Assessment of nanohardness, nanoleakage, and elastic modulus at the adhesive interface after applying the ethanol weting dentin technique

• Grant number: 17/13640-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2017
• End date: October 31, 2018
• Field of knowledge: Health Sciences - Dentistry
• Principal Investigator: Eduardo Bresciani
• Grantee: Jessica Lopes de Andrade
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

The aim of this study is to evaluate the effect of ethanol-wet-bonding (EWB) on dentin infiltration of a multimode self-etch adhesive (smear layer maintained), by means of nanohardness, elastic modulus and nanoleakage; besides the assessment of interface degradation after 6-month simulated aging. Forty eight bovine incisors which will have buccal dentin exposed and the smear layer standardized, will be divided into 2 groups, according to the use or not of ethanol prior to the application of the universal adhesive system in self-etch mode (Single Bond Universal - 3M ESPE). Then blocks of composite resin (Filtek Z350xt - 3M ESPE) will be made. However, half of specimens (n=12) will be stored in deionized water for 48 h to allow a post cure time of the adhesive. (1) The other half of each group will be stored in deionized water for 6 months to evaluate after aging. Two specimens from each group will be selected for Scanning Electron Microscopy (SEM) analysis. The remaining specimens will be divided in half, originating hemi-crowns. Since 10 hemi-crowns will have the adhesive interface qualitatively analyzed by SEM after nanoleakage by silver nitrate (Ag), before and after artificial aging. Finally, the other hemi-crowns will be analyzed by nanohardness and elastic modulus of the composite resin layer, adhesive layer, hybrid layer and dentin. The data obtained will be analyzed using two-way ANOVA of repeated measures and Tukey test, being that the tests will have a level of significance to 5%. (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)

SOUZA, MAURICIO YUGO; ANDRADE, JESSICA LOPES; FERRAZ CANEPPELE, TACIANA MARCO; BRESCIANI, EDUARDO. Assessment of nanohardness, elastic modulus, and nanoleakage of the adhesive interface using the ethanol-wet-bonding technique. INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, v. 99, JUN 2020. (17/13640-9)