Finite element analysis of stress of the adjacent vertebral end plate of T12 vertebral body in different compression states

doi:10.3969/j.issn.2095-4344.2016.22.010

Abstract

Abstract:

BACKGROUND: Vertebral compression fractures are the most common vertebral fractures in the elderly patients with osteoporosis, and the correlation between the compression of anterior border of vertebral body and adjacent vertebral refractures is not clear.

OBJECTIVE: To establish a model of different compression of T₁₂ vertebral body with finite element method, and analyze the relationship between the compression of T₁₂ vertebral body and the stress of adjacent vertebral plate.

METHODS: Based on thoracolumbar CT data of normal adult volunteers, MIMICS/3-matic was imported. Through image segmentation, repair and three-dimensional mesh of access to thoracic and lumbar T₁₁-L₁data, grid assigned material properties was imported to ABAQUS so as to establish ligament, joint and other small features and obtain realistic three-dimensional finite element model. The six degrees of freedom, including anteflexion, posterior extension, left and right flexion, left and right rotation, were loaded, to verify the validity of the normal model. With the frontier of vertebral body compression to 90%, 80%, 70%…10% of the nine states, MISES stresses of the T₁₁ and L₁segment intervertebral disc endplate were extracted; the relationship curve of compression state and endplate stress was obtained.

RESULTS AND CONCLUSION: (1) The model was highly realistic and could reflect the actual stress state. (2) The stress value of T₁₁ vertebral body and L₁ vertebral body was positively correlated with the compression of T₁₂ vertebral body. Increased stress may lead to an increased likelihood of end plate fractures, which increases the risk of fractures in the adjacent vertebral bodies.
中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Thoracic Vertebrae, Lumbar Vertebrae, Stress, Mechanical, Finite Element Analysis, Tissue Engineering

CLC Number:

R318

Feng Jie-rong, Yin Hai-dong, Chen Wei, Huang Ming-guang. Finite element analysis of stress of the adjacent vertebral end plate of T₁₂ vertebral body in different compression states[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(22): 3263-3271.

Figures/Tables 4

References

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Finite element analysis of stress of the adjacent vertebral end plate of T₁₂ vertebral body in different compression states

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