Abstract: Objective: To compare the esthetic outcome between single implant-supported immediate restoration and delayed restoration following immediate implant treatment in the anterior maxillary. Methods: Thirty-six single implants were included. All of the implants were placed immediately into fresh extractions. 17 implants received immediate provisional restorations(Group A) and 19 implants executed delayed provisional restorations(Group B) which based on temporary abutments and temporary crowns. The final restorations were performed after 6 months and assessed using pink esthetic scores(PES) and white esthetic scores(WES). Results: All of the implants gained osseointegration. The survival rate of both groups were 100%. There was no significant difference between two groups. Mean value of PES in Group A（11.45±1.77）was higher than that of Group B（11.26±1.48）, mean value of WES in Group A （8.36±1.23）was lower than that of Group B（8.38±1.25）, there was no statistically significant difference between two groups. 47.06% of Group A showed perfect pink esthetic outcome(PES≥12), 47.37% in Group B. About white esthetic outcome(WES≥9), 52.94% in Group A and 52.63% in Group B, these values showed no statistically significant difference between two groups. Conclusion: In the 12 months follow-up period, there are no statistically significant difference between two groups both in esthetic outcomes and implant survival rate.

Key words: immediate implant treatment, immediate restoration, delayed restoration, gingival remodeling, esthetic