Table 1.

Amount of S. mutans, expressed as the logarithm of the number of colony forming units (CFU) per mL of saliva, measured in saliva samples with dilution of 1 : 10 on days 0 (pretreatment), 90, 180, and 360 in patients treated with chlorhexidine, fluoride, and copaiba varnishes.

	Chlorhexidine	Fluoride	Copaiba	Significance (ANOVA)
	Mean ± SD	Mean ± SD	Mean ± SD
0	0.58 ± 0.43	0.86 ± 0.37	1.32 ± 0.61a,d
90	0.38 ± 0.23	0.51 ± 0.33x	0.99 ± 0.57a,c,y
180	0.33 ± 0.14y	0.41 ± 0.24x	0.39 ± 0.22x,z	P=0.3580
360	0.55 ± 0.52	0.53 ± 0.44x	0.12 ± 0.19b,d,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 letters ^c(P < 0.001) and ^d(P < 0.01) indicate statistically significant differences in relation to the fluoride varnish on the same day (Tukey test). The letters ^x(P < 0.001) and ^y(P < 0.05) designate statistically significant differences in relation to day 0 in the same group, while the letter ^z(P < 0.001) denotes statistically significant difference in relation to day 90 in the same group (Tukey's test).