Acetabular dysplasia following closed reduction of developmental dislocation of the hip.

The purpose of this study was to determine the incidence of acetabular dysplasia following closed reduction of developmental dislocation of the hip, particularly as it relates to the age at reduction and the presence of the ossific nucleus. Thirty-five children with unilateral developmental dislocation of the hip underwent closed reduction. Medical records were reviewed for gender, side, age at reduction, use of Pavlik harness, prereduction traction, presence/absence of the ossific nucleus, and whether adductor longus tenotomy was performed. Acetabular index was measured. The mean age at reduction was 10 months. The mean length of follow-up was 91 months. Following closed reduction, the incidence of acetabular dysplasia was 69% (24 hips). No statistically significant relationship between acetabular dysplasia and age at reduction or presence of the ossific nucleus was demonstrated.