Anti-plaque effect of a synergistic combination of green tea and Salvadora persica L. against primary colonizers of dental plaque

Abdulbaqi, H.R. and Himratul-Aznita, W.H. and Baharuddin, N.A. (2016) Anti-plaque effect of a synergistic combination of green tea and Salvadora persica L. against primary colonizers of dental plaque. Archives of Oral Biology, 70. pp. 117-124. ISSN 0003-9969, DOI

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Objective Green tea (Gt), leafs of Camellia sinensis var. assamica, is widely consumed as healthy beverage since thousands of years in Asian countries. Chewing sticks (miswak) of Salvadora persica L. (Sp) are traditionally used as natural brush to ensure oral health in developing countries. Both Gt and Sp extracts were reported to have anti-bacterial activity against many dental plaque bacteria. However, their combination has never been tested to have anti-bacterial and anti-adherence effect against primary dental plaque colonizers, playing an initial role in the dental plaque development, which was investigated in this study. Methods Two-fold serial micro-dilution method was used to measure minimal inhibitory concentration (MIC) of aqueous extracts of Gt, Sp and their combinations. Adsorption to hexadecane was used to determine the cell surface hydrophobicity (CSH) of bacterial cells. Glass beads were used to mimic the hard tissue surfaces, and were coated with saliva to develop experimental pellicles for the adhesion of the primary colonizing bacteria. Results Gt aqueous extracts exhibited better anti-plaque effect than Sp aqueous extracts. Their combination, equivalent to 1/4 and 1/2 of MIC values of Gt and Sp extracts respectively, showed synergistic anti-plaque properties with fractional inhibitory concentration (FIC) equal to 0.75. This combination was found to significantly reduce CSH (p < 0.05) and lower the adherence ability (p < 0.003) towards experimental pellicles. Conclusion Combination between Gt and Sp aqueous extracts exhibited synergistic anti-plaque activity, and could be used as a useful active agent to produce oral health care products.

Item Type: Article
Funders: Post Graduated Research grant (PPP)—Research, project account number PG012-2014A, of University of Malaya
Uncontrolled Keywords: Salvadora; Tea; Dental plaque; Anti-bacterial agents; Anti-adherence; Synergism
Subjects: R Medicine > RK Dentistry
Divisions: Faculty of Dentistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 12 Oct 2017 03:22
Last Modified: 12 Oct 2017 03:22

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