He had a good dentist.
That was my take. The teeth look to be in pretty good shape. Perhaps that only means that s/he was quite young.
On the other hand, perhaps this person lost the fight, and was invited for dinner, afterwards?
Worse, perhaps the place was taken over by a large predator later, who was responsible for the cracking of the cranium into small fragments, of which this is one.
Lots of possibilities, , and they are well preserved teeth!