The term acetabuloplasty summarizes different surgical techniques - are just under the overall heading of pelvic - for surgical treatment of hip dysplasia (HD) in childhood application. These include some technically very similar operations, such as the osteotomy Lance, according to Pemberton or Dega. The Salter osteotomy is one - in the broad sense - even to the group of Acetabuloplastiken, but differs in approach very different from all the procedures. The aim of this operation is to produce the lateral and anterior acetabular epiphysis then again, that the femoral head is a physiological roofing. The earlier the operation (for a given indication) is performed, the greater the likelihood that growing up hip and femoral neck normally.