A 40-year-old tooth that shakes but does not fall out may be caused by acute apical periodontitis, periodontitis, alveolar abscess, dental trauma, etc. Depending on the situation, we will choose root canal treatment, periodontal treatment, abscess incision and drainage, and loose tooth immobilization and other treatments. 1. Root canal treatment: If the tooth is shaky due to acute apical periodontitis, root canal treatment will be carried out on the tooth in time, and after the inflammation at the root tip of the tooth disappears, the shaky tooth will gradually return to normal. 2. Periodontitis: teeth will be loosened to different degrees in the case of periodontitis, according to the degree of inflammation, we can choose supragingival scaling, subgingival scaling, and root planing or periodontal surgery if the inflammation is relatively large, and the wobbly teeth will gradually return to normal. 3. Incision and drainage: If the tooth is shaky due to alveolar abscess, it is best to incise and drain the abscess in time, and the shaky tooth will return to normal after the inflammation disappears. 4. Loose teeth fixed: dental trauma caused by tooth wobbling, first of all, let the affected teeth rest, do not use the affected teeth within two weeks to eat, and at the same time, loose teeth fixed surgery, generally fixed for 3 to 4 weeks. Teeth wobbling but not fall, it is best to go to the hospital in time to check, clear cause and symptomatic treatment, so as not to delay the condition.