Apply a specular effect tot he inner mouth, tongue, and teeth. Glossy would be ok, but anisotropic and blinn generally work better. Both nodes are found under Lighting -> Specular. Depending on your personal preferences, you can hook them up to you specular, alternate specular, Highlight, or even alternate diffuse channels in your Poser_surface panel.

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)