Table 1. Comparison of penetration depth (µm) of 2% chlorhexidine into root dentinal tubules.

Group	Coronal level	Middle level	Apical level	p value
Group 1	132.16 (113.16 - 152.05)	77.07 (75.30 - 79.53)	44.69 (39.0 - 48.4)	<0.001
Group 2	217.84 (185.24 - 246.56)	142.01 (118.65 - 151.29)	67.06 (63.88 - 74.69)	<0.001
p value	<0.01	<0.001	<0.001

The numbers in the parentheses were the first and third quartile values.