Push-out bond strength of a new bioceramic-based root canal sealer

Objective: The present study aimed to evaluate the bond strength of Sure-Seal Root as a new bioceramic-based sealer, and compare it with other sealers, including an epoxy resin-based sealer (AH-Plus), zinc oxide eugenol (ZOE) and a mineral trioxide aggregate-based sealer (MTA Fillapex).Methods: In this in vitro study, ۴۰ extracted mandibular premolars were randomly assigned into ۴ groups (n=۱۰) according to the type of sealer applied as follows: Group ۱: AH-Plus, Group ۲: MTA-Fillapex, Group ۳:  Sure-Seal Root, and Group ۴: ZOE. The canals were prepared and obturated with gutta-percha and the corresponding sealer. The samples were sectioned into horizontal segments, and the push-out bond strength was determined using a universal testing machine at the coronal, middle, and apical root thirds. The data were analyzed by repeated measures ANOVA, and the significance level was set at P<۰.۰۵.Results: There were no significant differences in the push-out bond strength between groups in the coronal third (P>۰.۰۵). In the middle third, AH-Plus exhibited significantly greater bond strength compared to Sure-Seal Root and ZOE sealers (P<۰.۰۵), whereas MTA-Fillapex was not significantly different from the other groups (P>۰.۰۵). In the apical third, both AH-Plus and MTA-Fillapex showed significantly greater push-out bond strength than Sure-Seal Root and ZOE sealers (P<۰.۰۵).Conclusions: AH-Plus sealer exhibited the highest and ZOE showed the lowest bond strength. Sure-Seal Root indicated promising bond strength results when compared to ZOE and MTA-Fillapex. The push-out bond strength of all sealers to dentin increased from the coronal to the apical third.

کلیدواژه ها:

Bioceramic ، Bond Strength ، Gutta-percha ، mineral trioxide aggregate ، root canal obturation ، Root Canal Sealer