1. After amalgam filling, please don't chew food with the affected teeth within 24 hours to avoid the filling falling off. After 24 hours, the amalgam completely hardened and no longer deformed. Second, if your teeth have been treated with root canal therapy in the past, the teeth will lose the nutrition supply of pulp and gums, and the strength will become lower. You can't chew hard objects to prevent the teeth from cracking. If necessary, please do metal crown restoration in time according to the doctor's advice to avoid tooth fracture. Third, if the teeth are inactivated (nerve-killing), please see a doctor on time and in quantity to avoid damage to deep tissues. Such as periapical periodontitis and even osteomyelitis of jaw. Four, when your teeth appear cold, hot, sour, sweet to stimulate pain, in order to avoid further development of the disease, causing pulpitis, you should go to the hospital in time.