Continuous chelation irrigation improves the adhesion of epoxy resin-based root canal sealer to root dentine.

Autor: Neelakantan P; Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Saveetha University, Chennai, India. prasanna_neelakantan@yahoo.com, Varughese AA, Sharma S, Subbarao CV, Zehnder M, De-Deus G
Jazyk: angličtina
Zdroj: International endodontic journal [Int Endod J] 2012 Dec; Vol. 45 (12), pp. 1097-102. Date of Electronic Publication: 2012 May 21.
DOI: 10.1111/j.1365-2591.2012.02073.x
Abstrakt: Aim: To test the impact of continuous chelation by NaOCl+ etidronic acid (HEBP) during instrumentation, and a final rinse of EDTA or NaOCl + HEBP on the dentine bond strength of an epoxy resin sealer (AH Plus).
Methodology: Single-rooted teeth (n = 100) were divided into five groups (n = 20) based on the irrigation protocol and their root canals instrumented using a rotary Ni-Ti system: 2.5% NaOCl during instrumentation followed by bi-distilled water (G1) or 17% EDTA (G2) as final rinse; 1 : 1 mixture of 5% NaOCl and 18% HEBP during instrumentation, and the same mixture (G3), 17% EDTA (G4) or bi-distilled water (G5) as final rinse. Canals were filled with AH Plus. Roots were sectioned, and push-out tests were performed in coronal, middle and apical root thirds. Results were analysed using analysis of variance (anova) and Bonferroni test for multiple comparisons. The alpha-type error was set at 0.05 for all the analyses.
Results: Push-out bond strength was highest in coronal and lowest in apical root thirds (P < 0.05). Groups that used NaOCl + HEBP irrigation during instrumentation had significantly higher bond strengths than groups following the NaOCl-EDTA irrigation in all root thirds (P < 0.05). The use of a strong chelator as final flush further increased bond strengths (G4, P < 0.05).
Conclusion: The continuous chelation irrigation protocol optimizes the bond strength of an epoxy resin sealer to dentine.
(© 2012 International Endodontic Journal.)
Databáze: MEDLINE
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