[The Science Behind Tooth Freeze: Why Cold Sensitivity Happens]-[Tooth Ache Tooth Cake]

Wow in the World · B1 · 2021-06-07

📋 Summary

Unlocking the Mystery of Tooth Freeze

Have you ever bitten into a cold treat, like ice cream, only to be hit by a sharp, sudden jolt of pain? This common sensation, often called "tooth freeze," has long been a mystery, but recent scientific breakthroughs have finally shed light on why our teeth react so intensely to cold.

The Anatomy of a Tooth

To understand tooth sensitivity, we must first look at the structure of a tooth. A tooth is composed of several distinct layers, each serving a vital purpose:

Enamel: The hard, white outer shell that acts as a protective coating. It is composed of dense, strong molecules that shield the inner parts of the tooth.
Dentin: Located beneath the enamel, this is the main hard substance that forms the bulk of the tooth structure.
The Pulp: Deep inside the tooth lies a soft, pulpy center. This area is home to specialized cells, including those that produce dentin and, crucially, nerve cells.

Nerve cells are the body's communication network, allowing us to perceive sensations like heat and cold. For a long time, researchers were puzzled by how a stimulus on the outer enamel could trigger such a rapid response from the nerves deep within the pulp.

The Role of TRPC5 Proteins

Recent research conducted by scientists at Friedrich Alexander University in Germany has provided the missing link. They discovered that the branches extending from the pulp into the dentin are "chock full" of a specific protein called TRPC5.

These TRPC5 proteins act as biological sensors. When you consume something cold, these proteins activate, sending a signal from the surface of the tooth down through the dentin to the nerve cells in the pulp. The nerves then relay this information to the brain, which interprets the signal as the sharp sensation of "tooth freeze." It is worth noting that these proteins are found throughout the body; for instance, they are responsible for the chilly, dry feeling in our eyes on a cold day.

Potential Remedies and Future Implications

The German researchers tested their findings by deactivating the TRPC5 proteins in laboratory mice. The results were striking: the mice showed no signs of pain or distress when consuming cold foods, suggesting that these proteins are indeed the primary culprits behind cold sensitivity.

While we are currently far from a clinical treatment that could permanently disable these proteins in humans, there is a traditional remedy that offers temporary relief. Oil of cloves, which contains an ingredient called eugenol, has been used for hundreds of years as a household remedy for toothaches. Science now suggests that eugenol is effective because it temporarily stops the TRPC5 proteins from activating, thereby blocking the cold-sensitive signal.

Conclusion

Understanding the mechanism of TRPC5 proteins changes how we view dental sensitivity. While "tooth freeze" remains a common discomfort, knowing that it is a specific protein-driven response provides a clearer path for future dental health innovations. In the meantime, for those suffering from sensitivity, the ancient wisdom of clove oil remains a scientifically-backed, albeit temporary, solution to keep enjoying your favorite cold treats.

🎯Key Sentences

I wouldn't usually make such a big deal about it

I'll see you later.

I owe you one.

Recognize me, eh?

Fancy seeing you here.

Expand All

📝Key Phrases

music to your ears

make a big deal about

all of a sudden

owe you one

take a seat

Expand All

📖 Transcript

Grownups, Wondery Plus subscribers can listen to Wow in the World early and ad-free right now.

Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.

Hey, Wowzer fans, Mindy here.

And before we start the show, I got to let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,

And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.

Oh, but that's not all, Reg.

Or study on the web version →