Bankart lesions represent traumatic detachments of the glenoid labrum [ 1 ] (Fig. 9.1 ). These lesions usually result from recurrent anterior shoulder dislocations causing anterior instability and mainly involve avulsions of the anteroinferior glenoid labrum at its attachment to the inferior glenohumeral ligamentous complex [ 2 , 3 ]. The inferior gleno-humeral ligament, which is attached medially to the inferior half of the anterior glenoid labrum, is the most important ligament stabilising the shoulder. At the time of the original injury, the humeral head is forced out anteriorly and inferiorly. By this mechanism it fi rst stretches the anterior capsule and the inferior glenohumeral ligament and second, as a result of traction, the fi brous labrum is pulled off from the inferior half of the anterior rim of the glenoid [ 4 ].