I feel that a stronger angle and a different composition could have made this a really interesting image. It looks a bit flat and doesn't pop out at me. I do like the soft warm light that fills the image.
Okay this is a good idea for the challenge. I do think it's a bit dark and we really don't see any detail. That combined with the end of the jaw cropped off on the left doesn't help. If we had no titles we wouldn't know what this was. Sorry.