Abstract: Objective: To investigate the clinical effect of digital impression in the restoration of fixed denture with full arch implantation. Methods: We obtained the digital impression in patients with complete dental arch implantation who had completed the first stage operation, then designed and fabricated temporary and permanent restoration structure to complete the restoration of fixed denture. At the same time, patients were asked to fill the visual analogue scale according to their comfort level to the digital impression. The clinical effect of digital impression was evaluated according to the position and marginal suitability of the prostheses, patient compfort level and postoperative follow-up. Results: All temporary and final fixed dentures were placed precisely in passive position at one time, and the fitness of prosthesis reached I degree. The comfort scores of immediate denture and permanent dentures were 84.2±2.4 and 90.5±3.9, respectively. The abutment screws of the implant were not loosened or broken, and the alveolar bone absorption was within 2mm. Conclusion: Digital impression has high accuracy, patient comfort level, and good clinical prognosis in the restoration of full arch fixed implant denture.

Key words: dental arch, implantation, digital impression, intraoral scanning, CAD/CAM