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Randomized Controlled Trial
. 2024 Mar 25:32:e20230416.
doi: 10.1590/1678-7757-2023-0416. eCollection 2024.

In-office dental bleaching in adolescents using 6% hydrogen peroxide with and without gingival barrier: a randomized double-blind clinical trial

Taynara de Souza Carneiro  1   2 , Michael Willian Favoreto  1 , João Pedro Ferreira Rodrigues  1 , Elisama Sutil  1 , Gabrielle Gomes Centenaro  1 , Isabela de Matos de Freitas  1 , Alessandra Reis  1 , Laura Ceballos García  2 , Alessandro Dourado Loguercio  1
Affiliations
Randomized Controlled Trial

In-office dental bleaching in adolescents using 6% hydrogen peroxide with and without gingival barrier: a randomized double-blind clinical trial

Taynara de Souza Carneiro et al. J Appl Oral Sci. .

Abstract

Background: At low concentrations used for in-office bleaching gels, such as 6% HP, gingival barrier continues to be performed. If we take into account that, in the at-home bleaching technique, no barrier is indicated, it seems that the use of a gingival barrier fails to make much sense when bleaching gel in low concentration is used for in-office bleaching.

Objective: This double-blind, split-mouth, randomized clinical trial evaluated the gingival irritation (GI) of in-office bleaching using 6% hydrogen peroxide (HP) with and without a gingival barrier in adolescents, as well as color change and the impact of oral condition on quality of life.

Methodology: Overall, 60 participants were randomized into which side would or would not receive the gingival barrier. In-office bleaching was performed for 50 minutes with 6% HP in three sessions. The absolute risk and intensity of GI were assessed with a visual analogue scale. Color change was assessed using a digital spectrophotometer and color guides. The impact of oral condition on quality of life was assessed using the Brazilian version of the Oral Health Impact Profile (α=0.05).

Results: The proportion of patients who presented GI for the "with barrier" group was 31.6% and for the "without barrier" group, 30% (p=1.0). There is an equivalence for the evaluated groups regarding GI intensity (p<0.01). Color change was detected with no statistical differences (p>0.29). There was a significant impact of oral condition on quality of life after bleaching (p<0.001).

Conclusions: The use or not of the gingival barrier for in-office bleaching with 6% HP was equivalent for GI, as well as for bleaching efficacy, with improvement in the impact of oral condition on quality of life.

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Conflict of interest statement

Conflict of interest

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1. Appearance of gingival irritation with burns in a patient subjected to 35% hydrogen peroxide bleaching gel during in-office bleaching. This concentration of hydrogen peroxide was not evaluated in the present study
Figure 2
Figure 2. The CONSORT Flow Diagram of study design phases, including enrollment and allocation criteria
Figure 3
Figure 3. Appearance of gingival irritation in a patient subjected to 6% hydrogen peroxide bleaching gel during in-office bleaching. Despite the nearly imperceptible nature of gingival irritation, the patient reported experiencing irritation in the gingival area below teeth #31 and 41
See this image and copyright information in PMC

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