Some people find that the teeth still ache after filling their teeth, so they often suspect that the teeth are not filled. In fact, this situation cannot be generalized. Let’s take a look at the reasons for toothache after filling: Defective or falling off of fillings Defects or falling off of fillings after filling are more common in adjacent cavity fillings, and fillings may fall off completely or partially. After filling the defect, it can cause exposure of sensitive areas such as tooth cavity or pulp angle, and it will cause pain when stimulated by cold or hot food. Defective or shedding of feeding material First find out the reason for the missing or shedding of feeding material. If the cusps are too long, do cusp grinding. If there is no retention of the tooth cavity, the retention should be made, and the root canal retention should be used if necessary. Pain due to electrical stimulation The patient with pain from electrical stimulation has a feeling of over-electricity. The cause of this pain is generally believed to be caused by pure amalgam filling. Chemical irritants Materials with chemical irritant effects include free monomers or unsaturated components in composite resins, carboxylic acids in glass ionomer cements, silicic acid in silicate cements, and zinc phosphate cements. phosphoric acid, etc. During the treatment, drugs such as zinc oxide or calcium hydroxide should be inserted into the pulp to soothe the tooth. Precautions after filling teeth 1. Follow the doctor’s advice and do not chew food and hard objects with the newly filled teeth. After filling the teeth, it is generally advisable to chew food on the affected side on the 2nd or 3rd day to prevent tooth fracture and loss of the filling material. 2. If there is slight pain after filling, you can observe yourself first, and some mild discomfort and pain can disappear in vain. If the pain is not relieved, but is further aggravated on the other side, or there is occlusal pain, throbbing pain, hot and cold stimulation pain, and spontaneous pain at night, you should go to the hospital for follow-up examination and treatment in time to find out the cause and eliminate the pain. 3. For large-area-deficient teeth with more serious caries, the teeth are prone to fractures during chewing due to insufficient resistance of the teeth after restoration. The crown of the tooth is protected to prevent crown fracture.