Objective To investigate the effect of light-cured composite resin on the clinical effect and satisfaction of dental defect patients with oral aesthetic restoration. Methods A total of 70 dental defect patients who underwent clinical oral aesthetic restoration in our hospital from April 2020 to July 2023 were randomly divided into reference group and study group, with 35 patients in each group. The reference group was repaired with porcelain crown, the study group was repaired with light-cured composite resin. The clinical effect, satisfaction rate of masticatory function, color satisfaction rate, adaptation satisfaction rate and complications were compared between the two groups. Results The total effective rate of treatment in the study group (97.14%) was higher than that in the reference group (77.14%) (P <0.05). The satisfaction rate of masticatory function, color satisfaction rate and adaptation degree in the study group were higher than those in the reference group (P <0.05). The incidence of complications in the study group was lower than that in the reference group (P <0.05). Conclusion Light-cured composite resin is beneficial to improve the therapeutic effect and promote the improvement of masticatory function in oral aesthetic restoration, and patients have higher satisfaction with the color and adaptation of the restoration, and the risk of complications is low, which is worthy of clinical application.