Objective To compare the effects of different tooth preparation methods on the recovery of dental function after oral restoration in patients with dental space. Methods A total of 120 patients with dental space admitted to our hospital from October 2022 to December 2023 were selected as the research subjects. According to different treatment methods, they were divided into the control group (68 affected teeth) and the experimental group (66 affected teeth), with 60 patients in each group. The control group received the conventional tooth preparation method, and the experimental group received the porcelain veneer incisal margin non-wrapped type-Ⅰ type preparation method. The recovery of dental function, adverse reactions and satisfaction were compared between the two groups. Results The scores of language function and masticatory function in the experimental group were higher than those in the control group, and the differences were statistically significant (P <0.05). The incidence of adverse reactions in the experimental group was 6.67%, which was lower than 31.67% in the control group, and the difference was statistically significant (P <0.05). The satisfaction rate in the experimental group was 95.00%, which was higher than 75.00% in the control group, and the difference was statistically significant (P <0.05). Conclusion The application of porcelain veneer incisal margin non-wrapped type-Ⅰ type preparation in patients with dental space can effectively improve the recovery of dental function after oral restoration, reduce the incidence of adverse reactions. It is beneficial to improving patient satisfaction, and the application value is better than that of conventional tooth preparation.