Abstract: Objective To evaluate the accuracy of the digital guide during implant surgery and discuss the clinical promotion value in the field oral implantology. Methods Twenty patients diagnosed with dentition defect were selected in Tianjin Xinaichi Dental Clinic from January 2017 to January 2019. Before surgery, CBCT was taken, CAD/CAM guide plate was prepared, and 65 implants were placed according to the instructions of the guide plate. CBCT examination will be performed immediately after the operation is completed. Through the method of characteristic point measurement, the difference of the implant shoulder, the implant apex and the overall deviation before and after the operation was measured. Use SPSS 21.0 software for analysis. Results The maximum deviation of the implant shoulder between the actual implant position and the designed position was 2.78mm, the minimum was 0.12mm, and the average deviation was (1.45±0.81)mm. The maximum deviation of the implant apex was 2.96mm, the minimum deviation was 0.51mm, and the average deviation was (1.62±0.90)mm. The maximum deviation of implant angle was 7.14°, the minimum deviation was 0.16°, and the average deviation was (3.27±2.47)°. There difference was statistically significant（P<0.05）. The comparative analysis showed that the linear deviation of the implant shoulder guided by the template in the mandibular implant group was significantly lower than that in the maxillary implant group (P<0.05). Conclusions The digital guide has good accuracy, and the accuracy of guided implant surgery in the mandible is higher than that of the upper jaw.

Key words: Dental implant, Digital implant surgical guide, Accuracy