A simulation approach for mechanical stresses on repaired tendons in patients after rotator cuff tears: A biomechanical study on how to assist in preventing retears

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  • 肩腱板断裂後患者の修復腱にかかる力学的ストレスへのシミュレーションアプローチ――再断裂リスク軽減にむけた援助方法のバイオメカニクス的検討――
  • ケンケンバンダンレツコウカンシャ ノ シュウフクケン ニ カカル リキガクテキ ストレス エ ノ シミュレーションアプローチ : サイダンレツリスク ケイゲン ニ ムケタ エンジョ ホウホウ ノ バイオメカニクステキ ケントウ

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Abstract

<p>[Objective] We created a shoulder rotator cuff tear model using musculoskeletal simulation software and estimated the mechanical stress on the repaired tendon in a limb position that mimics assistance upon removing the orthosis. [Methods] The software we used was the AnyBody Modeling System. The outcome was the tendon tension of the supraspinatus, infraspinatus, subscapularis, psoas, deltoid, and trapezius muscles. Limb positions simulating the assistance were assistance on the limb position, site, force applied, and 72 patterns of the shoulder joint model. [Results] In the supraspinatus muscle, tendon tension decreased as the amount of assistance increased, regardless of the assistance method. The tendon tension of the infraspinatus muscle decreased when supporting the distal ulna. [Discussion] Assuming the moment of the shoulder joint from the weight of the upper limb and the direction of the assistance can estimate the tendon tension of the repaired tendon.</p>

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