Tomomi Matsuoka

Follow-up studies for Femoral Head Replacement

We examined the clinical and radiographic results of femoral head replacement. We studied a group of 46 patients, 47 joints (18 males and 28 females) consisting of 35 cases of femoral medial neck fracture, 10 cases of avascular necrosis of the femoral head and 2 cases of coxarthrosis. They were treated by femoral head replacement during 1977-1996 and were typed as follows: Austin-Moore (5 cases), Harris-Galante (2 cases), Omnifit (4 cases), Omniflex (6 cases) and HA-TCP (30 cases). Age distribution of these cases were 18 to 89 years (mean: 67.9 years), and they were followed from 1 year to 19 years and 9 months (mean: 4 years and 7 months). The mean postoperative JOA score was 80.0 points (Moore: 76.6, H/G: 75, Omnifit: 76, Omniflex: 75.5, HA-TCP: 81). Radiographically, loosening was frequently seen in all patients except HA-TCP type.

The Results of Valgus Osteotomy for Osteoarthrosis of the Hip

Forty-seven patients (50 hips) with osteoarthrosis were treated with valgus osteotomy. The mean follow-up period was 4 years and 10 months. According to the JOA score, the preoperative scores (mean, 53.3 points) improved postoperatively (mean, 84 points). For the best result it is necessary that the incongruity be improved by a valgus osteotomy and the weight-bearing area be enlarged by a shelf operation.