All Game works really well! Taxidermists will know what product Im referring to, but its a two part clay that when mixed together for finish work it hardens like a rock, retains its whitish color, and can be painted and wont fade. It works really really well when mixed and used in the mandible (lower jaw ) where the socket connects to the skull. Put a fair amount in there, press the mandible into the clay that is the socket and position the jaw in the position you want...the trick is you need to keep the jaw in the desired position for at least 6 hours for it to harden. Once hardened you can paint, if needed, to touch up.
Anyway, a suggestion. Joel- BRT