Development of a 3-y-old Pediatric Cervical Spine Finite Element Model

2018 6th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

材料科学;机械制造;土木建筑工程

Li, Na^1 ; Wei, Wei^2 ; Wu, Siwen^3 ; Du, Xian Ping^2 ; Liu, Yin^1 ; Rong, Pengfei^1

Xiangya 3rd Hospital, Central South University, 138th Tongzipo Rd, Changsha

410013, China^1

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, 1st Lushan South Rd, Changsha

410082, China^2

Xiangya 2rd Hospital, Central South University, 139th Renmin Rd, Changsha

410013, China^3

关键词: Complicated structures;    Cortical and cancellous bone;    Displacement curve;    Elastic-plastic Material;    High-resolution computed tomography;    Intervertebral discs;    Quasi-static loading;    Visco-elastic material;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/542/1/012035/pdf
DOI  :  10.1088/1757-899X/542/1/012035

来源: IOP

【 摘 要 】

A 3-year-old pediatric cervical spine finite element (FE) model with detailed anatomical and material properties was developed and validated against cadaver tests under both quasi-static loadings. First, bone geometry was reconstructed based on high-resolution computed tomography (CT) scans, and elastic-plastic material was defined to simulate the cortical and cancellous bones. To simulate various ligament tears during dynamic tensile, ligament failure was defined using force versus displacement curves, which had a sigmoidal shape governed by three control points. To better represent the complicated structure of the disc, nucleus pulposus, annulus fibrosus substrate and four pairs of reinforced fiber lamina, intervertebral discs were defined using composite materials combined with viscoelastic material, hill foam material and four pairs of reinforced fiber lamina, respectively. This FE model could be utilized in prediction of cervical spine fracture, ligament and disc tear underlying pediatric cervical injuries.