Use of the Endobutton in repair of the distal biceps brachii tendon
Robert G. Ranelle, DO
Rupture of the distal biceps tendon is a relatively uncommon injury. It typically occurs in middle-aged men who sustain a sudden force to a flexed arm. The resultant strong contraction of the biceps causes the tendon sheath to detach from the radial tuberosity. This injury represents only 3% of all injuries to the biceps tendon; 96% of such injuries involve the long head, and 1% involve the short head (1, 2). Several theories about predisposing factors have been postulated. These include avascularity of the tendon, mechanical impingement of the tendon with pronation of the forearm, degenerative changes within the tendon, and hypertrophic lipping of the anterior margin of the radial tuberosity, which can then cause a rent in the tendon (3, 4).
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