Fig. 1From: Characteristics of the patellofemoral joint of patients with DDH and the effects of Bernese periacetabular osteotomy on the patellofemoral jointA perpendicular line has been drawn from the AIIS to the iliac ischial line. The distance from the AIIS to the iliac ischial line was measured. The postoperative distance minus the preoperative distance is the displacement of the AIIS (DAIIS). AIIS: anterior inferior iliac spineBack to article page