Patient: Description of the disease (onset time, main symptoms, hospital, etc.): I am 50 years old, suffering from dental disease for many years, gum recession, the lower teeth are still good and intact, the upper side of the big teeth have been extracted 5, all because of perennial toothache, and finally led to periodontitis, the pain of the teeth. Now the remaining large teeth again appeared not bite pain, has been more than half a year, very painful. Have repeatedly eaten anti-inflammatory drugs and laxatives, only a short time and relapse, a fire on the toothache, toothache, perennial pain, the effect of treatment is not good. What kind of dental disease is this, what causes it, and how to treat it. I’d like to thank you for your help. Jinan Military General Hospital stomatology Xu established: periodontal disease is now oral diseases in the more troublesome one, serious periodontal disease directly lead to tooth loss, periodontal disease progress is long-term, chronic, sometimes unknowingly, should cause patients to pay attention. Both professional dentists to deal with, but also need their own careful care. There are more reasons: poor oral hygiene, high calculus, poor physical condition, low immunity, and genetic factors. Specific measures: supragingival scaling, subgingival scraping, and periodontal surgery such as root planing and flap surgery.