Change in incidence of hip fracture in Gwangju City and Jeonnam Province, Korea, over 20 years.

Unlabelled: This study determined the incidence of hip fractures in Gwangju city and Jeonnam province of Korea in 2011 and compared it with the rates in the same area in 1991 and 2001.

Introduction: This study determined the incidence of hip fracture in Gwangju city and Jeonnam province in Korea in 2011 and compared it with the rates in the same area in 1991 and 2001, with the aim of identifying any changes in 2011.

Methods: Korea Health Insurance Review Agency patient data from Gwangju city and Jeonnam province for the period 2011 January 1 to December 31 was analyzed.

Fifteen- to 20-year results of uncemented tapered fully porous-coated cobalt-chrome stems.

In this paper, we evaluated the long-term results of uncemented total hip arthroplasties using tapered fully porous-coated cobalt-chrome stems (Autophor 900S). The average follow-up was 206 months in 127 hips (113 patients). The articulations of the joints were ceramic-on-polyethylene in 43 hips and ceramic-on-ceramic in 84.

Outcome of cheilectomy in Legg-Calve-Perthes disease: minimum 25-year follow-up of five patients.

The authors report minimum 25-year follow-up results of cheilectomy performed in five hips affected by Legg-Calve-Perthes disease (LCPD) with hinged abduction. All five hips had a poor prognosis in terms of age at disease onset, treatment delay, hinged abduction, subluxation, and extensive head involvement. Cheilectomy, partial capital resection, was made along the indentation groove on the articular surface of the femoral head.

Deformity of the femoral head following vascular infarct in piglets.

Background: In Legg-Calvé-Perthes disease (LCPD), 4 major patterns (coxa plana, coxa magna, coxa vara, subluxation) of the femoral head are commonly observed. However, direct observation of pathological specimens is rarely possible. An animal model of LCPD may clarify the pathogenesis of femoral head deformity.

Immediate cementless total hip arthroplasty for the treatment of active tuberculosis.

We report the results of a primary total hip arthroplasty (THA) in 7 patients with advanced active tuberculous arthritis of the hip and had lost the chance of preserving the hip without replacement surgery. Tuberculosis was confirmed in all cases by the culture or histological examination. All patients were treated with primary THA followed by antituberculous medications for 1 year.

Rising incidence of hip fracture in Gwangju City and Chonnam Province, Korea.

The purpose of study was to determine the incidence of hip fracture in 2001, to compare this with that of 1991, and to identify possible causes of change. Patients aged 50 yr or more living in Gwangju City and Chonnam Province, Korea, and who sustained a fracture of the hip during 2001 were investigated. Only patients who were admitted to hospitals for primary treatment of the first hip fracture were selected.

Developmental pattern of femoral shortening following devascularization of the capital femoral epiphysis in piglets.

To investigate the developmental pattern of femoral shortening in Legg-Calve-Perthes disease, the authors made an experimental model of the disease in piglets by devascularizing the capital femoral epiphysis and following the piglets to skeletal maturity. The discrepancy first increased in the postoperative 0 to 8 weeks (1.2-1.

Residual shortening after Legg-Calve-Perthes disease, focusing on the response of the ipsilateral tibia.

Residual shortening of the affected limb was measured at skeletal maturity by teleoroentgenograms in 68 patients with Legg-Calve-Perthes disease (LCPD); special attention was paid to the length of the ipsilateral tibia. Of these 68 patients, 38 were treated by abduction orthosis (AO) and 30 by femoral varus osteotomy (FVO). Residual shortening in AO group was significantly greater than that in FVO group.

Why does outer joint motion predominate in bipolar hip prosthesis? Experimental and clinical studies.

Background: Theoretically, the motion of a bipolar hip prosthesis is most likely to occur at the inner joint if the frictional coefficients are equal at both surfaces. However, many studies have suggested that most motion occurs at the outer joint.

Material And Methods: We performed an analysis of motion in a cadaveric bone model and in 50 patients during fluoroscopic examination, to determine how the motion is distributed between the two joints and what factors contribute to this distribution.

The correlation between coxa magna and final outcome in Legg-Calve-Perthes disease.

This study evaluated the final outcome of coxa magna that developed as a sequela of Legg-Calve-Perthes disease. The final outcomes at skeletal maturity were assessed by the Stulberg classification in 85 children with unilateral Perthes disease. Among them, 21 children had a bilateral arthrogram at the active stage of the disease, and the arthrogram measurements were compared with those measured at disease healing and at skeletal maturity.

Dysplasia epiphysealis capitis femoris: Meyer dysplasia.

The clinical importance of dysplasia epiphysealis capitis femoris (Meyer dysplasia) is that it is easily mistaken for Legg-Calve-Perthes disease, leading to unnecessary diagnostic procedures and treatments. After a review of 578 children (619 hips) with Legg-Calve-Perthes disease, 17 children (27 hips) in whom both the clinical and radiologic pattern was obviously different could be found and a diagnosis of dysplasia epiphysealis capitis femoris was finally made. The mean age was 2.

The effects of subluxation of the femoral head with avascular necrosis in growing rabbits.

To validate the adverse effects of subluxation of the femoral head in Legg-Calve-Perthes disease, the authors made an experimental model of Perthes disease with subluxation in growing rabbits by interrupting the epiphyseal artery (devascularization) and immobilizing the knee in extension (immobilization). Seventy-two rabbits, 4 to 5 weeks old, were divided into three groups: group A with both devascularization and immobilization (25 rabbits), group B with devascularization only (25 rabbits), and group C with immobilization only (22 rabbits). In each experimental group, four to six rabbits each were killed at 1, 2, 4, 8, and 12 weeks.

Failure of osteointegration of hamstring tendon autograft after anterior cruciate ligament reconstruction.

Anterior cruciate ligament (ACL) reconstruction is completed after implantation, when the graft material used undergoes extensive biologic remodelling and osteointegration. Failure of the osteointegration between the graft tendon and bone decreases the graft strength and induces anterior instability. We experienced 2 cases of failed osteointegration between tendon and bone after ACL reconstruction using 4 strands of the hamstring tendon.

Unusual osteonecrosis of the femoral head misdiagnosed as a stress fracture.

We report a case of femoral head osteonecrosis that originally was misdiagnosed as a femoral neck stress fracture by plain radiography and magnetic resonance imaging. The correct diagnosis was made using pinhole bone scintigraphy, which revealed a completely cold lesion of the entire femoral head, confirmed by histologic examination. The patient was treated with muscle pedicle bone grafting, and 3 months postoperatively, pinhole bone scintigraphy showed improved vascularity of the femoral head.

Acetabular revision using acetabular roof reinforcement ring with a hook.

This study evaluated the clinical and radiographic results of 37 acetabular revisions using an acetabular roof reinforcement ring with a hook (ARRRH). The average age of the patients was 52.4 years, and the mean follow-up period was 4.

Significance of laboratory and radiologic findings for differentiating between septic arthritis and transient synovitis of the hip.

Although significant differences exist in the methods of treatment and prognoses of septic coxitis and transient synovitis in children complaining of acute hip pain, similar symptoms are present in these two diseases at the early stages, and differential diagnosis is difficult. To differentiate between these two diseases, the authors evaluated the clinical, serologic, and radiologic findings and tried to determine factors that could be used as diagnostic criteria. The authors performed a retrospective study by evaluating medical records, plain hip radiographs, and clinical findings in 97 patients with transient synovitis and 27 patients with septic arthritis.

A new innominate osteotomy in Perthes' disease.

The purpose of this study was to evaluate the results of the authors' modification of Salter innominate osteotomy in Perthes' disease. The operation was performed in 16 hips of 15 Perthes' patients (11 boys and 4 girls). The posterior half of the ilium was cut by a Gigli saw using a conventional method.

Computed tomographic findings of osteochondritis dissecans following Legg-Calvé-Perthes disease.

Routine radiographs in the follow-up study of Legg-Calvé-Perthes disease patient have generally been plain radiographs of the anteroposterior and frog-leg lateral view. Recently, several reports have found that osteochondritis dissecans can develop in 2% to 4% of Legg-Calvé-Perthes disease patients. Early roentgenographic recognition of this lesion is very important for its long-term prognosis.

Fate of the osteochondral fragments in osteochondritis dissecans after Legg-Calve-Perthes' disease.

The treatment of osteochondritis dissecans after Legg-Calvé-Perthes' disease has not been clearly determined. It may be either by simple observation or surgical removal of the osteochondral fragment. We studied the evolution of the lesion in 13 children and reviewed 92 hips reported in the literature.