Activity denture is generally based on the patient’s mouth, about 3-4 years need to replace a pair, because the human alveolar bone has a certain amount of resorption every year, after a long time, the activity denture and the remaining teeth in the mouth, the tissue is not close to the paste, there will be increased food debris, pressure and pain is obvious, once this symptom occurs, the need to replace the activity denture. The most important thing about movable denture is the health maintenance of the remaining teeth in the mouth, so it is still necessary to do regular cleaning of the remaining teeth in the mouth on a regular basis, denture cleaning is the daily maintenance.