抄録
We followed 48 patients (48 joints) for more than 5 years after femoral head replacement with an Austin-Moore type prostheses. Twenty-two had died, 3 were missing, one was re-operated on with a total hip prostheses, so 22 could be evaluated clinically. The average length of follow-up was 7.4 years, and the average age at the most recent follow-up was 74.9 years old. Though 12 patients could enjoy out door lives, 5 were limited to indoors and 5 were always in bed. But in 7 of the 10 patients who could not walk satisfactorily, poor results were due to systemic complications such as rheumatoid arthritis, hemiplegia, and senile dementia.
Radiograms of 15 patients were evaluated; loosening was found in 2 (13%), distal migration in 11 (73%), and central migration in 6 (40%) . The loosening caused severe pain which resulted in an inability to walk, but distal migration did not affect clinical results. Central migration seemed to cause hip pain which was not so severe that it disturbed daily life. It was often seen in cases with smaller prostheses in diameter compared with the other femoral head.
