Objective To analyze the clinical effect of oral digital technology in repairing tooth defect and its influence on aesthetics. Methods From January 2022 to December 2023, 100 patients with tooth defect who received oral repair in our hospital were randomly divided into reference group (n =50) and experimental group (n =50). The reference group was treated with conventional oral technology repair, and the experimental group was treated with oral digital technology repair. The oral aesthetics, masticatory function, complications and clinical efficacy of the two groups were compared. Results The scores of repair adhesion strength, color and shape aesthetics in the experimental group were higher than those in the reference group, and the differences were statistically significant (P <0.05). After treatment, the bite force and masticatory efficiency of the experimental group were higher than those of the reference group, and the differences were statistically significant (P <0.05). The total effective rate of treatment in the experimental group was 96.00%, which was higher than 82.00% in the reference group, and the difference was statistically significant (P <0.05). The incidence of complications in the experimental group was lower than that in the reference group, and the difference was statistically significant (P <0.05). Conclusion The application of oral digital technology for oral repair in patients with tooth defect can improve the oral aesthetics and masticatory function, reduce the risk of related complications and improve the therapeutic effect, which has great clinical application value.