Uncemented Total Hip Replacement Using Ha Coated Stem in Avascular Necrosis of Femur Head: Minimum Follow Up of 3 Years

40 patients who were an average of thirty three (range, twenty three to fifty years old) received a hydroxyapatite-coated femoral prosthesis as part of a total hip arthroplasty and were followed for a minimum of three years (average, 3.8 years, range, three to 5.4 years) or until revision. The average Harris hip score was 40 points (range, 22 to 70 points) preoperatively and 91 points (range, 68 to 95 points) at the time of the latest clinical evaluation. et al. All stems were radiographically osseointegrated according to a modification of the criteria described by Engh et al. Two stems were revised, but none of the revisions were performed because of mechanical failure (one, because of an infection, and one, after a traumatic femoral fracture that occurred one year postoperatively). The over-all clinical results associated with hydroxyappatite-coated femoral components were excellent in this group of young patients after short to intermediate-term follow-up. A review of serial radiographs showed mechanically stable implants with osseous ingrowth.