[Surgical treatment of residual congenital dysplasia with dislocation of the hip joint after treatment with the Frejka pillow].

The characteristics of patients and the radiological condition of hip joints that required surgery because of residual dysplasia in the course of growth after treatment by the Frejka pillow have been presented. That treatment was employed in 4 per cent of the treated hips. The operations consisted in inspection of the joint, transiliac osteotomy after Dega with subtrochanteric osteotomy with detorsion of the femur, of the same type of operation without opening of the joint, performance of only transiliac osteotomy or only subtrochanteric osteotomy. Because late evaluation at over 10 years of life revealed 5 per cent of hips with poor rebuilding that should be treated surgically, it has been determined that the total number of cases requiring surgery after treatment by the Frejka pillow is 9 per cent.