Table 3. The Inter-group Comparison of Mean Smear Layer Removal at Coronal Third.

		Coronal
		Mean Difference	P Value a
Control Group	Manual Agitation	0.40	0.054
Control Group	EndoActivator	0.87	0.040*
Control Group	X-Pulse tip	1.47	0.001*
Manual Agitation	EndoActivator	0.47	0.048*
Manual Agitation	X-Pulse tip	1.07	0.001*
EndoActivator	X-Pulse tip	0.60	0.045*

^a Mann-Whitney U test; * Significant difference.