Impact of nickel-titanium instrument heat treatment on the precision of an inbuilt electronic apex locator and endodontic motor

Abstract

Numerous nickel-titanium alloys have been designed by manufacturers, however there is little information on the precision of integrated EAL when utilized with various NiTi thermal processes to determine working length.An integrated EAL and endomotor assembly is utilized in this study to assess ex vivo the effects of different thermal processes on NiTi instruments.This study used 20 extracted human maxillary incisors. The visual approach was used to establish the working length (WL) control. WL was measured during cleaning and shaping using rotary files consisting of the Reciproc, Reciproc Blue, Wave One Gold, Twisted File Adaptive, and Hyflex CM systems using 0.25 diameter instrument size.Fisher's exact test and the Kruskal-Wallis statistic tests were used in the analysis of the information at hand.Heat treatment of NiTi rotary instruments has no significant impact on the EAL's accuracy (P > 0.051).The precision of WL estimation using an EAL incorporated with the endomotor was unaffected by the use of thermal processes.