Effect of Erbium: Yttrium–Aluminum Garnet Laser, XP-Endo Finisher, and Passive Ultrasonic Irrigation in the Cleaning of Post Spaces on Push-Out Bond Strength

Objective: This study aimed to evaluate the effects of different cleaning protocols on the push-out bond strength of fiber posts.Methods: Sixty mandibular premolars were decoronated. The root segments were prepared to size F3 and obturated with F3 gutta-percha and AH Plus sealer. The post-spaces were prepared with post drills and assigned into four groups according to supplementary cleaning protocols: conventional needle irrigation (CNI), passive ultrasonic irrigation (PUI), XP-endo Finisher, and Erbium: yttrium–aluminum–garnet laser (Er: YAG)- photon-induced photoacoustic streaming (PIPS). Fiber posts were luted with dual-curing self-adhesive resin cement. Each group's cervical, middle, and apical regions were measured with the push test.Results: The data were assessed through one-way analysis of variance (ANOVA) and the Tukey post-hoc test. Push-out strength was statistically different in the XP-endo Finisher, PUI, and Er: YAG laser-PIPS groups compared to the CNI. CNI showed the lowest values.Conclusion: After preparing the post space, irrigation activation methods increase the bond strength values of fiber posts to root dentin compared to CNI. strength between fiber posts and root dentin.