An in-vitro evaluation of effect of EDTAC on root dentin with respect to time.

Background: The present study was devised to evaluate the effects of 17% EDTAC on smear layer removal and on the dentin structure after irrigation with 1 minute and 10 minutes.

Materials & Methods: One hundred extracted mandibular molars with two separate mesial canals were selected; mesiobuccal canal was instrumented to size 30 file with crown down technique. One half of each root (either mesial or distal) was randomly selected and prepared for scanning electron microscopic (SEM) evaluation that was then cut longitudinally into two equal segments.