Table 2.

Amount of Streptococcus mutans, expressed as the logarithm of the number of CFU per mL of saliva, measured in saliva samples with dilution of 1 : 100 on days 0 (pretreatment), 90, 180, and 360 in patients treated with chlorhexidine, fluoride, and copaiba varnishes.

Day	Chlorhexidine	Fluoride	Copaiba	Significance (ANOVA)
	Mean ± SD	Mean ± SD	Mean ± SD
0	0.45 ± 0.26	0.48 ± 0.20	0.89 ± 0.55a.c
90	0.33 ± 0.13	0.36 ± 0.11	0.66 ± 0.44a.c
180	0.30 ± 0.00v	0.34 ± 0.07w	0.38 ± 0.19u.y	P=0.0723
360	0.31 ± 0.18w	0.40 ± 0.28	0.10 ± 0.19b.c.u.x.z
Significance (repeated measures ANOVA)				—

SD, standard deviation; ANOVA, analysis of variance. The letters ^a(P < 0.001) and ^b(P < 0.01) denote statistically significant differences in relation to the chlorhexidine varnish on the same day, while the letter ^c(P < 0.001) indicates statistically significant difference in relation to the fluoride varnish on the same day (Tukey test). The letters ^u(P < 0.001), ^v(P < 0.01), and ^w(P < 0.05) designate statistically significant differences in relation to day 0 in the same group; the letters ^x(P < 0.001) and ^y(P < 0.05) denote statistically significant differences in relation to day 90 in the same group, while the letter ^z(P < 0.05) indicates statistically significant difference in relation to day 180 in the same group (Tukey test).