We report the six-year results of a prospective, controlled demographic trial of developmental dysplasia of the hip (DDH) treated in the Pavlik harness using ultrasound supervision. Our aim was to assess the value of ultrasound and its role in monitoring reduction in the harness, in terms of progression or failure of reduction at an early state. We conclude that ultrasound monitoring has led to an acceptably low level of intervention, a high reduction rate and minimal iatrogenic complications. The trial is continuing. [Br] 1997;79-B:719-23. Received 10 February 1997; Accepted after revision 28 April 1997 Pavlik 1 developed his 'functional method' for treatment of congenital dislocation of the hip because of the high rates of 'aseptic necrosis' that he had observed from the use of 'passive mechanical methods'. His method is now widely used, but recent reports quote rates of aseptic necrosis of from 0% to 28%.
J Bone Joint Surg