Total hip replacement by the Müller-Charnley prosthesis. A follow-up study of 238 operations after 2 to 7 years.

A prospective study of 238 total hip replacements, with the Müller prosthesis, is presented. The complications in the total material and the results in 216 hips with follow-up times from 2 to 7 years are described. Eighty-four per cent of the hips were free from significant pain and 64 per cent had a total range of motion exceeding 160 degrees. Aseptic loosening of the femoral component, entailing reimplantation, has occurred in 6.7 per cent and, in addition, 9.2 per cent show radiological evidence of deterioration of the fixation of the femoral component. No deep infection has been encountered. None of the hips has ended as an excision arthroplasty.