Abstract: Objective:To investigate the treatment and aesthetic restoration of anterior tooth loosening and falling in the patient with severe periodontitis, and to clarify the curative effect of multidisciplinary treatment in the anterior esthetic zone, and to provide reference for its clinical application. Methods: The male patients was 57 years old,and saw a dcotor becasuse of anterior teeth loosening and discomfort for more than half a year. The specialized examination:11, 21, 22, 41 Ⅲ° loose, 42 Ⅱ° loose. After multidisciplinary consultation, the teeth were treated with periodontal therapy. After inflammation was controlled, 11, 21, 22, 41, 42 were removed for immediate implantation. The platelet rich fibrin (PRF) combined with guided bone regeneration (GBR) was used to repair the bone defect around the implants. Because of the aesthetic requirements of the patients, tooth preparation was performed for 12, 13, 23, 31, 32, 33, 43 after root canal therapy. Fixed restorations were performed in 13-23 and 33-43. Results: After operation, the implant was well positioned and the bone surrounding the implant was adequate. The soft tissue in the mouth healed well and the degree of the alveolar ridge was better. After restoration, the masticatory and phonation function of the teeth were restored, and the patients were satisfied with the aesthetic effect. Conclusion: Through the application of multidisciplinary treatment, the implant repair of the anterior esthetic zone of the patient with severe periodontitis is successfully achieved, which opens a new way for the diagnosis and treatment of the anterior esthetic zone.

Key words: teeth loosening, teeth falling, aesthetic repair, periodontitis, immediate implantation, guided bone regeneration, case report