STANMORE TOTAL HIP REPLACEMENT A NINE- TO TEN-YEAR FOLLOW-UP

performed; of these, 146 were in 135 patients who had not had previous hip surgery. At review 52 had died, but none of the others was lost to follow-up. Of the 52, two had had a second operation, one for infection and one for recurrent dislocation. In the remaining 83 patients (92 hips) five revisions were necessary: fourforasepticloosening, and one for stem fracture. The remaining 78 patients had little or no pain and little restriction of activity. After a follow-up period of at least nine years, the survival rate of the prosthesis was 95%. There had been migration of the femoral component in five cases and migration of the acetabular cup in one case, but no wear of the acetabular component could be demonstrated. Although Charnley first inserted a cemented prosthesis in 1962 (a metal femoral component combined with an ultra-high density polyethylene acetabular cup; Charn-ley 1979), there are few reports with a follow-up of 10 years or more; moreover, in most of these, many patients have been lost to follow-up (Salvati et al. 1981; Stauffe