«EndoEst-3D» — 3 functions within 1 device: 1. Apexlocator (????) — localization of apical constriction of root canal (apex): -Multi-frequency principle of apex localization – guaranteed accuracy of measurements at any mediums; -Digital, graphic, light and sound indication of measurement results; -Additional function of apical shelf formation (determination of «virtual apex»). 2. Electroodontodiagnostics (EOD) – assessment of tooth pulp clinical condition: -3 speeds of «diagnostic current» increasing in dependence of assumed pulp condition of the examined tooth;