Biomechanical analysis of pedicle screw pullout strength
RJ Bianco, PJ Arnoux, JM Mac-Thiong… - Computer methods in …, 2013 - Taylor & Francis
Computer methods in biomechanics and biomedical engineering, 2013•Taylor & Francis
Methods A detailed finite element model (FEM) of a L3 vertebra was created from CT-scan
images. The vertebra was modelled by taking into account the separation of the trabecular
core and the cortical external layer with realistic regional thickness. It was meshed with
tetrahedral elements of 0.5 mm characteristic length. The mesh was refined, and a
convergence test was done. The model integrates an elasto-plastic material law (Johnson–
Cook) with bone failure represented by the element removal (cf. Table 1). Bone was …
images. The vertebra was modelled by taking into account the separation of the trabecular
core and the cortical external layer with realistic regional thickness. It was meshed with
tetrahedral elements of 0.5 mm characteristic length. The mesh was refined, and a
convergence test was done. The model integrates an elasto-plastic material law (Johnson–
Cook) with bone failure represented by the element removal (cf. Table 1). Bone was …
Methods
A detailed finite element model (FEM) of a L3 vertebra was created from CT-scan images. The vertebra was modelled by taking into account the separation of the trabecular core and the cortical external layer with realistic regional thickness. It was meshed with tetrahedral elements of 0.5 mm characteristic length. The mesh was refined, and a convergence test was done. The model integrates an elasto-plastic material law (Johnson–Cook) with bone failure represented by the element removal (cf. Table 1). Bone was considered as a homogeneous isotropic material.
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