Implication of Femoral Stem on Performance of Articular Surface Replacement (ASR) XL Total Hip Arthroplasty |
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| Authors: | Johannes Cip Archibald von Strempel Christian Bach Matthias Luegmair Thomas Benesch Arno Martin |
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| Institution: | 1. Department of Orthopedic Surgery, Academic Teaching Hospital Feldkirch, Medical University of Innsbruck, Feldkirch, Austria;2. Moos 4, Wangen, Germany;3. Center for Medical Statistics, Informatics and Intelligent Systems, Medical University of Vienna, Vienna, Austria |
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| Abstract: | Taper junctions of large diameter metal-on-metal femoral heads and femoral stems were described as metal ion generator due to accelerated wear and corrosion. However, literature about the Articular Surface Replacement (ASR) total hip arthroplasty (THA) invariably deals with stems manufactured by DePuy Orthopedics (Warsaw, IN, USA). Nothing is known whether different stems with common 12/14 mm tapers affect failure rate or ion release. 99 ASR THA (88 patients) implanted with CoxaFit or ARGE Geradschaft stems (K-Implant, Hannover, Germany) were retrospectively analyzed. After a mean follow-up of 3.5 years revision rate was 24.5%, mostly due to adverse reaction to metal debris (ARMD). CT scan revealed component loosening in 10.3% and pseudotumoral lesions in 12.6%. Elevated ion concentrations (> 7 μg/l) were found in 38.6%. |
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| Keywords: | Articular Surface Replacement ASR total hip replacement total hip arthroplasty failure rate femoral stem |
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