One of the main dilemmas in so called amalgam studies, is that the vast majority do
not incorporate true control groups which have genuinely not been exposed to dental
amalgam. What is neglected is the possibility that non-amalgam controls may at some
point in their earlier life have had dental amalgam fillings over along period of time and
may thus display a higher body mercury load. These studies cited by many authors and
institutions.10, 13, 19, 48, 55-59 as proof of the putative harmlessness of amalgam do not use
proper non amalgam control groups. Melchart et al.
60 found that amalgam removal