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Journal of Nanomaterials
Volume 2014, Article ID 671205, 6 pages
http://dx.doi.org/10.1155/2014/671205
Research Article

Evaluation of Degradation in Nanofilled Adhesive Resins Using Quantitative Light-Induced Fluorescence

1Department of Conservative Dentistry, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
2Department of Prosthodontic Dentistry, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
3Department of Preventive Dentistry, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
4Department of Dental Materials, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea

Received 17 July 2014; Accepted 3 September 2014; Published 22 September 2014

Academic Editor: Seunghan Oh

Copyright © 2014 Tae-Young Park et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this study was to evaluate degradation in commercial dental nanofilled adhesive resins using quantitative light-induced fluorescence (QLF). Three adhesives were selected: D/E resin (DR), Single Bond Plus (SB), and G-Bond (GB). The adhesives were mixed with porphyrin for the QLF analysis. Specimens were prepared by dispensing blended adhesives into a flexible mold and polymerizing. Then, the QLF analysis of the specimens was done and the porphyrin values (Simple Plaque Score and ) were measured. After thermocycling of the specimens (5000 cycles, 5 to 55°C) for the degradation, the specimens were assayed by QLF again. The porphyrin values were analyzed using paired t-test at a 95% confidence level. A significant reduction in SPS was observed in all groups after thermocycling. The significantly decreased after thermocycling except area 30 of SB group. Overall, porphyrin values decreased after thermocycling which indicates that the degradation of the adhesive resins may be measured by the change of porphyrin value. The QLF method could be used to evaluate the degradation of adhesive resin.