Effect of working length measurement by electronic apex locator or radiography on the adequacy of final working length: a randomized clinical trial

摘要

Introduction: Obtaining a correct working length is critical tothe success of endodontic therapy.The aim of this clinical study was to compare the effect ofworking length determination using electronic apex locatoror working length radiograph on the length adequacy of finalworking length as well as the final obturation.Methods: A total of 84 patients with 188 canals were randomized into two groups; in group 1, the working length wasdetermined by working length radiograph, whereas in group2 it was determined by the Raypex5 electronic apex locator(VDW, Munich, Germany).