APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -In approximately 90% of hip dislocation patients, the femur is pushed out of the socket in a backward direction. This is called a posterior dislocation.

Detailed explanation-2: -Hip dislocations are classified by fracture association and by the positioning of the dislocated femoral head. A posteriorly positioned head is the most common dislocation type.

Detailed explanation-3: -Posterior dislocations constitute approximately 80-90% of hip dislocations caused by motor vehicle accidents. The femoral head is situated posterior to the acetabulum. During a motor vehicle crash, force is transmitted to the flexed hip in 1 of 2 ways.

Detailed explanation-4: -Most hip dislocations are posterior, most commonly due to impaction of the knee against a car dashboard with the hip flexed [6]. Anterior hip dislocations are usually caused by forced hip abduction and external rotation [8].