Why does your teeth get hard on a plane?

Question

On a plane: Have anyone ever felt like when they bite their teeth it feels the same as when you have your braces placed on for the first time?

Answer 1

Its not your teeth.  Its just the feeling of pressurization that screws with you sinus's. It affects your ears, nose and throat and tightens up your tissues.

Answer 2

Uh, I never noticed that. That's weird...

Answer 3

I've never felt that.

maybe it's the pressure and the altitude

isn't everyone's teeth hard......?