How long a filling generally lasts is related to a variety of factors, including the doctor’s skill, the material used for the filling, and the patient’s daily care. Due to the many influencing factors, it is difficult to give a specific timeframe, and in general it may last 3~5 years. 1. Theoretically, if the patient does not have bad dietary habits, usually pay attention to oral hygiene and cleanliness, there is no congenital dental disease, the affected teeth to prepare cavities in good solid conditions, the doctor’s standardized operation, fillings, materials, programs are reasonable, then fillings to maintain the time can reach more than 10 years. But the reality is usually difficult to fully meet the above conditions, the maintenance time will be shorter. 2. However, if there are problems with the filling material and the doctor’s operation, or the patient himself does not pay attention to the care, the filling maintenance time will be even shorter, on average, the filling maintenance time may be between 3 to 5 years. Dental fillings are recommended to go to the stomatology department of regular hospitals and be operated by professional doctors. After the filling, you should develop good oral hygiene habits, brush your teeth on time, and avoid biting hard objects vigorously with the side of the filling.