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Numerical fatigue 3D-FE modeling of indirect composite-restored posterior teeth
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Ausiello, Pietro, Franciosa, Pasquale, Martorelli, Massimo and Watts, David C (2011) Numerical fatigue 3D-FE modeling of indirect composite-restored posterior teeth. Dental Materials, 27 (5). pp. 423-430. doi:10.1016/j.dental.2010.12.001 ISSN 0109-5641.
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Official URL: http://dx.doi.org/10.1016/j.dental.2010.12.001
Abstract
Objective
In restored teeth, stresses at the tooth–restoration interface during masticatory processes may fracture the teeth or the restoration and cracks may grow and propagate. The aim was to apply numerical methodologies to simulate the behavior of a restored tooth and to evaluate fatigue lifetimes before crack failure.
Materials and methods
Using a CAD–FEM procedure and fatigue mechanic laws, the fatigue damage of a restored molar was numerically estimated. Tessellated surfaces of enamel and dentin were extracted by applying segmentation and classification algorithms, to sets of 2D image data. A user-friendly GUI, which enables selection and visualization of 3D tessellated surfaces, was developed in a MatLab® environment. The tooth-boundary surfaces of enamel and dentin were then created by sweeping operations through cross-sections. A class II MOD cavity preparation was then added into the 3D model and tetrahedral mesh elements were generated. Fatigue simulation was performed by combining a preliminary static FEA simulation with classical fatigue mechanical laws.
Results
Regions with the shortest fatigue-life were located around the fillets of the class II MOD cavity, where the static stress was highest.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Journal or Publication Title: | Dental Materials | ||||
Publisher: | Elsevier | ||||
ISSN: | 0109-5641 | ||||
Official Date: | 2011 | ||||
Dates: |
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Volume: | 27 | ||||
Number: | 5 | ||||
Page Range: | pp. 423-430 | ||||
DOI: | 10.1016/j.dental.2010.12.001 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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