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Open AccessArticle

Effect of Non-Vital Bleaching on the Durability of Resin–Dentin Bond with an Ethanol-Based Etch-And-Rinse Adhesive

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Dental Research Center, Mashhad University of Medical Sciences, P.O. Box 9177948959, Mashhad, Iran
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Department of Pediatric Dentistry, Faculty of Dentistry, Sihhiye 06100, Turkey
3
Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, P.O. Box 9177948959, Mashhad, Iran
*
Author to whom correspondence should be addressed.
Biomimetics 2018, 3(4), 35; https://doi.org/10.3390/biomimetics3040035
Received: 23 August 2018 / Revised: 18 October 2018 / Accepted: 26 October 2018 / Published: 6 November 2018
(This article belongs to the Special Issue Biomimetic Restorative Dentistry)
To evaluate the bleaching procedure and application of sodium ascorbate on dentin bond durability, the enamel surface of intact human third molars (n = 18) were removed, and the teeth were randomly divided into two groups for immediate and six-month bond strength evaluation. The specimens were further assigned into three subgroups according to treatment procedure, as follows: subgroup A, no bleaching (positive control) was performed prior to the etch-and-rinse bonding with single bond and subsequent build-up with Z250 composite; subgroup B, the samples were bleached with 20% carbamide peroxide 6 h/day for five consecutive days prior to bonding; and subgroup C, bleaching was performed as in subgroup B, after which 10% sodium ascorbate was applied on dentin surface for 10 min before the bonding procedures. A microtensile bond strength test was performed and the failure modes were evaluated under a stereomicroscope. The data were analyzed using two-way analysis of variance (ANOVA) and Tukey’s post-hoc tests with a level of significance of 0.05. Bleaching significantly decreased the immediate and six-month bond strength. The application of sodium ascorbate had no significant effect on the immediate and six-month bond strength of bleached specimens. We conclude that the bleaching procedure may decrease the durability of the resin–dentin bond of the tested etch-and-rinse adhesive. View Full-Text
Keywords: teeth bleaching; matrix metalloproteinases; sodium ascorbate; dentin bonding agent teeth bleaching; matrix metalloproteinases; sodium ascorbate; dentin bonding agent
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Boruziniat, A.; Atoufi, A.; Chehreli, Z.; Akbari, M.; Gifani, M. Effect of Non-Vital Bleaching on the Durability of Resin–Dentin Bond with an Ethanol-Based Etch-And-Rinse Adhesive. Biomimetics 2018, 3, 35.

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