Effect of endodontic irrigating solutions on the adhesive bond strength to dentin

Authors

  • Doglas Cecchin University of Passo Fundo
  • Ana Paula Farina University of Passo Fundo
  • João Vicente Baroni Barbizam University of Seatle
  • Maria Paula Gandolfi Paranhos University of California
  • Bruno Carlini-Júnior University of Passo Fundo

Keywords:

Adhesives, dentin, root canal irrigants

Abstract

Purpose: To evaluate the bond strength of a total-etching adhesive system to dentin irrigated with 1% sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid 17% (EDTA). Methods: Thirty human molars were sectioned 3mm below the oclusal surface and were randomly divided into 3 groups (n = 10): G1, no treatment (control); G2, 1% NaOCl; G3, NaOCl followed by EDTA. The specimens received the total-etching adhesive system, restored with microhybrid composite resin, sectioned and trimmed to create 4 hourglass-shaped slabs of each tooth. The slabs were tested in microtensile bond strength in a universal testing machine (Emic DL 2000) at a crosshead speed of 0.5 mm/min until fracture. The results were analyzed statistically by ANOVA and Newman-Keuls test. G2 samples were not submitted to the test because they fractured just before testing, and its values were considered zero to the statistical analysis. Results: The means and standard deviations (MPa) were: G1, 8.41 (± 3.51); G2, 0.0 (± 0.00); G3, 8.47 (± 3.53). Conclusion: It was concluded that the application of the NaOCl irrigating solution significantly decreased the bond strength values. The use of NaOCl followed by EDTA resulted in bond strength values not statistically different from control group.

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Published

2011-11-15

Issue

Vol. 26 No. 4 (2011)

Section

Original Article

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