Establishment of artificial lumbar intervertebral disc three-dimensional finite element and its stress analysis
- VernacularTitle:人工腰椎间盘三维有限元模型的建立及其应力分析
- Author:
Yichun XU
;
Shangli LIU
;
Meichao ZHANG
- Publication Type:Journal Article
- Keywords:
Lumbar vertebrae;
Intervertebral disk;
Biomechanics;
Models, biological
- From:
Chinese Journal of Orthopaedics
2001;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study artificial lumbar intervertebral disc three-dimensional finite element model and its stress state. Methods The three-dimensional finite element models of artificial lumbar intervertebral disc were established by finite element software MSC. MARK. While L4-5 motion segment from young healthy cadaver was created to give the models biomaterial characters. The vertebral disc of L4-5 was replaced by artificial lumbar intervertebral disc to make a model of an artificial disc replacement. Results After three-dimensional finite element models with biomaterial characters of artificial lumbar intervertebral disc and L4-5 motion segment had been created, the stress distribution of artificial lumbar intervertebral disc showed some characteristics as follows:1)The stress exerted in the center of polyethylene slide core and end plates is biggest in all motion states, the next exists at the deviated site while the polyethylene slide core set in motion. 2)The upper surface of polyethylene slide core and end plates bear 2-3 times stress as much as that of the lower surface. 3)The biggest stress exists in the center of polyethylene slide core and end plates during compression in all motion states. Conclusion Establishment of three-dimensional finite element models of artificial lumbar intervertebral disc and analysis of its stress are feasible. The results are reliable.
