Thomas wrote:There are convincing arguments on both sides of this debate. For me it all came down to the fact that mercury is toxic, so I had them replaced.
Polycarbonate, which is also used for fillings, is made from bisphenol-A. This molecule was originally studied as a chemical estrogen. The bonds that hold the bisphenol-A monomer together into the polymer known as polycarbonate are weak and can be hydrolyzed. Bisphenol-A with it's estrogenic activity is an endocrine disrupting agent. The world is not perfect. One chooses which evil is the lesser. I have also seen gold fillings just pop out to due to poor bonding between the gold and the tooth.