Nondestructive quantification of leakage at the tooth–composite interface and its correlation with material performance parameters

Abstract Current methods to determine debonding/leakage at the tooth–composite interface are qualitative or semi-quantitative. Our previous work introduced a 3D imaging technique to determine and visualize leakage and its distribution at the interface of cavity wall and composite restoration in mode...

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Bibliographic Details
Published in:Biomaterials 2009-09, Vol.30 (27), p.4457-4462
Main Authors: Sun, Jirun, Fang, Rui, Lin, Nancy, Eidelman, Naomi, Lin-Gibson, Sheng
Format: Article
Language:English
Subjects:
Advanced Basic Science
Coloring Agents
Composite Resins - chemistry
Dental Leakage - metabolism
Dental restorative material
Dentistry
Image analysis
Infrared spectrum
Interface
Materials Testing - methods
Photopolymerization
Reproducibility of Results
Strain-rate
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Summary:Abstract Current methods to determine debonding/leakage at the tooth–composite interface are qualitative or semi-quantitative. Our previous work introduced a 3D imaging technique to determine and visualize leakage and its distribution at the interface of cavity wall and composite restoration in model cavities. In this study, an automated program was developed to quantify leakage in terms of area and volume. 3D leakage distribution obtained via the image analysis program was shown to have excellent agreement with leakage visualized by dye penetration. The relationship between leakage and various material performance parameters including processability, shrinkage, stress, and shrinkage strain-rate was determined using a series of experimental composites containing different filler contents. Results indicate that the magnitude of leakage correlated well with polymerization stress, confirming the validity of the common approach utilizing polymerization stress to predict bonding durability. 3D imaging and image analysis provide insight to help understand the relations between leakage and material properties.
ISSN:0142-9612
1878-5905
DOI:10.1016/j.biomaterials.2009.05.016