Why do teeth have cold sensitivity, but not hot sensitivity?

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I was just wondering this when I was eating some super hot french fries. THanks!

In: Biology

I have both and from what my dentist told me it is from my fillings being metal and close to a nerve in the tooth

Think of it this way –

The human mouth is about 98.6F/37C. 125F/50C is going to be uncomfortable to the rest of the mouth, 149F/65C will cause almost instant burning.

So, 13C difference between the mouth and a substance that will be uncomfortable, 28C difference between the mouth and something that will instantly burn your mouth. 13C colder than 37C is 24C/75.2F, or room temperature. 28C colder than 37C is 9C or 48.2F, cold-ish but significantly warmer than a refrigerator. Generally speaking people aren’t getting sensitive when they’re taking say, tea out of the fridge and drinking it after leaving it out for 10 minutes.