Analysis of interfacial fracture in dental restorations

Kotousov, Andrei, Kahler, Bill and Swain, Michael (2011) Analysis of interfacial fracture in dental restorations. Dental Materials, 27 11: 1094-1101. doi:10.1016/j.dental.2011.06.009


Author Kotousov, Andrei
Kahler, Bill
Swain, Michael
Title Analysis of interfacial fracture in dental restorations
Journal name Dental Materials   Check publisher's open access policy
ISSN 0109-5641
1879-0097
Publication date 2011-11-01
Sub-type Article (original research)
DOI 10.1016/j.dental.2011.06.009
Volume 27
Issue 11
Start page 1094
End page 1101
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Formatted abstract
Objectives
To provide a brief summary of the background theory of interfacial fracture mechanics and develop an analytical framework that identifies the critical factors for the analysis of the initiation and propagation of adhesion failure in composite restorations.

Methods
A conceptual framework utilizing interfacial fracture mechanics and Toya's solution for a partially delaminated circular inclusion in an elastic matrix, which can be applied (with caution) to approximate polymer curing induced cracking about composite resins for class 1 cavity restorations.

Results
The findings indicate that: (1) most traditional shear tests are not appropriate for the analysis of the interfacial failure initiation; (2) material properties of the restorative and tooth material have a strong influence on the energy realize rate; (3) there is a strong size effect; and (4) interfacial failure once initiated is characterized by unstable propagation along the interface almost completely encircling the composite.

Significance
The work is important for the analysis of the reliability of composite class I restorations and provides an adequate interpretation of recent adhesion debonding experimental results utilizing tubular geometry of specimens. The approach clearly identifies the critical parameters including; curing strain, material modulii, size and interfacial strain energy release rate for reliable development of advanced restorative materials.
Keyword Composite resin
Interfacial fracture mechanics
Effect of material properties
Scale effect
Restorative materials
Fracture energy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Dentistry Publications
 
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