Anteroinferior Glenoid Labrum Lesion (Bankart Lesion)

Excerpt

The glenoid labrum is a fibrocartilaginous ring attached circumferentially to the glenoid rim contributing to the stability of the shoulder joint. The glenoid labrum increases the glenoid surface vertically by 75% and horizontally by 57%, according to Saha et al. Bankart's lesion represents an anterior and inferior labral detachment from the glenoid with an associated capsuloligamentous injury below the equator of the glenoid. This result in anterior instability of the shoulder joint due to the loss of the following normal mechanisms, such as the choke block effect of the labrum, concavity compression mechanism of the rotator cuff, and function of the inferior glenohumeral ligament. Traumatic subluxations or dislocations of the shoulder joint cause injury to the glenoid labrum. Almost 87 to 100% of the index anterior shoulder dislocations are associated with Bankart lesions.