Why do you feel pain when you have a filling and bite tin foil?
Answer:
The silver amalgam filling you got is probably very deep and close to the nerve of the tooth. The amalgam acts as a conductor. Even though a base or insulator would have been placed beneath it, When metal of a different type comes into contact with it an electrical charge is created and is conveyed to the nerve. Galvanic current.
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Good Luck
I am guess its an amalgam filling (silver). There is a electrical current between the foil and the filling. The filling needs to corrode before the current is broken. This may sound a little strange but if you eat hard boiled egg yolk it corrodes the filling and it no longer has an electrical current. I once did and amalgam filling on a girl who had her lip pierced and she called us about and hour after the appointment complaining of pain. We told her to take the lip ring out and the pain went away. Metal on metal doesnt go over so well.
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