Which implant for proximal femoral osteotomy in children? A comparison of the AO (ASIF) 90 degree fixed-angle blade plate and the Richards intermediate hip screw.

We reviewed the clinical and radiologic results of 164 proximal femoral osteotomies in 132 children using the AO (ASIF) 90 degree fixed-angle blade plate and the Richards intermediate hip screw to establish the clinical and radiologic outcomes, establish the incidence of complications, and determine the relative indications and contraindications for the two implants. The incidence of complication in this series was 9% (15 complications in 14 osteotomies in 13 patients) including one bursitis, one wound breakdown with exposure of the underlying plate, five infections, two peroneal nerve palsies, one fractured shaft of femur, one fractured neck of femur, two technical errors, one painful nonunion, and one loss of fixation. There were five (3%) revisions in total. Fifty-six osteotomies in 44 patients were performed using the Richards intermediate hip screw, and 108 osteotomies were performed in 88 patients using the AO 90 degree fixed-angle blade plate. We found that both implants were effective with an acceptable rate of complications and revision surgery.