The Effects of Lips on the Teeth of Ancient Dinosaurs

When crocodilians are hydrated, they break down less quickly the enamel. If it's exposed to air all the time, it becomes more brittle and easy to crack and break. And we did the same thing with the Tyrannosaur,. We saw that very unlike the alligator, the enamel is equal thickness on the inside and the outside. It keeps them protected and healthy.