Late complication of Acetabular fracture
Avascular necrosis - osteonecrosis of the femoral head may occur even if the hip is not fully dislocated. 
The condition is probably overdiagnosed because of an erroneous interpretation of x-ray appearance following impacted marginal fractures of the acetabulum.
Other complications : *iliofemoral venous thrombosis *sciatic nerve injury *heterotopic bone formation *loss of joint movement & secondary osteoarthritis
Avascular necrosis of lilac crest
Avascular necrosis of head of femur
Fixed deformity of the hip joint
Secondary osteoarthritis of hip joint