Changes in soft tissue interposition after reduction of developmental dislocation of the hip.

Changes occurring in soft tissue interposition in 111 cases of developmental dislocation of the hip (DDH) reduced by overhead traction (OHT) were assessed by arthrogram. Soft tissue interposition was classified into five types based on the shape of the limbus, and changes in tissue thickness in the acetabular floor were examined. Thickness of soft tissue interposition was in the normal range in 92 hips of 111 hips (82.9%), but in hips in which a thick pad of the soft tissue was apparent at the acetabular floor both in the dislocated and reduced positions, soft tissue did not recede in 61.5% of hips.