Loose teeth caused by periodontal disease can be treated by scaling, subgingival scaling, fixed teeth, and tooth extraction. Periodontal disease can lead to gum inflammation, bleeding and loose teeth, mainly because plaque stimulates the periodontium causing inflammatory reaction and destroying periodontal tissue, when calculus, food residue, uneven teeth and bite disorder exist, it will cause damage to periodontal tissue and aggravate the development of periodontal disease. 1, scaling: borrowing ultrasonic waves to remove calculus and plaque visible to the naked eye, as well as dental stains caused by smoking, removing the calculus The teeth and gums can heal together again, thus having a certain role in fixing the teeth. Scaling can also polish the tooth surface, the polished tooth surface is not easy to form new calculus; 2, subgingival scraping: used to remove calculus and plaque below the gums that are difficult to see with the naked eye, generally need to assist the probe for inspection, need to scrape away part of the diseased dentin, the formation of clean roots, in order to better heal with the periodontal mucosa and relieve tooth loosening. Subgingival scraping is the main and most effective means to treat periodontal disease; 3, fixed teeth: after the infection and inflammation symptoms of periodontal disease are controlled, metal, porcelain, all-ceramic crowns or fixtures can be made to fix loose teeth around relatively stable teeth, preserving the aesthetics and functionality of teeth; 4, tooth extraction: if periodontal disease has been very serious, the teeth are displaced, periodontal repeatedly overflowing with pus, and even causing alveolar bone resorption. If the periodontal disease is very serious, the teeth are displaced, the periodontium is repeatedly overflowing with pus, and even causes the resorption of the alveolar bone, in this case the teeth are no longer meaningful to be retained and need to be extracted as soon as possible, otherwise it is impossible to clean the plaque and avoid further deterioration affecting the surrounding teeth.