Restor Dent Endod.  2019 Feb;44(1):e6. 10.5395/rde.2019.44.e6.

Evaluation of the effects of whitening mouth rinses combined with conventional tooth bleaching treatments

Affiliations
  • 1Department of Restorative Dentistry, School of Dentistry, University of North Parana, Londrina, PR, Brazil. berger.sandrine@gmail.com
  • 2Department of Dental Sciences, School of Dentistry, University of Cuiabá, Cuiabá, MT, Brazil.

Abstract


OBJECTIVES
The aim of the present study was to evaluate the effect of whitening mouth rinses alone and in combination with conventional whitening treatments on color, microhardness, and surface roughness changes in enamel specimens.
MATERIALS AND METHODS
A total of 108 enamel specimens were collected from human third molars and divided into 9 groups (n = 12): 38% hydrogen peroxide (HP), 10% carbamide peroxide (CP), 38% HP + Listerine Whitening (LW), 10% CP + LW, 38% HP + Colgate Plax Whitening (CPW), 10% CP + CPW, LW, CPW, and the control group (CG). The initial color of the specimens was measured, followed by microhardness and roughness tests. Next, the samples were bleached, and their color, microhardness, and roughness were assessed. Data were analyzed through 2-way analysis of variance (ANOVA; microhardness and roughness) and 1-way ANOVA (color change), followed by the Tukey post hoc test. The Dunnett test was used to compare the roughness and microhardness data of the CG to those of the treated groups.
RESULTS
Statistically significant color change was observed in all groups compared to the CG. All groups, except the LW group, showed statistically significant decreases in microhardness. Roughness showed a statistically significant increase after the treatments, except for the 38% HP group.
CONCLUSIONS
Whitening mouth rinses led to a whitening effect when they were used after conventional treatments; however, this process caused major changes on the surface of the enamel specimens.

Keyword

Dental enamel; Tooth bleaching; Tooth bleaching agents; Whitening mouth rinse

MeSH Terms

Dental Enamel
Humans
Hydrogen Peroxide
Molar, Third
Mouth*
Tooth Bleaching Agents
Tooth Bleaching*
Tooth*
Urea
Hydrogen Peroxide
Tooth Bleaching Agents
Urea
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