Analysis of the influence of manipulation of non-simplified dentin bonding systems on degree of conversion and superficial micro hardness

• Grant number: 14/17225-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2016
• End date: December 31, 2016
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Linda Wang
• Grantee: Rafaela Pascon
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil

Abstract

Manipulation of dentin bonding systems can interfere on the adhesive quality overtime. The aim of this study is to simulate routine conditions on clinical practice on the properties considered on bonding. The null hypothesis to be tested are: 1- there is no difference of degree of conversion (DC) and superficial microhardness (SM) between two no-simplified dentin bonding systems; 2- There is no difference of DC and SM regarding manipulation forms. Two no simplified denting bonding systems, Scotchbond multipurpose (MP) and Clearfil SE Bond (SE) will be tested. A solvated group will also be tested as a comparative group(Single Bond Universal. Simulations will involve four conditions: At room (C), Removed from refrigerator (R), aged in clinical routine during 2 weeks (CA) and aged in laboratory (LA). Degree of conversion will be assessed with Fourier transform infrared (FTIR) and by superficial microhardness (Knoop 25g/10s) for all these conditions. Data will be collected and statistically analyzed.