As I stated in another thread (titled "Amalgam Sensitivity"), I was
having pain and a metallic taste in my mouth two weeks after getting a
second amalgam filling.  My Endodontist said there was no sign of
infection and no apparent need for a root canal.  He suggested that my
regular dentist drill out the old filling where the pain was
originating, examine it for decay and refill it.

So, I had the tooth refilled yesterday.  He did not see any sign of
decay although he did think he saw a crack in the tooth on the side
where the filling was very close to the edge of the tooth and the
remaining tooth was very thin.  He ended up drilling that part of the
tooth away, and rebuilding it with amalgam.  I thought this sounded
like a promising solution.

However, today, 24 hours after the procedure, I am still in significant
pain and the metallic taste is stronger that it was yesterday.  Any
ideas about what the heck is going on here?  If the pain continues, I
think my next step is a root canal on that tooth, which I want to avoid
if possible.  The only far out idea I can think of is a small electric
current between my two amalgam fillings (which are now of the same
metals) causing both the pain and the metallic taste, but I've been
told that is unlikely.