Nonlinear finite-element analysis and biomechanical evaluation of the lumbar spine

A finite-element analysis (FEA) model of an intact lumbar disc-body unit was generated. The vertebral body of the FEA model consisted of a solid tetrahedral core of trabecular bone surrounded by a cortical shell. The disc consisted of an incompressible nucleus surrounded by nonlinear annulus fibers...

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Bibliographic Details
Published in:IEEE transactions on medical imaging 2003-06, Vol.22 (6), p.742-746
Main Authors: Wong, C., Gehrchen, P.M., Darvann, T., Kiaer, T.
Format: Article
Language:English
Subjects:
Cancellous bone
Compressive Strength
Computer Simulation
Elasticity
Finite Element Analysis
Finite element methods
Humans
Imaging, Three-Dimensional - methods
Intervertebral Disc - physiology
Ligaments
Ligaments - physiology
Lumbar Vertebrae - diagnostic imaging
Lumbar Vertebrae - physiology
Material properties
Mesh generation
Models, Biological
Motion
Nonlinear Dynamics
Radiography
Solid modeling
Spine
Stability
Stress, Mechanical
Surgery
Testing
Torque
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Summary:A finite-element analysis (FEA) model of an intact lumbar disc-body unit was generated. The vertebral body of the FEA model consisted of a solid tetrahedral core of trabecular bone surrounded by a cortical shell. The disc consisted of an incompressible nucleus surrounded by nonlinear annulus fibers embedded in a solid ground substance. The purpose was to create a FEA model suitable for clinical purposes as fracture assessment, instrumentation with pedicle screws, and bone remodeling. Testing of the FEA model was performed nonlinear for a number of loading conditions, and the results were compared with experimental data from the literature. The results showed good agreement. The formulation of the FEA model can be justified for the tested loading conditions.
ISSN:0278-0062
1558-254X
DOI:10.1109/TMI.2003.814783