Finite element analysis on inferior cervical spine biomechanics after semi-constrained cervical intervertebral disc arthroplasty and anterior cervical discectomy and fusion
10.3871/j.1004-7220.2016.03.247
- VernacularTitle:半限制型人工颈椎间盘置换与植骨融合术后下颈椎生物力学的有限元分析
- Author:
Lei-lei BAI
1
;
Gai-ping ZHAO
1
;
Cheng-xi WANG
1
;
Nan-xin CHEN
1
;
Yan-mei SONG
1
;
Er-yun CHEN
2
;
Qing-hua ZHAO
3
Author Information
1. School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology
2. Shanghai Key Laboratory of Multiphase Flow And Heat Transfer Of Power Engineering, School of Energy and Power, University of Shanghai for Science and Technology
3. Department of orthopedics, Shanghai First People’s Hospital,
- Publication Type:Journal Article
- Keywords:
Artificial disc replacement;
Cervical spine;
Range of motion (ROM);
Biomechanical properties;
Finite element analysis
- From:
Journal of Medical Biomechanics
2016;31(3):E247-E253
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study biomechanical properties such as range of motion (ROM), intervertebral disc stress, ligament tension of inferior cervical spinal segment after the treatment of Discover, Prodisc-C artificial intervertebral disc replacement, and anterior cervical discectomy and fusion (ACDF), as well as mechanical property changes of the prosthesis after implantation. Methods Three kinds of operation plan on C5-6 cervical disc degeneration were established: Discover model, Prodisc-C model and ACDF model, as well as C4-7 segment original model of cervical vertebra. Biomechanical property changes after operation in cervical spine C4-7 segment in sagittal, coronal and transverse section were analyzed. Results ROM changes of cervical segment C5-C6 were as following: in Discover model it increased by 12.7%-73.1%, Prodisc-C model increased by 74%-98%, ACDF decreased by 55.8%-71.8%. The stress of C4-5 intervertebral disc after Discover artificial disc replacement showed no obvious increase, while the stress of C6-7 intervertebral disc decreased by 33.2%-54.2% under flexion, extension and axial rotation conditions. The amplification of ligament tension in Discover model decreased by 30%-40% as compared to that in Prodisc-C model. The maximum stress of Discover model (36.72 MPa) appeared under flexion condition, which was smaller than that in Prodisc-C model. Conclusions Artificial disc replacement can help to keep movement performance for segment after surgery. As a newly developed artificial intervertebral disc prosthesis, Discover makes some progress in the aspect of decreasing ligament stress and maintaining spinal stability. The research findings will provide theoretical basis for the clinical study on ACDF and artificial cervical intervertebral disc replacement surgeries.
