Effect of the Size of Artificial Vertebral Body on the Mechanical Properties of Cervical Spine

doi:10.12068/j.issn.1005-3026.2023.08.010

Abstract

Abstract: Based on the finite element method， the effects of the size of artificial vertebral body (AVB) on the biomechanical properties of the reconstructed structure of vertebral body replacement and fusion (VBRF) was studied. Firstly， an Abaqus plug-in was developed， which could parametrically establish the three-dimensional model of AVB， and cooperate with the finite element model of the cervical spine to establish the finite element model of VBRF. Secondly， the finite element analysis was given to various VBRF models (different sizes of AVB). Finally， P_ease value， an important index closely related to implant and vertebral fusion， was introduced and compared. The results showed that there is no significant difference in the P_ease value under the condition of the same size of AVB and different wall thickness， but the size of AVB has a significant effect on the P_ease value. The P_ease value is relatively higher when the outer radius of AVB is in the range of 4~6mm， which is more conducive to the fusion of implants and vertebrae.

Key words: vertebral body replacement and fusion; artificial vertebral body; stress shielding; finite element analysis; Abaqus plug-in

CLC Number:

Q66
R318.01

ZHANG Dong-xiang， ZHANG Chi， FAN Wei， GUO Li-xin. Effect of the Size of Artificial Vertebral Body on the Mechanical Properties of Cervical Spine[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1136-1143.

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