腕关节软骨板生物力学特征研究被引量：4

Initial Research on the Biomechanical Features of the Triangle Fibrocartilage in Human Wrist

在线阅读下载PDF

导出

摘要目的：腕关节软骨板为桡尺远侧关节与腕关节共同拥有的结构，具有缓冲尺骨小头与腕骨间的直接压力，分散载荷等作用。该结构为纤维软骨，在运动中不断承受着来自各方向的拉伸、挤压、剪切等力量，容易发生急性损伤与慢性劳损。方法：通过对新鲜腕关节软骨板共计60个试件进行不同应变水平下的“应力松弛试验”和等应变速度下的“拉伸试验”，了解腕关节软骨板在承受一维拉伸破坏试验时的力学性质，并用拟线性粘弹性理论对试验结果进行分析，建立了腕关节软骨板的本构方程。结果：腕关节软骨板的应力松弛程度较低，初始应力松弛率在8％～15％左右；腕关节软骨板的本构方程为：腕骨面为：σ^e（ε）=1.111（e^1.923k-1），尺骨面为：σ^e（ε）=1.111（e^2.904ε-1）；腕关节软骨板腕骨面与尺骨面力学性能差异不大。结论：急性运动损伤及其慢性劳损的发生与软骨板的部位关系不大，主要与腕关节受到打击的角度、关节运动的幅度以及使关节运动的肌肉工作性质等有关。 The Fibrocartilage in the wrist joint is a structure common to the distal radioulnar joint and the wrist joint. It works to cache the direct pressure between the head of ulna and the wrist bones and to disperse the load. The structure is fibered soft bone and subject to urgent and chronic injury due to the stretch, pressure and shearing during movement. Therefore, it is significant for the further research on the physiological functionality and injury mechanism to obtain the biomechanical parameters of the fibrocartilage and relevant constitutive equation. In this research, sixty experimental pieces of fresh fibrocartilages are conducted on stress relaxation experiments at various strain level and stretch experiments at equal strain speed. In this way, it is learned of the mechanical features of the fibrocartilage under one dimensional destructive stretching experiments. The experimental results are analyzed using the virtual linear viscous theory and the constitutive equation is established for the fibrocartilage. The level of research on stress relaxation is low in the fibrocartilage, and the initial ratio of the stress relaxation is between 8% and 15 %. The constitutive equation is： For the wrist bone surface：σ^e（ε）=1.111（e^1.923k-1） , For the ulna bone surface ： σ^e（ε）=1.111（e^2.904ε-1）. The difference of the mechanical features between the wrist bone surface and the ulna surface is small. It concludes that the urgent and chronic injury is not quite related to the location of the fibrocartilage but much related to the striking angle, joint movement margin and the muscle working properties.

作者沙川华陈孟诗李雪

机构地区成都体育学院运动医学系四川大学力学系

出处《体育科学》 CSSCI 北大核心 2007年第7期51-54,共4页 China Sport Science

基金四川省体育局资助项目(05STK017)

关键词腕关节软骨板拉伸试验应力松弛试验本构方程 Fibrocartilage stretching test stress relaxation test constitutive equation

分类号 G804.6 [文化科学—运动人体科学]

作者简介沙川华（1958-），女，四川成都人，副教授，主要研究方向为运动解剖学，Tel：（028）85522373，E-mail：wangkangsha@sina．com。