Abstract
From 1960, after the development in our clinic of the Katayama-Hirakawa type cup for mold arthroplasty, 32 cases, 6 male and 26 female, were operated upon using it. Removal of the cup took place in 6 cases due to breakage of the cup or infection following the operation.
Follow-up studies were undertaken on 15 cases, 3 male and 12 female. The ages of the patients at the time of operation ranged from 21 to 52, the average being 40. The follow-up period was between one year, 4 months, and 27 years, and 27 years, and the average was 10 years, 7 months.
The postoperative results have been evaluated by the 100 point rating hip scale of the Japanese Orthopaedic Association. The postoperative score was 55 points on the average compared with a preoperative one of 43. For the cases within 7 years of surgery, the postoperative range of motion of the operated on hip joint was good, but residual pain existed. On the other hand, in the long-term follow-up cases of over 25 years, the postoperative range of motion was poor, but there was no pain. All patients in the latter group were satisfied with the operation.
