This is related to the Minamata Convention. Reading this article made me wonder if I have any amalgam fillings. As far as I can figure out at this point, amalgam (which contains mercury) has been used in Japan and, though reduction has been called for, has not yet been banned. It might be a good idea to double check before you have a cavity filled.
http://news.yahoo.com/industry-leader-censors-stories-written-dental-news-reporters-124900284.html
