Periodontal disease is a common oral disease, one of the main causes of tooth loss in adults, and a major oral disease that jeopardizes human dental and systemic health. However, not all of these tissues are ill at the same time, depending on the severity and extent of local inflammation, periodontal disease can actually be divided into gingivitis and periodontitis two major categories. Early symptoms of periodontal disease is not easy to pay attention to, resulting in long-term chronic infection of the periodontal tissues, inflammation recurrence, not only damage the function of the oral masticatory system, but also seriously affect the health.