A finite element model was used to compare the biomechanical properties of a novel anterior transpedicular screw artificial vertebral body system (AVBS) with a conventional anterior screw plate system (ASPS) for fixation in the lower cervical spine. A model of the intact cervical spine (C3–C7) was established. AVBS or ASPS constructs were implanted between C4 and C6. The models were loaded in three-dimensional (3D) motion. The Von Mises stress distribution in the internal fixators was evaluated, as well as the range of motion (ROM) and facet joint force. The models were generated and analyzed by mimics, geomagic studio, and ansys software. The intact model of the lower cervical spine consisted of 286,382 elements. The model was validated against previously reported cadaveric experimental data. In the ASPS model, stress was concentrated at the connection between the screw and plate and the connection between the titanium mesh and adjacent vertebral body. In the AVBS model, stress was evenly distributed. Compared to the intact cervical spine model, the ROM of the whole specimen after fixation with both constructs is decreased by approximately 3 deg. ROM of adjacent segments is increased by approximately 5 deg. Facet joint force of the ASPS and AVBS models was higher than those of the intact cervical spine model, especially in extension and lateral bending. AVBS fixation represents a novel reconstruction approach for the lower cervical spine. AVBS provides better stability and lower risk for internal fixator failure compared with traditional ASPS fixation.
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June 2017
Research-Article
A Novel Anterior Transpedicular Screw Artificial Vertebral Body System for Lower Cervical Spine Fixation: A Finite Element Study
Weidong Wu,
Weidong Wu
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China;
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China;
Wuhan Concrete Technology Company Limited,
Gaoxin Avenue 818,
Wuhan 430200, Hubei, China
e-mail: wu315129181@163.com
Gaoxin Avenue 818,
Wuhan 430200, Hubei, China
e-mail: wu315129181@163.com
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Chun Chen,
Chun Chen
Department of Orthopedics,
The First Affiliated Hospital of Wenzhou Medical University,
Wenzhou 325000, Zhejiang, China
e-mail: chenchunkk@163.com
The First Affiliated Hospital of Wenzhou Medical University,
Wenzhou 325000, Zhejiang, China
e-mail: chenchunkk@163.com
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Jinpei Ning,
Jinpei Ning
Department of Orthopedics,
Wuzhou Red Cross Hospital,
Wuzhou 543002, Guangxi, China
e-mail: njp008@sina.com
Wuzhou Red Cross Hospital,
Wuzhou 543002, Guangxi, China
e-mail: njp008@sina.com
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Peidong Sun,
Peidong Sun
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: spdwwf@126.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: spdwwf@126.com
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Jinyuan Zhang,
Jinyuan Zhang
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 553545578@qq.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 553545578@qq.com
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Changfu Wu,
Changfu Wu
Department of Orthopedic Surgery,
The Affiliated Hospital of Putian University,
Putian 351100, Fujian, China;
The Affiliated Hospital of Putian University,
Putian 351100, Fujian, China;
Department of Orthopedic Surgery,
The Affiliated Putian Hospital of Southern Medical University,
Putian 351100, Fujian, China
e-mail: wuchangfu360@163.com
The Affiliated Putian Hospital of Southern Medical University,
Putian 351100, Fujian, China
e-mail: wuchangfu360@163.com
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Zhenyu Bi,
Zhenyu Bi
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: lybimail@126.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: lybimail@126.com
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Jihong Fan,
Jihong Fan
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 793649633@qq.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 793649633@qq.com
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Xianliang Lai,
Xianliang Lai
Department of Orthopedic Surgery,
Wenzhou Hospitals of Traditional Chinese and Western Medicine,
Wenzhou 325000, Zhejiang, China
e-mail: 303476292@qq.com
Wenzhou Hospitals of Traditional Chinese and Western Medicine,
Wenzhou 325000, Zhejiang, China
e-mail: 303476292@qq.com
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Jun Ouyang
Jun Ouyang
Professor
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
No. 1023 Shatai Road,
Baiyun District,
Guangzhou 510515, China
e-mail: jouyang@126.com
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
No. 1023 Shatai Road,
Baiyun District,
Guangzhou 510515, China
e-mail: jouyang@126.com
Search for other works by this author on:
Weidong Wu
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China;
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China;
Wuhan Concrete Technology Company Limited,
Gaoxin Avenue 818,
Wuhan 430200, Hubei, China
e-mail: wu315129181@163.com
Gaoxin Avenue 818,
Wuhan 430200, Hubei, China
e-mail: wu315129181@163.com
Chun Chen
Department of Orthopedics,
The First Affiliated Hospital of Wenzhou Medical University,
Wenzhou 325000, Zhejiang, China
e-mail: chenchunkk@163.com
The First Affiliated Hospital of Wenzhou Medical University,
Wenzhou 325000, Zhejiang, China
e-mail: chenchunkk@163.com
Jinpei Ning
Department of Orthopedics,
Wuzhou Red Cross Hospital,
Wuzhou 543002, Guangxi, China
e-mail: njp008@sina.com
Wuzhou Red Cross Hospital,
Wuzhou 543002, Guangxi, China
e-mail: njp008@sina.com
Peidong Sun
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: spdwwf@126.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: spdwwf@126.com
Jinyuan Zhang
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 553545578@qq.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 553545578@qq.com
Changfu Wu
Department of Orthopedic Surgery,
The Affiliated Hospital of Putian University,
Putian 351100, Fujian, China;
The Affiliated Hospital of Putian University,
Putian 351100, Fujian, China;
Department of Orthopedic Surgery,
The Affiliated Putian Hospital of Southern Medical University,
Putian 351100, Fujian, China
e-mail: wuchangfu360@163.com
The Affiliated Putian Hospital of Southern Medical University,
Putian 351100, Fujian, China
e-mail: wuchangfu360@163.com
Zhenyu Bi
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: lybimail@126.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: lybimail@126.com
Jihong Fan
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 793649633@qq.com
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
Guangzhou 510515, China
e-mail: 793649633@qq.com
Xianliang Lai
Department of Orthopedic Surgery,
Wenzhou Hospitals of Traditional Chinese and Western Medicine,
Wenzhou 325000, Zhejiang, China
e-mail: 303476292@qq.com
Wenzhou Hospitals of Traditional Chinese and Western Medicine,
Wenzhou 325000, Zhejiang, China
e-mail: 303476292@qq.com
Jun Ouyang
Professor
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
No. 1023 Shatai Road,
Baiyun District,
Guangzhou 510515, China
e-mail: jouyang@126.com
Department of Anatomy,
Guangdong Provincial Medical Biomechanical Key Laboratory,
Academy of Orthopedics of Guangdong Province,
Southern Medical University,
No. 1023 Shatai Road,
Baiyun District,
Guangzhou 510515, China
e-mail: jouyang@126.com
1W. Wu and C. Chen contributed equally to this work.
2Corresponding author.
Manuscript received December 1, 2016; final manuscript received March 19, 2017; published online April 18, 2017. Assoc. Editor: Brian D. Stemper.
J Biomech Eng. Jun 2017, 139(6): 061003 (8 pages)
Published Online: April 18, 2017
Article history
Received:
December 1, 2016
Revised:
March 19, 2017
Citation
Wu, W., Chen, C., Ning, J., Sun, P., Zhang, J., Wu, C., Bi, Z., Fan, J., Lai, X., and Ouyang, J. (April 18, 2017). "A Novel Anterior Transpedicular Screw Artificial Vertebral Body System for Lower Cervical Spine Fixation: A Finite Element Study." ASME. J Biomech Eng. June 2017; 139(6): 061003. https://doi.org/10.1115/1.4036393
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