Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (35): 5632-5637.doi: 10.12307/2021.292

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Establishment and validation of C0-T1 finite element model of cervical vertebrae in adult rhesus monkeys

Wang Xing1, 2, Xu Xuebin2, Zhang Shaojie1, 2, Zheng Bingwu3, Yang Xi2, Wang Chaoqun4, Li Ping5, Ma Yuan6, Li Kun2, Chen Jie2, Li Xiaohe2,   Shi Jun7, Li Zhijun1, 2   

  1. 1School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 101000, China; 2Department of Anatomy, 6Center for Digital Medicine, 7Department of Physiology, School of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot 010110, Inner Mongolia Autonomous Region, China
  • Received:2020-07-24 Revised:2020-08-18 Accepted:2020-10-16 Online:2021-12-18 Published:2021-08-03
  • Contact: Li Zhijun, Professor, Doctoral supervisor, School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 101000, China; Department of Anatomy, School of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot 010110, Inner Mongolia Autonomous Region, China
  • About author:Wang Xing, MD candidate, Lecturer, School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 101000, China; Department of Anatomy, School of Basic Medical Sciences, Inner Mongolia Medical University, Hohhot 010110, Inner Mongolia Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81860382 (to WX), 81860383, 81560348 (both to LZJ), and 81660358 (to ZSJ); Inner Mongolia Natural Science Foundation, No. 2020MS03061 (to WX), 2019MS08017 (to ZSJ), and 2019MS08139 (to CJ); Science and Technology Development Projects of Inner Mongolia Autonomous Region, No. 2019GG158 (to WX) and 2019GG111 (to LP); Science and Technology Million Project of Inner Mongolia Medical University, No. YKD2017KJBW009 (to WX) and 2015YKDKJBW03 (to ZSJ); Youth Innovation Fund of Inner Mongolia Medical University, No. TKD2018QNCX071 (to WCQ)

Abstract: BACKGROUND: Both rhesus monkeys and humans belong to primates, and their cervical vertebra structure, physiological function and living conditions are very similar to those of human beings. However, there are few studies on the finite element analysis of the whole cervical vertebra of rhesus monkeys.
OBJECTIVE: To establish the C0-T1 finite element model of cervical vertebrae of adult rhesus monkeys and to make a comparative study between the finite element models of cervical vertebrae of adult rhesus monkeys and human cervical vertebrae in order to find out the difference. 
METHODS: A 7-year-old adult male rhesus monkey was selected and scanned by multi-slice spiral CT in the Imaging Department of the affiliated Hospital of Inner Mongolia Medical University in December 2019. The original CT data of cervical vertebrae were introduced into Mimics21.0 to establish a preliminary three-dimensional model, and the geometric structure of the model was optimized by Cero to get the simulation three-dimensional model of cervical vertebrae. The assembly model was imported into Hypermesh for tetrahedral gridding to divide the tissue grids of various segments, intervertebral discs and ligaments of cervical vertebrae. Then the finite element model of cervical vertebra was constructed by Abaqus&ANSYS, and the validity was verified by referring to the relevant finite element model literature. 
RESULTS AND CONCLUSION: The three-dimensional finite element model of cervical vertebra of rhesus monkey (including C0-T1 and six intervertebral discs and related ligaments) was successfully established, with a total of 536 215 elements and 461 915 nodes. The overall simulation of the model was high, and the fine structure was restored with high precision, resulting in a high biological simulation performance. Comparing the range of motion of this model with that of human cervical vertebra model, we found that the flexion and extension of this model were smaller than those of normal adults (P < 0.05), and left and right lateral bending of C2-3, C3-4 and C6-7 segments was smaller than the range of standard deviation as reported (P < 0.05). However, axial rotation showed no significant difference as compared with the value reported previously (P > 0.05). To conclude, there is a great difference in the exercise efficiency between the finite element models of rhesus monkey cervical vertebra and human cervical vertebra, which can provide a theoretical basis for the study of rhesus monkey cervical vertebra modeling.

Key words: adult rhesus monkey, whole cervical vertebra, finite element analysis, digital model, human

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