Finite Element Analysis of Lumbar Interbody Fusion with Stent-Bone Granule-Absorbable Bone Cement
10.16156/j.1004-7220.2021.02.03
- VernacularTitle:支架-骨粒-可吸收骨水泥式腰椎间融合术的有限元分析
- Author:
Haohan HUANG
1
;
Kai ZHANG
1
;
Xiaofei CHENG
1
;
Jie ZHAO
1
;
Changqing ZHAO
1
Author Information
1. Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopeadics, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine
- Publication Type:Journal Article
- Keywords:
lumbar interbody fusion;
NiTi shape memory alloy;
intervertebral cage;
absorbable bone cement;
finite element analysis
- From:
Journal of Medical Biomechanics
2021;36(2):E184-E188
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the biomechanical properties of lumbar interbody fusion with NiTi memory alloy stent-autogenous bone granule-absorbable bone cement. Methods The normal L3-5 segment finite element model (M0), L4-5 intervertebral fusion model with box fusion cage (M1), L4-5 intervertebral fusion model with NiTi memory alloy stent (M2) and L4-5 interbody fusion model with bone granule-absorbable bone cement for casting bone graft (M3) were constructed, respectively. The models were applied with mechanical loading to analyze the mechanical stability and the peak stress of L4 interior endplate. Results The range of motion (ROM) of L4-5 segment in M1 and M2 models was significantly lower than that of M0 model under flexion, extension, lateral flexion and axial rotation. In M3 model, the stability of the surgical segment was further improved and the peak stress of L4 interior endplate was much smaller than that of M1 and M2 models. Conclusions NiTi memory alloy stent and traditional box fusion cage have biomechanical equivalence when used alone in lumbar interbody fusion, and application of bone granule-absorbable bone cement for casting bone graft can further improve the stability and reduce the stress of endplate.
