PDF icon PDF herunterladen
Open Access
CC BY-NC-ND 4.0 · European Journal of General Dentistry 2021; 10(01): 001-006
DOI: 10.1055/s-0041-1732773
Original Article

Impact of Bioactive Glass-Based Toothpaste on Color Properties and Surface Microhardness of Bleached Enamel

Raíssa Manoel Garcia
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - Unicamp, Piracicaba, SP, Brazil
,
Waldemir Francisco Vieira-Junior
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - Unicamp, Piracicaba, SP, Brazil
2   Department of Restorative Dentistry, São Leopoldo Mandic Institute and Dental Research Center, Campinas, SP, Brazil
,
Jéssica Dias Theobaldo
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - Unicamp, Piracicaba, SP, Brazil
,
Flávio Henrique Baggio Aguiar
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - Unicamp, Piracicaba, SP, Brazil
,
Débora Alves Nunes Leite Lima
1   Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - Unicamp, Piracicaba, SP, Brazil
› Institutsangaben
Funding This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.
› Weitere Informationen
Auch verfügbar aufeRef
  Lizenzen und Reprints
Preview

Abstract

Objective The role of toothpaste used during aesthetic treatments is rarely investigated. The objective was to evaluate the effects of a bioactive glass-based toothpaste (BGT) used before or after the dental bleaching with 35% hydrogen peroxide (HP).

Materials and Methods Bovine enamel blocks (4 × 4 mm; n = 12) were submitted to tooth bleaching and different treatments/storage, before or after HP, based on: (1) no toothpaste and immersion in artificial saliva (AS) after HP for 24 hours, 7 days, or 14 days (control); (2) daily BGT use and AS storage for 7 or 14 days (after HP); and (3) daily BGT use and AS storage for 7 or 14 days (prior to HP). Surface and in-depth color were determined using the CIE L*a*b* system (ΔL*, Δa*, Δb*, and ΔE) on enamel surface and underlying dentin. The surface microhardness (SMH) was evaluated using a Knoop microhardness tester.

Statistical Analysis Data were submitted to analysis of variance (ANOVA) (color variables), repeated measures ANOVA (SMH), and Tukey’s test (α = 0.05).

Results The color changes on the enamel or underlying dentin were not statistically different among the groups (p > 0.05). Twenty-four hours after HP presented a decrease in SMH differing from baseline (p < 0.01). This decrease did not occur in the groups previously exposed to BGT (p > 0.05). BGT use after HP for 7 days differed from group with exclusive AS storage (p < 0.05).

Conclusion In-office tooth bleaching can decrease the microhardness of enamel surface; however, the use of BGT promotes the protection or enables the mineral recovery of tooth without the influence the bleaching efficacy.

Keywords

hydrogen peroxide - surface properties - tooth bleaching - tooth bleaching agents


Publikationsverlauf

Artikel online veröffentlicht:
11. August 2021

© 2021. European Journal of General Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Thieme Medical and Scientific Publishers
Thieme Medical and Scientific Publishers Pvt. Ltd. A-12, 2nd Floor, Sector 2, Noida-201301 UP, India