Abstract
We have performed 81 endoprosthesis in our hospital, using 38 Austin-Moore types, 11 Thompson types, 25 Bateman U. P. F. types and other types. In these, 12 revision cases have been experienced; 3 so-called hips with unexplained pain, and 9 proximal migrations including 5 distal migrations, and one stem breakage of Judet type.
Technical problems and practical solutions with respect to these revision surgeries were described and also the clinical results after revision. Some acetabular erosion was observed in the hips with unexplained pain during surgery.
The proximal migration in revision cases is independant of body weight, prosthetic head/femoral head ratio and osteoporosis. However there was an increased R. I. uptake (Tc. -scintigram) in the hips with unexplained pain.
