Evaluation of shear bond strength between artificial teeth attached to a denture base resin used for 3D printing

• Grant number: 19/25671-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2020
• End date: December 31, 2020
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Ana Carolina Pero
• Grantee: Marília Popts Cleto
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

The aim of this study will be to evaluate the bond strength between artificial teeth obtained by additive digital manufacturing (3D printing) or prefabricated conventional acrylic resin and a denture base resins using different bonding agents (self-curing acrylic resin, 3D printing resin and MMA methyl methacrylate + 3D printing resin). The specimens will correspond to artificial teeth, upper first molars embedded in the colorless self-curing acrylic resin polymer bonded to a 3D-printed base resin or a conventional heat-polymerized denture base resin. The evaluations will be performed by means of mechanical shear test by applying a force perpendicular to the artificial tooth - denture base resin, through a chisel at a speed of 1mm / min until fracture of the resin occurs. Thus, the bond strength (MPa) between artificial tooth and denture base resin will be evaluated considering three variation factors: artificial tooth, denture base resin and bonding agent. The data will be submitted to statistical analysis by appropriate tests, according to their adherence to the assumptions of normality, with a significance level of 5%.