Effect of sintering time on the microwave in the microstructural characteristics of dental ceramics

• Grant number: 13/18340-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2014
• End date: December 31, 2014
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Guilherme de Siqueira Ferreira Anzaloni Saavedra
• Grantee: Vinicius Cardoso Almeida
• 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

This study will evaluate the effect of sintering time by microwave energy the micro structural features based ceramic zirconia Y-TZP. The null hypothesis is that the sintering time will not influence the values of biaxial flexural strength Y-TZP disks in different groups. Seventy-five samples in disc form ceramic IPS e.max ZirCAD (12x1, 2mm) are machined according to ISO6872 for the biaxial flexure test. Are separated into groups according to the sintering time. Group I: samples are sintered for 15 minutes, Group II, the samples are sintered for 30 minutes, Group III samples are sintered for 1 hour, Group IV samples are sintered for 2 hours; Group V:the samples are sintered for 3 hours. The specimens are subjected to biaxial bending after after sintering. The qualitative analysis will be performed by means of a scanning electron microscope. For statistical analysis will be used the Weibull modulus (m) and resistance characteristic (Ã0).