Various surgical techniques are used for the treatment of hip dysplasia in young people and adults. In contrast to acetabuloplasty in children, the position of the complete acetabulum is corrected. The repositioning serves to enlarge the weight bearing zone of the dysplastic acetabulum covering the femoral head, in order to reduce pressure on this area to physiological levels. The major goals of this therapy are relief from pain as well as preventing premature osteoarthritis with the necessity for artificial hip replacement. The basics of the biomechanics as well as diagnosis and indications are described and discussed in detail elsewhere [9,11]. Apart from the triple osteotomy according to Tönnis, practiced by our clinic since more than 15 years, particular mention should be made of the periacetabular osteotomy technique described by Ganz [3]. In contrast, the spherical osteotomy procedure of Wagner [12] has not become established due to the danger of acetabular necrosis.