“…Higher hip flexion and adduction at the time of trauma are associated with simple dislocation, whereas less adduction or less internal rotation is associated with a fracture-dislocation of the posterior acetabular wall [12]. Recently, however, several studies described an association between femoral acetabular impingement (FAI) morphology and traumatic posterior dislocation of the hip [4,5,11,13,14,16,17,19,22,30]. In hips with camtype and pincer-type FAI morphology, the femoral headneck junction impacts against the anterior acetabulum with hip flexion, adduction, and internal rotation.…”