Survival Analysis of Factors Influencing Cyclic Fatigue of Nickel-Titanium Endodontic Instruments

Table 1

Numbers of four Ni-Ti rotary instruments of the size specified by ISO standards (yellow for size 20, red for size 25) tested for the canal of 3 mm and of 5 mm radius of curvature.

Radius	System	Number	ISO colour (yellow/red)
3 mm	Mtwo	18	9/9
	Wizard Navigator	20	10/10
	Revo-S	17	7/10
	ProTaper	18	9/9
5 mm	Mtwo	16	8/8
	Wizard Navigator	20	10/10
	Revo-S	16	8/8
	ProTaper	17	8/9