Normal fillings do not affect the affected teeth, but in the case of caries in the baby teeth, it is recommended that they be repaired as soon as possible. After a good repair, the baby tooth can perform its function normally and wait for the replacement of the permanent tooth. If the milk teeth are not repaired in time, the milk teeth will further develop and cause pulpitis of milk teeth, and finally cause apical periodontitis of milk teeth, and the serious apical periodontitis of milk teeth may cause the damage of the permanent teeth underneath, which is called Turner’s tooth of the permanent teeth, and it is more common in the clinic. Therefore, the filling of milk teeth not only does not affect the replacement of teeth, but also has a certain protective effect on the lower permanent teeth, if the clinical occurrence of milk teeth caries, must be treated as soon as possible.