This is a test of commonsense. Complete the next sentence:

How to avoid getting braces
Prevent mouth breathing.
If your child breathes through his mouth frequently, this may lead to misalignment of his teeth that will eventually need correcting with braces. Take measures to make sure mouth breathing does not occur with frequency.
Ideally, the tongue should rest just inside the upper teeth. When a child breathes through his mouth, his tongue is pushed down and outside pressures are exerted on the teeth.