[Three-dimensional finite element model of thoracolumbar spine with osteoporotic vertebral compression fracture].
Zhonghua Yi Xue Za Zhi
; 90(41): 2943-6, 2010 Nov 09.
Article
em Zh
| MEDLINE
| ID: mdl-21211403
ABSTRACT
OBJECTIVE:
To build a three-dimensional finite element model of thoracolumbar spine with osteoporotic vertebral compression fracture (OVCF) and analyze its biomechanical change.METHODS:
The T10-L2 segment data were obtained from computed tomography (CT) scans of an elderly female with a single T12 OVCF. A three-dimensional finite element model of thoracolumbar spine was constructed with the MIMICS and ABAQUS software. The model was composed of bony vertebrae, articulating facets, intervertebral disc and associated ligaments. The basic stress analysis of T10-L2 motion segment was made for different material properties of bone, ligaments and facet joints contacting frictional property. The stress on the annulus fiber, nucleus pulposus, endplate and facet joints under axial pressure (0.3 MPa, 1.0 MPa, 4.0 MPa) were analyzed.RESULTS:
A three-dimensional finite element model of human T12-L2 motion segment had 617468 elements. And the stress was higher in vertebral body than posterior structure. The distribution of pressure stresses in intervertebral disc was asymmetrical. The stress increased with a rising axial pressure.CONCLUSION:
3D finite element model of thoracolumbar OVCF and adjacent segments are successfully established. The results of stress analysis are both feasible and reliable.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Osteoporose
/
Fraturas da Coluna Vertebral
/
Análise de Elementos Finitos
/
Fraturas por Compressão
Tipo de estudo:
Diagnostic_studies
Limite:
Aged
/
Female
/
Humans
Idioma:
Zh
Ano de publicação:
2010
Tipo de documento:
Article