Well, gold is free from BPA. So is porcelain. Even if you get a composite without it, there's really no telling what else is in it that could be dangerous. I mean, they were saying BPA was safe until very recently, even when the data showed otherwise. They haven't done extensive safety tests on most of the plastics we use. I have two composite fillings, but if I need more I'll be forking out the cash (or handing over the credit card actually
) for porcelain or gold.
My dentist says I might need a root canal. If the nerve in the tooth does die, I'll be getting it extracted and putting a gold one in. I totally dig the thought of looking like a gypsy, but maybe that's just me.
Also, from what I have read, the BPA from fillings does not leach indefinitely. The exposure you get is from when it is put in and for a very short time afterwards (1-2 hours). So you could minimize exposure by thorough rinsing/spitting, etc. Not ideal, but probably not the nightmare of constant exposure as with amalgam.