1. Patients with high blood pressure and diabetes must have their blood pressure and blood sugar controlled before periodontal treatment. 2, periodontal treatment is a long-term process, requiring the patient’s serious cooperation and persistent self-control of plaque, in order to obtain good results and make it possible to maintain for a long time. 3. Patients with hypertension, blood diseases, pregnant women, hepatitis, HIV infection, and patients wearing pacemakers should give their medical history to the doctor to facilitate treatment.