9 years old child’s front incisors are not aligned, you can wait for all the permanent teeth to grow before deciding whether to do orthodontic treatment, all the permanent teeth can make up for the gap between the front incisors, if there is no improvement, you can do orthodontic treatment. 1. Normal phenomenon: this age is in the period of replacement of milk teeth and permanent teeth, milk teeth fall off to replace permanent teeth, which will cause uneven teeth for a short time, and it is a normal phenomenon in this period. Appropriate to eat some hard food, can promote the development of the alveolar bone, until the teeth are replaced after the phenomenon of uneven teeth will improve a lot. 2. Orthodontics: If after the film and other formal examination found that the teeth are indeed misaligned, you can wait until all the permanent teeth eruption and then according to the situation of its orthodontic treatment, recommended orthodontics, the need to do a good job of preoperative preparations, such as filming to take a mold, projection measurements, etc., to further improve the treatment plan. Be sure to go to the regular dental hospital for orthodontic treatment, orthodontic discomfort, timely consultation and treatment, so as not to delay the condition.