[Chiari's osteotomy in adults--apropos of 70 cases].

Between 1975 and 1987, 83 Chiari osteotomies were performed on 49 women and 11 men. The osteotomy was bilateral in 5 cases. The average age was 34 years. The average follow-up was 4 years with a range of 1 to 12 years. In 65 patients there was acetabular dysplasia, associated in 26 cases with coxa valga and, in one patient, with coxa vara. In 12 cases there was a subluxation of the femoral head, greater than 15 mm and in 16 cases, the femoral head was deformed after a post-reductional osteochondritis. The technique and results are discussed.