Table 1.

The number of S. mutans and E. coli colonies recovered and the antibacterial rate of each group.

Additive amount (wt, %)	Colony count (×104CFU/ml,`X ± S)		Antibacterial rate (R,%)
	S. mutans	E. coli	S. mutans	E. coli
0	216.70 ± 10.50	610.30 ± 16.26	–	–
0.5	100.70 ± 6.50	417.30 ± 16.50	53.53	31.62
1.0	71.33 ± 2.51	304.30 ± 12.58	67.08	50.14
1.5	36.33 ± 2.51	219.70 ± 8.15	83.23	64.00
2.0	14.33 ± 2.08	152.00 ± 9.00	93.38	75.09
2.5	9.00 ± 2.00	83.67 ± 6.11	95.85	86.30
3.0	4.33 ± 1.52	42.67 ± 4.04	98.00	92.98