Objective To analyze the effect of intraoral digital impression on oral function and periodontal indicators in patients undergoing oral restoration. Methods A total of 100 patients undergoing oral restoration admitted to Taizhou Stomatological Hospital from January 2022 to December 2024 were selected as the research subjects. According to the order of admission, they were divided into the control group (January-December 2022) and the study group (January 2023-December 2024), with 50 patients in each group. The control group received traditional silicone rubber impression technology, and the study group received intraoral digital impression technology. The oral function, periodontal indicators, quality of life, restoration effect and marginal adaptation of restorations were compared between the two groups. Results At 6 months after restoration, the scores of oral function in the study group were better than those in the control group (P<0.05). At 6 months after restoration, the scores of periodontal indicators in the study group were better than those in the control group (P<0.05). At 6 months after restoration, the score of quality of life in the study group was higher than that in the control group (P<0.05). The total effective rate of the study group (94.00%) was higher than that of the control group (76.00%) (P<0.05). The excellent and good rate of restorations in the study group (98.00%) was higher than that in the control group (80.00%) (P<0.05). Conclusion The application of intraoral digital impression technology in patients undergoing oral restoration can improve the restoration effect, enhance oral function and quality of life, and optimize periodontal conditions and marginal adaptation of restorations. It is worthy of clinical application.