Fig. 1.

Biomechanics of the Hill-Sachs lesion and Hill-Sachs remplissage. Fig. 1-A Impaction of the posterior aspect of the humeral head on the anterior glenoid rim produces the engaging Hill-Sachs lesion. Fig. 1-B Recurrence of anterior instability despite anterior Bankart repair because of engagement of the large Hill-Sachs lesion on the anterior glenoid rim. Fig. 1-C The transfer (and healing) of the capsule and infraspinatus tendon into the bone defect has the dual effects of (1) rendering the humeral osseous lesion extra-articular (exclusion effect) and (2) decreasing anterior translation (checkrein effect).