Abstract: Objective： To evaluate the accuracy of gingival perforation by modified impression method. Methods: Twenty patients with anterior tooth loss were fitted with temporary crowns which adjusted to induce gingival formation, measure the vertical distance from the gingival papilla to the gingival margin marker. Making traditional and improved impression in the edentulous area , measure the distance again and com- pared with the distance before taking the module. Results： There was no statistical significant difference in gingival perforation pattern between pre-impression and modified impression. Conclusion： Modified impression method can accurately reproduce the gingival perforation morphology and obtain ideal clinical aesthetic repair effect.

Key words: gingival, gingival perforation, impression, aesthetic repair