It is also important to prevent tooth decay even after a tooth has been filled. When Xiaogang’s deciduous teeth were slightly decayed, his mother quickly took him to a plastic surgeon to have the teeth filled. The mother thought to herself: "Now I can rest assured. At least this tooth will last until the child replaces his teeth, right?" One night, the mother was awakened by Xiao Gang who was crying and restless. When she asked, she found out that the child had a severe toothache and that he often had toothaches. The mother knew very well how uncomfortable a toothache was, so she quickly took her child to have a plastic surgery. The result of the doctor's examination was that deep caries caused acute pulpitis, which required pulp opening and decompression. The "culprit" was the filled cavity. This made my mother wonder: "Why do teeth still have cavities after fillings?" Expert Zhang from Beijing Yaliang Plastic Surgery and Dentistry commented: Generally, people think that deciduous teeth can last for many years after fillings. But why do deciduous teeth still get decayed after fillings? In addition to the small size of deciduous teeth themselves, which are difficult to prepare a good retention cavity, there are also the following two factors: The child did not cooperate with the doctor properly when the cavity was prepared. , because the children did not cooperate with the doctor's treatment, resulting in blood and saliva contamination, the hole lining and filling materials could not be well adhered to the hole wall, causing edge leakage, resulting in caries. If you don't follow the doctor's advice, you should usually wait two hours before eating after a metal filling is made, and you cannot chew on the filled tooth. However, many children are clamoring to eat as soon as they undergo plastic surgery. Although parents will remind their children to eat carefully, the chewing movement of food in the mouth will still hit and rub the filling, causing it to loosen, break, or even partially fall off. This may cause slight discomfort, and some children will use their fingers to dig, causing material defects and secondary caries. Therefore, when a child has caries and needs filling, in addition to choosing regular plastic surgery, parents should also patiently do ideological work on the child before and after treatment, strengthen supervision of the child, and prevent the consequences of artificial filling failure.