The present invention is directed to a bite tray having fiducial markers for head scan registration and method of use. The bite tray is held by a patient in his teeth while the scan of his head and the fiducial markers is made by x-ray, CT, or MM and the scan is entered into a computer to register the scan to the fiducial markers. Instrument optical markers are placed on a dental instrument and it is observed by a camera and the observation is entered into the computer to register the instrument optical markers to the dental instrument. Patient optical markers are placed on the patient and it is observed by the camera and the observation is entered into the computer to register the patient optical markers to the patient. The tip of the dental instrument is then touched to one of the fiducial markers making the location of the tip and the fiducial marker the same. The computer then registers the scan to the instrument and the patient. The bite tray is then removed from the mouth allowing access by the dentist to the teeth. The camera follows the movement of the instrument optical markers to the patient optical markers to create a display of the instrument and tip on the scan.
