In hip dysplasia the acetabulum presents as shallow and oblique with insufficient coverage of the femoral head. Deformity of the femoral neck and head is common with bilateral affection in 54%. The lack of congruence between the acetabulum and femoral head compromise the passive stability of the hip joint resulting in increased increased stress on the acetabular labrum, joint capsule and the muscles acting close to the hip joint. The increased stress on soft tissue results in acetabular labrum injury in 49-94% of the patients with hip dysplasia scheduled for joint preserving surgery. Left untreated hip dysplasia may lead to development of early osteoarthritis; however, the osteoarthritic process can be prevented or delayed with the Periacetabular osteotomy (PAO).