A brief note on nothing. A couple of decades ago there was a scare relating to the mercury in silver fillings as a cause of Multiple Sclerosis. That slowly expanded to any neurological disease.
I haven't heard much of the story lately. That may be because all of the money that can be made by removing silver alloy restorations has been made. And the results?
There has been no decrease in the incidence of multiple sclerosis in the United States. Over two decades should be enough time for the affects of new, plastic composite restorations to be seen. There is no change.
To quote from the National Multiple Sclerosis Society in the US:
"There is no evidence that heavy metal exposure causes M.S."