Spiderbaby! I had the bad taste thing before my mercury extraction for about 3 months. It went away after extraction along with the vitamine C I was taking. Next I got an infected root canal but didn't get the bad taste, just occasional sore spots on my tongue. It went away with extraction of the dead tooth. Finally now I have a temporary filling that is causing me problems -bad taste again - swollen tongue, sore spots on tongue, sore throat and wheezing. Hopefully going to get this junk removed as soon as possible and some nice friendly composite put in instead. So I reckon your problem will go with your tooth... good luck! I hate all this dental trauma as well.