Objective of this study was to assess the antibacterial effects of apple cider vinegar, black tea and sodium hypochlorite irrigant solutions on infected root canals microorganisms of primary teeth. Subjects and methods: This study was carried out on Sixty nine extracted primary molars. Crown was rebuilt up after caries removal and root canals were standardized mechanically prepared .Molars were packed and sterilized in autoclave, then inoculated with E fecalis. Molars were randomly divided into four equal groups. , Group A: sixteen molars were irrigated with apple cider vinegar as an irrigant solution. Group B: sixteen molars were irrigated with black tea as an irrigant solution. Group C: sixteen molars were irrigated with sodium hypochlorite as an irrigant solution. Group D: sixteen molars were irrigated with normal saline as an irrigant solution. Microbiological evaluation was based on taking microbial sample by paper point from root canal before, immediate after and forty eight hour after irrigation. Results: apple cider vinegar and black tea showed acceptable antibacterial effects against E. faecalis after immediate irrigation with non significant difference. After forty eight hour black tea had significant decrees in antibacterial activity. Conclusion: Apple cider vinegar and Black tea could be used as irrigant solution.
Keywords: Apple cider vinegar, Black tea, sodium hypochlorite, E fecalis.