Orthodontic treatment in young children is known as interceptive orthodontics.
Intervention may begin as early as age 6 or 7. At this age, teeth are still developing. The jaw is still growing. That means certain conditions, such as crowding, may be easier to address.
Before permanent teeth have come in, it may be possible to help teeth to erupt (emerge through the gums) into better positions.
It’s common, for example, for the dental arch to be too small to fit all of the teeth.