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首页> 外文期刊>Journal of orthopaedic research >Effect of glenohumeral abduction angle on the mechanical interaction between the supraspinatus and infraspinatus tendons for the intact, partial-thickness torn, and repaired supraspinatus tendon conditions.
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Effect of glenohumeral abduction angle on the mechanical interaction between the supraspinatus and infraspinatus tendons for the intact, partial-thickness torn, and repaired supraspinatus tendon conditions.

机译：对于完整，部分厚度撕裂和修复的上棘腱情况，盂肱外展角度对上棘与腓下肌肌腱之间机械相互作用的影响。

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摘要

Rotator cuff tears are difficult to manage because of the structural and mechanical inhomogeneity of the supraspinatus tendon. Previously, we showed that with the arm at the side, the supraspinatus and infraspinatus tendons mechanically interact such that conditions that increase supraspinatus tendon strain, such as load or full-thickness tears, also increase infraspinatus tendon strain. This suggests that the infraspinatus tendon may shield the supraspinatus tendon from further injury while becoming at increased risk of injury itself. In this study, the effect of glenohumeral abduction angle on the interaction between the two tendons was evaluated for supraspinatus tendon partial-thickness tears and two repair techniques. Principal strains were quantified in both tendons for 0 degrees , 30 degrees , and 60 degrees of glenohumeral abduction. Results showed that interaction between the two tendons is interrupted by an increase in abduction angle for all supraspinatus tendon conditions evaluated. Infraspinatus tendon strain was lower at 30 degrees and 60 degrees than at 0 degrees abduction angle. In conclusion, interaction between the supraspinatus and infraspinatus tendons is interrupted with increase in abduction angle. Additionally, 30 degrees abduction should be further evaluated for management of rotator cuff tears and repairs as it is the angle at which both supraspinatus and infraspinatus tendon strain is decreased.
机译：由于肩c上肌腱的结构和机械不均匀性，肩袖撕裂很难处理。先前，我们显示了手臂在侧面时，棘上肌和肌腱下肌腱机械相互作用，从而增加脊肌上肌腱应变的条件（例如负荷或全层撕裂）也增加了肌下肌腱应变。这表明，鼻下肌腱可保护上棘肌腱免受进一步的伤害，同时增加受伤本身的风险。在这项研究中，针对肱骨上肌腱部分厚度撕裂和两种修复技术，评估了肱肱骨外展角对两条腱之间相互作用的影响。定量确定了在两个肌腱中盂肱外展度分别为0度，30度和60度的主要应变。结果表明，在评估的所有棘上肌腱状况下，外展角度的增加会中断两个肌腱之间的相互作用。膝下肌腱应变在30度和60度时比0度外展角低。总之，随着外展角的增加，上棘和肌腱下肌腱之间的相互作用被中断。此外，应进一步评估30度外展度以控制肩袖撕裂和修复，因为这是腕上肌和脊柱下肌腱张力均降低的角度。

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