TOTAL HIP REVISION ARTHROPLASTY WITH MEGA PROSTHESES

Total hip arthroplasty (THA) with the use of a Mega prosthesis was per formed on 24 patients with significant loss of bone stock in revision THA. A clinical and radiological examination was carried out according to the Enneking evaluation scheme on average 7 years after THA. Pain: active hip motion and strength of hip muscles, walking ability, and a ctivities of daily living rated excellent or good and compared well wi th the results following conventional THA. Limp and positive Trendelen burg sign were common to all except one after Mega prosthesis implanta tion and were independent on the type of refixation of the hip abducto rs. Dislocation of the prosthesis occured in 16,6% of cases and depend ed on the type of cup implanted. Remarkable was a periprosthetic callu s formation surrounding the stem of the femoral implant.