Effects of In-Office and Home Bleaching Gels on the Surface Mercury Levels of Dental Amalgam

Parnian Alizadeh Oskoee; Mahdi Abed Kahnamoui; Siavash Savadi Oskoee; Firooz Zadfattah; Fatemeh Pournaghi-Azar

doi:10.1055/s-0039-1697804

European Journal of Dentistry, Table of Contents

CC BY-NC-ND 4.0 · Eur J Dent 2010; 04(01): 023-027
DOI: 10.1055/s-0039-1697804

Original Article

European Journal of Dentistry

Effects of In-Office and Home Bleaching Gels on the Surface Mercury Levels of Dental Amalgam

Authors

Parnian Alizadeh Oskoee

^aAssociate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Mahdi Abed Kahnamoui

^bAssistant Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Siavash Savadi Oskoee

^aAssociate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Firooz Zadfattah

^cDDS, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Fatemeh Pournaghi-Azar

^dPost graduate student, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.

Abstract

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ABSTRACT

Objectives: The aim of this study was to evaluate the effect of different in-office and home bleaching gels on the surface mercury levels of dental amalgam.

Methods: Sixty disk-shaped amalgam specimens (GS-80, SDI- Australia) were prepared and randomly divided into the following treatment groups: 1. Distilled water (control); 2. 15% home-bleach carbamide peroxide (Opalescence PF, Ultra dent, USA) applied for 6 h/day for 3 weeks; and 3. 35% in-office bleach carbamide peroxide (Opalescence Quick, Ultradent) applied for 30 min/week for 3 weeks. Levels of mercury were measured as weight percentages using an energy dispersive x-ray micro-analyzer detector connected to an electron microscope. Data was analyzed using one-way ANOVA and a post hoc Tukey tests (P<.05).

Results: There were no significant differences between the surface mercury levels measured following treatment with the tested home-bleach and in-office bleach products (P=0.71). However, both materials yielded significantly more mercury levels than that of the control group (P<.001).

Conclusions: The tested bleaching products significantly elevated the surface mercury levels of amalgam in vitro. (Eur J Dent 2010;4:23-27)

Key words

Tooth bleaching - Dental amalgam - Carbamide peroxide - Mercury

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References

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