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

Grant number: 19/25671-1
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): February 01, 2020
Effective date (End): December 31, 2020
Field of knowledge:Health Sciences - Dentistry - Dental Materials
Principal researcher:Ana Carolina Pero
Grantee:Marília Popts Cleto
Home 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 the 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 a 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%. (AU)

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