Abstract
Most Japanese patients with osteoarthritic hips develop this secondarily to the acetabular dysplasia. Therefore, patients with an early stage of osteoarthritis can be more easily and effectively treated than those with primary osteoarthritis of the hips. Pelvic osteotomy with articular cartilage is one of the most promising options for successfully treating this disease. The main indication for performing osteotomy is usually the occurrence of osteoarthritic hips at an early stage. Additionally, advanced stage cases may also be included once they have demonstrated good congruity during abduction.