Effect of sandblasting with different materials on the adhesion of composite to enamel and dentin

• Grant number: 22/10594-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: May 01, 2023
• End date: February 29, 2024
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Marcelo Giannini
• Grantee: Tainah Oliveira Rifane
• Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil

Abstract

This project proposes to evaluate the microtensile bond strength of an"universal" adhesive applied to enamel and dentin, which will be subjected to differentpretreatments, including acid etching and blastings. In addition, the tooth-adhesiveinterface micromorphology will be analyzed according to different surfacepretreatments. The experimental design for enamel will involve three treatments: I-substrate (intact or abraded), II- surface treatment (aluminum oxide sandblasting or 35%phosphoric acid), and III- "universal" adhesive application mode (etch-and-rinse or self-etch). The experimental design for dentin will involve three treatments: I- surfacetreatment (aluminum oxide, bioglass blasting or 35% phosphoric acid), II- adhesiveapplication mode (etch and rinse or self-etch), and III- incorporation of VSG- 2Fbioactive particles into the adhesive. The extracted molars will be prepared for bondingprocedures (to enamel and dentin) and sectioned to obtain resin-dentin stick-shapedspecimens for microtensile bond strength test (n=8). The resin-enamel and dentinmicromorphology will be analyzed by transmission electron microscopy (TEM, n=5)and the remineralization potential assessment will perform with Fourier transformspectroscopy (FTIR-ATR, n=5). The bond strength data obtained will be analyzed bySPSS software, and in case of normality, analysis of variance and Tukey's Test (p<0.05)will be applied. The TEM images and ATR-FTIR assay will have descriptive analysesof the findings.