股関節における三次元的被覆度と応力解析

抄録

We have been performing spherical acetabular osteotomy (SAO) for treating pre-and early coxarthrosis.
An assessment of the acetabular head coverage and stress distribution in SAO using a three-dimensional method was carried out.
We evaluated 59 patients (64 hips), 8 of whom were male and 51 female. The ages at the time of operation ranged from 13 to 63 years (mean, 30.5 years) and the mean follow-up period was 4.8 years.
The mean acetabular coverage improved from 38% preoperatively to 84.9% postoperatively. The mean preperative CE and Sharp angles improved from-10 and 52.6 degrees respechively to 34.8 and 40.5 degrees postoperatively. In the majority of SAO hips, acetabular coverage and stress distribution improved to reach almost normal values. In assessing pre-and postoprative status, analysis of the 3-D finite element method was useful, added to the 3-D acetabular coverage.