Yang Nicholas H, Canavan Paul K, Nayeb-Hashemi Hamid
Mechanical and Industrial Engineering Dept., Northeastern University, Boston, MA, USA.
J Appl Biomech. 2010 Nov;26(4):432-43. doi: 10.1123/jab.26.4.432.
Subject-specific models were developed and finite element analysis was performed to observe the effect of the frontal plane tibiofemoral angle on the normal stress, Tresca shear stress and normal strain at the surface of the knee cartilage. Finite element models were created for three subjects with different tibiofemoral angle and physiological loading conditions were defined from motion analysis and muscle force mathematical models to simulate static single-leg stance. The results showed that the greatest magnitude of the normal stress, Tresca shear stress and normal strain at the medial compartment was for the varus aligned individual. Considering the lateral knee compartment, the individual with valgus alignment had the largest stress and strain at the cartilage. The present investigation is the first known attempt to analyze the effects of tibiofemoral alignment during single-leg support on the contact variables of the cartilage at the knee joint. The method could be potentially used to help identify individuals most susceptible to osteoarthritis and to prescribe preventive measures.
开发了特定个体模型并进行了有限元分析，以观察额状面胫股角对膝关节软骨表面的正应力、特雷斯卡剪应力和正应变的影响。针对三名具有不同胫股角的受试者创建了有限元模型，并根据运动分析和肌肉力量数学模型定义了生理负荷条件，以模拟静态单腿站立。结果表明，内翻对齐个体在内侧间室的正应力、特雷斯卡剪应力和正应变的最大值最大。考虑外侧膝关节间室，外翻对齐个体在软骨处的应力和应变最大。本研究是首次分析单腿支撑期间胫股对齐对膝关节软骨接触变量影响的已知尝试。该方法可能潜在地用于帮助识别最易患骨关节炎的个体并制定预防措施。
