Galvanic corrosion between gold and amalgam?

Mar 24, 2014

My tooth 18 has a largish amalgam filling which includes the side of the tooth facing tooth 19. I've had that filling in place for about 6 months and haven't had any issues with it. My dentist used amalgam since he said it was the most durable filling for molars (I also don't buy into the amalgam/mercury panic).

I had a PFM crown on tooth 19 which needed to be replaced due to a gap between the crown and tooth (that crown was NOT done by my current dentist). I opted for a gold crown since it offers the best performance. The gold crown was placed two weeks ago.

Since getting the gold crown I've started noticing the amalgam filling will sometimes have a metallic taste. This isn't something I've ever experienced before and have been pondering what it might be. So I was wondering, is it possible or even probable that there's a galvanic reaction occurring between the amalgam filling and the gold crown right next to it?