Metal parts?

Is there any rule against competing with artificial limbs or rods to fix bones. I don't think Assuncao's ankle will give him an advantage, but what if a fighter had a rod in his leg or a prosthetic leg?

Tiresias - Or spikes coming out of your shin but then when you kick someone you can retract them so you don't get stuck and then kick them again.

Exactly. Can Wolverine start training UFC? Six months sprawl training and he takes the title.

they let silva fight diaz and he has a metal rod for a shin if im not mistaken right?

Good point, I guess the question should be how much metal is allowed?