The common factors of loose teeth in middle-aged and old people are trauma, periodontal disease, apical inflammation and so on. According to different causes, different treatment methods are adopted, including: tooth fixation, medication, gingival scaling, root canal treatment, denture repair and so on. 1. Trauma: dental trauma may be acute trauma, or the original periodontal disease by mild trauma caused by loose teeth. X-ray examination can be carried out. If it is only semi-dislocation, it can be fixed with periodontal splint or arch splint. 2. Periodontal disease: Periodontal disease is one of the common causes of loose teeth in middle-aged and old people. It can be treated with supragingival scaling, subgingival scraping and root planing, etc. At the same time, oral metronidazole tablets, tinidazole tablets, amoxicillin capsules and other medications for anti-infective treatment. 3. Apical inflammation: If the chronic apical inflammation is mild, root canal treatment can be carried out; if the inflammation is obvious, the tooth has been Ⅲ degree of looseness, apical lesion is large, need to extract the loose teeth, scrape off the inflammatory granulation tissue around the root tip, to be healed jawbone, and then denture repair. There may be other reasons for loose teeth in the middle-aged and elderly, so it is recommended to consult a doctor in time to clarify the reasons so as not to delay the condition. The above medications should be used under the guidance of a doctor.