Table 1. Volume of remnant filling material.

Groups	Files	Mean Volume Remaining (cm3)	Standard Deviation (cm3)
1	ProTaper Retreatment File	0.012	100±2.52
2	Mtwo Retreatment File	0.011	88.84±1.62
3	H File	0.024	77.09±2.89

K-W ANOVA, H=6.05, P<0.05 Significant