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Lactic acid production by biofilm on resin disks cultured in McBain medium (mean ± sd; n = 6) for P&A control, P&A + NAg, and P&A + DMADDM. The incorporation of NAg or DMADDM greatly decreased the acid production of the adherent biofilms. Values with dissimilar letters are significantly different from each other (p < 0.05).
