# Thread: What is the strength of an average human's jaw?

1. ## What is the strength of an average human's jaw?

Like in PSI? What's the hardest thing we can break?

Baby bones.

3. ## Re: What is the strength of an average human's jaw?

Originally Posted by Marquis de Sade
Baby bones.
According to this article the average biting force of the human jaw is 162 PSI.

4. ## Re: What is the strength of an average human's jaw?

Found a list in Newton, has it as:

human 680
silky shark 889
spotted hyena 4500
Am. alligator 13300

5. ## Re: What is the strength of an average human's jaw?

There's a big difference between bite strength in Newtons and psi, mind. One is force, the other is pressure (force per unit area). Hardness is another issue entirely: force and pressure, if they're measured directly, will be measured using something relatively soft so it doesn't damage the teeth. It doesn't matter if you can theoretically bite hard enough to crack a rock if your teeth will shatter first.

Is there any particular reason you ask?

6. ## Re: What is the strength of an average human's jaw?

Originally Posted by Simetrical
It doesn't matter if you can theoretically bite hard enough to crack a rock if your teeth will shatter first.
Yeah I think they use several indices as to penetration etc.

Once saw a documentary with a guy and a mako shark, testing ultrafine mail armour, so the shark could bite, but not penetrate the underlying surface, since the teeth would be stopped by the mail, the sharks bite is rendered reasonably annoying, nothing more.

Sharks ofcourse bypass the rock/teeth problem by just growing new ones.

7. ## Re: What is the strength of an average human's jaw?

Originally Posted by Spurius
Sharks ofcourse bypass the rock/teeth problem by just growing new ones.
Stupid, lucky sharks. I want new teeth.

8. ## Re: What is the strength of an average human's jaw?

We can exert 4 tons of force in our bite. Or something like that

9. ## Re: What is the strength of an average human's jaw?

Ive seen people chew through kokonuts(was on a docu though, the dude did not did that one the first try haha)

10. ## Re: What is the strength of an average human's jaw?

Originally Posted by Simetrical
Is there any particular reason you ask?

No.

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