luchog
Neo-Post-Retro-Revivalist
I'm going to hazard a guess that the words "aberrant dentition" are the key words in this question.
And the fact that the health risks and benefits are well established.
That said, a surprisingly large amount of childhood orthodontic work in the US is purely cosmetic, not due to expected health risks of abnormal dentition (I believe a link to this info was posted earlier in the thread). Fortunately, uncomfortable as it is, orthodontic work does not carry the medical risks that childhood circumcision does. Doesn't stop it from being completely unnecessary in a lot of cases, however.
