Abstract: The invention is a system and method for guiding a dental treatment tool. The system comprises a guidance device inserted into the mouth and an analyzer unit receiving tool location information from the device and providing an image indicating the location of the tool in relation to the jaw. The guidance device provides a platform to which any type of dental tool can be attached and supports the tool, allowing it to be moved in any direction. The system tracks the motion of the tool and displays its location and orientation relative to a three dimensional coordinate system whose origin is located on part of the device. Prior to the procedure the practitioner designs a surgery or treatment path, which is displayed on top of an image of a region in the mouth. An image of the tool showing its instantaneous location and orientation is displayed as an overlay.