[Chiari's osteotomy in the treatment of coxarthrosis in adults. Apropos of 39 cases].

The authors have reviewed 39 Chiari pelvic osteotomies for hip arthrosis in adults. The surgical technique was found to be difficult and several modifications have been made during the last ten years. The complication rate was high initially but improved later thanks to technical improvements. However, the overall results were very satisfactory as regards both function and radiological appearances. Improved coverage of the femoral head was usually obtained when the operation was performed correctly and pain was diminished in two-thirds of the patients. The results were less satisfactory as regards gait, hip movement and the radiological joint space. In 13 cases a femoral osteotomy was made in association with Chiari pelvic osteotomy without any special complications.