Degradation kinetics of high translucence dental zirconia

• Grant number: 16/03688-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: August 01, 2016
• End date: January 31, 2018
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Renata Marques de Melo Marinho
• Grantee: Pedro Henrique Condé Oliveira Prado
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

The aim of this study is to compare, through in vitro assays, the kinetics of superficial degradation of VITA HT and VITA YZ ceramics against hydrothermal aging, evaluating specifically: a) Differences of topographical features (granules, defects and chemical properties); b) Evaluate the presence of martensitic change in high translucency ceramic; c) To analyze the flexural strength of the control and test groups; d) Build the aging curve of specimens. 180 samples will be made, 90 of each type of ceramic, distributed in the following groups: Control, Aged for 30 minutes and Aged for 90 minutes, totaling 30 samples per group for both types of ceramics. Samples will be submerged in deionized water and aged through an isothermal reactor at 134°C under pressure of 2 bars at two different aging times. The control group is exempted of any treatment. The surface of the specimens will be characterized by scanning electron microscopy (SEM), by optical perfilometry and diffraction of X-rays. For the mechanical strength analysis, discs will be done for both types of ceramic, arranged in same groups as the specimens above. The test shall be performed in a universal testing machine (Emic DL-1000, Emic, São José dos Pinhais, PR, Brazil). The results will be tallied and Tukey, Pearson and Weibull analytical means will be used to compare the variations between the groups (p=0.05).

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CONDE OLIVEIRA PRADO, PEDRO HENRIQUE; MONTEIRO, JAIANE BANDOLI; BASTOS CAMPOS, TIAGO MOREIRA; THIM, GILMAR PATROCINIO; DE MELO, RENATA MARQUES. Degradation kinetics of high-translucency dental zirconias: Mechanical properties and in-depth analysis of phase transformation. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, v. 102, FEB 2020. (16/03688-1)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PRADO, Pedro Henrique Condé Oliveira. Degradation kinetics of high transluscent dental zirconias. 2018. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Ciência e Tecnologia. São José dos Campos São José dos Campos.