I have and overbite and am most concerned about my profile. I do not want to get four perfectly healthy premolars extracted when I do not feel it is necessary for the top. Do I have severe overcrowding on the bottom front four teeth to merit extractions. I would much rather expand the lower arch because I don't like how prominent my nose is. Would 2 extractions on top and bottom make me look sunken or dishes in? What do you think?