Fillings and tin foil.....AAARRRGGGHHH!?

Does anyone know why it feels as if your head is about to explode when tin foil touches metallic fillings in your teeth?





Its happened to me a few times and every time I wonder why. And no, I dont eat tin foil so no silly comments :p

Fillings and tin foil.....AAARRRGGGHHH!?
Mostly right answers above: Teeth are primarily made of calcium (soft metal) and saliva is a wonderful conductor. When a dissimilar metal touches a silver or gold filling, it sets up a galvanic current (just like a battery) If your tooth is alive, it gets zinged
Reply:Sure I know what it feels like, I think it's an electrical charge. I get white fillings now. lololol xxx
Reply:I think it has to do with a tiny electric field set up by the two metals touching.
Reply:galvonic effect
Reply:well i think it has somethin to do with ur bodys natural electrical current or something like that aided by ur salivia idk one of my teachers told me in elementary school...
Reply:the body is full of magnetism.


these two metals form a current that goes thru the nerve to ya brain,signaling pain..........simply an electrical current,weak at best,enough to hurt
Reply:horrible is`nt it, i get the same with chocolate
Reply:It's because you have 2 different metals with a liquid between them, this generates an electrical current in the same way that a lead acid battery in your car does. Your mouth is a lot more sensitive to electricity then your car, so OUCH!!!





Although that is the reason, I don't care too much, all I know is it hurts like mad