Amalgam fillings

I need a 300 - 500 word article on amalgam fillings. This is being directed at people who have no medical knowledge. The audience will be considering or actually doing a detox program. I want to show how amalgam fillings leak mercury into the body, and how this can effect their health. A further 200 words also to be written specifically on the effects of root canal therapy on a persons health, in regards to the possibility of chronic low grade infection.