After the lower incisors are replaced, it takes 6 to 12 months to replace the incisors, but the time it takes to replace the incisors varies from child to child because each child’s physical condition is different. If your child is too slow to replace the incisors, you can give your child more calcium or mineral-rich foods such as milk, etc., and you can also let your child do more outdoor activities and get more sunshine. In addition, in ordinary life must do a good job of oral care, so that the child to develop a good habit of brushing teeth. During the tooth replacement period, pay attention to let your child consume enough nutrition, keep a light diet, and avoid excessive intake of sweets. If the replacement of upper incisors is asymmetrical, such as one incisor grows out, the other incisor has not erupted for more than 3 months, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and symptomatic treatment.