title: Microorganisms growth in endodontic citric-acid solutions with and without microbiological stabilizer.
abstract: The purpose of this study was to determine if citric-acid solutions for endodontic use can become contaminated and if the addition of a microbiological stabilizer to the acid would modify this situation. Five types of microorganisms were inoculated in tubes containing 10% citric-acid solutions, pH 1.8 (group A1), and 10% solution, pH 1.8, combined with 0.1% sodium benzoate (group A2). The results demonstrated that solutions of group A1 were contaminated with Candida albicans in 100% of the tubes, Escherichia coli in 80%, and Enterococcus faecalis in 50%. When stabilizer was added (group A2), C. albicans grew in only 30% of tubes and all bacterial species were neutralized.
authors.affiliation: Centro de Estudos Odontológicos, Penedo/RJ, Brazil.
authors.forename: Leonardo dos Santos
authors.initials: Ldos S
authors.lastname: Barroso
authors.forename: Sandra Márcia
authors.initials: SM
authors.lastname: Habitante
authors.forename: Antonio Olavo Cardoso
authors.initials: AO
authors.lastname: Jorge
authors.forename: Ivan da Silva
authors.initials: Ida S
authors.lastname: Faria
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology*; D001412:Bacillus subtilis / Q000187:drug effects / Q000254:growth & development; D002176:Candida albicans / Q000187:drug effects / Q000254:growth & development; D019343:Citric Acid / Q000737:chemistry / Q000494:pharmacology*; D015169:Colony Count, Microbial; D004340:Drug Contamination / Q000517:prevention & control*; D013293:Enterococcus faecalis / Q000187:drug effects / Q000254:growth & development; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011310:Preservatives, Pharmaceutical / Q000737:chemistry / Q000494:pharmacology*; D012388:Root Canal Irrigants / Q000737:chemistry / Q000494:pharmacology*; D020160:Sodium Benzoate / Q000737:chemistry / Q000494:pharmacology*; D013295:Streptococcus mutans / Q000187:drug effects / Q000254:growth & development
chemical_list: D000890:Anti-Infective Agents; D011310:Preservatives, Pharmaceutical; D012388:Root Canal Irrigants; D019343:Citric Acid; D020160:Sodium Benzoate