I was told by a doctor that her husband went to Costa Rica to see a US trained bio dentist who treated him for 1/10 of what he was told his treatment would cost here in the US. Does anybody here know of a very good, very reliable bio-dentist? I need permanent bridges put in, the extraction work is done. Also, what is the best material for bridges? What doctors call "ceramic" is really heavier metals than mercury. Does anybody have info on this? or is it healthier to get them all extracted and getting plastic dentures?