Developmental dysplasia of the hip, DDH, (Hip dysplasia) may present with hip dislocation, subluxation or acetabular dysplasia. Untreated acetabular dysplasia is the most common cause of secondary osteoarthrosis arising from pathological joint loading forces. Pelvic osteotomies have been introduced to improve the abnormal anatomical condition and reduce the load across the hip joint. Either the pelvic osteotomy increase the femoral head coverage by augmentation of the acetabular roof (Chiari, Shelf ordome shaped), it changes the spatial orientation of the acetabulum (salter, triple, double, spherical and bernese) or changing the shape of the acetabulum (pemperton and dega).