Figure 2. SEM photographs of S. sobrinus B13 or S. sanguis ST3R after 18 hrs of incubation with 1.0 mg/mL of TEGDMA or without any monomers. (A) S. sobrinus B13 incubated without monomers. (B) S. sobrinus B13 incubated with TEGDMA. (C) S. sanguis ST3R incubated without monomers. (D) S. sanguis ST3R incubated with TEDGMA. Sparse vesicular material was formed around bacterial cells when incubated with TEGDMA (x7500).