关键词: 磨牙, 重度牙周炎, 微创拔牙, 位点保存术

Abstract:

With the development of implant surgery，more and more dentists and patients restore the function and aesthetics of the edentulous area with implant restorations. The preservation and reconstruction of the alveolar ridge and the gingiva is a prerequisite for long-term success in the restoration of satisfactory functional and aesthetic effects. The molars with severe periodontal lesions were affected by many factors，which resulted in severe infection and alveolar bone absorption before removal. This paper presents a case of a molar with severe periodontal lesion，which was removed with periodontal traditional incision technique and minimally invasive extraction. By completely removal of the sockets infection，the surgery promotes the healing of follow-up site preservation，and achieved good clinical effect.

Key words: molar, severe periodontitis, minimally invasive extraction, ridge preservation