Comparison between syringe irrigation and RinsEndo in reduction of Enterococcus faecalis in experimentally infected root canal

To ensure root canal treatment success، endodontic microbiota should be efficiently reduced. Several irrigation devices have been recently introduced with the main objective of improving root canal disinfection. The purpose of this study was to evaluate the rinsing effect of RinsEndo system in reduction of enterococcus faecalis in comparison with conventional hand syringe in infected root canals. 60 extracted single canal anterior teeth were infected with enterococcus faecalis and divided into 3 groups: RinsEndo system، conventional hand syringe and control group. The enterococcus faecalis colonies were counted in each group before and after rinsing. Data were analyzed using Variance and Kruskal Wallis test. The mean of enterococcus faecalis growth after rinsing was 3. 50×103 in group with conventional syring rinsing، 2. 04×103 in group with RinsEndo washing and 6. 11×103 in control group. Reduction of enterococcus faecalis after rinsing was statistically significant in each group (P<0. 001). The amount of reduction in number of colonies with RinsEndo and conventional syringe rinsing was higher in comparison with control group and this difference was significant (P<0. 001). RinsEndo rinsing effect was statistically significantly higher in comparison to conventional syringe as well (P<0. 001). Rinsing with RinsEndo system was significantly more efficient in reduction of enterococcus faecalis from root canal in comparison with hand syringe washing.