Bilateral osteonecrosis of the femoral head associated with pregnancy: four new cases and a review of the literature.

Osteonecrosis is thought to result from the temporary or permanent loss of blood supply to the bones. Without proper nutrition, the bone tissue dies, is resorbed, and collapses. If the process involves the bones in a joint, it often leads to collapse of the joint surface.

Neurologic injuries after total hip arthroplasty.

Neurologic injuries are a potentially devastating complication of total hip arthroplasty (THA). Review of the literature reveals that these injuries are uncommon. The reported incidence ranges from 0.

A 15- to 25- year follow-up study of primary Charnley low-friction arthroplasty: a single surgeon series.

Long term outcome studies are essential to determine the effectiveness and durability of a procedure. We report our 15 to 25 year clinical and radiographic follow-up with the Charnley low-friction hip arthroplasty. Four hundred and forty-seven primary Charnley hip arthroplasties were performed by a single surgeon.

New developments in ochronosis: review of the literature.

Ochronosis commonly affects all connective tissue. Recognition of changes secondary to the deposition of ochronotic pigments has increased with advances in diagnostic technology, allowing both improved imaging and early biochemical and genetics-based diagnosis of alkaptonuria, the cause of ochronosis. Successful symptomatic treatment of ochronotic arthropathy with joint replacement has been documented, and a new pharmacotherapeutic agent, nitisinone, is currently under investigation for both prevention and treatment of ochronosis.

Influence of demographic and technical variables on the incidence of osteolysis in Charnley primary low-friction hip arthroplasty.

The influence of demographic and technical variables on the incidence of osteolysis in Charnley primary low-friction arthroplasty was investigated. Demographic variables included age, gender, diagnosis, and Charnley joint class. Technical variables included the design of acetabular and femoral components, subchondral plate retention versus removal, and cementing techniques.

Comparison of complications after transtrochanteric and posterolateral approaches for primary total hip arthroplasty.

For this study, 100 total hip arthroplasties (THAs) in a transtrochanteric approach group and 100 THAs in a posterolateral approach group were performed at one university hospital by a single, experienced surgeon. These THAs were then followed up for a minimum of 2 years to determine the incidence of postoperative complications. In our study, patients undergoing primary THA by the posterolateral approach were 18.