Dislocation of the Hip
A hip dislocation occurs when the top of the femur (thigh bone) slips out of its socket (acetabulum). The acetabulum is a part of the pelvis.
The hip joint, in a normal adult, is a very stable joint due to its shape and the strong ligaments surrounding it. It usually takes tremendous force to dislocate a hip joint, such as in a severe motor car or motorbike accident.
People who have had a total hip replacement can also dislocate their hip. In this situation, less force may be required and sometimes by just bending over or twisting improperly the hip can dislocate.
Hip dislocations can either occur to the front (anterior) or to the back (posterior). Most hips dislocate to the back.
Some children are born with dislocated hips in a disorder called Developmental Dysplasia of the Hip (DDH).