Table 2.

P values obtained with the comparison between the groups at the apical, middle, and coronal areas.

Groups	Overall	Coronal	Middle	Apical
Laser Nd:YAG-EDTA	<0.001	<0.001	<0.001	<0.001
Laser Nd:YAG-Maleic acid	<0.001	<0.001	<0.001	<0.001
EDTA-Maleic acid	0.40	0.07	1.00	0.22
Maleic acid-Control	<0.001	<0.001	<0.001	<0.001
EDTA-Control	<0.001	<0.001	<0.001	<0.001
Nd:YAG laser-Control	0.157	0.049	0.096	0.327