Efficacy of reciprocating and rotary <scp>N</scp>i<scp>T</scp>i instruments for retreatment of curved root canals assessed by micro‐<scp>CT</scp>

Abstract

Remnants of filling material were observed in all samples with no significant differences between the three techniques. Hedström files removed significantly more dentine than ProTaper Universal Retreatment, but no significant differences between both NiTi systems were detected. Procedural errors were observed with ProTaper Universal Retreatment and Reciproc.