Apically extruded debris in curved root canals using a new reciprocating single-file shaping system

Abstract Introduction The present study addresses the influence of five different shaping file systems on apical debris extrusion (AED), using two different irrigation protocols. Methods One hundred and fifty mandibular first permanent molars were divided into two groups and 10 subgroups. Mesial root canals were shaped using One Reci, Wave One Gold Primary and Protaper Next using reciprocating motions, and One Curve and Protaper Next using continuous rotation. The first group and the second one were respectively irrigated with 10 and 5 mL of distilled water. Results When the same instrumentation technique was used G10mL subgroups showed statistically lower AED than G5ML subgroups (P > 0.05). One Reci and One Curve subgroups, in both groups, produced statistically lower AED than the remaining subgroups. Conclusions The cross-section of the instrument could be the main parameter in determining the amount of AED. The irrigation volume used during shaping procedure might affect the amount of AED.