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Article

The Effect of Different Bleaching Protocols, Used with and without Sodium Ascorbate, on Bond Strength between Composite and Enamel

1
Department of Restorative Dentistry, Dental School, Saint Joseph University, Beirut 11072180, Lebanon
2
Department of Clinical Sciences and Stomatology, School of Medicine, Polytechnic University of Marche, Via Tronto 10, 60126 Ancona, Italy
*
Author to whom correspondence should be addressed.
Received: 3 April 2020 / Revised: 30 May 2020 / Accepted: 5 June 2020 / Published: 15 June 2020
(This article belongs to the Special Issue Novel Biomaterials and Technology for Dental Clinical Applications)
This in vitro study aims to evaluate whether a solution of 10% sodium ascorbate (SA) may exert a beneficial effect on the bonding of composite to enamel after using different bleaching agents and protocols. Microtensile bond strength (µTBS) was evaluated on 72 freshly extracted human central incisors, divided into eight experimental groups and one control group (total n = 9): Group 1 serves as control (nonbleached). Group 2 was bleached with 5% carbamide peroxide. Group 3 was bleached with 5% carbamide peroxide and then treated with 10% SA. Group 4 was bleached with 10% carbamide peroxide. Group 5 was bleached with 10% carbamide peroxide, then treated with 10% SA. Group 6 was bleached with 16% carbamide peroxide. Group 7 was bleached with 16% carbamide peroxide, then treated with 10% SA. Group 8 was bleached with 6% hydrogen peroxide. Group 9 was bleached with 6% hydrogen peroxide, then treated with 10% SA. All groups were restored immediately after the different treatments using a resin composite. The µTBS values were measured using a universal testing machine and statistical analysis was performed by means of normality and variance analyses, SIDAK test for univariate test and multiple comparisons, and Student test to compare µTBS values of each group with the control. The mean µTBS values in groups 2, 4, 6, 8 were significantly lower than controls. For groups 3, 5, 7, 9, subjected to antioxidant (10% SA) application, all µTBS values increased significantly. However, only for Groups 3 and 5 there was no significant difference with the control. Applying 10% SA for 10 min may improve the bond strength composite/bleached enamel just when whitening is performed with 5% and 10% carbamide peroxide. View Full-Text
Keywords: hydrogen peroxide; carbamide peroxide; sodium ascorbate; antioxidant; microtensile bond strength hydrogen peroxide; carbamide peroxide; sodium ascorbate; antioxidant; microtensile bond strength
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MDPI and ACS Style

Ghaleb, M.; Orsini, G.; Putignano, A.; Dabbagh, S.; Haber, G.; Hardan, L. The Effect of Different Bleaching Protocols, Used with and without Sodium Ascorbate, on Bond Strength between Composite and Enamel. Materials 2020, 13, 2710. https://0-doi-org.brum.beds.ac.uk/10.3390/ma13122710

AMA Style

Ghaleb M, Orsini G, Putignano A, Dabbagh S, Haber G, Hardan L. The Effect of Different Bleaching Protocols, Used with and without Sodium Ascorbate, on Bond Strength between Composite and Enamel. Materials. 2020; 13(12):2710. https://0-doi-org.brum.beds.ac.uk/10.3390/ma13122710

Chicago/Turabian Style

Ghaleb, Maroun, Giovanna Orsini, Angelo Putignano, Sarah Dabbagh, Georges Haber, and Louis Hardan. 2020. "The Effect of Different Bleaching Protocols, Used with and without Sodium Ascorbate, on Bond Strength between Composite and Enamel" Materials 13, no. 12: 2710. https://0-doi-org.brum.beds.ac.uk/10.3390/ma13122710

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