关键词: 多学科治疗, 重度牙周炎, 预后无望

Abstract: Teeth with deep periodontal pockets and severe alveolar bone resorption from patients with severe periodontitis are often deemed“hopeless”，the clinical treatment of which has always been challenging. Moreover，multidisciplinary treatment was requested when patients suffered from severe periodontitis combined with dentition defect and malocclusion to gain health，function and esthetics. The article illustrates a combination of periodontal，orthodontic and implant therapy to manage a severe periodontitis case，which rescued severe periodontitis-compromised teeth and obtained stable therapeutic effect. This case provides clinical experience for the treatment of such patients.

Key words: multidisciplinary treatment, severe periodontitis, hopeless teeth