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KMID : 0361620060410010096
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Journal of the Korean Orthopaedic Association
2006 Volume.41 No. 1 p.96 ~ p.102
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Primary Total Hip Arthroplasty Using Non-cemented Multilock Proximal Porous Coated Femoral Stem - Ten to Twelve Years Follow Up Study -
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박상원/Park SW
이순혁/백종륜/정종원/최기원/Lee SH/Baek JR/Chung JW/Choi GW
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Abstract
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Purpose: This study evaluated the minimum ten-year result of primary total hip arthroplasty with a non-cemented Multilock femoral stem.
Materials & Methods: Fifty five total hip replacements in forty-four patients using a non- cemented Multilock femoral stem and Harris-Galante 2 acetabular component were performed between January 1992 and December 1994. Forty-four hips in thirty-six patients were available for follow up for an average of eleven years (range, ten to twelve years). The clinical results were evaluated based on the Harris hip scores. A detailed radiography analysis was performed by an evaluation of the radiolucent lines, femoral osteolysis, and fixation stability by Engh Method.
Results: The average Harris hip score improved from 54.3 points preoperatively to 93.6 points postoperatively. Non-progressive radiolucencies < 2 mm in width were observed in nine (20.5%), and femoral osteolysis was observed in thirteen cases (29.5%). For the fixation stability, osseous ingrowth was noted in thirty nine cases (88.6%) and fibrous ingrowth was observed in two (4.5%). There were three (6.8%) cases with unstable fixation. Two hips underwent revision. The survival rate of the femoral component was 93.2% (forty one cases) after a minimum ten-year follow up.
Conclusion: The non-cemented Multilock femoral component provided excellent clinical and radiographic results. However, the rate of femoral osteolysis was relatively high (mostly restricted to zone 1 and 7).
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