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Published on: December 20, 2024
Effect of exposure to root canal irrigants on the push-out bond strength of calcium silicate-based cements
Elena Rebolloso de Barrio1, Lucía Gancedo-Caravia2, Ernesto García-Barbero1
1Departamento de Odontología Conservadora y Prótesis Bucofacial, Facultad de Odontología, Universidad Complutense de Madrid, Pza. Ramón y Cajal, s/n. Ciudad Universitaria, 28040, Madrid, Spain.
Objectives:
The aim of this study was to compare the push-out bond strength (POBS) of three calcium silicate-based cements (CSBC) after exposure to saline, sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), and a mixture of NaOCl and etidronic acid (NaOCl+HEBP) in simulated perforation.
Materials And Methods:
A total of 180 dentin slices were perforated and then filled with either Biodentine (BD), ProRoot MTA (PMTA), or Total Fill (TF). After 1 week, specimens in each group were divided into 4 subgroups (n = 15) according to the root canal irrigant (RCI) that their coronal surface was exposed to: saline, 5.25% NaOCl, 17% EDTA, or a mixture of 5.25% NaOCl and 9% HEBP (NaOCl+HEBP). A push-out test was performed, and the failure pattern was assessed. POBS data were analyzed with ANOVA and Tukey post hoc tests and the failure patterns with chi-square test.
Results:
No differences were found when comparing the effect of RCI on the POBS of PMTA. BD showed significantly higher POBS values after exposure to NaOCl+HEBP (p < .05), and those of TF were significantly lower after exposure to EDTA (p < .05). No differences in the failure patterns were found among groups.
Conclusion:
NaOCl+HEBP had no detrimental effect on the POBS of CSBC.
Clinical Relevance:
The mixture of sodium hypochlorite and etidronic acid may be considered as an alternative irrigant when treating root perforations.
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