Abstract
Ninety Burch-Schneider antiprotrusio cages in 87 patients implanted in primary and revision total hip arthroplasty were analyzed. Sixty-seven hips (64 patients) could be examined clinically and radiologically after an average of 50.3 months (minimum 23.6, maximum 131.0 months). Twenty patients (20 hips) died in interim and 3 patients (3 hips) were not available for follow-up. Of the 90 Burch-Schneider antiprotrusio cages, 4 had to be removed and 8 further cages were considered definitely loose. The survival rate is 93.4% (95% confidence interval, 74.3%-96.7%) after 131 months if the endpoint “cage explantation” is used. The average Harris Hip Score was improved from 28.2 preoperatively to 73.5 points at the time of follow-up. Radiolucent lines were often found in the Charnley/DeLee's zones II and III. In contrast, osteolyses were seldom seen.
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