From June 1983 up to the end of 2000, we performed Chiari’s osteotomy at 61 dysplastic hips in 54 women from 18 – 53 years (M.A. 35 years). In 47 cases, the osteotomy was performed at left and in 14 at right hip. In all cases the angle CE was measured preoperatively and after the operation.

The angle was measured from −20° up to +18° (Mean 13°), preoperatively. The increase of the CE angle means better covering of femoral head, improvement of hip function for the many years and creation of good anatomic conditions in acetabulum for hip replacement in the future.