Bankart or reverse Bankart injuries occur in the shoulder. They are usually the result of a traumatic injury leading to shoulder dislocation. About 95 percent of all shoulder dislocations occur in the forward (anterior) direction. The labrum is a rim of extra cartilage around the shoulder socket. It helps deepen the fairly shallow shoulder socket to keep the head of the humerus inside the cup. With a reverse Bankart, the shoulder dislocates in a backward direction (posteriorly). The back (posterior) portion of the labrum is torn or ruptured. This type of injury is rare.