The Hill-Sachs fracture results from anterior dislocation of the humeral head and is located on the posterolateral aspect of the humeral head. 97 % of shoulder dislocations are anterior in direction. This fracture is produced when the humeral head strikes the inferior margin of the glenoid. The dislocation may also cause a Bankart fracture at the impact site on the glenoid. Anterior dislocations are produced by complex forces acting on the humerus, including abduction and external rotation.
AP radiograph of the shoulder. The arrows indicate the defect on the posterolateral aspect, corresponding to a Hill-Sachs fracture.
