I also did have the clifford lab test done. That was the first thing I did after I had the 1st reaction to the perm crowns that landed me in the ER. What I have learned about the test is that you can take it with a grain of salt. I would say, stay way from the things that you show up as reactive. But then again, there are a few things listed as reactive that I have used for years but not in my mouth so who knows. But there are a lot of false negatives.

There is too many events that can accure in the mouth. For example, when you have 1 crown made out of one material followed by a filling and the cement used to bound the crown, mix in saliva and food and BAM you could have a reaction.

So basically the test should only be used as a guide and a cheek and gum test is the best way to go after the blood work.

They also did some other tests on me which also showed as a negative and again, once that material was in my mouth I was reacting too it. I think it was called kinisology. But that in itself is only about 60% correct.