Experiments study on mechanical behavior of porcine lumbar intervertebral disc after nucleotomy under compression.
10.7507/1001-5515.201803053
- Author:
Songfeng ZHU
1
,
2
;
Xiuping YANG
1
,
3
;
Yichao LUAN
4
;
Qing LIU
4
;
Chunqiu ZHANG
5
Author Information
1. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin University of Technology, Tianjin 300384, P.R.China
2. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, P.R.China.
3. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, P.R.China.yhp420@sina.com.
4. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin University of Technology, Tianjin 300384, P.R.China.
5. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, Tianjin University of Technology, Tianjin 300384, P.R.China.13012251281@126.com.
- Publication Type:Journal Article
- Keywords:
constitutive model;
creep;
lumbar intervertebral disc;
nucleotomy
- MeSH:
Animals;
Biomechanical Phenomena;
Intervertebral Disc;
physiology;
surgery;
Lumbar Vertebrae;
Stress, Mechanical;
Swine;
Weight-Bearing
- From:
Journal of Biomedical Engineering
2019;36(4):590-595
- CountryChina
- Language:Chinese
-
Abstract:
In order to study the mechanical behavior of degeneration and nucleotomy of lumbar intervertebral disc, compression experiments with porcine lumbar intervertebral discs were carried out. The lumbar intervertebral discs with trypsin-treated and nucleus nucleotomy served as the experimental group and the normal discs as the control group. Considering the effects of load magnitude and loading rate, the relationship between stress and strain, instantaneous elastic modulus and creep property of intervertebral disc were obtained. The creep constitutive model was established. The results show that the strain and creep strain of the experimental group increase significantly with the increase of compression load and loading rate, whereas the instantaneous elastic modulus decreases obviously, compared with the control group. It indicates that the effect of load magnitude and loading rate on load-bearing capacity of intervertebral disc after nucleotomy is larger obviously than that of normal disc. The creep behavior of the experimental group can be still predicted by the Kelvin three-parameter solid model. The results will provide theoretical foundation for clinical treatment and postoperative rehabilitation of intervertebral disc disease.
