Table 2 Mean transportation ± standard deviation (in millimeters) of central axis after instrumentation at 10 points from apical constriction in S-shaped root canals

PTU

0.08 ± 0.04^a

0.07 ± 0.05^a

0.16 ± 0.04^b

0.12 ± 0.05^a

0.05 ± 0.06^a

0.17 ± 0.05^a

0.19 ± 0.04^a

0.12 ± 0.05^a

0.05 ± 0.04^a

0.06 ± 0.03^a

WO

0.06 ± 0.04^a

0.06 ± 0.03^a

0.12 ± 0.03^a

0.12 ± 0.05^a

0.05 ± 0.04^a

0.18 ± 0.06^a

0.21 ± 0.06^a

0.13 ± 0.05^a

0.06 ± 0.03^a

0.04 ± 0.04^a

PTN

0.08 ± 0.07^a

0.06 ± 0.04^a

0.12 ± 0.05^a

0.12 ± 0.04^a

0.04 ± 0.03^a

0.15 ± 0.06^a

0.17 ± 0.07^a

0.09 ± 0.06^a

0.06 ± 0.04^a

0.04 ± 0.03^a

P value

>0.05

> 0.05

<0.05

>0.05

>0.05

>0.05

>0.05

>0.05

>0.05

>0.05