Core Tip: Precautions and suggestions for tooth filling for the elderly Simple filling can be done at one time, and it is generally necessary to fill at least twice if endodontic treatment is required. Follow the doctor’s advice to complete the treatment on time. Some people always feel that the affected teeth are uncomfortable or feel uncomfortable when exposed to heat or cold for a few days after filling their teeth… Simple fillings can be done at one time, while those that require endodontic treatment generally need at least two fillings. Follow the doctor’s order to complete the treatment on time. Some people always feel that the affected teeth are uncomfortable or feel uncomfortable when exposed to heat and cold for a few days after filling their teeth. This is due to the trauma to the teeth caused by the instruments and drugs during the filling, which can return to normal over time. If there is no improvement after 1 to 2 weeks, you should go to the doctor to check the cause. During and after endodontic treatment, there may be short-term pain or slight swelling, which can be observed by taking the medicine by yourself, which is generally a normal postoperative reaction. If the newly filled tooth is made of amalgam material, it will take 24 hours to harden and solidify, so do not use this tooth to bite things within a day to ensure the integrity of the material. For large-area-deficient teeth with more serious caries, tooth fractures are prone to occur during chewing due to insufficient resistance of the tooth itself after restoration. Shell crown protection to prevent crown fracture. Follow up at the time agreed by the doctor. Do not brush the surface of the restoration with a rough toothbrush within a week, because the curing degree of the resin is only 50% due to light curing, it can reach 90% within 24 hours, and 100% after 7 days. Do not bite hard objects on the restoration, drink less strong tea, Smoking less, avoid metal.