When there’s a mismatch or misalignment between your upper jaw bone (or maxilla ... TMJ disorders (often simply called "TMJs" or "TMDs") are a common cause of crooked jaw.

The jaw, along with a piece of a toe bone and a rib fragment ... Realizing the find might be something special, the homeowner called in experts, and soon a full excavation was underway.

Others cover just the back teeth; these are called partial mouth guards ... One of the reasons your teeth don’t keep drifting out of your jaw bone is because they touch each other at nighttime.

The jaw, along with a piece of a toe bone and a rib fragment ... Realizing the find might be something special, the homeowner called in experts, and soon a full excavation was underway.

But mammals are the last surviving members of an older group, called the therapsids ... of their skull for the jaw muscle to attach and structures on their jaw bones that would eventually evolve ...

The scales on crocodiles’ heads are very different from the skin appendages of other animals and even distinct from the scales on the rest of their bodies ...