Table 2: Comparison of intragroup change in inhibition zone from day 1 to 7 and then at day 14

Materials		Comparison		Mean difference		“t”-value		p-value
Group A		Day 1 vs day 7		2.30 ± 0.68		10.776		<0.001*
		Day 1 vs day 14		5.30 ± 1.06		15.821		<0.001*
		Day 7 vs day 14		3.00 ± 0.67		14.230		<0.001*
Group B		Day 1vs day 7		1.90 ± 0.74		8.143		<0.001*
		Day 1 vs day 14		5.00 ± 1.25		12.677		<0.001*
		Day 7 vs day 14		3.10 ± 0.99		9.858		<0.001*
Group C		Day 1 vs day 7		4.00 ± 0.67		18.974		<0.001*
		Day 1 vs day 14		4.00 ± 0.67		18.974		<0.001*
		Day 7 vs day 14		–		–		–
Group D		Day 1 vs day 7		2.60 ± 0.52		15.922		<0.001*
		Day 1 vs day 14		2.60 ± 0.52		15.922		<0.001*
		Day 7 vs day 14		–		–		–

*Highly significant (p < 0.001)