Among the people who had braces, I was very surprised to see someone I knew whose chin was very slim. It seemed like they had lost weight around their jaw line.
 I heard that correction doesn't change the bone shape of the jaw, but
 it does change the position of the jaw?
 
However, they say that the slimmer appearance after correction disappears a few years after correction. Is this true?
 
I wonder if being thin is the same as long as you don't gain weight.