Finite element analysis on lower cervical spine by anterior cervical corpectomy and fusion sugery
10.16156/j.1004-7220.2017.03.04
- VernacularTitle:前路椎体次全切除减压融合术治疗下颈椎的有限元分析
- Author:
Gai-ping ZHAO
1
;
Nan-xin CHEN
1
;
Yan-mei SONG
1
;
Er-yun CHEN
2
;
Tong MA
3
;
Yi-hui TU
3
Author Information
1. School of Medical Instrument and Food Engineering University of Shanghai for Science and Technology
2. School of Energy and Power, University of Shanghai for Science and Technology
3. Department of Orthopedic Surgery, Yangpu District Central Hospital
- Publication Type:Journal Article
- Keywords:
Cervical corpectomy and fusion (ACCF);
Titanium mesh and bone graft;
Plate and screw fixation;
Lower cervical spine;
Finite element analysis
- From:
Journal of Medical Biomechanics
2017;32(3):E227-E234
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish the three-dimensional finite element model of human lower cervical spine C3-7 motion segments after anterior cervical corpectomy and fusion (ACCF) surgery with titanium mesh and bone graft, and to analyze the stability of cervical spine and stress distribution of internal fixation devices after ACCF surgery. Methods The finite element model of cervical spine C3-7 segments after ACCF of C5 segment with titanium mesh, bone graft, plate and screw fixation was established，and C3-7 segment intact model of cervical vertebra was also constructed. The torque moment of 0.5, 1.0, 1.5, 2.0 N﹒m was applied to the ACCF surgery model. The ROM, maximum stress in facet joint and stress distributions on internal fixation devices under flexion, extension, lateral bending and torsion movement were analyzed. Results ROM of reconstructed C5 segment increased with the torque moment increasing after ACCF surgery. In the case of 1.0 N﹒m torque moment and 50 N preload, the ROM of reconstructed C5, C3-4, C6-7 and C3-7 segment was reduced by 81%, 62%, 58% and 80% compared with the intact model. The maximum stress in facet joint of reconstructed C5 segment reduced and the stress in adjacent segments significantly increased. The stress of titanium mesh was mainly distributed on the compression side of movement, and high stress was located in the roots of screws. Conclusions ACCF surgery can promote the stability of cervical spine, decrease the stress in facet joint of operation segment, and has better treatment effect on easing compression from spinal cord caused by cervical spondylotic myelopathy. The research results will provide some theoretical basis for clinical application of ACCF.
