Effect of thermal treatment on the bending strength of glass ceramic/resin cement

Authors

  • Guilherme Siqueira Ferreira Anzaloni Saavedra São José dos Campus School of Dentistry- State University of São Paulo
  • Beatriz Pedrique São José dos Campus School of Dentistry- State University of São Paulo
  • Rodrigo Furtado Cavalheiro São José dos Campus School of Dentistry- State University of São Paulo
  • Alexandre Luiz Souto Borges São José dos Campus School of Dentistry- State University of São Paulo
  • Tarcisio José de Arruda Paes-Junior São José dos Campus School of Dentistry- State University of São Paulo

DOI:

https://doi.org/10.14295/bds.2012.v15i4.839

Abstract

Objectives: To investigate the effect of the thermal treatment on the bending strength of ceramic bars (VM7) treated by the cementation protocol. Material and Methods: Forty ceramic bars (20 x 4 x 1.2 mm) were constructed and randomly distributed into 2 groups (n=20): NT - without treatment/control and T – with treatment  (50°C above the glass transition temperature, for 15 min). All specimens underwent the cementation process in which one surface of the ceramic bar was etched (20 s) with 10% hydrofluoridric acid, followed by air-water jet washing (60 s), drying (30 s), silane agent application and resin cementation. After storage (distilled water/seven days at 37 ºC), the specimens were submitted to 3-point flexure test at 100% humidity/37 ºC (v=1 mm/min, load cell of 10 kgf). Results: The bending strength values and standard deviations (MPa) were: NT: 19.98 (3.17)a; T: 20.45 (4.67)a (one-way ANOVA and Tukey test, ?=0.05). Conclusions: The thermal treatment did not influence on the bending strength mean values of the ceramics studied. 

Author Biographies

Guilherme Siqueira Ferreira Anzaloni Saavedra, São José dos Campus School of Dentistry- State University of São Paulo

Doutorando em Odontologia Restauradora da Área de Prótese Dentária

Beatriz Pedrique, São José dos Campus School of Dentistry- State University of São Paulo

Graduanda em Odontologia

Rodrigo Furtado Cavalheiro, São José dos Campus School of Dentistry- State University of São Paulo

Professor Assistente do Departamento de Odontologia Restauradoura, Área de Prótese Dentária

Alexandre Luiz Souto Borges, São José dos Campus School of Dentistry- State University of São Paulo

Professor Assistente do Departamento de Odontologia Restauradoura, Área de Prótese Dentária

Tarcisio José de Arruda Paes-Junior, São José dos Campus School of Dentistry- State University of São Paulo

Professor Assistente do Departamento de Odontologia Restauradoura, Área de Prótese Dentária

Downloads

Published

2013-03-04

Issue

Section

Short Communication