The present invention relates to ultrasonic dental tools having an insert that includes monitoring mechanism(s) for usage, performance and indication mechanism(s) for replacement. The dental tool includes a dental insert having a transducer for generating ultrasonic vibrations. The ultrasonic dental insert includes a housing and a connecting body having a proximal end and a distal end having a tip attached thereto. The proximal end is attached to the transducer so as to generate the ultrasonic vibrations therefrom and to transmit the ultrasonic vibrations toward the tip attached to the distal end. In one aspect, the ultrasonic dental tool includes monitoring systems for tool usage and condition. The dental tool may include, for example, usage time monitoring circuitry, wear usage circuitry, electromagnetic monitoring circuitry and/or any other appropriate monitoring systems.