Digital assistance system for working-length determination during root canal preparation. Motor guides the user safely through the root canal and supports the mechanical and chemical preparation steps. Integrated apex locator measures length without interruption. Distinctive software to control the file movement, which can detect the performance of the file and notify when a file change is recommended by releasing a special acoustic signal sound. Automated irrigation recommendation for a successful treatment. Perfectly matched to the HyFlex and MicroMega NiTi file systems, and flexible use due to Doctor's Choice function. Set includes Control Unit, Motor with Apex Measuring Contact, Bluetooth Foot Switch, Power Supply, Apex Cable Set, and Holding Bracket for Apex Cable.