Repair of amalgam restorations with conventional and bonded amalgam: an <i>in vitro</i> study

  • Daniela Araújo Veloso Popoff Universidade Federal de Minas Gerais
  • Fabiana Santos Gonçalves Universidade Federal de Minas Gerais
  • Raquel Conceição Ferreira Unimontes
  • Cláudia Silami Magalhães Universidade Federal de Minas Gerais
  • Allyson Nogueira Moreira Universidade Federal de Minas Gerais
  • Ivar A Mjör University of Florida
Keywords: Dental leakage, dental amalgam, dental restoration failure

Abstract

Purpose: This study evaluated microleakage on amalgam restorations repaired by amalgam and bonded amalgam. Methods: Thirty extracted human pre-molars were restored by amalgam. A simulated defect was prepared and assigned to two treatment groups (n=15): G1 - repaired by amalgam (Permite C-SDI); G2 - repaired by bonded amalgam (Caulk 34% Tooth Conditioner Gel – Dentsply + Prime & Bond 2.1 – Dentsply + Permite C- SDI). The teeth were immersed in a 50% silver nitrate solution, thermocycled and then, sectioned longitudinally through the restoration center and examined by 3 examiners using a stereomicroscope. Microleakage was evaluated in a 0-4 scale for dye penetration. Microleakage data were analyzed by Kruskal Wallis and Dunn test. Results: The bonded amalgam technique was significantly the most effective in repair/tooth interfaces sealing (score 0=53.3%, P=0.0012). For repair/restoration interfaces, conventional amalgam was also statistically more effective in the sealing (score 0=86.7%, P<0.001). Conclusion: None of materials eliminated microleakage completely. The use of adhesive systems had significant effect on the ability to seal the repair/tooth interface, however, for repair/restoration interface, it can increase microleakage.

Author Biographies

Daniela Araújo Veloso Popoff, Universidade Federal de Minas Gerais
Doutoranda em Odontologia pela Universidade Federal de Minas Gerais, Professora da Universidade Estadual de Montes Claros
Fabiana Santos Gonçalves, Universidade Federal de Minas Gerais
Doutora em Odontologia, área de concentração Clínica Odontológica pela Universidade Federal de Minas Gerais
Raquel Conceição Ferreira, Unimontes
Doutora em Odontologia, área de concentração Clínica Odontológica pela Universidade Federal de Minas Gerais. Professora adjunta da Universidade Estadual de Montes Claros
Cláudia Silami Magalhães, Universidade Federal de Minas Gerais
Professora Associada, Departamento de Odontologia Restauradora da Faculdade de Odontologia da Universidade Federal de Minas Gerais
Allyson Nogueira Moreira, Universidade Federal de Minas Gerais
Professora Associada, Departamento de Odontologia Restauradora da Faculdade de Odontologia da Universidade Federal de Minas Gerais
Ivar A Mjör, University of Florida
Professor Emeritus Eminent Scholar, Department of Operative Dentistry, Health Science Center, College of Dentistry
Published
2010-02-21
Section
Original Article