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. 2020 Jul 1;12(7):e644-e649.
doi: 10.4317/jced.56917. eCollection 2020 Jul.

The bleaching efficacy of carbamide peroxide gels containing potassium nitrate desensitizer

Adriana-Osten Costacurta  1 , Carolina-Elisa-Pereira Borges  2 , Camila Centenaro  3 , Gisele-Maria Correr  4 , Marina-da Rosa Kaizer  4 , Carla-Castiglia Gonzaga  5
Affiliations

The bleaching efficacy of carbamide peroxide gels containing potassium nitrate desensitizer

Adriana-Osten Costacurta et al. J Clin Exp Dent. .

Abstract

Background: To evaluate the bleaching efficacy of at-home carbamide peroxide (CP) gels in two concentrations, containing or not a desensitizing agent.

Material and methods: Forty incisors were divided into four groups (n=10), according to gel concentrations (10% or 22%), and presence or not of 3% potassium nitrate in the gel. A thin layer of gel was applied to the buccal surface of each tooth for 2h/day for 4 weeks. Bleaching efficacy was measured using a spectrophotometer, and ∆E*ab, ∆E00 and ∆WID were calculated. Measurements were performed at baseline, 7, 14, 21, 28, and 35 days following the first gel application. Data were analyzed by two-way RM-ANOVA and Tukey's test (α=0.05).

Results: Regarding gel concentration or potassium nitrate inclusion, both gels resulted in color change above the perceptibility thresholds, which were similar between gels. Regarding time, significant differences were observed between color change values at 7 days and other time periods. ∆WID ranged from 3.8 to 9.6. Significant moderate to strong positive correlation was observed among the parameters.

Conclusions: Nor the CP concentration, neither the inclusion of potassium nitrate in the gel, had influence on bleaching efficacy. All gels were effective and showed good results from the first weeks' application. Key words:Tooth bleaching, carbamide peroxide, desensitizer, potassium nitrate, color.

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Conflict of interest statement

Conflicts of interest The authors deny any conflicts of interest related to this study.

Figures

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Figure 4
Color change parameters (∆E*ab, ∆E00 and ∆WID) for follow-up times compared to the immediately preceding time for the assessed groups.
See this image and copyright information in PMC

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