TABLE 1. Plaque index (PLI) means and standard deviation on day 0 and day 21 for the control and test groups.

	Control	Test
Day 0	1.61 + 0.45 A,a	1.71 + 0.37 A,a
Day 21	2.56 + 0.71 A,b	2.39 + 0.74 A,b

Means followed by the same uppercase letters on day 0 and day 21 do not differ statistically (p>0.05). Means followed by different lowercase letters in the same column differ statistically (p<0.01).