| 摘要 |
A dental hand piece includes a reference line generator attachable to the face of a patient to generate a reference line in parallel to the top surfaces of the teeth of the patient, and a directional guider, for example, laser guider located on the front end of the hand piece body for generating a horizontal light beam for alignment with the reference line and a vertical light beam for indicating the hole-drilling position to help the dentist in drilling a hole perpendicular to the occlusal surface for accurate installation of a fixture to assure a successful dental implantation surgery. |
