Abstract
We report nine cases of osteoarthritis of the hip treated with Japanese Orthopaedics Hip Prosthesis (JOHP) and followed up for one year or more. All patients were female. The average age at operation was 66.3 years (range:62 to 75 years). The average duration of follow-up was 3.5 years (range:1 to 5.7 years). We discussed the results by Japanese Orthopaedic Association (JOA) hip score and radiologically. The average JOA hip score improved from 33 to 82. Especially, pain improved. Radiologically, sinking of the stem was found only in one case, but pain remained. In the other eight cases, no sinking and loosening were found. The results indicate that the JOHP is a useful system for Japanese with acetabular dysplasia, because the form of the cup is not semispherical.
