Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11102
Title: The influence of shrinkage and moisture diffusion on idealized tooth structure involving debonding damage
Authors: Fan, J
Tang, CY 
Keywords: Dental composite
Displacement distribution
Finite element method
Polymerization shrinkage
Restoration-tooth structure
Stress distribution
Water sorption
Issue Date: 2005
Publisher: Acta Mechanica Solida Sinica
Source: Acta mechanica solida sinica, 2005, v. 18, no. 2, p. 110-112 How to cite?
Journal: Acta Mechanica Solida Sinica 
Abstract: This study highlights the joint effect of early polymerization shrinkage and long-term moisture diffusion on the behavior of the restoration-tooth structure. The interphase debonding between particle and polymer resin in dental composite is taken into account by introducing the damage variable. The idealized model is designed and constructed for representing the restoration-tooth structure, which consists of enamel, dentin, composite and interphase, each considered as homogenous material. The simulation is carried out using the general-purpose finite element software package, ABAQUS incorporated with a user subroutine for definition of damaged material behavior. The influence of Young's moduli of composite and interphase on stress and displacement is discussed. The compensating effect of water sorption on the polymerization shrinkage is examined with and without involving damage evolution. A comparison is made between the influence of hyper-, equi- and hypo-water sorption. Interfacial failure in the specific regions as well as cuspal movement has been predicated. The damage evolving in dental composite reduces the rigidity of composite, thus in turn reducing consequent stress and increasing consequent displacement. The development of stresses at the restoration-tooth interface can have a detrimental effect on the longevity of a restoration.
URI: http://hdl.handle.net/10397/11102
ISSN: 0894-9166
DOI: 10.1007/s10338-005-0515-2
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