Children’s incisors did not fall out of the new teeth grow out, you need to go to the hospital to take pictures to check, if it is a retained milk teeth, you need to pull out as soon as possible. In the children’s teething period, due to the daily diet of soft, fine, not enough stimulation of the milk teeth, or milk teeth due to dental caries, resulting in the teething period of the root can not be normal resorption, there can be a permanent tooth eruption after the milk teeth have not come off, this time you need to take a photo examination to confirm the diagnosis, timely extraction of retained milk teeth, to avoid the permanent teeth ectopic eruption of teeth wrong jaw malformation. During the period of tooth replacement, children need to pay close attention to the eruption of teeth, to avoid the stagnation of milk teeth, permanent teeth eruption from other parts of the oral cavity, resulting in abnormal tooth arrangement, which affects the aesthetics.