A Comparative Evaluation of the Apically Extruded Debris from Root Canals Prepared by R-Motion NiTi File System

Table 2

Mann–Whitney test compares AED between every two groups.

Groups	Number of samples	Mean rank	Sum of ranks	Mann–Whitney U test	P-values
RM (I)	14	11.25	157.50	52.500	0.036
WOG (II)	14	17.75	248.50
RM (I)	14	10.36	145.00	40.000	0.008
PTN (III)	14	18.64	261.00
RM (I)	14	12.89	180.50	75.500	0.300
HFEDM (IV)	14	16.11	225.50
WOG (II)	14	12.68	177.50	72.500	0.240
PTN (III)	14	16.32	228.50
WOG (II)	14	15.89	222.50	78.500	0.369
HFEDM (IV)	14	13.11	183.50
PTN (III)	14	17.07	239.00	62.000	0.098
HFEDM (IV)	14	11.93	167.00

Note. The significant level was set at . Bold values illustrate a significant difference between tested groups.