I asked a Polish friend of mine with nice-looking teeth if she had braces. She said no, but she was given a special type of pacifier when she was 7 that fixed a massive overbite that she had. She says all the school children who need them are given these inexpensive, plastic devices when they are 7 and they do a fantastic job of preventing the need for braces later. I cannot find this device in the US -- or even what it would be called in English -- but here it is--
The Polish term for it translates to: nipple for teeth correction.
Anyone know anything more about this?