Table 1.

The mean of diameters of inhibition zones of chitosan and nanochitosan against four oral streptococci

concentration mg/ml	Zone of inhibition (mm)
	Streptococcus salivarius		Streptococcus sanguis		Streptococcus sobrinus		Streptococcus mutans
	chitosan	nanochitosan	chitosan	nanochitosan	chitosan	nanochitosan	chitosan	nanochitosan
5	12.167	14.5	13.5	15.67	12	14	12.5	15.16
2.5	10.167	11.8	10.5	12.25	10	12	10.5	12
1.25	9	10.67	8.5	10.5	8.5	9.5	8.5	10