期刊
WORLD NEUROSURGERY
卷 114, 期 -, 页码 E1086-E1093出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.wneu.2018.03.150
关键词
Bilateral pedicle screw fixation; Dynamic response; Finite element model; Lumbar spine; Transforaminal lumbar interbody fusion; Whole body vibration
资金
- National Natural Science Foundation of China [51275082, 11272273]
OBJECTIVE: Few studies have evaluated the need for supplementary instrumentation after lumbar interbody fusion under the condition of whole body vibration (WBV) that is typically present in vehicles. This study aimed to determine the effect of posterior pedicle screw fixation on dynamic response of the whole lumbar spine to vertical WBV after transforaminal lumbar interbody fusion (TLIF). METHODS: A previously validated nonlinear, osteoliga-mentous finite element (FE) model of the intact L1-sacrum human lumbar spine was modified to simulate single-level (L4-L5) TLIF without and with bilateral pedicle screw fixation (BPSF). Transit dynamic analysis was performed on the 2 developed models under a sinusoidal vertical vibration load of +/- 40 N and a compressive follower preload of 400 N. The resulting dynamic response results for the 2 models in terms of stresses and deformations were recorded and compared. RESULTS: When compared with no fixation, BPSF decreased dynamic responses of the spinal levels to the vertical vibration after TLIF. At the fused level (L4-L5), vibration amplitudes of the von-Mises stresses in L4 inferior endplate and L5 superior endplate decreased after BPSF by 48.0% and 46.4%, respectively. At other disc levels (L1-L2, L2-L3, L3-L4, and L5-S1), vibration amplitudes of the disc bulge, von-Mises stress in annulus ground substance and intradiscal pressure also produced 4.2%-9.0%, 2.3%-8.9%, and 3.4%-8.8% deceases, respectively, after BPSF. CONCLUSIONS: After TLIF, application of BPSF can be helpful in the prevention of spine injury during vertical WBV.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据