Figure 2

SEM images of microcosm biofilms formed on the enamel discs after 7 days according to different treatments. (A,E) Distilled water; (B,F) 50% S-PRG; (C,G) 100% S-PRG; (D,H) 0.1% CHX. Magnification: (A–D) × 10,000; (E–H) × 2,000. Scale bars: 1 μm. (n = 2).