Total hip arthroplasty in adult patients who had developmental dysplasia of the hip.

This study evaluated the hypothesis that the clinical results are equivalent in the group of patients with dysplasia, low dislocation, and high dislocation types using a contemporary technique for hip arthroplasty. The mean age of patients at the time of the index operation was 49.5 years (range, 29-61 years). Thirty patients (40 hips, 35%) had dysplasia, 22 (34 hips, 29%) had a low dislocation, and 24 (42 hips, 36%) had a high dislocation. The mean follow-up was 9.7 years (range, 6-14 years). In the high dislocation group, 7 hips (17%) had a revision of one or both component. In low dislocation group, 3 hips (9%) had a revision of one or both components. In the dysplastic group, 2 hips (5%) had a revision of one or both components.