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  • Title: Interactions of zinc with fluoride on growth, glycolysis and survival of Streptococcus mutans GS-5.
    Author: Izaguirre-Fernández EJ, Eisenberg AD, Curzon ME.
    Journal: Caries Res; 1989; 23(1):18-25. PubMed ID: 2920380.
    Abstract:
    Effects of zinc and/or fluoride on growth, glycolysis and survival of Streptococcus mutans GS-5 were examined in vitro. Zinc inhibited growth and glycolysis, and enhanced the antimetabolic activity of fluoride. Zinc alone had little effect on cell survival. During cell growth without pH control a protection from cell death was mediated by fluoride, which appeared to be caused by a higher final pH in the culture medium. When cell death was observed under controlled pH conditions in a lactate-acetate buffer at pH 6.5, 5.0 or 4.0, fluoride was bactericidal only at pH 4.0. However, the combination of zinc plus fluoride was strongly bactericidal at all pH values that were tested.
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