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    Effect of Different Cavity Disinfectants on Shear Bond Strength of Composite Resin to Dentin
    (QUINTESSENCE PUBLISHING CO INC, 2009) Ercan, Ertuğrul; Erdemir, Ali; Zorba, Yahya Orçun; Eldeniz, Ayce Ünverdi; Dallı, Mehmat; İnce, Bayram; Kalaycıoğlu, Barış
    Purpose: The aim of this study was to evaluate the effect of different cavity disinfectants on dentin bond strengths of composite resin applied with two different adhesive systems. Materials and Methods: One hundred mandibular third molars were sectioned parallel to the occlusal surface to expose midcoronal dentin. The dentin surfaces were polished with waterproof-polishing papers The specimens were randomly divided into 5 groups of 20 each. In group 1, the specimens were not treated with any cavity disinfectants and served as control. From groups 2 to 5. dentin surfaces were treated with the following cavity disinfectants, respectively; 2% chlorhexidine solution, 2.5% NaOCl, 1% chlorhexidine gel, 3% H2O2. The specimens were then randomly divided into 2 subgroups including ten teeth each to evaluate the effect of different bonding systems Dentin bonding systems were applied to the dentin surfaces and the composite buildups were created After the specimens were stored in an incubator for 24 h. the shear bond strength was measured at a crosshead speed of 1 mm/min. The bond strength data were analyzed with one way analysis of variance and Tukey-HSD tests. Results: There was no significant difference between chlorhexidine gel and control groups regardless of the type of the bonding agent (p > 0.05). On the other hand, pretreatment with NaOCl, H2O2 or chlorhexidine solutions had a negative effect on the shear bond strength of self-etching bonding systems Conclusion: The findings of this study suggest that when NaOCl, H2O2 or chlorhexidine solution Eire used as a cavity disinfectant, an etch-and-rinse bonding system should be preferred
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    The effects of three different desensitizing agents on the shear bond strength of composite resin bonding agents
    (ELSEVIER SCIENCE BV, 2010) Zorba, Yahya Orçun; Erdemir, Ali; Ercan, Ertuğrul; Eldeniz, Ayce Ünverdi; Kalaycıoğlu, Barış; Ülker, Mustafa
    The aim of this study was to evaluate the effects of three desensitizing agents on the shear bond strengths of four different bonding agents used to bond composite resin to dentin. A total of 160 extracted human molars were sectioned parallel to the occlusal plane under water cooling, polished and randomly divided into 4 groups of 40. Each group was treated with a different desensitizing agent (Tooth Mousse, Ultra-EZ, Cervitec Plus), except for an untreated control group. Each group was then randomly subdivided into 4 groups of 10, and a different dentin bonding agent (XP Bond, AdheSE, Adper Prompt L-pop, GBond) was applied to each group in order to bond the specimens to a resin composite (Gradia Direct) built up using a plastic apparatus. A Universal Testing Machine was used to measure the shear bond strength of each specimen. Statistical analysis was performed using one-way ANOVA and Tukey's tests. With the exception of the Control/AdheSE and Ultra-EZ/XP Bond groups, no statistically significant differences were found in the shear bond strength values of the groups tested. These findings suggest that the use of different desensitizing agents does not affect the shear bond strength of various adhesive systems used to bond resin composite to dentin. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.