A rapid quantitative in vitro assay measured the effects of antiplaque agents and antiserum on growth and sucrose-mediated adherence of radio-labeled S. mutans 6715. Acid production was measured by change in pH. In this assay the primary effect of chlorhexidine and fluoride was bacteriostasis and inhibition of acid production, respectively; the primary effect of dextran, dextranase, and specific antiserum was inhibition of sucrose-mediated adherence.
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Ciardi et al. (1981) studied this question.
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