Ex Vivo accuracy of an endodontic motor with an integrated apex locator in multirooted teeth: Research article

Background: Endodontic motors with an integrated electronic apex locator have been tested for its accuracy mostly on single-rooted teeth. Multirooted teeth may create interferences on the readings created by the irrigation solution in the pulp chamber and additional canals. This study aimed to examine in vitro the accuracy of an integrated endodontic motor with an EAL attached in multirooted teeth. Methods: Extracted teeth on a model specially developed to test EALs were tested. The actual working length (WL) was measured with a 5x microscope and K-Files, EAL working length was measured with the pulp chamber flooded with sodium hypochlorite and the measure obtained shaping root canals with the auto apical reverse (AAR) mode, (an endodontic motor that attached to an EAL starts auto-reverse mode when the working length defined