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VOLUME 19 , ISSUE 3 ( March, 2018 ) > List of Articles


Effect of At-home and In-office Bleaching on Marginal Microleakage in Composite Resin Restorations using Two Adhesive Systems

Celso A Klein, Douglas da Silva, Eduardo G Reston, Diana LB Borghetti, Roberto Zimmer

Citation Information : Klein CA, da Silva D, Reston EG, Borghetti DL, Zimmer R. Effect of At-home and In-office Bleaching on Marginal Microleakage in Composite Resin Restorations using Two Adhesive Systems. J Contemp Dent Pract 2018; 19 (3):248-252.

DOI: 10.5005/jp-journals-10024-2246

License: CC BY 3.0

Published Online: 01-04-2013

Copyright Statement:  Copyright © 2018; The Author(s).



The aim of this study is to assess marginal microleakage of cervical cavities restored with composite resins and two different adhesive techniques subjected to at-home and in-office bleaching.

Materials and methods

In this randomized, blind laboratory experiment, 60 bovine teeth recently extracted were collected and divided into six groups (n = 10 each group). The teeth received cervical cavity preparations (2 mm × 3 mm × 1 mm) with enamel margins. Two different adhesive systems were used (Single Bond 2 and Clearfil SE Bond), in addition to composite resin (Z250). Restored teeth received two different bleaching gels (Opalescence PF and Opalescence Boost). Teeth were thermocycled and analyzed under confocal laser scanning microscopy.


No significant differences were observed (p > 0.05) in microleakage scores between the two groups not subjected to bleaching nor between the four groups that received bleaching treatment (p > 0.05), regardless of the gel and adhesive system employed. However, when comparing nonbleached with bleached teeth, those not subjected to bleaching showed statistically lower marginal microleakage scores (p < 0.05). Data were statistically analyzed using the Kruskal–Wallis test followed by Student–Newman–Keuls post hoc test, with significance set at 5%.


Marginal microleakage in composite resin restorations is influenced by the action of bleaching agents used both at-home and in-office, regardless of the adhesive system employed (total-etch or self-etch).

Clinical significance

Both at-home and in-office bleaching agents have an influence on the adhesive interface of resin restorations, producing changes and inducing marginal leakage.

How to cite this article

Klein Jr CA, da Silva D, Reston EG, Borghetti DLB, Zimmer R. Effect of At-home and In-office Bleaching on Marginal Microleakage in Composite Resin Restorations using Two Adhesive Systems. J Contemp Dent Pract 2018;19(3):248-252.

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