Abstract: Objective To evaluate the effect of different optical tracking systems on the surgical accuracy of the dental implant robot for clinical application. Methods Visible light guidance and infrared light guidance were integrated into the experimental platform of the implant robot. After planning the implant position and path, the robot prepared the implant beds on the modular dentition defect implant models autonomously. 20 implant beds were prepared under each guidance. After the preparation, CBCT scanned the implant models, reconstructed the three-dimensional shape of the implant beds and compared them with the planned implant position to obtain the shoulder deviation, root deviation and angle deviation. An independent sample t-test was performed to analyze the effect of the two optical tracking systems on the accuracy of the dental implant robot. Results The mean and standard deviation of shoulder deviation, root deviation and angle deviation of the preparation guided by infrared light guidance were （0.39±0.14）mm,（0.60±0.19）mm and（2.03±0.84）degrees. The mean and standard deviation of shoulder deviation, root deviation and angle deviation of the preparation guided by visible light guidance were （0.57±0.21） mm,（0.89±0.30）mm and（3.08±1.13）degrees. The results of the independent sample t-test showed that there was a significant difference in the accuracy of implant bed preparation guided by two different principles of optical tracking systems (P<0.05). Conclusion The results of the in vitro model experiments showed that the deviation of the surgical accuracy of the dental implant robot guided by visible light is greater than that guided by infrared light.

Key words: Oral implant, Surgical robot, Accuracy, Model experiment