Effects of Cervical Fusion Surgery by Different Methods on Stability in Upper Cervical Spine with Jefferson Fracture
10.16156/j.1004-7220.2021.02.10
- VernacularTitle:不同方式颈椎融合手术对上颈椎Jefferson骨折稳定效果的影响
- Author:
Houhai BI
1
;
Gaiping ZHAO
1
;
Haifei XU
2
;
Ziqiang DONG
1
;
Jiajing YANG
1
;
Hongjie WANG
3
Author Information
1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology
2. Department of Radiation Oncology, Fudan University Shanghai Cancer Center
3. Department of Orthopedics, Shanghai General Hospital
- Publication Type:Journal Article
- Keywords:
upper cervical spine;
Jefferson fracture;
atlantoaxial fusion;
occipitocervical fusion
- From:
Journal of Medical Biomechanics
2021;36(2):E231-E237
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish the finite element model of upper cervical vertebrae C0-3 with Jefferson fracture, and to analyze the influence of posterior atlantoaxial fusion (PSF) and occipitocervical fusion (OCF) on biomechanical properties of the vertebral body and mechanical conduction of the screw-rod system. Methods Based on CT images, the C0-3 segment Jefferson fracture model of human upper cervical spine was established. PSF, OCF1 and OCF2 internal fixation were performed according to surgical plan in clinic, and 50 N concentrated force and 1.5 N·m torque were applied to bottom of the occipital bone. The stress distribution and range of motion (ROM) of the cervical vertebral body, the maximum stress of the screw-rod system and the stress distribution of the intervertebral disc for C0-3 segment during flexion, extension, bending and rotation of the upper cervical spine were studied. Results Compared with PSF, the ROM of OCF1 and OCF2 vertebral bodies increased, and the stress of the nail rod decreased. OCF had a better fixation effect. Conclusions PSF, OCF1 and OCF2 fixation method can reduce the upper cervical ROM and restore stability of the upper cervical spine, which make stress distributions of the vertebral body and intervertebral disc tend to be at normal level. The research result can provide a theoretical basis for clinical surgery plan.
