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

Table 1

Kruskal-Wallis test results of the amount of debris extrusion (milligrams) in the study groups.

Grouping variable		Mean rank	Test statistics
			Chi-square	Df	value
ProTaper	22	28.70	2.199	2	0.333
Gentlefile	22	36.98
Manual	22	34.82
Total	66

Significance level is 0.05. Milligrams.