Objective To compare the effects of 3M resin and Gradia Direct light-cured composite resin fillings on aesthetic degree in the restoration of anterior tooth incisal angle defect. Methods A total of 80 patients with anterior tooth incisal angle defect admitted to Zhangdian District Fangzhen Town Health Center from January 2022 to January 2024 were selected as the research subjects, and they were divided into the control group and the observation group by the random number table method, with 40 patients in each group. The control group was treated with Gradia Direct light-cured composite resin filling, and the observation group was treated with 3M resin filling. The filling effect, restoration effect, periodontal-related indexes, aesthetic degree and complications were compared between the two groups. Results The total effective rate of filling in the observation group was 97.50%, which was higher than 85.00% in the control group (P<0.05). The integrity rate, marginal adaptation rate and color coordination rate of the restorations in the observation group were higher than those in the control group (P<0.05). The GI, PLI and gingival sulcus probing depth in the observation group were lower than those in the control group (P<0.05). The PES score in the observation group after treatment was higher than that in the control group (P<0.05). The incidence of complications in the observation group was 0, which was lower than 10.00% in the control group (P<0.05). Conclusion Both 3M resin and Gradia Direct light-cured composite resin filling have certain aesthetic restoration effects for anterior tooth incisal angle defect. However, the intervention effect of 3M resin filling is better, with a higher aesthetic degree, better periodontal health status, and a lower risk of complications. It is worthy of clinical application.