Evaluation of biaxial flexural strength and modulus of filled and unfilled adhesive systems

Authors

  • Michele Santana Liberti FOP/UNICAMP
  • Donald Mettenburg Medical College of Georgia
  • César Augusto Galvão Arrais Universidade de Guarulhos
  • Frederick Allen Rueggeberg Medical College of georgia
  • Marcelo Giannini FOP/UNICAMP

Keywords:

Dentin-bonding agents, flexural strength, flexural modulus

Abstract

Purpose: The purpose of this study was to evaluate the flexural strength and modulus of two adhesive systems using biaxial flexural strength test. Methods: The bonding agents (Pentron Clinical Technologies) tested were: Bond 1 (B1) and NanoBond (NB). Thirteen disks (6.1 mm diameter and 0.6 mm thick) were prepared with adhesive solutions of each bonding agents using Teflon molds. The adhesive solutions within the molds were light-activated with XL 3000 curing unit (3M ESPE) for 10 s on both sides. The disks were stored for 10 days and were tested in a universal testing machine (1.27 mm/min – Instron 5844). Data were statistically analyzed by one-way ANOVA (α=0.05). Results: The mean values of fracture strength (±SD) for adhesive systems were (in MPa): B1- 89.7±7.6 e NB- 131.1±9.5. Modulus means (±SD) were (in MPa): B1- 1999.9±258.4 e NB- 2314.5±271.0. Conclusion: The filled adhesive system (NB) exhibited higher strength and flexural modulus means than the unfilled adhesive B1. Key words: Dentin-bonding agents; flexural strength; flexural modulus

Author Biographies

Michele Santana Liberti, FOP/UNICAMP

Departamento de Odontoogia Restauradora - Área de Dentística

Donald Mettenburg, Medical College of Georgia

Departamento de Reabilitação Oral

César Augusto Galvão Arrais, Universidade de Guarulhos

Departamento de Dentística

Frederick Allen Rueggeberg, Medical College of georgia

Departamento de Reabilitação Oral

Marcelo Giannini, FOP/UNICAMP

Departamento de Odontoogia Restauradora - Área de Dentística

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Published

2008-12-03

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Section

Original Article