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KMID : 0386720020140020097
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Journal of the Korean Hip Society
2002 Volume.14 No. 2 p.97 ~ p.102
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Total Hip Arthroplasty with the CLS Stem in Osteonecrosis of the Femoral Head
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Min Byung-Woo
Jeon Si-Hyun
Lee Kyung-Jae
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Abstract
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Purpose : To assess the follow up results of total hip arthroplasty using cementless Spotorno (CLS) femoral stem in osteonecrosis of the femoral head.
Materials and Methods : We analyzed the Harris hip score (HHS), stability of the stem, radiolucent lines, femoral osteolysis, and stress-shielding after 2 years in 92 total hip arthroplasties done with the CLS stem between 1995 and 1998.
Results : The average follow up period was 3.7 years. Average HHS improved from 54.5 points preoperatively to 93 points at the latest follow up. Radiographic analysis revealed excellent and stable fixation in all hips. Radiolucent lines were found in 25% of the cases, especially in Gruen Zones 1 or 7. Some reduction in proximal bone density (Zone 7) was observed in 38% of the hips. Focal femoral osteolysis was present in 4 hips (4.3%), one of which featured distal osteolysis(zone 3, 4 and 5).
Conclusion : The midterm results of the CLS stem showed excellent fixation and pain relief in patients with osteonecrosis of the femoral head. Further follow up is required due to the existence of osteolysis.
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KEYWORD
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Total hip replacement, Osteonecrosis of the femoral head, CLS femoral stem
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