Major Project - Bed Rigging #3

Today I work on getting the bed to blink and to open his mouth, I did this via a duplicate mesh and plugged it into the main as a blendshape. I used blendshapes to also reshape the mouth as it opens, this then all got plugged into the main mesh.

This is what the blink and mouth opening look like, I still need to add the contents of the mouth which is what I will focus on next. I'm not completely sure how to make the teeth follow the mouths movement, as it is driven from a duplicate mesh. I may need to use rivets or something similar to have them follow the geometry but I am unsure at the moment.