films, CT and MRI scans) and of acetabular bone tissue sampled from 14 cases with femoral head prosthesis and revision of the prosthesis fixed and decalcified in Duboscq-Brazil solution and ...

Cementless acetabular components are routinely used in revision hip surgery. Nevertheless, few investigators have assessed their retention and efficacy over the long term. This occurs mainly in cases which originate from moderate to severe bone losses (cavitary and or segmental) requiring the use of morselized and or bulk bone graft. ...

The study uses idealized two-dimensional finite element models to examine the behaviour of the acetabular construct following revision hip arthroplasty, carried out using the Slooff-Ling impaction grafting technique. The behaviour of bone graft was considered in detail, with non-linear elasticity and non-associated plasticity being adopted. Load was ...

Ensuring the stability of a cemented PROSTALAC cup (Depuy, Warsaw, Ind) in the presence of severe superior acetabular segmental deficiency is critical to the success of the first-stage surgery. We present an illustrative case and the surgical technique required to achieve this. PMID:21752577

Founded in Barcelona in 1985, the Spanish Hip Society (SECCA) now has over 200 members and organizes annual meetings. Papers read in the SECCA meeting are published in Hip International, since our society is affiliated with this journal. The late Sixties and early Seventies coincided with the beginning and development of total hip replacement. At present, over 30,000 hip prostheses are implanted ...

The optimal fixation of the acetabular component in primary total hip arthroplasty remains controversial. Long-term follow-up studies show that significant loosening rates occur with cemented acetabular components and that these problems persist despite attempts to improve cementing technique. Cementless acetabular components that rely ...

... wear rate of prosthesis contact surfaces is greatly accelerated if loose fragments of bone cement become detached and act as an abrasive in the ...

A retrospective review of 25 patients who underwent 28 acetabular revisions with the Burch-Schnieder antiprotrusio cage (Protek, Berne, Switzerland) and cancellous allograft bone was performed. Follow-up periods averaged 33 months. Patients had averaged 2.1 prior operations per hip. Twenty-two hips had American Academy of Orthopaedic Surgeons type III ...

of the acetabular implant. During #12;3 surgery, the pelvic bone is reamed with a cutter to match the hemispherical shape of the implant exterior. The implant is then pressed into the bone at an orientation which in to three sub-tasks: � choosing the proper implant exterior diameter to maximize bone contact in ...

- oral and acetabular implants and their respective receiving bones. Such systems lack the predictive is to model the bone/implant system and subse- quently study numerically the mechanical effects and the discretization of the area between the external bone boundary and the boundary of the implant. NUMERICAL ...

Acetabular osteolysis associated with socket loosening is one of the main long-term complications of total hip arthroplasty. In case of major bone loss, where <50% host bone coverage can be obtained with a porous-coated cementless cup, it is generally agreed that a metal ring or cage in association with a cemented component and ...

We report a rare case of vesico-acetabular fistula due to an improperly treated pelvic fracture with urinary stone formation in the joint cavity. This complication was related to an unrecognized mechanism of bladder wall entrapment in the acetabular floor defect during weight bearing. This situation led to several mistreatment ...

The survival of acetabular components depends on several factors: wear, osteolysis and septic or aseptic loosening. Osteolysis seems to be the main cause for concern in cementless arthroplasties. Acetabular osteolysis results from particle debris and segmental unloading of acetabular bone by rigid sockets. We ...

Hydroxyapatite (HA) granules of 100 to 300 microm, 0.9 to 1.2 mm and 3.0 to 5.0 mm were mixed in a ratio of 10:45:45 and packed into massive bone deficiencies in revision operations for total hip arthroplasty. We did not use additional graft or cup support for deficiencies of the lateral and medial wall. The procedure was carried out in 40 hips between 1986 and 1992. The ...

The purpose of this paper was to evaluate the results of acetabular revisions with the use of an oblong revision cup that is designed with its longitudinal diameter elongated relative to its transverse diameter. Between 1996 and 2001, 62 hips in 60 patients underwent an acetabular revision with the insertion of a LOR acetabular ...

Implantation of a cementless press-fit acetabular cup during hip arthroplasty alters stress transfer to the periacetabular bone, resulting in stress shielding of cancellous bone and enhanced load transfer to cortical bone. Theoretically, the thicker, stiffer and larger acetabular cup of a hip ...

wear de- bris which may accelerate loosening of implant bone interfaces. The position of im- pingement systems used in orthopaedics is the need for fiducial pins to be surgically implanted into bone before preDevelopment and Validation of a Navigational Guidance System for Acetabular Implant Placement* D

BackgroundWe studied which factor could predict aseptic loosening in ABG I hip prosthesis with hydroxyapatite coating. Aseptic loosening and periprosthetic osteolysis are believed to be caused, at least in part, by increased polyethylene (PE) wear rate via particle disease. Based on it, increased PE wear rate should be associated with aseptic loosening regardless of the type of implant.MethodsWe ...

The purpose of this study was to evaluate the outcome of trabecular metal (TM) acetabular components used in revision hip arthroplasty with major bone deficiency. We retrospectively reviewed the records of 46 patients undergoing revision hip arthroplasty with severe acetabular bone loss. Clinical outcomes were ...

We present an update of the clinical and radiological results of 62 consecutive acetabular revisions using impacted morsellised cancellous bone grafts and a cemented acetabular component in 58 patients, at a mean follow-up of 22.2 years (20 to 25). The Kaplan-Meier survivorship for the acetabular component with ...

Fracture stabilisation before the 19th century was in its infancy. The outcome was suboptimal, and quite often mortality was the end result. Advances in the stabilisation of long-bone fractures did not become apparent until the mid-1940s and for other bones, even later. In the mid-1960s, Judet and Letournel initiated a series of experimental and clinical ...

The reported results of acetabular cage reconstruction for pelvic deficiency are widely variable. Our primary question was: what is the survivorship of cage reconstruction with a primary end point of cage revision and secondary end points of radiographic loosening and any reoperation? Secondary questions were: which factors predict cage failure, and what is the functional ...

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 ...

A major concern during revision hip arthroplasty is acetabular bone loss and bleeding during the extraction of well-fixed cementless acetabular cup, because no interface exists between the host bone and the cup. Forceful removal of such component using curved gouges and osteotomes often leads to extended ...

Pathology of the acetabular labrum plays an increasing role in the treatment of hip pain. Hip arthroscopy has proven its clinical value as a useful procedure for successful treatment of labral tears. Until today, only a few studies have investigated the influence of articular cartilage defects on the clinical outcome of partial arthroscopic labrum ...

BACKGROUND: The recent interest in hip resurfacing arthroplasty is motivated by its potential advantages over THA. One advantage of hip resurfacing arthroplasty is that it conserves bone on the femoral side; however, it is unclear whether it does so on the acetabular side. QUESTIONS/PURPOSES: We determined whether the amount of ...

... the defect with bone cement ... LEGS, PROSTHETICS, BONES, RESISTANCE ... IMPLANTATION, POLYMETHYL METHACRYLATE, PATHOLOGY, PAIN ...

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 ...

STUDY DESIGN: Descriptive case report. OBJECTIVE: To report spinopelvic dissociation as a complication of autogenous bone graft harvest with the use of an acetabular reamer. SUMMARY OF BACKGROUND DATA: Iliac crest bone graft harvest has been previously described in orthopedic literature with overall complication rates of 0% to 39%. ...

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 and complications of ...

... BONES, *MORPHOGENESIS, DELIVERY, DEFECTS(MATERIALS), REPAIR, WOUNDS AND INJURIES, BATTLES, TRANSPLANTATION, BONE ...

INTRODUCTION: Instability is a major complication after revision total hip arthroplasty. Studies in the literature have shown that the dislocation rate after primary arthroplasties by anterior approach on a fracture table is satisfactory, but the rate of instability following revision surgery is not known. HYPOTHESIS AND AIMS: We hypothesized that the Hueter direct anterior approach would result ...

Retroperitoneal haematoma is rarely described in the context of bone scintigraphy, as it is usually an incidental discovery on bone scan carried out for another purpose. We report a case of a right retroperitoneal haematoma detected on Tc-99m-methylene diphosphonate bone scintigraphy taken in an elderly patient presenting with a ...

Recent in vitro work has shown that sealing the acetabular notch with bone graft in bovine acetabulum samples results in improved cement penetration in the acetabular bone during total hip arthroplasty. Successful sealing of the notch may be identified on postoperative films by a lack of cement extrusion. This ...

Decreased radiopharmaceutical uptake was noted on both bone and gallium scans in the case of acute hematogenous osteomyelitis of the right ilium (acetabular roof). This combination of findings is probably rare. The mechanism of decreased gallium uptake is unknown, but may be related to decreased blood flow.

This article summarises a clinical and radiographical analysis of 30 acetabular revisions in patients younger than 55�years old, performed with impaction bone grafting and cemented cups. Preoperative Merle D�Aubigne and Postel functional score was an average 7 points. At a mean follow-up of 86.5�months (range 34�228) functional score averaged 16.3 ...

A subject-specific three-dimensional finite element (FE) pelvic bone model has been developed and applied to the study of bone-cement interfacial response in cemented acetabular replacements. The pelvic bone model was developed from CT scan images of a cadaveric pelvis and validated against the experiment data ...

Plaster of Paris filling, in combination with antibiotics, is fully resorbed in the organism. This method of filling bone cavities and bone defects results in speeded up neoplastic bone tissue growth. Regeneration of bone tissue begins quite early, has an...

Bone grafting in discontinuity mandibular defects and augmentation bone grafting to the inferior mandible was accomplished using separately, autogenous bone, freeze-dried bone, autogenous bone in a vitallium tray, and composite bone (freeze-dried ...

Various biomaterials have been used for bone repair and reconstruction of bone defects. Inorganic xenogenic bone substitutes have been intensively studied because they possesses favorable regenerative properties. The purpose of this study was to evaluate the properties of a novel inorganic xenogenic ...

To predict the outcomes obtained with allograft-implant composite reconstruction of pelvic defects after bone tumor resection better, a retrospective review of a prospectively collected database was done and two groups of patients were identified. These groups were compared with respect to oncologic and functional outcomes in this investigation. Group 1 ...

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 ...

BACKGROUNDThis is a cohort trial (1997�2005) of 49 patients submitted to an acetabular component revision of a total hip arthroplasty, using impacted human and bovine freeze-dried cancellous bone grafts (H&FDBG) and a reinforcement device.OBJECTIVETo compare clinical/radiographic graft incorporation capability between cancellous ...

Using computed tomography-assisted (CT) osteodensitometry, we studied the bone changes that occurred in 12 patients at 2 weeks and again at 1 year after total hip arthroplasty with insertion of a press-fit acetabular cup and an uncemented femoral tapered stem. There was a greater decrease in full bone density (BD) lateral to the ...

A new approach in treating osseous defects is presented. Autogenous bone removed during osteoplasty and osteoectomy procedures was transplanted into the defects. This approach assures the successful treatment of defects not amenable to previously known 'n...

From 1985 to 2001, the Burch-Schneider antiprotrusio cage (B-S APC) was implanted in 57 cases (55 patients) with massive acetabular deficiency. The B-S APC survived until the last review 5 to 21 years after operation in 89.5% of the cases, produced substantial pain relief, and increased range of hip motion and walking capacity. The 10.5% failure rate was due to aseptic ...

A retrospective study of 50 surgically confirmed painful hip arthroplasties was performed to identify the roentgenographic findings that are most important in the detection of component loosening or infection. Plain film radiographs and subtraction arthrograms were reviewed in all cases, and specific features revealed by these two radiographic modalities indicative of component failure were ...

A retrospective study of 50 surgically confirmed painful hip arthroplasties was performed to identify the roentgenographic findings that are most important in the detection of component loosening or infection. Plain film radiographs and subtraction arthrograms were reviewed in all cases, and specific features revealed by these two radiographic modalities indicative of component failure were ...

We report the outcome of revision hip arthroplasty for patients with acetabular bone loss in whom the femoral head retrieved from arthritic contralateral hip during the same anesthesia was used as autograft for acetabular reconstruction. Thirty-two hips in 16 patients with a mean age of 63.8 years (range, 43-79 years) were followed for ...

Five patients presented with fiber metal mesh shedding of a Harris Galante II acetabular cup detected between 11 and 15 years after implantation. All patients presented with hip pain and 4 demonstrated gross acetabular loosening and fiber metal separation on preoperative radiographs. The remaining patient underwent revision surgery because of a liner ...

Experiences in the use of ultrasonic methods for the surgical treatment of bone fractures, defects, and diseases, and for dissection of bone and other biological tissues are discussed. Repairing fractures and defects in bones is accomplished by applicatio...

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 ...

Exostoses or osteochondromas are the most common benign bone tumors in children. The proximal femur is affected in approximately 30% of individuals and may lead to growth disturbances, acetabular dysplasia, and possible subluxation. Intraarticular lesions may also occur but are rarer. We present 2 cases of intraarticular exostoses that were successfully ...

Of 155 adults with sickle-cell anemia (SS, SC), radiographs of the pelvis or hip demonstrated protrusio acetabuli on at least one side in 14 (3 men and 11 women), as indicated by projection of the acetabular line medial to the ilio-ischial line. All 14 patients had bone changes attributable to sickle-cell anemia, including marrow hyperplasia and ...

Thirty-one postoperative pelvic computed tomographic (CT) scans in 29 patients studied between 1 day and 7 years after open reduction and internal fixation of acetabular fractures were reviewed. CT was most useful in the immediate postoperative period for detecting residual intraarticular fragments, localizing metallic fixation devices, and assessing the adequacy of reduction. ...

Articular cartilage lesions and osteochondral defects remain a difficult problem for the patient and physician. A variety of procedures and treatments have been proposed to lessen symptoms and restore the articular surface. The knee joint has been the focus of the vast majority of these cartilage restoration procedures. Osteochondral defects of the ...

... Use of a Porous Implant to Develop an ... Conclusion: Healing of bone defects in this ... Descriptors : *TOXICOLOGY, *BONES, TEST AND EVALUATION ...

The primary stability of cementless acetabular components is a prerequisite for their clinical success. The target of the present study was to analyse possible effects of post-operative joint loading on the initial mechanical stability of a press-fitted acetabular prosthesis. For this purpose, a three-dimensional finite element model of the pelvic ...

A technique for primary uncemented total hip arthroplasty in the presence of a superolateral acetabular deficiency is described. The resected femoral head is used as an autograft. Matching reamers are used to ream the pseudoacetabulum and femoral head. Lag screw fixation is then performed and reaming of the graft and host bone simultaneously allows ...

Twenty-two painful hip prostheses were studied prospectively with plain radiography, aspiration and arthrography, Tc-99m phosphate bone imaging, and gallium imaging to evaluate loosening, infection, or both and to compare the accuracy of these modalities. Fifteen prostheses were revised yielding 14 loose femoral and eight loose acetabular components. Five ...

Primary total hip arthroplasty (THA) in patients with osteoarthrosis secondary to developmental hip dysplasia is often complex due to anterolateral acetabular bone deficiency. The use of femoral head (shelf) autograft during the index arthroplasty provides nonimmunogenic, osteoconductive support with the potential for enhanced bone ...

The long-term stability of cemented total hip replacements critically depends on the lasting integrity of the bond between the cement and the bone, often referred to as fixation. In vitro assessment of fatigue behaviour of cemented acetabular, as opposed to femoral, replacements is of particular interest due to the more aggressive nature of late ...

The aim of this study was to analyze the clinical outcome and incidence of hip arthritis in elderly patients with acetabular fractures. Because of poor bone quality in the elderly, even a low-energy trauma may lead to an acetabular fracture. An anatomical reconstruction of the acetabulum is necessary to achieve sufficient stability ...

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 ...

Two Lord prostheses, bilaterally implanted in cadavers, were sectioned. The contact areas between bone and prosthesis were studied and measured using a specially developed reproducible method. Primary fixation of the femoral components appeared to be based principally on wedging of the prosthetic stem in the femoral shaft with a rather small contact surface. In both acetabuli ...

A case of cranial bone defect with porencephalic cyst in an adult was reported. A 47 year-old male was admitted with epilepsy. He had a round lytic bone defect lesion in the left frontal skull. The porencephalic cyst was under the bone defect. The mechanism of ...

We have reviewed, at a mean follow-up of 63.7 months, 36 total hip replacements performed with bulk acetabular autograft. Before surgery all the hips had acetabular insufficiency. Improvement of acetabular coverage was achieved in all cases with the patient's femoral head screwed to the ilium. Only one massive graft resorption was ...

AbstractAlthough the role of fatigue failure in aseptic loosening of cemented total hip replacements has been extensively studied in femoral components, studies of fatigue failure in cement mantle of acetabular replacements have yet to be reported, despite that the long-term failure rate in the latter is about three times that of femoral components. Part of the reason may be ...