摘要
目的建立骨质疏松症全髋关节有限元模型,分析了运动荷载作用下髋关节平均刚度情况。方法对1名患有腰痛病的中老年女性志愿者的髋关节进行双能X线扫描记录其骨密度,同时进行CT扫描成像,应用CAD造型软件minics10.1、magics13.0软件和abaques 6.9软件,采用四面体网格划分方法,对髋关节周围组织赋予不同的材料特性,引入接触理论和非线性结构计算方法,建立骨质疏松症全髋关节有限元模型。在所建模型上加载模拟髋关节的前屈、后伸、左右侧屈、左右旋转6种工况下的生理活动。将其赋于生物力学参数值,经模拟施行纵向生理性载荷加压后观察髋关节各部位应力特性的变化。结果骨质疏松中老年妇女髋关节的三维有限元分析表明皮质骨应力水平较高,但各部位存在不均一性;小梁骨应力水平较骨皮质低。结论建立了骨质疏松中老年妇女全髋关节三维有限元模型,此模型可用来进行骨质疏松性髋关节应力分布情况的活体分析。
Objective To establish finite element model for osteoporotic total hip joint and to analyze the average stiffness of hip load in sports. Methods The BMD of hip joint of an elderly female volunteer with twist pain was measured and recorded using the dual-X-ray scan. CT scan was conducted at the same time. finite element model for osteoporotic total hip joint was established using four-side mesh dividing method with CAD model software mieincs 10. 1, magics 13.0, and abaqus 6. 9 software, to characterize adjacent tissues of hip joint with different material and to induce the contact theory and non-linear structure ealeulation method. Six physiological activities were loaded in this model to simulate flexion/extension, left/right bending, and rotating of the hip joint. The biomeehanical parameters were also loaded in this model. The variation of force features of total hip joint was observed after stimulate vertical physiological pressure was loaded. Results The three dimensional finite element analysis showed that the stress level of cortical bone was high in the hip joint of elderly females. However, it was not equal among different sites. The stress level of trabecular bone was lower than that of cortical bone. Conclusion The three-dimensional finite element total hip joint model for elderly female osteoporosis patients is established. And this model ean be used for active analysis of stress distribution of osteoporotic hip.
出处
《中国骨质疏松杂志》
CAS
CSCD
2011年第11期989-992,共4页
Chinese Journal of Osteoporosis
基金
三峡大学第一临床医学院科研发展基金项目(KFJ2009025)
作者简介
通讯作者：覃勇，Email：ycqinyong@sina．com
