Some peoples genes are such that they can't efficiently excrete heavy metals. Thus, given enough time and enough fillings, they will get poisoned. Other people don't have this problem and probably will never really show signs of toxicity.

The real sad thing is its now 2007, and alternative materials for dental fillings have been available for some 25 years and some dentists still use amalgam and the ADA still argues its safe. Whats the point of that? Mercury is toxic no matter what, and there are better alternatives. It should be banned entirely in any form. There is no need for any health products or consumer products to contain mercury.

How does this statement sound:

"Hi there sir, we are going to put some lead in your body today." or how about "Hold still a sec so we can get this uranium inserted". You would have to be nuts to comply with such treatment. Well mercury is the same thing, any person in their right mind who says its not really doesn't get it.