Baby teeth can be temporarily observed, if the teeth are completely replaced or crooked, it is best to timely orthodontic. 1. Temporary observation: due to small crowns of milk teeth, permanent teeth crowns are larger, baby teeth will appear temporary crooked, then it is best to eat some hard food to promote the development of jawbone, crooked teeth will gradually return to normal. 2. Orthodontic: tooth replacement has a self-adjustment period, if 13 ~ 14 years old or crooked teeth, this situation requires timely orthodontic, so that the teeth to restore the normal bite. Baby teeth long crooked in time to the regular hospital, strict compliance with medical advice, under the advice of the doctor to choose temporary observation or orthodontics, so as to avoid teeth malocclusion.