Loose teeth are categorized into loose milk teeth and loose permanent teeth. Loose milk teeth can be temporarily observed or extracted according to the situation; loose adult teeth can be caused by apical periapical inflammation or periodontitis, and root canal treatment, periodontal treatment or tooth extraction can be chosen according to the situation. 1. Temporary observation: if the loosening of milk teeth is serious and the permanent teeth have not erupted, you can let the child eat some hard food to promote the root resorption of milk teeth, and the teeth will fall out automatically after the root resorption. 2. Tooth extraction: loose milk teeth and permanent teeth have already erupted, in this case, it is best to extract the milk teeth to avoid misalignment of the permanent teeth eruption. 3. Root canal treatment: loose teeth caused by apical periodontitis, in this case, timely root canal treatment of the tooth, so that the infection in the root area can be controlled, the apical area of the bone tissue will heal, and tooth loosening will gradually disappear. 4. Periodontal treatment: loose teeth caused by gum recession due to periodontitis, this situation requires periodontal treatment, such as gingival scaling, subgingival scraping or root planing, so that the loose teeth gradually return to normal. 5. tooth extraction: due to pathological root resorption caused by inflammation of the teeth caused by loose teeth, this case after the inflammation control under local anesthesia to remove the teeth. Tooth loosening timely to the hospital examination, clear cause and symptomatic treatment, so as not to delay the condition.