Orthopaedic Biomechanics Laboratories, College of Osteopathic Medicine, Michigan State University, East Lansing, MI 48824, USA.
Ann Biomed Eng. 2011 Feb;39(2):756-65. doi: 10.1007/s10439-010-0234-9. Epub 2010 Dec 18.
Recent studies, using two different manners of foot constraint, potted and taped, document altered failure characteristics in the human cadaver ankle under controlled external rotation of the foot. The posterior talofibular ligament (PTaFL) was commonly injured when the foot was constrained in potting material, while the frequency of deltoid ligament injury was higher for the taped foot. In this study an existing multibody computational modeling approach was validated to include the influence of foot constraint, determine the kinematics of the joint under external foot rotation, and consequently obtain strains in various ligaments. It was hypothesized that the location of ankle injury due to excessive levels of external foot rotation is a function of foot constraint. The results from this model simulation supported this hypothesis and helped to explain the mechanisms of injury in the cadaver experiments. An excessive external foot rotation might generate a PTaFL injury for a rigid foot constraint, and an anterior deltoid ligament injury for a pliant foot constraint. The computational models may be further developed and modified to simulate the human response for different shoe designs, as well as on various athletic shoe-surface interfaces, so as to provide a computational basis for optimizing athletic performance with minimal injury risk.
最近的研究使用两种不同的足部约束方式，盆栽和粘贴，记录了在受控的足部外部旋转下，人体尸体踝关节的失效特征发生了变化。当足部被盆栽材料约束时，后距腓韧带（PTaFL）通常会受伤，而对于粘贴的足部，三角韧带受伤的频率更高。在这项研究中，验证了一种现有的多体计算建模方法，以包括足部约束的影响，确定足部外部旋转下关节的运动学，从而获得各种韧带的应变。假设由于过度的外部足部旋转而导致的踝关节损伤的位置是足部约束的函数。该模型模拟的结果支持了这一假设，并有助于解释尸体实验中的损伤机制。对于刚性足部约束，过度的外部足部旋转可能会导致 PTaFL 损伤，对于柔软的足部约束，则可能会导致前三角韧带损伤。计算模型可以进一步开发和修改，以模拟不同鞋类设计以及各种运动鞋表面界面的人体反应，从而为优化运动表现提供计算基础，同时最大限度地降低受伤风险。
