OUTCOME OF TOTAL HIP ARTHROPLASTIES WITH CEMENT - RESULTS AFTER IMPLANTATION OF THE HARRIS DESIGN-2 PROSTHESIS, 1983-1985

Most reports of excellent long-term results of cemented total hip arth roplasty originate from studies of Charnley prostheses. A radiographic and clinical study was performed on 126 patients who underwent a ceme nted total hip arthroplasty from 1983 to 1985 with the Harris Design 2 prosthesis (Howmedica, Rutherford, NJ). The femoral component was cob alt-chromium and it had a broad, rounded medial border and a collar. T he head diameter was 26 mm. A cemented all-polyethylene socket was use d in all cases. At the last follow-up examination, 71% of the patients were completely free of pain and no patient had severe,ain or pain at rest. Kaplan-Meier survival analysis estimated the revision rate at 1 0 years after operation to be 5 +/- 2% (mean +/- SEM) (including plann ed revisions). The rate of complete acetabular demarcation was 20% at 10 years, and femoral demarcation involving more than 50% of the bone- implant surface or endosteal cavitation was noted in only three cases. These results are as good as the best reported after total hip arthro plasty with the Charnley prosthesis.