Abstract: A severe periodontitis case with severe insufficiency of lower anterior bone was reported. The diagnosis, treatment and prognosis were discussed by using modified onlay grafting technique and implant restoration, combined with periodontal and orthodontic treatment at the same time in order to provide reference for multidisciplinary joint diagnosis and treatment of oral complex cases.

Key words: advanced periodontal disease, multidisciplinary treatment, horizontal bone augmentation, implant therapy