I found an interesting link that shines some light on your concern. I am looking into this further and I have a call into Hulda Clark as well. You may have discovered an important caveat with zapping. It could set up a galvanic response between Amalgams containing metal or conducting dental materials. This in turn would leach these materials out quicker. Basically you would set up a battery in your mouth. This absolutly needs further studies and I have also stopped zapping for the time being as my mouth is full of mercury. Not for long though.
I also understand that not all replacements are healthy either. In fact I have seen some reports that people have had different health problems arise from their new replacement fillings. We can't be too careful it seems. I also understand that there are a couple of materials being used in Europe that have had a very good track record for many years. I am looking into this. If anyone has more info to share on this discussion, it would be most helpful.
Thanks cutie pie for flagging this. Here is the link: http://www.cfspages.com/mercrel.html