Table 2. Values of plaque index at baseline and one month follow up in all five categories.

Experimental group	Category I	Category II	Category III	Category IV	Category V	p-value
Baseline	2.42±0.23	2.38±0.31	2.42±0.21	2.38±0.34	2.51±0.07	0.11
1 month	1.10±0.10	1.06±0.12	1.12±0.10	1.07±0.12	1.31±0.14	<0.05
Intra-group variation	<0.05	<0.05	<0.05	<0.05	<0.05