Steer clear of the metals like Nickel etc. The gold....depends how pure it is. It is also very expensive. Do not get a porcelain fused to metal, you may react with the metal. People often blame the porcelain, when often it's the metal base attached.

I'd be more inclined to go for the either composites, glass ionomers or ceramics/porcelains. If you are not allergic to plastic, I'd go for either composites or ceramic/porcelain. Glass ionomers can sometimes contain more metals that maybe more leachable than ceramic, but those who have plastic allergies, may have to opt for them or porcelain. Though there is no such thing as a metal free dental material anyway, but one does not really want more than necessary if you can avoid it. Though porcelain is alot harder and doesn't tend to leach as much as the other dental materials like amalgams, composites, glass ionomers etc.

These are just the types of dental materials, but the brands and names of them are not given here. There are vast variables of each of these dental materials. And all in a way do differ to a point from eachother. You may tolerate some and not others. Depends on how sensitive you are too and how compromised your immunity is etc. Mercury poisoning also tends to make people more reactive to other things, and that doesn't help.

The diamond range of dental materials are composites (or resins). They also have bonds (cement), lining etc). There is the Diamond Crown or Diamond Lite (they are composites and I think diamond crown is also classed as ceramic as well as composite. It's tougher than the diamond link I think), Diamond bond (bonding material to bond it into the tooth) and Diamond Link (for the lining). But Diamond is only one of many different composites available. The dentist should be able to tell you whether he has diamond lite or not, or which other types of composites he has. He should be able to give you the names.

There are vast names for other composites as well made by different companies. E.g. Heliomolar HB, Conquest, Tetric ceram (which is a mix of ceramic too), Admira, Bisfil 2B, Grandio, etc etc. Many more.

Glass ionomers e.g. Fuji, Admira bond, Admira Cap, Admira protect, Cerafil, Dyract, etc etc.

Many ceramic porcelains are available and generally well tolerated, but make sure you do NOT get the ones with the metal bases. Cerec porcelain is a good one. IPS empress is another one, Degussa etc etc. Many others.

What blood test did your holistic dentist mention? Are they talking about blood test to test for mercury in your system? Or are they talking about the serum test to check for your reactions with many different dental materials to check which ones are most biocompatible for you? Because I would recommend getting a serum test if you want to be more sure about which materials you are most compatible with.

You can also be tested on EAV (voll testing) machines. Some alternative health therapists use these. You may not opt to have testing done and simply trust your luck, but it is advisable to get it done regardless. The dentist should be able to let you know what the names are of each type of dental material, not just tell you the dental materials he has, but what their names are! One dentist told me he uses heliomolar for the composite and optibond for the bond etc. And uses cerec porcelain if someone wants the porcelain instead of composites.

They should be able to give you the names of the dental materials, not just the fact he uses composites, glass ionomers, porcelain etc, but the names of each. Because they all do differ to some extent, depending on what's in them. Some maybe more biocompatible for you than others.

They can even give you samples too if you want to take them somewhere and get tested. Or you can order a serum test and when you get the results from the test, you can check the names on the form (seeing which ones came up suitable or unsuitable).