Analysis of penetration of H2O2 in demineralized teeth and subject to bleaching

• Grant number: 12/07086-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2012
• End date: October 31, 2013
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: André Luiz Fraga Briso
• Grantee: Fernanda Bernardi da Costa
• Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil

Abstract

The present study aims to analyze the trans-enamel and trans-dentinal penetration of hydrogen peroxide, considering the presence of demineralization in dental enamel. To standardize the substrate, will analyze the microhardness of 70 bovine teeth being selected from the 30 specimens with values closer to the average. The specimens will be divided into two groups (n = 15), according to the factors studied: intact enamel and demineralized enamel (white spot - experimental). Each specimen will receive a 0.04 mL whitening product based on hydrogen peroxide 35% (Whiteness HP Maxx - FGM Dental Products), in each bleaching session. The procedure will be repeated 3 times with one-week intervals between sessions. To quantify the penetration of H2O2 specimens will be placed in artificial pulp chambers (CPA) containing acetate buffer solution that will be collected for evaluating the optical density Reflectance Spectrophotometer, Model UV-2450(Shimadzu, Kyoto, Japan). The data will be evaluated for homogeneity and homoscedasticity for determining the most appropriate statistical tests. A significance level of 5% will be adopted.(AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ANDRÉ LUIZ FRAGA BRISO; RAFAEL SIMÕES GONÇALVES; FERNANDA BERNARDI DA COSTA; MARJORIE DE OLIVEIRA GALLINARI; LUCIANO TAVARES ANGELO CINTRA; PAULO HENRIQUE DOS SANTOS. Demineralization and Hydrogen Peroxide Penetration in Teeth with Incipient Lesions. Brazilian Dental Journal, v. 26, n. 2, p. 135-140, 2015-04-00. (12/07086-5)