Effect of hydrothermal aging on the physical and mechanical properties of a zirconia system

• Grant number: 22/13426-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2022
• End date: November 30, 2023
• Field of knowledge: Health Sciences - Dentistry
• Principal Investigator: Estevam Augusto Bonfante
• Grantee: Elisa de Souza Fermino
• Host Institution: Faculdade de Odontologia de Bauru (FOB). Universidade de São Paulo (USP). Bauru , SP, Brazil
• Associated research grant: 21/06730-7 - Towards sustainable zirconia recycled from milling waste and boosted by glass infiltration for restorative use, and of the development of strong, graded, and aging resistant multilayered zirconia blocks, AP.JP2

Abstract

The aim of this study is to investigate the effect of the hydrothermal aging on the physical and mechanical properties of an in-lab processed yttria-stabilized tetragonal zirconia polycyrstals (3Y-TZP). After sintering and polishing, half of the specimens will be aged and characterized by scanning electron microscopy (SEM) and x-ray diffraction (XRD). The density will be determined using Archimedes principle. Optical properties will be evaluated in a spectrophotometer using reflectance tests. The hardness will be calculated using Vickers indentation test. The biaxial flexural strength test will be conducted to determine the probability of survival, Weibull modulus and characteristic strength.