A COMPARATIVE STUDY ON THE DETERMINATION OF WORKING LENGTH IN SINGLE-ROOTED TEETH USING ELECTRONIC APEX LOCATORS

Aim of the study This study aims to evaluate the accuracy of an electronic apex locator (Apex Finder) in determining the working length of root canals in extracted monoradicular teeth. By comparing electronic and manual measurement methods across four experimental groups, the study assesses the clinical reliability and consistency of electronic apex locators. Materials and methods A total of 40 single-rooted permanent teeth, extracted for orthodontic reasons, were included in the study. After access cavity preparation and mounting in alginate-supported conformers, working length was determined using manual (Kerr files) and electronic (Apex Finder) techniques. Measurements were verified radiographically. The teeth were divided into four groups based on the scale readings of the Apex Finder: 00, 03, 05, and 07. Results The Apex Finder showed a high degree of accuracy, with results coinciding with manual measurements in 90% to 100% of cases. Group III exhibited the highest accuracy, with complete alignment between electronic and manual readings. Minor deviations occurred in the other groups but remained within clinically acceptable limits. Conclusions The study demonstrates that electronic apex locators like the Apex Finder can be effective tools for determining root canal working length. Their accuracy, particularly when used in conjunction with manual techniques, supports their integration into routine endodontic practice, reducing dependence on radiographic methods and enhancing procedural efficiency.