Transtrochanteric anterior rotational osteotomy of the femoral head in the treatment of osteonecrosis affecting the hip: a new osteotomy operation.

"Transtrochanteric anterior rotational osteotomy of the femoral head" is a new approach to the treatment of idiopathic avascular necrosis of the femoral head. The results of 41 hips with a follow-up suggest that the procedure prevents the progression of the collapse of the femoral head and preserves joint surfaces. Cases with extensive lesions and with bilateral involvement require long-term follow-up investigations in a large series of cases. This method does not preclude prosthetic replacement at a later date. The method is also applicable to the treatment of slipped capital femoral epiphysis, partial defects of the femoral head in weight-bearing area due to trauma and tumor and osteoarthritis of the hip with localized changes in weight-bearing area.