Bulletin of the National Research Centre

Table 3 Mean score for smear layer at the coronal, middle, and apical thirds and overall of the canals

From: Cleaning ability of rotary NiTi systems with different kinematics

System	Coronal	Middle	Apical	Overall
PTN	1.33 ± 0.48^a	1.26 ± 0.45^a	2.20 ± 0.77^a	1.60 ± 0.71^a
WOG	1.33 ± 0.48^a	1.46 ± 0.51^a	3.06 ± 1.03^b	1.95 ± 1.06^a
TF	1.20 ± 0.41^a	1.53 ± 0.51^a	1.93 ± 0.88^a	1.55 ± 0.69^a
P value	0.655ns	0.314ns	0.006*	0.206 ns

Different superscript letters in the same column indicate statistically significance difference; “*” indicates significant (P < 0.05)
ns non significant

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