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首页> 外文期刊>Journal of Biomechanics >Mechanics of the anterior drawer test at the ankle: the effects of ligament viscoelasticity
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Mechanics of the anterior drawer test at the ankle: the effects of ligament viscoelasticity

机译：脚踝前抽屉试验的力学：韧带粘弹性的影响

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The anterior drawer test at the human ankle joint is a routine clinical examination. The relationship between the mechanical response of this joint and the flexion angle was elucidated by a recent mathematical model, using purely elastic mechanical characteristics for the ligament fibres.The objective of the present work was to assess the effect of ligament viscoelasticity on the force response of the ankle joint for anterior displacements of the foot relative to the tibia, at different ankle flexion positions. A viscoelastic model of the ligaments from the literature was included in the recently proposed mathematical model. Drawer tests were simulated at several flexion angles and for increasing velocities of the imposed anterior displacement.The stiffness of the model ankle joint increased only modestly with velocity. The response force found for a 6 min displacement at 20 degrees plantarflexion increased by only 13% for a one hundred-fold increase in velocity from 0.1 to 10mm/s. The flexion angle was confirmed as the most influential parameter in the mechanical response of the ankle to anterior drawer test. (c) 2004 Elsevier Ltd. All rights reserved.
机译：人脚踝关节的前抽屉测试是常规的临床检查。利用韧带纤维的纯弹性力学特性，通过最近的数学模型阐明了该关节的力学响应与屈曲角的关系。本研究的目的是评估韧带粘弹性对肌腱力反应的影响。脚踝关节，用于在不同的踝关节屈曲位置使脚相对于胫骨向前移位。最近提出的数学模型包括文献中韧带的粘弹性模型。在几个屈曲角度模拟了抽屉试验，以提高施加的前移速度。模型踝关节的刚度仅随速度适度增加。在20度足底屈曲6分钟位移时发现的响应力仅增加了13％，速度从0.1毫米/秒增加到100毫米/秒，增加了100倍。在踝关节对前抽屉试验的机械反应中，屈曲角被确认为最有影响力的参数。 （c）2004 Elsevier Ltd.保留所有权利。

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