Abstract
Our objective was to investigate the medium-term results of Charnley low friction arthroplasty (LFA) for osteoarthritis using improved cementing techniques. We performed Charnley LFA on 94 patients (105 hips) between 1983 and June 1993 using improved cementing techniques. Of these, 98 hips were examined 5–15 years after the operation. Clinical failure was defined as revision. Radiological failure was defined as loosening. We performed clinical and radiological survival analysis using the Kaplan-Meier method. Aseptic loosening of the components was observed in seven hips (7%), in which two components (2%) were revised. Among the seven loosened hips, technical failure was noted in four hips. The clinical survival rate calculated by revision as the end point was 95% and the radiological survival rate calculated by loosening as the end point was 90% at 15 years. We conclude that medium-term results of LFA with use of improved cementing techniques were satisfactory except in the case of technical failures. However, this component has limitations with regard to friction and wear.
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