Effect of heat treatment, and glaze of aging on the flexural strength of glass-ceramic

• Grant number: 12/00299-3
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2012
• End date: December 31, 2012
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Guilherme de Siqueira Ferreira Anzaloni Saavedra
• Grantee: Rafael Brizola Vieira
• Host Institution: Faculdade de Odontologia (FOSJC). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil

Abstract

The purpose of the study will be investigate the hypothesis that the heat treatment (annealing), glazy and thermomechanical aging affect the values of flexural strength of a glass-ceramic. Forty-eight ceramic bars (1.2x4x20mm) (VM7 VITA Zahnfabrik), will be subject to four conditions: Group C (control) without treatment, Group A: Anneling, Group G: Glaze and Group AG: Association anneling and glaze. After storage (distilled water / seven days at 37 ° C), half of the samples are subjected to thermomechanical aging process. Subsequently each sample will be taken to the testing device, which is engaged in a universal testing machine (EMIC) with load cell 10Kgf, speed of 1.0 mm / min and tested on 3-point mechanical bending. The data will be subjected to statistical analysis. (AU)