There is no specific time standard for the maintenance time after a filling. Normally, the life span of a filling material varies from 3 to 10 years. The specific service life is correlated with the filling materials, daily care and other factors. At present, the commonly used filling materials include composite resin, silver amalgam, glass ionomer resin, etc. Composite resin is the most widely used filling material, which has the characteristics of fast restoration and affordable price. Usually, its service life can last 3-5 years. Silver amalgam and glass ionomer resin have the advantage of longer life compared to the former, but they are more expensive. In addition, good life and care measures can play an appropriate role in extending the life of filling materials. For example, strengthen oral cleaning care, avoid biting hard food, custom-made shell crown protection, etc. After the filling treatment, if there is a slight pain symptom, you can observe by yourself first. If the pain persists or intensifies, you need to go to the dentistry department for follow-up examination in time to confirm the cause of the disease and then make symptomatic treatment.