Mouthwashes: An in vitro study of their action on microbial biofilms and cytotoxicity to gingival fibroblasts

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2018-03-01

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De Oliveira, Jonatas Rafael [UNESP]
Belato, Kely Karina [UNESP]
De Oliveira, Felipe Eduardo [UNESP]
Jorge, Antonio Olavo Cardoso [UNESP]
Camargo, Samira Esteves Afonso [UNESP]
De Oliveira, Luciane Dias [UNESP]

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This study evaluated the in vitro antibiofilm effect of 5 different commercial mouthwashes (Cepacol Traditional, Colgate Plax Fresh Mint, Listerine Cool Mint, Oral-B Complete, and Sensodyne) on Candida albicans, Staphylococcus aureus, Enterococcus faecalis, Streptococcus mutans, Escherichia coli, and Pseudomonas aeruginosa. The cytotoxic effect of the mouthwashes on gingival fibroblasts was also analyzed. A colorimetric assay with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) was used to investigate the viability of biofilms after 48 hours and gingival fibroblasts after 24 hours. The biofilms were exposed to the mouthwashes for 2 different lengths of time: T1, the time recommended by the manufacturer (30 or 60 seconds); and T2, double the recommended time (60 or 120 seconds). All antiseptic mouthwashes caused a significant reduction of biofilm (P < 0.05) as well as a significant reduction of viable gingival fibroblasts (P < 0.05) with both exposure times (T1 and T2). It can be concluded that the commercial mouthwashes demonstrated effective antibiofilm activity; they were more effective on bacteria than on C albicans. A significant cytotoxic effect on gingival fibroblasts was also observed.

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General Dentistry, v. 66, n. 2, p. 28-34, 2018.