Comparison of the Antimicrobial Effect of Chlorine Dioxide, Sodium Hypochlorite and Chlorhexidine, on Bacteria Isolated from the Root Canal

Aim: To compare the antimicrobial capacity of Chlorine Dioxide (ClO2), Sodium Hypochlorite (NaOCl) and Chlorhexidine (CHX) in microorganisms isolated from persistent apical periodontitis ATCC strains. Materials methods: The included were analyzed by Minimum Inhibitory Concentration (MIC): 50 µl saline solution 100 0.25%, 1% 2% used to make following dilutions 1:2, 1:4, 1:8, 1:16, 1:32, 1:64, 1:128, 1:256, 1:512, 1:1024 test them with microorganisms, E. faecalis root canal S. viridans, anginosus group alveolus, adittion, Escherichia coli Staphylococcus aureus observe bacterial growth after 18h incubation. Results: NaOCl inhibited all dilutions, ClO2 showed dilution CHX1:8, faecalis, group, ClO2:1:32, CHX:1:8, CHX:1:128, ClO2:1:64 CHX:1:256. Conclusion: was chemical agent that strains evaluated, followed needed higher concentrations for eradication