You could do something like this

It si for an upcoming freebee from my eZine.
The hero mask can be conformed to the head then once you mouth is there and such, you can hide the head.

(I knwo that that is rendered in an unregistered software but I cannot register it any more, it is 3d Exploration, the forrunner of deep explorer...sucks snot to be able to upgrade from this, it is shareware though and fully functional says to pay $30 for the registration, btu the parent site is MIA)

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www.3rddimensiongraphics.net