In Vitro evaluation of irrigation activation techniques on bond strength of Bioceramic sealer after AgNp-based intracanal medicament removal

Abstract Objective: The study aimed to determine the pushout bond strength (PBS) of bioceramic root canal sealer after removal of silver nanoparticle (AgNP) based calcium hydroxide paste using different irrigation activation techniques. Materials and Methods: To remove the intracanal medicament, 60 single-rooted mandibular premolars were separated into four groups based on the irrigation activation used: ultrasonic irrigation (UI), laser-activated irrigation, manual dynamic activation (MDA), and conventional syringe irrigation. Obturation was done with bioceramic root canal sealer and single-c cone. After 1 week, PBS testing was done. Statistical analysis was done by ANOVA followed by post hoc Tukey test. Results: The highest bond strength among the tested groups was shown by UI. Post hoc tests revealed significantly higher PBS values for UI ( P = 0.001), closely followed by MDA ( P < 0.05). Conclusions: When compared with other irrigation activation methods, higher PBS values for bioceramic sealer were obtained when UI was used for removal of AgNP based calcium hydroxide intracanal medicament.