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Ceramic femoral heads have been used in an attempt at reducing polyethylene wear of total hip arthroplasties. Clinical results with zirconia femoral heads have been mixed. This study was undertaken to compare the polyethylene wear and incidence of periprosthetic osteolysis in total hip replacements performed using a 28-mm zirconia versus a 28-mm cobalt chromium femoral head. Thirty-five hips with...
The rationale for the use of free vascularized fibular graft for osteonecrosis of the hip is based on the assumption that the graft will provide support and blood supply to the osteonecrotic head. We report the histopathologic features of 6 consecutive osteonecrotic heads with failed vascularized fibular grafts. Three grafts were partially viable, and 3 were necrotic. The medullary canal was completely...
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