ABSTRACT
PURPOSE: This study was aimed to evaluate the clinical and radiologic results of revision total hip arthroplasty using a cementless cup and a morselized femoral head allograft in acetabular bone deficiency. MATERIALS AND METHODS: From January 1992 to December 1999, the authors performed 37 revision total hip arthroplasties using morselized femoral head allografts and cementless cup. This study evaluated the clinical and radiologic results, at a mean follow-up of 50 months. We evaluated the Harris hip score clinically, and the displacement of acetabular cup by Yoder's criteria. Location and progression of radiolucent area within acetabular zone, which was defined by DeLee and Charnley was observed and recorded. RESULTS: Mean Harris hip score was improved from 50.6 preoperative to 89.2 at final follow-up. A radiolucent zone between host bone and graft bone was observed in 5 cases, and between graft bone and cup in 7 cases, but all of these were less than 2 mm. The change of cup angle more than 4 degrees were observed in 3 cases in Gross type 4, 4 mm superior migration of acetabular cup was observed in 1 case in Gross type 3 and 5 mm horizontal migration was observed in 1 case in Gross type 4. CONCLUSION: Although the early results in revision total hip arthroplasty have been encouraging to date except for Gross type 4, a more long term follow-up study with a larger size cases are needed.