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包含脊髓的颈椎三维有限元模型:三种损伤机制的研究

A three-dimensional finite element model of the cervical spine with spinal cord: an investigation of three injury mechanisms.

作者信息

Greaves Carolyn Y, Gadala Mohamed S, Oxland Thomas R

机构信息

Division of Orthopaedic Engineering Research, Departments of Mechanical Engineering and Orthopaedics, University of British Columbia, #566-828 West 10th Ave, Vancouver, BC, Canada.

出版信息

Ann Biomed Eng. 2008 Mar;36(3):396-405. doi: 10.1007/s10439-008-9440-0. Epub 2008 Jan 29.


DOI:10.1007/s10439-008-9440-0
PMID:18228144
Abstract

The spinal cord may be injured through various spinal column injury patterns (e.g., burst fracture, fracture dislocation); however, the relationship between column injury pattern and cord damage is not well understood. A three-dimensional finite element model of a human cervical spine and spinal cord segment was developed, verified using published experimental data, and used to investigate differences in cord strain distributions during various column injury patterns. For a transverse contusion injury, as would occur in a burst fracture, a 33% canal occlusion resulted in two peaks of strain between the indentor and opposing vertebral body and intermediate peak strain values. For a distraction injury, relevant to column distortion injuries, a 2.6 mm axial displacement to the cord resulted in more uniform strains throughout the cord and low peak strain values. For a dislocation injury, as would occur in a fracture dislocation, an anterior displacement of C5 corresponding to 30% of the sagittal dimension of the vertebral body resulted in high peak strain values adjacent to the shearing vertebrae and increased strains in the lateral columns compared to contusion. This model includes more anatomical details compared to previous studies and provides a baseline for mechanical comparisons in spinal cord injury.

摘要

脊髓可能会因各种脊柱损伤模式(如爆裂骨折、骨折脱位)而受损;然而,脊柱损伤模式与脊髓损伤之间的关系尚未得到充分理解。建立了一个人类颈椎和脊髓节段的三维有限元模型,使用已发表的实验数据进行验证,并用于研究各种脊柱损伤模式下脊髓应变分布的差异。对于横向挫伤损伤,如爆裂骨折中会发生的情况,33%的椎管闭塞导致在压头与相对椎体之间出现两个应变峰值以及中间峰值应变值。对于与脊柱扭曲损伤相关的牵张损伤,脊髓轴向位移2.6毫米会导致整个脊髓的应变更加均匀且峰值应变值较低。对于骨折脱位中会出现的脱位损伤,C5向前位移相当于椎体矢状径的30%,导致与剪切椎体相邻处出现高的峰值应变值,并且与挫伤相比,侧柱中的应变增加。与先前的研究相比,该模型包含更多的解剖细节,并为脊髓损伤的力学比较提供了一个基线。

相似文献

[1]
A three-dimensional finite element model of the cervical spine with spinal cord: an investigation of three injury mechanisms.

Ann Biomed Eng. 2008-3

[2]
Coupling between the spinal cord and cervical vertebral column under tensile loading.

J Biomech. 2012-12-27

[3]
Three-dimensional finite element model of the cervical spinal cord: preliminary results of injury mechanism analysis.

Spine (Phila Pa 1976). 2009-5-15

[4]
Burst fracture in the metastatically involved spine: development, validation, and parametric analysis of a three-dimensional poroelastic finite-element model.

Spine (Phila Pa 1976). 2003-4-1

[5]
Translational constraint influences dynamic spinal canal occlusion of the thoracic spine: an in vitro experimental study.

J Biomech. 2008

[6]
The biomechanical analysis of the traumatic cervical spinal cord injury using finite element approach.

Acta Bioeng Biomech. 2008

[7]
Maximum principal strain correlates with spinal cord tissue damage in contusion and dislocation injuries in the rat cervical spine.

J Neurotrauma. 2012-4-18

[8]
Influence prediction of injury and vibration on adjacent components of spine using finite element methods.

J Spinal Disord Tech. 2006-4

[9]
Biomechanical Behaviors in Three Types of Spinal Cord Injury Mechanisms.

J Biomech Eng. 2016-8-1

[10]
Use of the finite element method to study the mechanism of spinal cord injury without radiological abnormality in the cervical spine.

Spine (Phila Pa 1976). 2009-1-15

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[3]
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JMIR Biomed Eng. 2024-3-28

[4]
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J Eng Sci Med Diagn Ther. 2024-5-1

[5]
Finite element modeling of the human cervical spinal cord and its applications: A systematic review.

N Am Spine Soc J. 2023-7-27

[6]
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J Eng Sci Med Diagn Ther. 2018-2

[7]
Effect of Velocity and Contact Stress Area on the Dynamic Behavior of the Spinal Cord Under Different Testing Conditions.

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[8]
A Hyper-Viscoelastic Continuum-Level Finite Element Model of the Spinal Cord Assessed for Transverse Indentation and Impact Loading.

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[9]
The biomechanical effect of preexisting different types of disc herniation in cervical hyperextension injury.

J Orthop Surg Res. 2021-8-24

[10]
Correlating Tissue Mechanics and Spinal Cord Injury: Patient-Specific Finite Element Models of Unilateral Cervical Contusion Spinal Cord Injury in Non-Human Primates.

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