a) This is a x-ray of a 48 year old motor cyclist, who suffered an accident with a both column acetabular fracture accompanied by a pelvic ring injury. Due to a massive soft tissue involvement of the pelvis and prolonged wound healing, an isolated ilio-inguinal approach was applied to reduce and stabilize the fracture. Therefore a nonanatomical reduction had to be accepted. b) X-ray 4 months after surgery. The combination of great initial displacement and nonanatomical reduction led to a rapid joint degeneration with poor clinical function.