Its just that my teeth use to be flared forward and have me more lip support. Now my teeth are pulled back and straight, so I have no lip support. I can just really notice a difference in my face. My surgeon just wanted to open my overbite to see how big it is to determine if I need lower advancement. My last ortho couldnt close the remainder of my overbite (had herbts unit to move lower jaw) so he flared my teeth forward.