The expiration date of dental fillings cannot be generalized, it is about 1 to 5 years. It is related to the patient’s usual use and the material chosen for the filling, and the details are analyzed as follows: If the patient often do oral care after filling, regular scaling, and develop the habit of brushing every morning and evening and rinsing after meals. And the choice is resin-based materials, the validity of the filling will be extended, about 3-5 years. However, if you usually do not pay attention to oral hygiene, resulting in teeth will again caries, filling material loose off, can directly affect its service life, generally less than 1 year, or even shorter. In summary, the validity period of dental fillings can not be generalized. After the filling should develop good hygiene habits, diligent brushing, rinsing, and at the same time in daily life should avoid eating hard food.