The treatment of periodontitis in the elderly is generally divided into three stages, namely, basic treatment, surgical treatment, and maintenance period treatment to ensure the long-term efficacy as much as possible. Specific treatments are as follows: 1, basic treatment: the main purpose is to remove all the dirt in the mouth as much as possible, including two types of treatment: supragingival cleaning and subgingival scraping, but also including the patient’s own oral hygiene and cleanliness of the patient’s full cooperation, as well as toothbrushes, flossing, interdental brushes, and other cleaning tools to use correctly; 2, surgical treatment: the more serious periodontitis, especially the periodontal pockets of the deeper patients need to be done in the periodontal flap surgery, so as to Surgery: more serious periodontitis, especially patients with deep pockets need periodontal flap surgery in order to completely remove the diseased tissue; 3. Maintenance treatment: the above treatment usually takes about three months. In addition to permanent and uninterrupted oral hygiene, patients should return to the clinic for regular checkups according to the physician’s instructions, in order to fully grasp the periodontal and oral conditions, and to carry out maintenance treatment in a timely manner.