Generation of 3-D finite element models of restored human teeth using micro-CT techniques.
OBJECTIVE
This article describes the development of a three-dimensional finite element model of a premolar based on a microscale computed tomographic (CT) data-acquisition technique. The development of the model is part of a project studying the optimal design and geometry of adhesive tooth-colored cusp-replacing restorations.


METHODS
The premolar was digitized with a micro CT scanner with a resolution of 13 microns. Surface contours were fitted to the various materials, after which a 3-D finite element mesh was constructed to the contours. To demonstrate the potential use of the resulting model, it was applied to a cusp-replacing resin composite restoration.


RESULTS
The stress patterns generated in the composite material were truly 3-D. Stress concentrations were found at the surface where the load was applied and in the vicinity of the dentin-composite bonding surface, where the interface had its complex geometry.


CONCLUSIONS
The described procedure is an easy method to produce a highly detailed 3-D finite element model of a premolar with an adhesive cusp-replacing restoration.
Verdonschot
N
N
Orthopedic Research Laboratory, University of Nijmegen, The Netherlands.
Fennis
W M
WM
Kuijs
R H
RH
Stolk
J
J
Kreulen
C M
CM
Creugers
N H
NH
D001641:Bicuspid / Q000000981:diagnostic imaging; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins; D003198:Computer Simulation; D003793:Dental Restoration, Permanent; D003799:Dental Stress Analysis / Q000379:methods*; D004548:Elasticity; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods*; D008422:Materials Testing; D008437:Maxilla; D003765:Models, Dental; D019279:Resin Cements; D013718:Tensile Strength; D015898:Tomography Scanners, X-Ray Computed; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods
D003188:Composite Resins; C079764:Pertac hybrid; D019279:Resin Cements; C065770:Herculite XR; C092420:Clearfil Photo Posterior; D017438:Bisphenol A-Glycidyl Methacrylate