Table 1. Salivary mutans streptococci (Log CFU/mL) in 4 groups of subjects at different time intervals (Mean ± SD) (n=20).

Mouthrinses	baseline	5 weeks	10 weeks
control	5.98±0.55	6.12±0.49	5.94±0.72
0.05% NaF	6.03±0.62	5.60±1.55	5.82±1.53
0.05% NaF ± 12.5% xylitol	6.02±0.60	5.34±0.63 a,b	5.39±0.59 a,b
12.5% xylitol	5.87±0.57	5.68±1.06	5.45±0.76 a

a: significant difference from baseline

b: significant difference from data at the same time interval