Can braces fix my overbite or the problem is mainly in my lower jaw and need surgical operation ? Im 20 years old and sucked my thumb as kid for a long time so probably this is one of the reasons for my overbite . I really hate my smile and facial profile and want to fix that problem . When I close my mouth upper teeth cover completely my lower teeth , but when I try to place my jaw like I have underbite , my face looks somehow normal like the last photo.