Maybe, but dental gold is not gold.
dental gold is an alloy. It has other metals in it. Considering the price of gold... the gold you would get in Mexico for that price is probably only 40% gold. That seems to be the defacto standard in dentistry for gold amalgams. The rest is copper and other metals.
also there are more problems with gold than just conductivity.
they do not protect teeth and this in time will lead to crowns.
composites restore up to 90% of the original strength of the tooth.
mercury Amalgams and gold Amalgams do not offer any restoration in this sense. the tooth is left weak and fragile..
Any composite filling is perfectly fine as long as it does not have aluminum. Everything is toxic including Celery (the vegetable). There is something to be said for common sense.
Most studies that show cytotoxicity of composites are quite silly. In order to make them leech petrochemicals they are treated with industrial chemicals and heated at 150degC+. Even then, the amount of leakage is 100 times less than established levels of hazard.
Everything is toxic at such circumstances. The filling will never be under such conditions in your mouth. ...unless you like to gargle with bleach and light up with a blow torch.
Common sense people...c'mon. Don't get carried away.
The 'glue' on the other hand is important. Make sure it does not release fluoride and arsenic. If you have an IAOMT dentist, you should be A-OK.
Again this is just my opinion but don't go to Mexico. There are plenty of great dentists in the states. For example morales is a guy that does not follow IAOMT protocols. Bad very bad! Also it is recommended by Dr.Huggins not to go to Morales.
So what filling? The filling your IAOMT dentist wants to use.
Experiance and technique is more important that the brand. They are all mostly the same...a fact. Composites are hard to place and doing a good job without much experience with a particular filling is asking for trouble! But do what you want.
Biocompatibility testing is a scam. If you a do bit of research you will learn as much. Ask your dentist about providing proof and they will come clean. The results do not reflect peoples reactions to the material. There is only one way to "test" if you are compatible (not allergic) to a filling. The tongue and cheek method. Ask your dentist to give you some filling and place it between your tongue and cheek for a few hours every day for a week.