If a child has tooth decay, it is also necessary to go to a professional dentist as soon as possible to check the age and tooth position of the child. If the teeth are close to the age of the alternating period of milk and permanent teeth, and the teeth will be replaced soon, the milk teeth can be considered to be extracted directly, and the corresponding gap will be preserved after the extraction, waiting for the eruption of permanent teeth. However, if there is still a long time before the eruption of permanent teeth, it is necessary to treat the decayed milk teeth, generally, the same dental high-speed turbine drill is used to remove the decayed part of the milk teeth, and special filling material is used to repair the decayed milk teeth. If the caries develops to the pulp, the root canal treatment of the baby tooth is also needed.