It is not uncommon for 孩子们 和 teenagers to have braces twice. The first time they have braces is when the child is between 7 和 11 years old. This phase of treatment is called phase one or early treatment 和 is meant to correct severe biting problems to make orthodontic correction shorter 和 easier at a later time. The second time they have braces is usually just before their adolescent growth spurt at around age 12 to 14 years old. At this time, all of the adult teeth have come in 和 every tooth can be treated. If your child had phase one or early treatment, it is likely that their second phase will be shorter 和 easier.