الفهرس 
Introduction & Aim of the workOnly 14 pages are availabe for public view
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Abstract
The elbow is a complex and critical link in the upper extremity, as a nonfunctional elbow is extremely limiting to the activities of daily living [13].
Elbow stability is created by a combination of factors. The osseous congruency of the ulnotrochlear and radiocapitellar joints contributes to overall elbow stability. The dynamic muscular forces provided by the biceps, brachialis, triceps, and wrist extensors interacting to center joint forces within the available articular arc via a concavity compression mechanism also contribute to stability. The lateral collateral ligament complex is torn with most elbow dislocations and is the primary stabilizer to varus stress. The radial head and coronoid also play a critical role in stability by providing an osseous buttress [15,19,27].PLI is the most common pattern of elbow instability, and it occurs as a result of axial load, valgus force, and supination of the forearm (which can be relative, due to internal rotation of the humerus on a fixed forearm). The radius and ulna subluxate off the humerus, whereas the radioulnar joint remains reduced [1,3,5].Although there are patients who present soon after an acute traumatic injury, many patient present with chronic PLI in delayed fashion with pain and mechanical symptoms such as locking, catching, or clicking [7].