Objective: The purpose of this study was to evaluate the efficacy of three different newer irrigation delivery techniques; namely endovac system, stropko irrigator and lasers with 2% chlorhexidine.

Methods: Forty teeth after disinfection by OSHA regulations were instrumented and inoculated with bacterial strains of E.faecalis. The teeth were divided into four groups and the irrigants were delivered with the Endovac, stropko irrigator and laser irradiation. One group served as the control and received no irrigation. The samples were incubated in Muller Hilton media plates and incubated for 24 hours. The colony forming units were determined and statistically analysed using the chi square test.

Results & Conclusion: According to the results obtained, laser group resulted in significantly higher antimicrobial effects compared with the endovac and stropko irrigation groups when in conjunction with chlorhexidine.

Keywords: Disinfection, Endovac, Irrigation, Lasers, Stropko Irrigator