Abstract
Purpose
Black extrinsic discoloration is a common clinical and aesthetic problem. This study aims to evaluate the potential in vitro antagonistic activity of two commercial probiotics, Streptococcus salivarius M18 and Lactobacillus reuteri ProDentis, against microorganisms associated with black stains.
Methods
Streptococcus salivarius M18 and Lactobacillus reuteri were tested against Aggregatibacter actinomycetemcomitans and Actinomyces naeslundiiusing their cell-free fermentative broth in a planktonic growth inhibition test.
Results
Both probiotic cell-free supernatants showed the ability to reduce the pathogenic bacteria growth in a dose-dependent way. Streptococcus salivarius M18 showed a stronger antimicrobial activity than Lactobacillus reuteri ProDentis against the two indicator strains used. A. naeslundi was less susceptible to the probiotic activity of both S. salivarius and L. reuteri compared to A. actinomycetemcomitans.
Conclusions
The obtained results demonstrate a potent antagonistic ability of probiotics to reduce the growth of microorganisms associated with black tooth stains. Therefore, these strains could be evaluated for a therapeutic use against dental pigmentations.
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Acknowledgements
The Authors are grateful to Dr Veronica Cappa for the statistical support.
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Gobbi, E., De Francesco, M.A., Piccinelli, G. et al. In vitro inhibitory effect of two commercial probiotics on chromogenic actinomycetes. Eur Arch Paediatr Dent 21, 673–677 (2020). https://doi.org/10.1007/s40368-020-00512-2
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DOI: https://doi.org/10.1007/s40368-020-00512-2