The coating was discovered when researchers noticed that the tips and serrated edges of Komodo dragons’ teeth were covered in a layer of orange pigment. On closer inspection, the enamel was found to contain concentrated iron that makes the teeth extra hard and resistant to wear
In the latest study, a team led by researchers at King’s College London used advanced imaging, along with chemical and mechanical analytical techniques, to study teeth taken from various Komodo dragon specimens as well as numerous other living and extinct reptiles, including monitor lizards, crocodiles, alligators and dinosaurs.
The iron coating was most apparent on the Komodo dragon teeth, but similar iron-rich coverings were seen on the teeth of other reptiles. “It looks like it could be a really overlooked but widespread feature of reptile teeth,” said Aaron LeBlanc, a lecturer in dental biosciences at King’s College and lead author of the study.