I don't know any coach who would put you in...

I used to have a brace... forget the metal making you unable to wear a mouth peice for a second... if you've had one you'll know the amount of tension they place over your teeth... it'd snap when it got it... it'd be like holding paper in 1 hand and hitting it... what happens? it moves and absorbs the blow... what happens if you pull the paper at both ends? it goes tight and breaks when hit.

Not to mention the danger of chocking and cracking/chipping your teeth.

You can't fight with one... the doctor checks your mouth peice and gum guard at the weigh in and the ref does when you get into the ring. your not aloud to fight with one and you wouldn't make it past the doctor AND the ref. I doubt you'd even be given a card to start off with.