踝关节胫骨远端关节面缺损生物力学特征的三维有限元分析  

Biomechanical characteristics of distal tibial articular surface defect of the ankle joint: three-dimensional finite element analysis

作　　者：宋作成[1] 闫小龙[2] 

机构地区：[1]山东大学齐鲁医院南山分院,山东省临沂市265718 [2]山东中医药大学附属医院骨科,山东省济南市250014

出　　处：《中国组织工程研究》2016年第48期7212-7218,共7页Chinese Journal of Tissue Engineering Research

基　　金：河北省卫生厅2013年医学科学研究课题(20130192)~~

摘　　要：背景:研究发现三维有限元分析可以用于踝关节生物力学研究,但关于胫骨远端关节面缺损方面的研究不多。目的:对踝关节胫骨远端关节面缺损的生物力学特征进行三维有限元分析,为踝关节损伤相关疾病的发生机制提供依据。方法:建立踝关节的三维有限元模型,设定不同直径的胫骨远端关节面缺损,观察趾屈14°时载荷1 400 N胫骨远端关节面的应力峰值,中立位时载荷700 N胫骨远端关节面的应力峰值,背屈10°时载荷2 100 N胫骨远端关节面的应力峰值,以及胫骨远端关节面不同缺损直径时不同体位胫距关节面的接触面积。结果与结论:(1)载荷1 400 N趾屈14°:胫骨远端关节面前外象限应力峰值在关节面缺损直径为8 mm时最小,关节面缺损直径为16 mm时最大;前内象限应力峰值在关节面缺损直径为12 mm时最小,关节面缺损直径在16 mm时最大;后外象限应力峰值在关节面缺损直径为12 mm时最小;后内象限应力峰值在关节面缺损直径为0 mm时最小,关节面缺损直径为16 mm时应力峰值最大;(2)载荷700 N中立位时,胫骨远端关节面前外、前内、后外和后内象限应力峰值均随着关节面缺损直径的增加而增加,在关节面缺损直径为16 mm时4个象限的应力峰值最大;(3)载荷2 100 N背屈10°时在关节面缺损直径为16 mm时4个象限的胫骨远端关节面应力峰值均最大;(4)结果表明,胫骨远端关节面缺损直径不超过12 mm对踝关节功能的影响不大,胫骨远端关节面缺损直径超过12 mm时对踝关节功能的影响比较大。BACKGROUND： Studies found that three-dimensional finite element analysis can be used in the study of ankle biomechanics, but research on distal tibial articular surface defect was few. OBJECTIVE： To analyze the biomechanics of distal tibial articular surface defect with three-dimensional finite element, and provide the basis for mechanism of ankle injury related diseases. METHODS： We established ankle three-dimensional finite element model, and set different diameters of distal tibial articular surface defect, observed the peak stress of distal tibial articular surface at load of 1 400 N and the flexor of 14°, at load of 700 N and neutral position, at load 2 100 N and dorsiflexion of 10°, and contact area of tibial astragaloid joint surface at different postures and different defect diameters. RESULTS AND CONCLUSION：（1） At load of 1 400 N and plantar flexion of 14°, the distal tibial articular surface front quadrant stress peak was smallest when the distal tibial articular surface defect diameter was 8 mm, and was maximum when defect diameter was 16 mm; the distal tibial articular surface front inner quadrant stress peak was smallest when the distal tibial articular surface defect diameter was 12 mm, and maximum when defect diameter was 16 mm; the distal tibial articular surface posterior quadrant stress peak was smallest when defect diameter was 12 mm, distal tibial articular surface posterior inner quadrant stress peak was smallest when defect diameter was 0 mm; the distal tibial exterior stress peak was maximum when defect diameter was 16 mm.（2） At load of 700 N and neutral position, exterior front quadrant, front inner quadrant, posterior quadrant and posterior inner quadrant stress peaks increased with the distal tibial articular surface defect increases; the distal tibial articular surface defect stress peak was maximum when defect diameter was 16 mm.（3） At load of 2 100 N and dorsiflexion of 10°, the distal tibial articular surface stress peak was maximum when defect diameter was 16

关 键 词：踝关节 有限元分析 生物力学 组织工程 骨科植入物 数字化骨科 胫骨远端关节 关节面缺损 三维有限元 趾屈 背屈 

分 类 号：R318[医药卫生—生物医学工程]