Winter, you are mostly correct regarding the amalgam fillings. The formulation you gave is for one of the more common amalgams sold, but there are several varieties of dental amalgam. This is a very controversial topic in dentistry right now. Current thought says it may be more dangerous for the dentist that puts it in than the patient that walks around with it.
Stock49 - many business are very good at education - its amazing that "cheap" usually outweighs "good" in the free market place. Then consumers blame the business for their bad choices they knowingly made Its the deceptive business I have a grudge against.