Tusks

Tusks are elephants incisive Teeth. There is a pulp inside, and thy have "open roots" why the tusks continue to grow throughout their lifetime, even if they get shortened.

About half the tusk is visible, the rest of the unexposed tusk goes inside the cranium, why poachers always kills the elephants so they can remove all the Ivory.

Asian female elephants may have Tushes

From Elephant Glossary