Yep...I know a bit about cross bites...lol
My 17 yr. old daughter had one...but braces corrected it~ It was only on one side of her jaw....
When you bite down..your teeth should line up on top of each other..the top will go over a bit...
but in a cross bite...one side of the jaw..the bottom teeth go out farther than the top...creating a criss crossed bite so to speak...
Super easy fix with braces...
