Evaluating In Vitro Performance of a Novel Stainless Steel Rotary System (Gentlefile) Based on Debris Extrusion and Instrumentation Time

Table 2

Mean and standard deviation of time (second) in the studied groups.

Grouping variable		Mean	Std. deviation	95% confidence interval for mean		Minimum	Maximum	value
				Lower bound	Upper bound
ProTaper	22	142.36	18.49	134.17	150.56	173.00	110.00	<.001
Gentlefile	22	166.82	39.90	149.13	184.51	233.00	96.00
Manual	22	232.27	52.83	208.85	255.70	345.00	145.00
Total	66	180.48	54.67	167.045	193.93	345.00	96.00

One-way ANOVA.