For instance, teeth contain enamel, a substance much harder than bone. Despite their solid appearance, bones contain a spongy inner layer that absorbs shock so bones don't break during high-impact ...

Here’s what you need to know about each type and its role, as well as the parts and anatomy of teeth. Incisors are the eight front teeth — four on the top and four on the bottom — with flat ...

The enamel in human teeth is about 100 times thicker. The iron layer in Komodo dragons is coated on top of this extremely thin layer of enamel. The researchers think it either gives the enamel ...

In the Tufts study, the bioengineered teeth developed these ligament-like connections, a promising sign that they could one ...