Influence of the post-curing method on the physical and mechanical properties of resin composites for additive manufacturing modified by the addition of TiO2 nanoparticles doped with manganese

• Grant number: 23/12518-6
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: March 01, 2024
• End date: December 07, 2024
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Adilson Yoshio Furuse
• Grantee: Pedro Henrique Magão
• Supervisor: Fabio Antonio Piola Rizzante
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Institution abroad: Medical University of South Carolina (MUSC), United States
• Associated to the scholarship: 22/11632-7 - Influence of experimental post-polymerization chamber in resin composites for 3D printing modified by manganese-doped TiO2 nanoparticles on physical, optical, mechanical and biological properties, BP.DR

Abstract

Additive manufacturing technology, better known as 3D printing, has been gaining popularity because of its versatility of applications, precision, ability to create complex shapes, speed and less waste of inputs. As a property of particular interest, the photocatalytic activity performed by TiO2 nanostructures when changing from an insulator to a conductor could have the capacity to improve the 3D printing solutions already available today. The aim of this work will be to evaluate the influence of adding manganese-doped TiO2 nanoparticles to different 3D printing materials and the post-curing method used on their physical and mechanical properties. Systems commercially available in the United States for the additive manufacturing of permanent restorations will be evaluated. In order to test this hypothesis, nanoparticles will be incorporated into resins at a ratio of 0.5% by mass. The specimens will be divided into groups according to the base resin used, the concentration of nanoparticles incorporated (0 or 0.5% by mass) and the post-curing system to be used (a post-curing chamber marketed for this purpose, experimental post-curing chamber combining UV and white light and broad-spectrum light-curing device). The following will be evaluated: flexural strength, modulus of elasticity, color stability, manufacturing accuracy, Knoop microhardness, contact angle and surface energy. Adopting an overall significance level of 5%, the results will be analyzed using analysis of variance tests and Tukey's multiple comparison tests. (AU)