Simple mouth rig?

Hi,

So I’ve been trying to learn how to rig and animate characters. I’m using digital tutors, cgcookie, and a few other online resources to learn blender. I can’t seem to find much on teeth in a mouth rig though? I understand how to model a mouth and use shape keys. How do I go about including teeth? I downloaded some free rigs to try and figure it out, but the teeth seemed to be a separate object and I wasn’t sure how they were attached to the face shape keys.

I’m new, so I’m looking to keep things simple, if you know of any resources or techniques, please point me in the right direction.

Thanks!

in recent versions, you can make shape keys on top of armature deformations, so you just put your mouth in an open position with the armature, and make a shape key on top of that.