The growth of new teeth without the loss of children’s teeth is generally called retained milk teeth, which needs to be handled according to the specific conditions of children’s teeth. If the child has already erupted permanent teeth, or the direction and position of the permanent teeth are abnormal, in order to avoid the normal growth of permanent teeth, it is recommended that the retained milk teeth should be extracted as soon as possible under the guidance of the doctor. If a child’s retained milk teeth are intact, have no other symptoms, and are obviously loose, with a small amount of inherited permanent teeth erupting or about to erupt, you can choose to wait for the child’s milk teeth to fall out on their own, without the need for extraction. Parents who find that their children’s teeth are not falling out, it is recommended that they go to the hospital in time, and choose the appropriate treatment under the advice of the doctor.