Effect of 7.5% hydrogen peroxide containing remineralizing agents on hardness, color change, roughness and micromorphology of human enamel

Autor(es)

Sasaki, Robson Tetsuo ^[1] ; Catelan, Anderson ^[1] ; dos Santos Bertoldo, Carlos Eduardo ^[1] ; Venancio, Paulo Cesar ^[2] ; Groppo, Francisco Carlos ^[3] ; Bovi Ambrosano, Glaucia Maria ^[4] ; Marchi, Giselle M. ^[1] ; Nunes Leite Lima, Debora Alves ^[1] ; Baggio Aguiar, Flavio Henrique ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Restorat Dent, Piracicaba Dent Sch, Piracicaba - Brazil

^[2] Univ Estadual Campinas, Tech Coll Limeira, Limeira - Brazil

^[3] Univ Estadual Campinas, Dept Pharmacol Anesthesiol & Therapeut, Piracicaba - Brazil

^[4] Univ Estadual Campinas, Dept Social Dent, Piracicaba Dent Sch, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF DENTISTRY; v. 28, n. 5, p. 261-267, OCT 2015.
• Citações Web of Science: 3

Resumo

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. (AU)

• Processo FAPESP: 09/03354-2 - Microdureza, rugosidade superficial, análise morfológica e de alteração de cor de esmalte submetido a tratamentos clareadores, utilizando agentes clareadores contendo Cálcio, ACP, Flúor e/ou Hidroxiapatita
• Beneficiário: Robson Tetsuo Sasaki
• Modalidade de apoio: Bolsas no Brasil - Mestrado