Abstract: Objective: To observe and compare the clinical effect of flap and flapless in the immediate implantation of maxillary anterior teeth. Methods: We divided 30 patients into flap group and flapless group randomly. The two groups were used implants from SIC. Biooss bone powders mixed with the autograft obtained during the implantation surgery as bone graft material. Then infiltrated by their own blood, and the absorbable collagen membrane as the barrier membrane. In the flap group, immediate implantation was performed after gingive incised, while in the flapless group, immediate implantation was performed only with the extraction socket during operation. The patients were followed up for 1 year. The gingival papilla index, alveolar bone resorption height around the implants and the postoperative satisfaction were observed. Result: One year after the operation, the gingival papilla index and alveolar bone absorption of the two groups were compared, and the satisfaction about the operation was compared, while that of the flapless group was better（P<0.05）. Conclusion: Immediate implantation without flap can effectively improve the effect of implantation, and patients feel better.

Key words: immediate implant, anterior teeth, flap, flapless