How Apex Locator Works?

Essentially, electronic apex locators work by using the body to complete an electrical circuit. One side of the apex locator is connected to the oral mucosa (via a lip clip) and the other side to the file.

What does apex locator detect?

An electronic apex locator is an electronic device used in endodontics determine the position of the apical constriction and thus determine the length of the root canal space.

Are apex locators accurate?

Although in the ranges 0.1 and ±0.25 mm the ApexPointer had the highest accuracy, the rank analysis showed that 39% of the measurements were beyond the foramen (Figs 4 and 6). There were no significant differences between the various types of teeth and root canals.