Rotational Acetabular Osteotomy for Secondary Osteoarthritis with Severe Acetabular Dysplasia of the Hip More Than 10 Year Follow-up

Abstract

　The treatment of severe dysplasia of the hip remains controversial. The rationale for the use of the rotational acetabular osteotomy (RAO) is that it increases the weight-bearing area by shifting the osteotomized acetabulum to cover the femoral head. We have used the technique of Ninomiya and Tagawa in more than 540 patients with acetabular dysplasia. This can improve joint function as well as achieve relief of pain. In this report, we describe the technique of RAO and the results of this procedure in patients with severely dysplastic hips.

　The mean JOA clinical score changed from 65.4±11.8 points (29-90) preoperatively to 68.6±21.0 points (21-68.6) at final follow-up (before revision surgery) after mean of 17.1 years. The mean pain score improved from 18.3±6.3 points (0-30) to 25.6±9.6 points (0-40). 19 hips had required THA (Total Hip Arthroplasty), which were performed in 10 patients within 10 years after RAO.

　The results of RAO for correction of severely dysplastic hips in adults were satisfactory after mean of 17.1 years.