Gibson posterolateral approach to hip joint. A, Skin incision. B, Anterior and posterior muscle masses have been retracted to expose greater trochanter and muscles that insert into it. C, Gluteus medius and minimus have been divided near their insertions into greater trochanter and retracted. Incision in capsule is shown. D, Hip joint has been dislocated by flexing, abducting, and externally rotating thigh. SEE TECHNIQUE 1.72.