Table 1.

Average diameters of bacterial growth inhibition zones (mm) in each group

Groups	Percentage of nanoparticle		Mean±SD	P*
	Ag	CaF2
Group 1	0	5	2.57±0.41	0.778
	0	10	2.42±0.61
	0	15	2.32±43
Group 2	0.5	0	2.27±0.50	0.137
	1	0	2.70±0.88
	1.5	0	3.30±0.48
Group 3	0.5	5	2.20±0.35	0.008
	1	5	2.75±0.50
	1.5	5	3.00±0.41
	0.5	10	2.77±0.75
	1	10	3.30±0.38
	1.5	10	3.40±0.29
	0.5	15	3.45±1.10
	1	15	3.80±0.355
	1.5	15	3.72±0.33

SD: Standrad deviation. *The level of significance was set to 0.05