Acetabular Revision Using Uncemented Acetabular Cup

ABSTRACT

PURPOSE: The purpose of this study is to evaluate the clinical and radiological results of revision total hip arthroplasty with using impacted bone grafts and uncemented acetabular cups on the acetabulum with bone defects. MATERIALS AND METHODS: From June 1990 to March 2006, 131 revision total hip arthroplasties using an uncemented acetabular cup and impacted bone graft, were performed in 124 patients. The average follow-up period was 66 months. The clinical results were evaluated with the Harris hip score. The radiological results included the period of graft incorporation, the rate of resorption, the migration and the change of inclination of the cup. The failure rate and 13 year survival rate were analyzed. RESULTS: The Harris hip scores were 51.8 preoperatively and 82.5 postoperatively. The period of incorporation was a mean of 6.38 month. Most cases showed a resorption rate below 10%. The mean migrations of the acetabular cup were 1.37 mm superiorly and 1.20 mm medially. The mean change of inclination was 1.24 degrees. There were 5 re-revision surgeries. The failure rate was 3.8%. The survival rate of the revision that was done due to loosening was 94.9% at 13 years. CONCLUSION: Acetabular revision arthroplasty with bone grafts, and an uncemented cup is recommendable as it achieves favorable outcomes in terms of rapid incorporation of the grafted bone and stable fixation of the cup.