+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Contraction behaviors of dental composite restorations--finite element investigation with DIC validation

Contraction behaviors of dental composite restorations--finite element investigation with DIC validation

Journal of the Mechanical Behavior of Biomedical Materials 4(8): 2138-2149

The objective of this study was to examine the effects of cavity configuration on the polymerization shrinkage and stress of light-cured composite restorations by combining local strain measurement and a finite element analysis (FEA). Dental mesio-occluso-distal cavities of various widths and depths (each for 2 vs. 4 mm), representing different configuration factors, were prepared on extracted molars. The displacements of the bonded tooth cusps and cavity floors, caused by polymerization shrinkage of composite restorations, were assessed utilizing a digital-image-correlation (DIC) technique. The cervical marginal microleakage was investigated by examining the resin replicas of these restorations under SEM. The local material properties of the polymerized composite along the curing depth were defined by the nanoindentation test and applied in the subsequent FEA. In the FEA, four models were generated to correspond with the experimental restorations. In the DIC measurement results, the 4(w)×4(D) mm cavity presented the greatest values of inward displacements at the cusp and floor. The cavity depth, rather than the cavity width, was found to significantly correlate to the floor deformation, the location of shrinkage centers, and also the cervical microleakage ratio. The FEA simulation results showed that the 2(w)×4(D) mm cavity presented the maximal von Mises and principal stress located respectively on the cervical margins and cavity floor. Additional safety factor analysis showed a high risk of bond failure over the cavity floor in the 4-mm deep cavity. With the experimental validation, the simulation revealed that the cavity depth was significant to the formation of contraction stress and the incidence of interfacial debonding.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 052324712

Download citation: RISBibTeXText

PMID: 22098914

DOI: 10.1016/j.jmbbm.2011.07.014

Related references

The influence of cavity shape on the stresses in composite dental restorations: a finite element study. Computer Methods in Biomechanics and Biomedical Engineering 5(5): 343-349, 2003

Finite element stress analysis of three filling techniques for class V light-cured composite restorations. Journal of Dental Research 75(7): 1477-1483, 1996

The influence of the restoration-tooth interface in light cured composite restorations: a finite element analysis. Biomaterials 22(23): 3097-3103, 2001

Effect of adhesive layer properties on stress distribution in composite restorations--a 3D finite element analysis. Dental Materials 18(4): 295-303, 2002

An adaptive finite-element approach for the analysis of dental restorations. Journal of Biomedical Engineering 15(5): 401-408, 1993

A three-dimensional finite element model of the polymerization process in dental restorations. Biomaterials 24(8): 1427-1435, April, 2003

Shrinkage behaviors of dental composite restorations-The experimental-numerical hybrid analysis. Dental Materials 32(12): E362-E373, 2016

Experimental validation of a finite element model of a composite tibia. Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine 221(3): 315-324, 2007

Finite element analysis of the residual thermal stresses on functionally gradated dental restorations. Journal of the Mechanical Behavior of Biomedical Materials 50: 123-130, 2016

3D finite element analysis on esthetic indirect dental restorations under thermal and mechanical loading. Medical & Biological Engineering & Computing 48(11): 1107-1113, 2011

Homogenized finite element analysis on effective elastoplastic mechanical behaviors of composite with imperfect interfaces. International Journal of Molecular Sciences 15(12): 23389-23407, 2015

Experimental validation of finite element model for proximal composite femur using optical measurements. Journal of the Mechanical Behavior of Biomedical Materials 21: 86-94, 2013

Validation of finite element analysis in dental ceramics research. Journal of Prosthetic Dentistry 86(6): 650-654, 2001

Effect of geometric parameters on finite element analysis of bone loading caused by nonpassively fitting implant-supported dental restorations. Quintessence International 42(6): 471-478, 2011

Experimental validation of finite element models of intact and implanted composite hemipelvises using digital image correlation. Journal of Biomechanical Engineering 134(8): 081003-081003, 2013