Violet LED associated with high concentration hydrogen peroxide: Effects on bleaching efficacy, pH, and temperature.

Autor: Manzoli TM; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: tatiane.manzoli@unesp.br., Costa JLSG; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: joatan_costa@hotmail.com., Besegato JF; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: besegato@outlook.com., Gelio MB; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: mariana.gelio@unesp.br., Galvani LD; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: l.galvani@unesp.br., Bordini EAF; Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo - USP, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, ZIP Code 17012-901, Bauru, São Paulo, Brazil. Electronic address: esterbordini@usp.br., Kuga MC; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: milton.kuga@unesp.br., Dantas AAR; Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, 1680 Humaitá Street - 3rd floor, Centro, Mail Box: 331, ZIP Code 14801-903, Araraquara, São Paulo, Brazil. Electronic address: andrea.rached@unesp.br.
Jazyk: angličtina
Zdroj: Photodiagnosis and photodynamic therapy [Photodiagnosis Photodyn Ther] 2022 Dec; Vol. 40, pp. 103133. Date of Electronic Publication: 2022 Sep 24.
DOI: 10.1016/j.pdpdt.2022.103133
Abstrakt: Background: This study aimed to evaluate the bleaching efficacy, pH, and temperature of 35% hydrogen peroxide (HP) gel used alone or associated with violet LED.
Methods: Sixty bovine crowns were sectioned (5 × 5 × 2mm). After staining with black tea, the specimens were randomized into four groups (n = 10) according to the bleaching protocol: HP35R: 3 × 15 min 35% HP; HP35: 1 × 45 min 35% HP; HP35VR: 3 × 8min 35% HP + Violet LED; HP35V: 1 × 24 min + Violet LED. Two bleaching sessions were performed for all the groups. Color change was evaluated before, 24h after each session, 7 days and 15 days after the last session. The variables ∆E 00 [CIEDE2000] and W ID were used for color analysis. The pH variation (initial and final) and the temperature of the gel were recorded (n = 5). ANOVA two-way for repeated measures and Bonferroni post-test was used at a significance level of 5%.
Results: HP35VR and HP35V the most noticeable color change(p < 0.05). The final values of pH were lower than the initial ones, but with no difference between the groups (p > 0.05). Groups HP35VR and HP35V showed an increase in temperature in relation to HP35R (p < 0.05).
Conclusions: Violet LED improved the bleaching efficacy of 35% HP in a time-saving manner without negatively affecting the pH and temperature of 35% HP. The renewal of HP did not influence the outcomes.
Competing Interests: Declaration of Competing Interest The authors declare that there is no conflict of interest in this article.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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