Normally, children will have new teeth about 1-3 months after the loss of their baby teeth. People normally have two sets of teeth, one set of milk teeth and one set of permanent teeth. The baby teeth start to erupt when the child is half a year old and basically erupt around 2-2.5 years old, while the permanent teeth erupt in order when the child enters 5.5-6 years old as the baby teeth start to fall out, and there are both baby teeth and permanent teeth in the mouth during this period, and it is the main growth and development period of the child’s jawbone and dental arch. Under normal circumstances, as the permanent tooth germ develops, the roots of the milk teeth will be resorbed, resulting in the loosening of the milk teeth, and when the permanent tooth germ is about to erupt, the roots of the milk teeth will be completely resorbed, and the milk teeth will be lost in the mouth as a result. In addition, if permanent teeth have not erupted after 3 months, you will need to visit the dentist for dental film imaging. You can also check for vitamin and trace element deficiencies and take supplements. It is also important to pay attention to maintaining the oral hygiene problems of the child during the replacement of the baby teeth.