Push-out bond strength of fiber posts to root dentin using glass ionomer and resin modified glass ionomer cements

Authors

  • Jefferson Ricardo PEREIRA University of Southern Santa Catarina
  • Ricardo Abreu da ROSA Federal University of Rio Grande do Sul; Department of Conservative Dentistry
  • Marcus Vinícius Reis SÓ Federal University of Rio Grande do Sul; Department of Conservative Dentistry
  • Daniele AFONSO University of Southern Santa Catarina
  • Milton Carlos KUGA Univ. Estadual Paulista; School of Dentistry; Department of Endodontics
  • Heitor Marques HONÓRIO University of São Paulo; Bauru School of Dentistry; Department of Pediatric Dentistry, Orthodontics and Community Health
  • Accácio Lins do VALLE University of São Paulo; Bauru School of Dentistry; Department of Prosthodontics
  • Hugo Alberto VIDOTTI University of São Paulo; Bauru School of Dentistry; Department of Prosthodontics

DOI:

https://doi.org/10.1590/1678-775720130466

Abstract

OBJECTIVE: The purpose of this study was to assess the push-out bond strength of glass fiber posts to root dentin after cementation with glass ionomer (GICs) and resinmodified glass ionomer cements (RMGICs). MATERIAL AND METHODS: Fifty human maxillary canines were transversally sectioned at 15 mm from the apex. Canals were prepared with a step back technique until the application of a #55 K-file and filled. Post spaces were prepared and specimens were divided into five groups according to the cement used for post cementation: Luting & Lining Cement; Fuji II LC Improved; RelyX Luting; Ketac Cem; and Ionoseal. After cementation of the glass fiber posts, all roots were stored at 100% humidity until testing. For push-out test, 1-mm thick slices were produced. The push-out test was performed in a universal testing machine at a crosshead speed of 0.5 mm/minute and the values (MPa) were analyzed by Kolmogorov-Smirnov and Levene's tests and by two-way ANOVA and Tukey's post hoc test at a significance level of 5%. RESULTS: Fiber posts cemented using Luting & Lining Cement, Fuji II LC Improved, and Ketac Cem presented the highest bond strength to root dentin, followed by RelyX Luting. Ionoseal presented the lowest bond strength values (P>;0.05). The post level did not influence the bond strength of fiber posts to root dentin (P=0.148). The major cause of failure was cohesive at the cement for all GICs and RMGICs. CONCLUSIONS: Except for Ionoseal, all cements provided satisfactory bond strength values.

Downloads

Download data is not yet available.

Downloads

Published

2014-10-01

Issue

Section

Original Articles