My DS had a collision with another kid during a bastketball game and was not wearing a mouth gaurd-he had broken wires and the brackets were imbedded in the other kids head! Both had to leave the game because they were bleeding. It was friday night and we could not get into the the ortho til WEDNESDAY. Ugh, what a mess-but he survived and now has lovely straight teeth-he also learned to wear the mouth gaurd.