Unfortunately, most doctors and naturopaths will recommend a DMSA or DMPS challange. It's a good way to tell if you have mercury in your tissues, but it can hurt people. I've spoken to some.

The best test is a urine porphyrin test, but it's hard to find a doctor who will do it or who knows what it is. This is mentioned in detail in Dr. Huggins book "It's All In Your Head".

I believe the best material use to is a methylcrylate-based filling. It's better than BIS-GMA (estrogenic/cancer-causing). It may be better than porcelain/ceramics because they contain a lot of aluminum, however, there is evidence that this aluminum is tightly bound and does not escape.

Mythycrylate is not perfect, but it's far better than mercury (no comparison) and I think most people won't have any reaction to it. There are dozens (perhaps hundreds) of fillings brands that use methycrylate or acetylcrylate which are very similar.

I would personally opt for fillings instead of having teeth pulled. We should also be careful of dentures which often contain mercury (for red coloring) and cadmium. I have spoken to two people in the past 6 months who's parents got dementia or deafness within weeks have having dentures put in.

Hope this helps.