In vitro evaluation of the reliability of the Endex electronic apex locator

A new generation of electronic apex locators (Endex) that operates in moistened canals has been developed lately. An experimental comparison of this apparatus with the real, tactile, and radiographic measurements of the root canal length has been conducted. Results show that tactile determination is highly inaccurate and that the Endex is as accurate as radiographic measurements. It also demonstrates that the nonreproducibility of radiographic measurements is statistically significant, whereas that of the Endex is not significant.