Cyclic Fatigue Resistance of Nickel–Titanium Rotary Instruments after Simulated Clinical Use

Table 1

Descriptive statistics analysis of both groups.

Groups	Usage time	N	Mean ± SD	95% confidence interval for mean
				Lower bound	Upper bound
AF F-ONE	New	10	3758.650 ± 1074.677	2989.872	4527.428
	One use	10	1547.700 ± 640.416	1089.574	2005.826
	Two use	10	1653.050 ± 360.143	1395.419	1910.681
	Three use	10	1754.900 ± 293.125	1545.211	1964.589
2Shape	New	10	766.200 ± 119.509	680.708	851.692
	One use	10	714.300 ± 81.147	656.251	772.349
	Two use	10	700.200 ± 89.924	635.872	764.528
	Three use	10	648.900 ± 135.934	551.659	746.141