Research Article

Evaluation of Alternative Methods to Assess the Biological Properties of Propolis on Metabolic Activity and Biofilm Formation in Streptococcus mutans

Figure 3

Biofilm metabolic activity determined by the MTT method. The effect of polyphenol-rich extract of propolis in S. mutans cultures was quantified in 96-well microplates. The percentage of living biofilm cells was expressed as mean ± standard deviation. CLX, chlorhexidine digluconate 0.2% (positive control), DMSO (vehicle control). from the nonparametric Wilcoxon test when compared to untreated cells.