The purpose of this study was to evaluate the role of the tension on the long head of the biceps tendon in the propagation of SLAP tears by studying the mechanical behavior of the torn superior glenoid labrum. A previously validated finite element model was extended to include a glenoid labrum with type II SLAP tears of three different sizes. The strain distribution within the torn labral tissue with loading applied to the biceps tendon was investigated and compared to the inact and unloaded conditions. The anterior and posterior edges of each SLAP tear experienced the highest strain in the labrum. Labral strain increased with increasing biceps tension. This effect was stronger in the labrum when the size of the tear exceeded the width of the biceps anchor on the superior labrum. Thus, this study indicates that biceps tension influences the propagation of a SLAP tear more than it does the initiation of a tear. Additionally, it also suggests that the tear size greater than the biceps anchor site as a criterion in determining optimal treatment of a type II SLAP tear. (c) 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 33:1545-1551, 2015.
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机译：这项研究的目的是通过研究上颌盂盂唇撕裂的力学行为来评估二头肌腱长头上的张力在SLAP眼泪的传播中的作用。先前已验证的有限元模型已扩展为包括具有三种不同大小的II型SLAP眼泪的盂唇。研究了在二头肌腱上施加载荷的唇裂组织内的应变分布，并将其与未作用和未作用条件进行了比较。每个SLAP撕裂的前边缘和后边缘在唇唇中承受的应变最大。肱二头肌张力随着二头肌张力的增加而增加。当眼泪的大小超过上唇上的二头肌锚固宽度时，这种作用在唇上更强。因此，这项研究表明，二头肌张力对SLAP泪液的传播的影响比对泪液引发的影响更大。另外，它还表明，以大于二头肌锚定部位的泪液大小作为确定II型SLAP泪液最佳治疗的标准。 （c）2015骨科研究学会。由Wiley Periodicals，Inc.出版，J Orthop Res 33：1545-1551，2015。
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