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Hip dysplasia is the most common cause of secondary osteoarthritis (OA). Periacetabular osteotomy (PAO) or rotational acetabular osteotomy (RAO) has been used as a joint-preserving procedure. However, the patient selection criteria are not clearly defined.

Patient Selection Criteria for Periacetabular Osteotomy or Rotational Acetabular Osteotomy