Loose teeth at age 55 are usually caused by periodontitis, and with sound periodontal treatment it is usually possible to retain natural teeth without extraction. Perfect periodontal treatment includes elimination of inflammation, restoration of function, restoration of form, and maintenance of efficacy, as follows. 1. Elimination of inflammation: Elimination of plaque and tartar is the first step in elimination of inflammation, and it is necessary to remove plaque or reduce the occurrence of plaque in a consistent manner. 2. Restore function: Repairing missing teeth, adjusting occlusal relationship, correcting bad occlusal habits, etc. can help control inflammation. 3. Restore the shape: the lesions caused by periodontitis such as periodontal pockets, bone defects, gingival recession, loose teeth, etc. can be restored to the physiological shape of the gums and bone through the corresponding surgical treatment. 4. Maintenance of efficacy: Perfect treatment includes long-term maintenance of efficacy, such as self-control of plaque, smoking cessation, regular review and retreatment. If the looseness of the teeth is serious and cannot be retained, extraction is also an option, and it is recommended to go to the hospital in time to receive professional treatment.