Update 9/22/2024 Added a full assembled version, I was never able to get this one to print well, with all the supports the teeth always come out bad but feel free to give it a shot.

I originally printed this in resin, but though I would also give it a try on FDM as well and think it turned out well.

Assembly:

This will require super glue or another relatively quick drying adhesive.

I recommend attaching the 2 large Fangs to the skull first

After that the Right and Left Upper smaller jaw and teeth sections can attach to the fangs and the bottom back grove of the skull

Then you should join the Right and Left Jaw parts to the Right and Left Lower sections (as seen in the images) once those are set then you can attach both to the skull

I do not own this file, please see reference link for source.