Biomechanics changes between needle withdrawal and fixation point injection bone cement vertebral plasty using finite element method
10.3969/j.issn.1673-8225.2009.48.005
- VernacularTitle:应用有限元法对比分析单侧入路退针法与固定点注射骨水泥椎体成形的生物力学变化
- Author:
Quanli LONG
;
Shijun MI
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2009;13(48):9429-9432
- CountryChina
- Language:Chinese
-
Abstract:
The primary imagine is from a seventy-old man and his L_1 is osteoporosisand painful. The patient is given operation in the injured vertebrae by onelateral, the needing point is in the left central of lateral mass of vertebrae, introversion angle is 24.5°, using withdraw way. First puncture the needle to the front one third, and inject 3 mL bone cement in, and withdraw the needle to the middle of the vertebrae, staying 3 minutes, and then inject 2 mL bone cement, and then withdraw the needle to the hind 1/3 of the body, injecting 1 mL in it. Contrasting with the way inject the all 6 mL bone cement one time in the front 1/3, which is the tradition way (simulate) and get L_(1-2) fault image, getting a validated finite element mordel, exerting the load of 500, 1 000, 1 500, 2 000, 2 500 N on the supine surface of the vertebra respectively and evaluate the stress distribution of the vertebro bodies. With the increasing load, the deformity and the strain increase with it. The vertebral bodies show the property of elasticcity, nearly linear minor deformity is. The way using withdrawal way injecting bone cement has more stress distribution and deformity than the way by tradition. The way using withdrawal way injecting bone cement has better stress distribution than the way by tradition.
