Journal of Conservative Dentistry
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Year : 2018  |  Volume : 21  |  Issue : 4  |  Page : 433-437

Effect of high concentrated fluoride-based dentifrice on the hardness, roughness, and color of the bleached enamel

Department of Restorative Dentistry, Dental College, Federal University of Pará, Belém, PA, Brazil

Correspondence Address:
Dr. Cecy Martins Silva
Av. Augusto Corrêa, 001, Guamá, 66000000 - Belém, PA
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JCD.JCD_318_17

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Context: Remineralizing agents have been recommended to restore the integrity of bleached enamel. Aims: The aim of this study was to evaluate the effect of fluoride at high concentration (5000 ppm) applied to bleached enamel. Materials and Methods: A total of 30 specimens obtained from newly extracted third molars were divided into two groups (n = 15) as follows: control group and fluoride group. Specimens of both groups received bleaching treatment with 35% hydrogen peroxide, were then submitted to the Vickers hardness number/colorimetric test (VHN/CT) (n = 5) and Ra (n = 10) tests, and stored in artificial saliva. After bleaching, fluoride group received the application of a fluoride-based dentifrice, during 5 min. VHN, RS, and CT analysis of both groups were performed before and after treatments. For VHN, five indentations per specimen were performed, using a microdurometer. Ra analysis was performed with a rugosimeter. The color was analyzed through the CIE L* a* b* system, respectively, using a colorimeter. Statistical Analysis: For intergroup statistical analysis, ANOVA with Tukey's posttest was used. All tests were calculated at a significance level of 5%. Results: There was statistically significant difference (P < 0.01) between the analyzed groups, on VHN, Ra, and CT evaluations. Conclusions: The use of fluoride-based dentifrice at 5000 ppm was effective in minimizing the deleterious effects on bleached enamel.

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