«EndoEst-Apex 02» professional device for determination of root canal working length (localization of the root canal top). Apexlocator executes localization of apex by measurement of electrical resistance between two electrodes. One of these electrodes is metal hook (lip clip) placed of the patient labia, and the other one (file clip) is connected to metal part of the endodontic instrument (file) inserted into the root canal of the examined tooth. Advantages of the device: -Multi-frequency principle of apex localization guaranteed accuracy of measurements at any mediums; -Large well-read LCD screen; -Digital, graphic, light and sound indication of measurement results; -Automatic activation at instrument inserting into the root canal; -Indication of the canal humidity level ( «dry» or «moist»).