Those are really his teeth. If you look at the top of the head, you’ll see the tip of the skull. The whole thing was encased in plaster, with the outline of the man.
Like I said, chilling!
I understand how they filled in the “people spaces” with plaster; but I had no idea that so much of the victims’ parts were preserved. Chilling...yes. It would have seemed like the end of the world.