DentalImplant Navigation System tries to assist dentiststo do each procedure of the clinical surgery with high accuracy andconvenience. Applying 3D medical image visualization technology and infraredoptical tracking technology, the navigation system achieves the fusion the surgicalinstruments, patient positions and the medical images. Before surgery, thenavigation system is used as the dentist’s planning tool. Dentists can plan andmodify the surgical pathway and select appropriate implants. In the surgeryperiod, the real-time position of the drills and implant can be observed onscreen. Through controlling the drills’ tip position, angle and depth, thedentist can succeed the whole surgery with higher accuracy, shorter implantingcircle and lower clinical risk.