Table 3. Number of rotations to fracture and lengths of fracture segments for each NiTi file type before and after autoclaving.

NiTi files	Sterilization cycles	Rotations to failure		Length of fractured segments
		Mean rank	p- value	Mean rank	p- value
EdgeTaper Platinum	0	2.00a	0.010*	3.17a	0.030*
		1		12.60b			13.20b
		5		7.00			7.00
	10	13.40b		12.10b
ProTaper Gold	0	11.50	0.742	9.17	0.726
		1		9.00			7.50
		5		7.70			11.30
	10	10.60		9.90
TruNatomy Prime	0	8.33	0.239	13.33	0.723
		1		8.40			11.70
		5		11.80			6.90
	10	9.00		13.33

Notes.

^a,bDifferent letters indicate the presence of significant differences.

^*Level of significance set at p < 0.05.