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, 40 extracted mandibular premolars were randomly assigned into 4 groups (n=10) according to the type of sealer applied as follows: group 1: ah-plus, group 2: mta-fillapex, group 3:  sure-seal root, and group 4: 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<0.05.results: there were no significant differences in the push-out bond strength between groups in the coronal third (p>0.05). in the middle third, ah-plus exhibited significantly greater bond strength compared to sure-seal root and zoe sealers (p<0.05), whereas mta-fillapex was not significantly different from the other groups (p>0.05). 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<0.05).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.