Abstract: Objective To evaluate the clinical application and accuracy of a new static guided implant surgery system controlled by an extraoral device. Methods Forty-five patients with a single tooth missing were recruited, and the available bone of all included cases was sufficient. The patients were divided into three groups according to different surgical approaches: group 1, implantation with freehand; group 2, implantation guided by static surgery guide; and group 3, implantation guided via the new implant surgery system controlled by the extraoral device. By comparing the difference between the actual and virtual implant positions among the three groups, the clinical accuracy of the new implant surgery system was evaluated. Patient-reported outcome measurements (PROMS) and the operator related satisfaction were also evaluated. Results No statistical differences were found among groups with regard to the entrance deviation[(1.18±0.48）mm,(1.07±0.47) mm,(0.83±0.37) mm, P>0.05]. The accuracy of the new implant surgery system group at the apical part and for the angle aspect was higher than the other two groups [apical deviation: (1.60±6.76) mm, (1.42±4.40) mm, (1.03±0.54) mm, P<0.05; angle deviation: 5.71º±3.54º,4.63º±2.52º,2.75º±1.90º P<0.05]. For PROMS, there was no statistical difference among groups (P>0.05), and for the operator related satisfaction, the score of the operation visual field availability fluctuates greatly, ranging from 60 to 100. The score of other items was 70 to 90 and 90 to100. Conclusion For single tooth implantation with sufficient available bone, this new static guided system controlled by the extraoral device can achieve predictable clinical accuracy and acceptable patient and operator satisfaction.

Key words: Dental implant, Computer-aided design, Static guided system, Accuracy