Prehistoric Planet Store - Replica fossils including dinosaurs like T. rex, Triceratops, and more!

Tyrannosaurus rex Tooth Progression Partial Dentary

Age: Late Cretaceous - Maastrichtian ~ 65 MYA
Locality: Hell Creek Formation, Harding County, South Dakota

This reconstruction, showing Tyrannosaurus rex tooth progression, provides a fascinating look inside the tooth regeneration process of the most fierce predator North America has ever hosted.

The exterior of the dentary is intact, while the interior provides an open window to the innermost actions taking place. The Theropod dinosaurs regrew their teeth as the old ones became too worn or broke off. The blood vessels and soft tissues would have transported the raw materials necessary for healthy teeth and bone as these massive giants continually regenerated their fearsome smile and devastating bite.