Fig. 2From: The effect of smear layer removal on E. faecalis leakage and bond strength of four resin-based root canal sealersKaplan Meier cumulative survival curves of samples expressed in number of incubation days resisting the bacterial leakage. Solid line, smear layer left in situ; dotted line, smear layer removed with EDTA. None of the negative control samples leaked in 50 daysBack to article page