I cant help you with your original question,but I do feel the need to have you prepare yourself and her for how it might feel...NO ONE warned me, and I was worried. When I had mine taken out..I was 18 BTW, so it could be different..but I took it out over the sink, and there was a lot of bleeding. I was so surprised, but they later told me that it was likely that a layer or more of skin had become attatched to the expander. So, it was really gross, and then, the other thing was that it smelled and tasted awful..which again was later explained that frequently food particles get stuck and you never know it... you can imagine. The roof of my mouth felt like I had a pizza burn for several days, so I would not do it immediately before a trip, she may be uncomfortable. It was obviously several years ago, and it might not be the same, but on the off chance that it could, you are at least prepared with some questions to ask the dr. when they take it out..I really think I would have handled it better had I just known. Good luck to you, and her for sure! ~A.~