Figure 1. The absorbance values and CFU numbers (CFU/mL) of bacterial culture when incubated with various monomers. (A–D) In the presence of TEGDMA or DEGDMA, the absorbance values were significantly greater (p < 0.05) than those of controls in the stationary phase (A, S. sobrinus B13; B, S. sanguis ST3R). However, bacterial numbers were not significantly different from controls or less than controls throughout the incubation period (C, S. sobrinus B13; D, S. sanguis ST3R). (E,F) The absorbance values and bacterial numbers of S. sobrinus B13 incubated with the addition of 1.0, 0.5, 0.1, or 0.01 mg/mL of TEGDMA. Significantly greater absorbance values than in controls were obtained at the concentration of 0.5 mg/mL and over, whereas CFU numbers indicated no significant differences between control and all TEGDMA-added groups. The bar represents the standard deviation of the mean of three replicates.