Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds ...

Millions of people are affected by chronic dry mouth, or xerostomia, an agonizing side effect of damaged salivary glands.

Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives important feedback about temperature, pressure—and yes, pain—as we bite and chew ...