This is a hard, brown deposit that forms on their teeth, usually their front teeth. This is caused when chlorinated water gets in your mouth and breaks down the minerals in your teeth. The problem ...

CT scan of the front of a skate ... found that dentine — a substance in the inner layer of teeth that sends sensory information to nerves inside the pulp — served a similar sensation-gathering purpose ...

A new study published in Nature traces the evolutionary origin of human teeth to sensory structures found on the exoskeletons of extinct fish. Researchers say the same "genetic toolkit" that ...

Brush teeth and gums at least twice a day. If you can, brush 30 minutes to 1 hour after every meal. Brushing removes plaque, a film of bacteria that clings to teeth. When bacteria in plaque come ...

🚨NEW DRUG TO REGROW TEETH ENTERS HUMAN TRIALS Japanese researchers developed a drug to regrow teeth, set to begin human trials in September. The drug blocks the USAG-1 protein, which suppresses ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The sensitive ...

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 ...

Calcium deposits on teeth, also called tartar or calculus, form when plaque hardens with minerals from your saliva. These deposits can irritate your gums and cause dental problems, and they need to be ...

Yara Haridy, an evolutionary biologist at the University of Chicago, likes to stun people by telling them that our skeletons evolved from a jawless fish. "Much of what we have today has been ...

A recent study reveals that human teeth evolved from the sensory armor of ancient fish that lived 465 million years ago. Researchers discovered sensory tissue on the exoskeletons of these fish ...

CT scan of the front of a skate, showing the hard, tooth-like denticles on its skin (shown in orange). Credit: Yara Haridy. Even the gentlest sip of a cold drink can send a jolt through our teeth.