Copyright 1996 by The Journal of Bone and Joint Surgery, Incorporated Remodeling of Bone around

ABSTRACT: Two hundred and twenty-four total hip arthroplasties were performed in 201 patients with use of a femoral component with hydroxyapatite coat-ing of the proximal portion of the stem. The mean duration of follow-up was seventy-one months (range, fifty-eight to eighty-seven months). Of the 224 arthro-plasties, 208 (93 per cent; 190 patients) yielded a good or excellent clinical result. Four patients (2 per cent) reported mild-to-moderate activity-related pain in the thigh, and two (1 per cent) had aseptic loosening. The radiographic findings of progressive new-bone formation (cancellous condensation and cortical hy-pertrophy) throughout the zones adjacent to the mid-dle and distal portions of the stem were evidence of early, extensive proximal fixation of the implant, wit