Total Hip Replacement in Unreduced Hip Dislocation / 대한정형외과학회잡지

ABSTRACT

Total hip arthroplasty in patients with chronically dislocated hips poses many challenging technical problems. Abnormal relationship of bones and soft tissues occurs in chronic complete dislocation of the hip (grade IV, Crowe's classification). Problems in placing the acetabular component in the true acetabulum include, first how to cover the acetabular component sufficiently, second how to fix it securely and last how to avoid excessive stretching of the neurovascular structures such as the sciatic nerve. The authors have introduced a technique of one stage distal femoral shortening in order to avoid excessive stretching of the neurovascular structures. From December 1988 to May 1996, the total hip arthroplasties combined with one stage distal femoral shortening were carried out in chronic complete dislocation of 44 hips (grade IV, Crowe's classification) and followed-up more than two years. This method has several advantages It preserves wide and healthy proximal metaphysis of the femur, does not need greater trochanteric osteotomy, and provides many chances to choose the appropriate stem size and shape, especially in cementless total hip arthroplasty.