POROUS COATED ANATOMIC NON‐CEMENTED TOTAL HIP ARTHROPLASTY

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Abstract
Between November 1984 and December 1989, 318 non-cemented Porous Coated Anatomic (PCA; How-medica, Rutherford, New Jersey) total hip replacements were performed by the authors. A follow-up of 1 to 6 years was allowed. The average age was 53.1 years (from 17 to 71 years). The distribution of right-to-left was approximately equal. There were 192 hip replacements for primary and post-traumatic osteo-arthritis, 42 for rheumatoid arthritis, 40 for avascular necrosis, 29 for congenital dislocation or hip dysplasia with secondary osteo-arthritis, 6 for Perthes disease, 5 for previous sepsis, 2 of whom had had a Girdlestone procedure, 2 for revision of a painful cup arthroplasty, and 1 for conversion of a previously fused hip. All patients were evaluated on a one hundred point Harrington Arthritis Research Centre Scale. Points were awarded for pain (0-35), function (0-35), motion (0-10), deformity (0-10) and gait (0-10). Pre-operative total scores averaged 45.5 (9-71) and postoperative scores averaged 83.9 (55-98). The overall results were excellent 20.5% (90-100), good 59.8% (80-90), fair 16.4% (70-80), and poor 3.3%. Postoperative radiographs were evaluated using zonal analysis. There was no deterioration on the radiographs after two years.