Effect of lumbar dynamic fixation on intervertebral disc stress of adjacent segment
- VernacularTitle:腰椎弹性内固定对邻近椎间盘应力影响的比较分析
- Author:
Wei FENG
;
Anmin JIN
;
Guofang FANG
- Publication Type:Journal Article
- Keywords:
dynamic fixation;
intervertebral disc;
finite element analysis;
biomechanics
- From:
Orthopedic Journal of China
2006;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
[Objective]To analyze the change of intervertebral disc Von Mises stress on the adjacent segment after "U" shape dynamic fixation for lumbar with finite element method. [Method]The three-dimensional finite element models of the lumbar dynamic fixation and rigid fixation were established by using Mimics11.11 and Abaqus6.51 softwares.Loads used in this study were axial compressive,flexion,extension,lateral bending,and rotation forces.The intervertebral disc Von Mises stress of the adjacent segment was analyzed and compared.[Result]In the same shearing load of 500 N,the intervertebral disc Von Mises stress of the adjacent segment in the dynamic fixation model was lower than rigid fixation model under axial compressive,flexion,extension,lateral bending,and rotation forces,especially at lateral of the intervertebral disc,and there were significant difference between dynamic fixation group and rigid fixation group(P
