Implantation accuracy is not affected by head and angle deviation following computer aided design guide for repair of maxillary posterior tooth defects / 中国组织工程研究

ABSTRACT

BACKGROUND:Maxilary posterior tooth defects can be repaired using the dental implant. However, implantation accuracy is not ensured by traditional plaster models used as implant template, which leads to the incidence of complications,andaffectsthe repair effects. OBJECTIVE:To study application effects of surgical guide plates designed using the computer aided design (CAD)/computer aided manufacturing (CAM) technology for the repair of maxilary posterior tooth defects. METHODS:Implant treatment was performed in 30 patients with maxilary posterior tooth defects. Surgical guide plate was made using the CAD/CAM technology after CT scan of the jaw bone. The repair was conducted with guideplateassistant. The deviation between the virtual and actual implant position was measured after implantation. The clinical repair effects and periodontal tissues were observed during the 12-month folow-up. RESULTS AND CONCLUSION:Thirty-sixCAD/CAM surgical guide plates in 30 patients werestabilized after implantation. Thirty-six implants were emplaced precisely with the assist of the surgical guide plates. There was no any problem during the process of implantation. The deviation of the head between the virtual and actual implant position was very smal, which did not affect the accuracy of implant placement. Before and 6 and 12 months after the repair, gingival crevicular fluid, tumor necrosis factor-α, and sulcus bleeding index were not obviously changed in the patients. Our results suggest that the implant head deviation and angle deviation appearduring the repair process of maxilary posterior tooth defects using CAD/CAM surgical guide for dental implants;however, the implantation accuracy is not affected. The repair effect is ideal and periodontal tissue is in good status after implantation.