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Type: Artigo de periódico
Title: Effect Of 7.5% Hydrogen Peroxide Containing Remineralizing Agents On Hardness, Color Change, Roughness And Micromorphology Of Human Enamel
Author: Sasaki
Robson Tetsuo; Catelan
Anderson; dos Santos Bertoldo
Carlos Eduardo; Venancio
Paulo Cesar; Groppo
Francisco Carlos; Bovi Ambrosano
Glaucia Maria; Marchi
Giselle M.; Nunes Leite Lima
Debora Alves; Baggio Aguiar
Flavio Henrique
Abstract: Purpose: To determine the microhardness, color change, surface roughness, and micromorphology of tooth enamel submitted to bleaching treatment with 7.5% hydrogen peroxide (HP) with added calcium, amorphous calcium phosphate, sodium fluoride (NaF), and hydroxyapatite (HA). Methods: 80 enamel slabs were used (n = 10). Three commercial agents [Pola Day 7.5%, Day White ACP 7.5% (DW-ACP), and White Class Calcium 7.5% (WC-Calcium)], three experimental (7.5% HP+NaF, 7.5% HP+HA, and 7.5% PH+NaF+HA), a positive control (with HP), and a negative control (without HP) groups were assessed. The commercial products were applied according to manufacturers' recommendations and the experimental ones were applied for 1.5 hours daily. During and after treatment, specimens were stored in artificial saliva. Tests were performed at baseline, 7, 14, 21, 28, and 35 days. Data were analyzed by ANOVA and Tukey's test (a=0.05). Results: DW-ACP presented lower microhardness and HP+HA presents the highest values (P < 0.05); only the experimental group presented color change similar to the commercial agents (P > 0.05). Overall, roughness increased with time (P < 0.05) and porosities, and deposition of crystalline structures in groups HP+HA and HP+NaF+HA were noted. The HP+HA agent was capable of reducing the loss of enamel microhardness due to bleaching and also present color change similar to the commercial products.
Subject: 10-percent Carbamide Peroxide
Scanning Electron-microscopy
Bleaching Agents
Dentin Microhardness
Demineralized Enamel
Bond Strength
Country: WESTON
Rights: fechado
Identifier DOI: 
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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