Fig. 2

Effect of pellicle modification by CPP and fluoride-doped CPP on S. mutans initial adhesion. HA discs were divided into four groups: salivary pellicle-coated HA (negative control), salivary pellicle-coated HA modified by heat-inactivated 2.5% CPP (heat-inactivated CPP), or 2.5% CPP (CPP), or 2.5% CPP supplemented with 900 ppm fluoride (CPP + F). a Representative SEM images (3000-fold magnification) at 30 min and 2 h of incubation. b Colony-forming unit (CFU) counts of S. mutans per disc was calculated according to the plate count method. The results were expressed as the mean ± SD. ^****p < 0.0001