Radiolucent apex: is the end of the root
Anatomical apex: the end of the root canal.
The distance between the radiolucent apex and the anatomical apex can be up to 3 mm.
The function of the apex locator is to determine the position of the anatomical apex.
Therefore, if there is a discrepancy between the WL and the radiographic apex ......
Always trust your acoustic apex localizer ....