Rates of Osteolysis in Well-Functioning Alumina-on-Highly Cross-Linked Polyethylene Bearing Cementless THA in Patients Younger than Fifty with Femoral Head Osteonecrosis
We asked whether total hip arthroplasties (THAs) using alumina-on-highly cross-linked polyethylene bearing would improve functional activity, and reduce aseptic loosening, polyethylene wear, and osteolysis. Consecutive primary THAs were performed in 71 patients (73 hips) who were younger than 50 years old (mean age, 45.5 years) with femoral head osteonecrosis. There were 48 men (50 hips) and 23 women (23 hips). Osteolysis was evaluated using radiographs and computer tomographic scanning. The average follow-up was 8.5 years (7–9 years). The mean preoperative Harris hip score was 50.6 points, which improved to 96 points at the final follow-up. Preoperative functional activity was improved significantly at the latest follow-up. The mean polyethylene linear penetration was 0.05 ± 0.02 mm per year and no hip had aseptic loosening or osteolysis.
KeywordsFemoral Head Femoral Component Aseptic Loosening Acetabular Component Polyethylene Liner
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