Periodontitis is a devastating chronic inflammatory disease caused by bacteria that invade the gums and periodontal tissues. The primary cause of periodontal disease is plaque, a dense, indeterminate, bacterial-dominated film that adheres to the surface of the teeth. Plaque is invisible to the naked eye and can only be revealed with a plaque revealer. Tartar is calcified plaque that plays an important role in the development of periodontal disease. Local factors such as food impaction, poor restorations, and bite wounds aggravate plaque buildup and extend it from supragingival to subgingival. In addition, diabetes, malnutrition and other systemic diseases, as well as smoking, alcoholism and other bad habits and the occurrence and development of periodontal disease also have a close relationship. Early symptoms of periodontal disease is not easy to pay attention to, inflammation recurrence, to the patient’s clinic, the general condition has been quite serious, not only damage the function of the oral masticatory system, will also have a serious impact on the health of the whole body. The key to preventing periodontal disease is to control and eliminate plaque, and the most effective way is to develop correct and good oral hygiene habits, including brushing your teeth every day, choosing and using the correct flossing, brushing, flossing, flossing, and other tools for cleaning the neighboring surfaces. As well as regular visits to the dentist for dental checkups and cleanings. It is also important to control systemic diseases such as diabetes, as well as bad habits such as smoking and alcoholism.