Loose adult teeth, if a single tooth is loose, it may be caused by apical periodontitis, according to the situation of root canal treatment; if more than one tooth is loose may be periodontitis, according to the situation of periodontal treatment, loose tooth fixation, extraction and other treatment measures. 1. Root canal treatment: For loose teeth caused by periapical periodontitis, the inflammation at the root tip of the tooth will be relieved after root canal treatment, and the symptoms of loose teeth will gradually improve. 2. Periodontal treatment: For mild periodontitis, supragingival scaling and subgingival scraping will gradually restore the loose teeth to normal. 3. Loose tooth fixation: After periodontal treatment for a period of time, the teeth are still loosened to a certain extent, in this case, it is best to carry out loose tooth fixation. 4. Extraction: If the teeth are still loose after periodontal treatment, it is better to extract the teeth as it is not meaningful to keep the teeth in this case. Adults loose teeth to the hospital in time to check, clear cause after active treatment, so as not to lead to tooth loss and so on.