Journal of shoulder and elbow surgery
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J Shoulder Elbow Surg · Mar 2009
The role of the elbow musculature, forearm rotation, and elbow flexion in elbow stability: an in vitro study.
The goal of this study was to define the relative passive contributions of the major muscle groups about the elbow to varus-valgus stability and to determine whether these contributions vary with forearm rotation and elbow flexion. Fourteen cadaveric upper extremities were tested with a custom elbow testing device. The biceps, brachialis, and triceps muscles were loaded to simulate passive tension. ⋯ Thus, the medial elbow musculature and lateral elbow musculature affect total elbow varus-valgus stability to roughly equal magnitudes, and the anterior bundle of the UCL affects stability to over twice the magnitude of either muscle group. The medial elbow musculature mostly affects elbow stability with the arm in supination and the lateral musculature in pronation, where the passive tension in the respective muscles is increased. Furthermore, the medial elbow musculature provided stability to the elbow when the forearm was supinated even with a deficient anterior bundle of the UCL, emphasizing its role as a secondary stabilizer.
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J Shoulder Elbow Surg · Mar 2009
Selective capsular repair for the treatment of anterior-inferior shoulder instability: review of seventy-nine shoulders with seven years' average follow-up.
Selective capsular repair for the treatment of antero-inferior shoulder instability gives satisfactory results at mid-range follow-up. ⋯ Level 4; Retrospective case series, no control group.