For the treatment of periodontal disease, it is necessary to first understand and evaluate the condition of periodontal tissues and the degree of destruction, which usually includes the root tips of the whole mouth, X-rays and periodontal pocket depth measurement, etc. After the evaluation, a treatment plan can be formulated. The treatment of periodontal disease is usually divided into four stages: Initial treatment: ultrasonic cleaning to remove plaque and tartar, scraping of deep periodontal pockets and root leveling, removal of undesirable objects, bite interference, etc. Surgery: After one month, the more serious affected parts, especially the deeper periodontal pockets, need to do periodontal flap surgery in order to completely remove the calculus and diseased tissues. Periodontal surgery is a local and safe procedure that can be performed in a dental clinic. Under local anesthesia, the gums are slightly opened, and the calculus and flesh tissues deep in the periodontium are completely removed. If there is bone loss, “periodontal regeneration film” and “artificial bone powder” can be placed to regenerate the damaged bone tissues for the purpose of actively rebuilding periodontal tissues. Loose teeth fixation and restoration treatment period: To fix loose teeth, restore missing teeth, and maintain the integrity of the dental row. Maintenance period: After going through the above treatment, which usually takes three months to six months, and betting so much time and effort, it is extremely important to maintain the results. In addition to doing your own good oral cleaning permanently and uninterruptedly, you should follow the physician’s instruction to have regular ultrasonic scaling of the whole mouth and regular follow-up and examination to fully grasp the periodontal and oral conditions.