Table 1.

Analytical statistics in different groups and their areas.

Groups	Areas	Mean score	Standard deviation	Mean score (total)	P value
Nd:YAG laser	Coronal	6.10	2.37	7.05	0.00
	Middle	7.30	1.06
	Apical	7.76	0.45
17% EDTA	Coronal	1.20	0.43	1.33	0.00
	Middle	1.14	0.30
	Apical	1.66	1.02
5% Maleic acid	Coronal	1.06	0.21	1.62	0.00
	Middle	1.14	0.30
	Apical	2.66	2.01
Control	Coronal	8.00	0.00	7.86	0.05
	Middle	8.00	0.00
	Apical	7.60	0.41