This is a little experimental project that I have been working on to practice lip-syncing in Maya. I modelled the main head with teeth, eyes and tongue a seperate items.

Making the blend shapes I just duplcated the head and started tweaking. But when I applied the blend shape and started playing with the sliders I forgot to group the teeth and tongue before duplicating. Now the mouth will clatter into the tongue and teeth when it moves using the bled shape sliders.

I have tried grouping my duplicates now with duplicates of the teeth and tongue but it don't work... Can anyone help tell me how I can add these items to the blend shape or do I have to start from scratch? I know I could just use some joints in there and bind the tongue and teeth to them to do it but I don't think it would work too well...