Long-Term Durability of the CLS Femoral Prosthesis in Patients with Osteonecrosis of the Femoral Head |
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Authors: | Su-Il Han Ji-Ho Lee Jun Woo Kim Chang Wug Oh Shin-Yoon Kim |
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Institution: | 1. Department of Orthopedic Surgery, Daegu Woori Hospital, Daegu, Korea;2. Department of Orthopedic Surgery, Upper Extremity and Microsurgery Center, Semyeon Christianty Hospital, Pohang, Korea;3. Department of Orthopedic Surgery, Graduate School of Medicine, Kyungpook National University, Daegu, Korea |
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Abstract: | Ninety-five hips with cementless wedge-shaped tapered CLS stem were evaluated with a mean duration of 12.7 years (range, 10.7–17.3 years). All patients were young and diagnosed with osteonecrosis of the femoral head. The Harris hip score was 92 at the latest follow-up. A subsidence greater than 3 mm was found in 3 hips (3.2%). Focal femoral osteolysis was found in 12 hips (12.6%). Endosteal bone formation and bony pedestal were observed in 94 hips (98.9%) and in 26 hips (27.4%), respectively. With revision for stem loosening as the end point, the survivorship showed 98.9% (95% CI, range 96.9%–100%) at 13 years. Stem alignment and proximal femur morphology did not influence loosening of the stem (p > 0.05). |
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Keywords: | CLS stem total hip arthroplasty osteonecrosis stem alignment proximal femur morphology |
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