Anterior glenohumeral stabilization factors: Progressive effects in a biomechanical model
Anterior glenohumeral stabilization factors: Progressive effects in a biomechanical model
复制标题
DOI：
10.1002/jor.1100140217
复制
发表时间：
1996-03-01
影响因子：
2.8
通讯作者：
Shyr, Y
中科院分区：
文献类型：
--
作者：
Malicky, DM;Soslowsky, LJ;Shyr, Y
本研究的目的是评估盂肱关节在一系列平移过程中的前稳定因素。检查的稳定肌包括囊韧带、喙肱韧带、肩袖肌肉和二头肌长头。对八个肩部标本施加模拟肌肉力，使手臂在肩胛平面内总抬高 90 度。稳定性，定义为达到指定半脱位所需的力。然后在不同的囊切割、肱骨旋转和肌肉负荷配置下进行评估。研究发现，半脱位的总体力-位移关系在外旋时呈指数增加，在位移 10 毫米时达到 239 N，在中性旋转时趋于平稳，在位移 10 毫米时达到 172 N。在肌肉中，二头肌是中立旋转时最重要的稳定肌，提供超过 30 N 的稳定力：肩胛下肌在外旋时提供最大程度的稳定力，增加到约 20 N。肩胛下肌和冈上肌在两种类型的旋转中始终是最重要的稳定肌。在外旋中，上、中、下盂肱韧带是最有效的韧带稳定器，并且随着达到更高的位移，所有韧带都逐渐提供更多的稳定性。一些韧带提供的稳定性在 10 毫米位移时达到近 50 N。
The aim of this study was to evaluate the anterior stabilizing factors of the glenohumeral joint over a range of translations. The stabilizers examined included the capsular ligaments, the coracohumeral ligament, the rotator cuff muscles, and the long head of the biceps. Simulated muscle forces were applied to eight shoulder specimens to produce 90 degrees of total elevation of the arm in the scapular plane. Stability, defined as the force required to reach a specified subluxation. then was evaluated under varying configurations of capsule cuts, humeral rotation, and muscular loads. The overall force-displacement relationship of the subluxation was found to increase exponentially in external rotation to 239 N at 10 mm of displacement and to level off in neutral rotation to 172 N at 10 mm of displacement. Among the muscles, the biceps was the most important stabilizer in neutral rotation, providing more than 30 N of stabilization: the subscapularis provided the greatest degree of stabilization in external rotation, increasing to approximately 20 N. The subscapularis and supraspinatus were the most consistently important stabilizers in both types of rotation. In external rotation, the superior, middle, and inferior glenohumeral ligaments were the most effective ligamentous stabilizers, and all provided progressively more stabilization as higher displacements were reached. The stability provided by some of the ligaments reached nearly 50 N at 10 mm of displacement.