Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (24): 3773-3778.doi: 10.12307/2021.078

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A 4-year-old child model of occipito-atlanto-axial joints established by finite element dynamic simulation

Li Kun1, Li Zhijun1, Zhang Shaojie1, Gao Shang1, Sun Hao2, Yang Xi1, Wang Xing1, Dai Lina1    

  1. 1Department of Human Anatomy, 2Student Management Office, Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia Autonomous Region, China 
  • Received:2020-07-20 Revised:2020-07-22 Accepted:2020-10-16 Online:2021-08-28 Published:2021-03-05
  • Contact: Li Zhijun, Professor, Doctoral supervisor, Department of Human Anatomy, Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia Autonomous Region, China Zhang Shaojie, Associate professor, Master’s supervisor, Department of Human Anatomy, Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia Autonomous Region, China
  • About author:Li Kun, Master, Department of Human Anatomy, Inner Mongolia Medical University, Hohhot 010000, Inner Mongolia Autonomous Region, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81860382 (to WX); the National Natural Science Foundation of China, No. 81860383 (to LZJ); the National Natural Science Foundation of China, No. 81660358 (to ZSJ); the Talent Cultivation Project of Inner Mongolia Medical University, No. YCPY20200090, YCPY20200002 (to LK); the Laboratory Open Project of Inner Mongolia Medical University, No. 2020ZN48 (to LK); the Innovation and Entrepreneurship Project of Inner Mongolia Medical University, No. 20201032001 (to LK); the Natural Science Foundation of Inner Mongolia Autonomous Region, No. 2020MS03061 (to WX); the Natural Science Foundation of Inner Mongolia Autonomous Region, No. 2019MS08017 (to ZSJ); the Science and Technology Development Plan Project of Inner Mongolia Autonomous Region, No. 2019GG158 (to WX)

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Abstract: BACKGROUND: Children’s occipito-atlanto-axial joints have their own characteristics in morphological development and physiological characteristics, and clinical injuries are more common. The establishment of finite element model can better understand the mechanism of injury, and provide a theoretical basis for the prevention, diagnosis and treatment of craniocervical junction disease, as well as the design and development of internal fixation instruments. 
OBJECTIVE: To establish the C0-C2 three-dimensional finite element model for children and to provide experimental application basis for further biomechanical research.
METHODS: A 4-year-old normal child was selected as the experimental source of the original data. The original data were obtained by 64-slice spiral CT scanning. The three-dimensional finite element model of C0-C2 joint was simulated by Mimics, Geomagic Studio, Hypermesh, Abaqus and other software, and the motion range and mechanical characteristics of each direction were verified.
RESULTS AND CONCLUSION: The 4-year old child C0-C2 three-dimensional model containing ligaments was successfully constructed, including 444 927 grid cells and 657 617 nodes. The range of motion in all directions was good, and the range of motion in all directions of the model was located in the reference range except that C0-C1 had a large degree of motion in forward flexion and left and right rotation. The C0-C2 three-dimensional finite element model has high quasi-truth of local force and activity in all directions, and has good geometric similarity, so the model is real and effective.

Key words: finite element, biomechanics, occipito-atlanto-axial joint, mechanical load, range of motion, anatomical structure, stress, children

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