Abstract: Objective: To investigate the application effect of 3D printing guide plate technology in the implantation of patients with dentition defect and its influence on postoperative accuracy. Methods: A total of 98 patients(98 teeth) in our hospital from June 2018 to May 2019 were randomly divided into conventional group(n=49 cases, 49 pieces) and 3D group(n=49 cases, 49 pieces). The patients of conventional group were implanted with the aid of traditional implant guide plate, and the patients of 3D group were implanted with 3D printing guide technology. The accuracy and satisfaction of the two groups were compared. After 12 months of follow-up, the probing depth, implant success rate and bone resorption were compared between the two groups. Results: The deviation values of buccolingual, mesial, distal and vertical directions of implant tip and neck in 3D group were significantly less than those in conventional group(P<0.05). The buccolingual, proximal and distal deviation values of implant in 3D group were significantly lower than those in conventional group(P<0.05), while the satisfaction of 3D group was significantly higher than that of conventional group(P<0.05). There was no significant difference in probing depth and bone resorption between 3D group and conventional group(P>0.05). There were no significant difference in the success rate of implantation between the two groups at 3 months and 6 months after operation(P>0.05), but the implantation success rate after 9 months and 12 months of follow-up in 3D group were significantly higher than that in conventional group(P<0.05). Conclusion: 3D printing guide plate technology helps to reduce the error of restoration angle and position of patients with dentition defect, and ensure the accuracy of dental implant.

Key words: 3D printing guide plate technology, dentition defect, implant, postoperative accuracy, satisfaction