Title
Anisotropic finite element modeling for patient-specific mandible
Abstract
This paper presents an ad hoc modular software tool to quasi-automatically generate patient-specific three-dimensional (3D) finite element (FE) model of the human mandible. The main task is taking into account the complex geometry of the individual mandible, as well as the inherent highly anisotropic material law. At first, by computed tomography data (CT), the individual geometry of the complete range of mandible was well reproduced, also the separation between cortical and cancellous bone. Then, taking advantage of the inherent shape nature as 'curve' long bone, the algorithm employed a pair of B-spline curves running along the entire upper and lower mandible borders as auxiliary baselines, whose directions are also compatible with that of the trajectory of maximum material stiffness throughout the cortical bone of the mandible. And under the guidance of this pair of auxiliary baselines, a sequence of B-spline surfaces were interpolated adaptively as curve cross-sections to cut the original geometry. Following, based on the produced curve contours and the corresponding curve cross-section surfaces, quite well structured FE volume meshes were constructed, as well as the inherent trajectory vector fields of the anisotropic material (orthotropic for cortical bone and transversely isotropic for cancellous bone). Finally, a sensitivity analysis comprising various 3D FE simulations was carried out to reveal the relevance of elastic anisotropy for the load carrying behavior of the mandible.
Year
DOI
Venue
2007
10.1016/j.cmpb.2007.09.009
Computer Methods and Programs in Biomedicine
Keywords
Field
DocType
sensitivity analysis,cross section,computed tomography,finite element method,vector field,anisotropic material,mesh generation,three dimensional,transversely isotropic,finite element,finite element model
Cortical bone,Anisotropy,Orthotropic material,Computer science,Vector field,Finite element method,Complex geometry,Cancellous bone,Geometry,Transverse isotropy
Journal
Volume
Issue
ISSN
88
3
0169-2607
Citations 
PageRank 
References 
5
0.59
12
Authors
3
Name
Order
Citations
PageRank
Shenghui Liao17014.44
Ruofeng Tong246649.69
Jinxiang Dong331165.36