Orthodontic treatment can begin in young children as early as age 6 or 7, but is typically around age 8 or 9. It is known as interceptive or two-phase orthodontics. Phase 1 is pre-treatment and Phase 2 is braces. At this age, teeth are still developing and the jaw is still growing, and that enables easier treatment of certain conditions, such as overcrowding and improper bite. By age 7, a child’s mouth usually has sufficient growth and has enough sound structure to know how it will develop as the permanent teeth start to emerge. Early treatment gives an orthodontist control over where the permanent teeth come in by addressing the structure of the jaw and teeth while baby teeth are still in the mouth.