Hill Sach's lesion is most commonly seen in-

This question is a tricky one. when you read the textbooks, it seems that the answer is anterior shoulder dislocation. Yes, Hill Sach's lesion is seen in an anterior shoulder dislocation. But, it is recurrent anterior shoulder dislocation. Hill--sack lesion is a compression fracture of the posterolateral articular surface of the humeral head. With the trauma of repeated dislocation, the humeral head is forced upon glenoid rim and the relatively soft bone of humeral head is crushed. The end result is an impression of the glenoid rim that is made on the humeral head.