COLONNA ARTHROPLASTY WITH CONCOMITANT FEMORAL SHORTENING AND ROTATIONAL OSTEOTOMY - LONG-TERM RESULTS

The results of Colonna capsular arthroplasty in twenty-two hips in twe nty patients were reviewed, All twenty patients were at least eve year s old at the time of the operation, which was performed for either com plete dislocation or marked subluxation of the hip, None were candidat es for reconstructive procedures designed to preserve articular cartil age. The mean age at the time of the Colonna arthroplasty was nine yea rs and three months (range, live years to fifteen years and two months ), and the mean duration of follow-up was sixteen years (range, six to thirty-two years), At the most recent follow-up examination, the mean Harris hip score, for the twenty-one hips for which it was available, was 82 points (range, 52 to 98 points), the patients had improved gai t, and there was marked improvement in the radiographic appearance of the hip according to tile classification system of Severin. Thirteen h ips in twelve patients had concomitant femoral shortening and rotation al osteotomy at the time of the Colonna arthroplasty, and none of thes e patients who did not have evidence of avascular necrosis of the capi tal femoral epiphysis preoperatively had it postoperatively. Three hip s that did not have concomitant femoral shortening had evidence of new -onset avascular necrosis after the Colonna arthroplasty. Concomitant femoral shortening and rotational osteotomy allowed the operation to b e performed without preoperative traction, dramatically reduced the ne ed for a subsequent rotational femoral osteotomy, and reduced the prev alence of postoperative avascular necrosis of the capital femoral epip hysis.