Anterior and posterior displacement of the hip after innominate osteotomy.

Ten patients were treated for anterior or posterior displacement of the hip after an innominate osteotomy for congenital dislocation of the hip. All required a repeated open reduction with an additional procedure, either at the same time as reduction or as a second stage. Stable reduction was achieved in eight cases, but in two the initial attempt failed and the operation had to be repeated. The clinical features of hips with this complication are described and the technique of the salvage operation is discussed.