KMID : 1034420230480040033
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Restorative Dentistry & Endodontics 2023 Volume.48 No. 4 p.33 ~ p.33
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Evaluation of at-home bleaching protocol with application on different surfaces: bleaching efficacy and hydrogen peroxide permeability
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Heloisa Forville
Michael Willian Favoreto Michel Wendlinger Roberta Micheten Dias Christiane Philippini Ferreira Borges Alessandra Reis Alessandro D. Loguercio
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Abstract
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Objectives : This study aimed to evaluate the bleaching efficacy and hydrogen peroxide permeability in the pulp chamber by the at-home bleaching gel in protocols applied on different dental surfaces.
Materials and Methods : Forty premolars were randomly into 4 groups: control group no bleaching, only application on the buccal surface (OB), only application on the lingual surface (OL) and application in buccal and lingual surfaces, simultaneously (BL). At-home bleaching gel (White Class 7.5%) was used for the procedure. The bleaching efficacy was evaluated with a digital spectrophotometer (color change in CIELAB [¥ÄE ab] and CIEDE 2000 [¥ÄE 00] systems and Whitening Index for Dentistry [¥ÄWID]). The hydrogen peroxide permeability in the pulp chamber (¥ìg/mL) was assessed using UV-Vis spectrophotometry and data were analyzed for a 1-way analysis of variance and Tukey¡¯s test (¥á = 0.05).
Results : All groups submitted to bleaching procedure showed bleaching efficacy when measured with ¥ÄE ab and ¥ÄE 00 (p > 0.05). Therefore, when analyzed by ¥ÄWID, a higher bleaching efficacy were observed for the application on the groups OB and BL (p = 0.00003). Similar hydrogen peroxide permeability was found in the pulp chambers of the teeth undergoing different protocols (p > 0.05).
Conclusions : The application of bleaching gel exclusively on the OB is sufficient to achieve bleaching efficacy, when compared to BL. Although the OL protocol demonstrated lower bleaching efficacy based on the ¥ÄWID values, it may still be of interest and relevant in certain clinical scenarios based on individual needs, requiring clinical trials to better understand its specificities.
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KEYWORD
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Color shade, Dental enamel permeability, Hydrogen peroxide, Tooth bleaching, Tooth whitening
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