Evaluation of antibacterial efficiency of root canal disinfection by using Qmix an irrigating solution in root canal system (an in-vitro study)

Background : The major cause of pulpal and periapical diseases are living non irritants. The irritants include various microorganisms including bacteria, yeast viruses. success of endondotic treatment depends on eradication these prevention reinfection. Mechanical instrumentation alone does not result in microorganism free root canal system, due to complex root anatomy. Thus, irrigants essential ensure microbial minimization elimination of organic tissue remnants. Qmix irrigating solution used as a final rinse after bleach for one step smear layer removal and  disinfection eliminate greater than 99.99% planktonic bacteria the resistant species E.faecalis. Objective: aim this invitro study is evaluate antimicrobial efficacy qmix irrigant infected root system. Material Methods: Crowns 60 extracted premolar teeth were sectioned at cemento-enamel junction. samples stored temporarily physiological saline solution. canals shaped using crown down technique upto F3 protaper file. Enterococcus faecalis was inoculated Brain heart infusion (BHI) agar plate incubated anaerobically 37 ?C 24 h. After incubation, specimens were removed then rinsed. In negative group (n=20), there no treatment. other group (n=20), sections irrigated with 5 mL 5.25% NaOCl s. third (n=20) treated with 60-90 seconds. procedures, subjected CFUcounting evaluations. Results: irrigation, layer positive were significantly superior, compared (p Conclusion: Both groups, especially group, showed satisfactory bactericidal effects experimentally contaminated canals. Keywords: Qmix, E.faecalis.