Effect of 0.2% Chitosan Associated with Different Final Irrigant Protocols on the Fiber Post Bond Strength to Root Canal Dentin of Bovine Teeth: An In-vitro Study

Objective: This in-vitro study investigated the effect of 0.2% Chitosan associated with different final irrigant protocols on bond strength fiber posts (FP) to root canal dentin. Methods: Fifty bovine incisors roots were prepared using ProTaper Universal system, irrigated 2.5% sodium hypochlorite, and divided into one control group (n=10) no protocol four experimental groups (n=10), which defined according combination chelating solution (17% EDTA Chitosan) activation/delivery method [conventional irrigation (CI), passive ultrasonic (PUI)]. Post spaces a depth 12 mm #1-5 Largo drills, FP cemented self-adhesive resin cement. Two slices 2 in thickness from each third obtained submitted micropush-out test. After testing push-out strength, analyzed under stereomicroscope at 40× magnification for failure patterns determination. Statistical analysis was performed three-way ANOVA followed by Tukey’s test (? = 0.05). Results: The 17% + CI exhibited significantly lower than CI, PUI, PUI cervical (P 0.00). had higher values middle apical thirds 0.00), Adhesive cement-dentin type predominant all groups. Conclusion: use chitosan did not affect Passive activation solutions resulted an improvement bonding strength.