Table 3. Comparison of mean defect depth between different time intervals in the control and test sites using Friedman’s test followed by Wilcoxon signed rank post-hoc analysis.

Site	Time	N	Mean	SD	P-Valuea	Sig. Diff	P-Valueb
Control	Baseline	17	67.63	25.64	0.001*	BL vs 3M	<0.001*
	3 Months	17	56.57	24.54		BL vs 6M	<0.001*
	6 Months	17	39,5	20.43		3M vs 6M	<0.001*
Test	Baseline	17	78.53	38.76	<0.001*	BL vs 3M	<0.001*
	3 Months	17	45.93	23.53		BL vs 6M	<0.001*
	6 Months	17	28.17	15.76		3M vs 6M	<0.001*

*- Statistically Significant