This "Skull" you drew is very good in short. You drew everything highly detailed, and you applied a nice technical look to it too.
It seems to be original as well, even though I can't put my hand on it. This is, however, the first time I see such a creative skull in technical ways to be drawn, which blows me.
The technique is very good, just saddening the teeth don't look as 3D as the skull itself. Still, you drew it very skillfull, thus I can rate it good.
Finally, the Impact. It really blew my mind how it looked like when I first saw it, from all the eyes. Their shine makes the skull really the thing yoh probably aimed for, which is really awesome!
In general, I'd give this a 4.5 / 5, the skull looks well made, like in a 3D editor! Nice work.