The mechanical consequences of dynamic frontal plane limb alignment for non-contact ACL injury
The mechanical consequences of dynamic frontal plane limb alignment for non-contact ACL injury
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DOI：
10.1016/j.jbiomech.2004.11.013
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发表时间：
2006-01-01
影响因子：
2.4
通讯作者：
Andriacchi, TP
中科院分区：
文献类型：
--
作者：
Chaudhari, AM;Andriacchi, TP
本研究调查了支撑肢体的动态额状面对齐差异的机械后果，以及髋关节和踝关节的预期肌肉激活对减少单肢着陆期间非接触性ACL损伤的可能性的影响。使用额面三连杆被动动力学模型来估计ACL非接触性损伤阈值。该阈值被定义为关节内侧或外侧打开8度之前膝关节能够承受的最大轴向力，这被认为足以造成损伤。肢体排列和髋关节和踝关节肌肉收缩是不同的，以确定其对ACL损伤阈值的影响。外翻或内翻对线与中性对线相比降低了损伤阈值，但增加髋关节外展和内收肌群的预期收缩增加了损伤阈值。增加预期踝关节内翻/外翻肌肉收缩没有影响。本研究为以下结论提供了力学依据：落地期间中性肢体对线（与外翻或内翻相比）和落地前增加髋关节肌肉收缩（外展肌/内收肌）可通过外翻或内翻打开机制降低ACL断裂的可能性。(C)2004爱思唯尔有限公司保留所有权利。
This study investigated the mechanical consequences of differences in dynamic frontal plane alignment of the support limb and the influence of anticipatory muscle activation at the hip and ankle on reducing the potential for non-contact ACL injury during single-limb landing. A frontal plane, three-link passive dynamic model was used to estimate an ACL non-contact injury threshold. This threshold was defined as the maximum axial force that the knee could sustain before the joint opened 8 degrees either medially or laterally, which was deemed sufficient to cause injury. The limb alignment and hip and ankle muscle contractions were varied to determine their effects on the ACL injury threshold. Valgus or varus alignment reduced the injury threshold compared to neutral alignment, but increasing the anticipatory contraction of hip abduction and adduction muscle groups increased the injury threshold. Increasing anticipatory ankle inversion/eversion muscle contraction had no effect. This study provides a mechanical rationale for the conclusion that a neutral limb alignment (compared to valgus or varus) during landing and increasing hip muscle contraction (abductors/adductors) prior to landing can reduce the possibility of ACL rupture through a valgus or varus opening mechanism. (C) 2004 Elsevier Ltd. All rights reserved.