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Effect of erosive challenges on microhardness and surface roughness ofresininfiltrant and sealant

Grant number: 19/11396-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2019
Effective date (End): July 31, 2020
Field of knowledge:Health Sciences - Dentistry
Principal Investigator:Giselle Maria Marchi Baron
Grantee:Janaina Cardoso Santos Couto
Home Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


The aim of this study was to evaluate the microhardness (MS) and surface roughness (SR) of three materials used as surface protectors: Icon® commercial infiltrant (IC), experimental infiltrant (IE) and Prevent resin sealant (SR). Resin disks of the materials (n=120) will be made and then the initial tests of microhardness and roughness will be made. After, they will be divided into 2 subgroups (n = 20) for erosive simulation in different solutions: by gastric acid and refrigerant. The demineralizing cycle (DES) and remineralizing (RE) by gastric acid with pH=2.3 will be 2min in DES solution and 60min in RE solution of artificial saliva; and by refrigerant with pH=2.9 will be 5min in DES solution and 60min in artificial saliva RE solution. The cycling for both solutions will be performed 4 times a day for 5 days. At the end of the cycling, the specimens will be kept in relative humidity and evaluated again for the surface. The data will be tabulated and analyzed by two-way ANOVA and Tukey test for comparison between groups of materials used with a statistical significance level of 5%.