Aim: The aim of the present study was to compare the accuracy of working endodontic length determination by Dentaport ZX and Ray Pex 4 under clinical conditions.
Material And Methods: Clinical comparative evaluation of the accuracy of two electronic apex locators, Dentaport ZX and Ray-Pex 4, was carried out in 80 single-rooted teeth with vital pulp tissue planned for extraction as part of the dental treatment and after patient consent had been obtained. The normal procedure was followed, which included anesthesia, a standard endodontic access cavity, pulp removal and irrigation of the root canal with 5.