I ran into many issues trying to print the original design by Inhuman Species, so I ended up merging some pieces together in MeshMixer and it printed perfectly.
Note that it took me a while to remove all the supports and sand the prints.
EDIT:
Inhuman_Species seems to have removed his model from Thingiverse, so I am adding the teeth here. Keep in mind that it may be likely that he asks at some point that I remove my remix.
bottom.stl |
Teeth_Down.stl |
Teeth_Top.stl |
top.stl |