Rotational acetabular osteotomy (RAO) is a procedure that corrects dysplastic acetabulum by circumacetabular osteotomy, obtaining a more anatomical relationship between the femoral head and acetabulum. RAO was performed on 531 patients (626 hips) between February 1980 and August 1997. One hundred and twelve patients (134 hips) were followed over 10 years to form the basis of this study. Postoperatively, the total Japan Orthopedic Association score (JOA score), center-edge, and oblique angle improved in all cases. RAO is a technique that can be indicate for pre, early, and even for some advanced stage coxarthrosis patients for long term excellent results and also for some advanced patients to temporize in anticipation of total hip arthroplasty.
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