To date, it is well accepted by periodontists worldwide that periodontal disease is an infectious disease that results from the body’s response to plaque. Although periodontal disease is associated with many systemic diseases throughout the body, plaque is the initial initiating factor. It is not clear why resistance to periodontal disease varies from person to person or in the same person at different times. Experts are trying to find answers to this. However, whether a person is resistant or susceptible to periodontal disease, it is possible for him and his dentist to work together to slow or control the disease through plaque control. For most people, tooth loss due to periodontal disease is not inevitable. For a given individual, the whole body is complex and genetics may vary. What we can, should and must do as dentists is to control plaque and maintain good oral hygiene in our patients so as to prevent and treat caries and periodontal disease as early as possible. To this end, we should help each individual fully understand the importance of oral hygiene and the dangers of poor oral hygiene, teach each individual to properly use the proper tools for plaque control, and encourage them to persist in it for a lifetime. At the same time, we should also help everyone to fully realize that the earliest manifestations of periodontal disease are bleeding gums and bad breath, so that those who suffer from periodontal disease can receive the earliest correct guidance and timely treatment. Bleeding gums and bad breath are two of the most prevalent and frequently underdiagnosed clinical manifestations. Currently, the common means we use is supragingival scaling. In order to protect the teeth, one needs to maintain good oral hygiene, which requires each individual to have a cleaning every six months to a year and to form a habit that lasts a lifetime. However, we get more feedback that almost no one wants to actively seek out a doctor for scaling, which is a sharp contradiction that requires our professionals to look at our practices and our ability to navigate the ultrasonic machine. We should do a good job of scaling and make our patients willing to receive regular scaling, maintain a good compliance and cooperative relationship with the doctors, and work together tirelessly for the dental health of the nation.