Don't worry I just so happen to have to get an expander for my upper pallet because it's so narrowed and I have to get braces. I'm sure you'll be fine! You're better off than I am because if the braces don't make my jaw more aligned I have to have surgery in the future and there isn't a simple solution like this D: They would have to break my jaw and then move it back or something. So you should be fine and i'd say if you were brushing your teeth good *If you brush your teeth with that on ._. * you shouldn't have cavities.