At the age of 7, if the milk teeth have not been completely replaced by permanent teeth, you can first observe and pay attention to dental care, and then consider orthodontic correction after all the permanent teeth have come in. 7 years old is generally in the stage of tooth replacement, when the permanent teeth are born and milk teeth fall out, need to pay attention to dental care to avoid crooked teeth. Attention should be paid to moderate consumption of hard foods to promote tooth replacement and alveolar bone development, such as nuts, coarse grains. Adopt good oral hygiene habits and rinse and brush your teeth regularly. Some children can grow back to their original straight place after all their teeth are replaced. If the teeth are still crooked after the tooth replacement period, it is recommended to go to the dentist for orthodontic treatment in time, and wear braces to help straighten the teeth. Parents should pay attention to children’s dental care during the tooth replacement period to avoid crooked teeth.