Hi Smitho, all dental materials have some form of metals in them, a metal free restorative does not truly exist. But most of these metals in these materials are in the form of metal oxides, not in the same state as typical amalgam or others like them.

Even denture acrylic contains metals in some form. All composites, glass ionomers etc, all contain them. But I'm sure some contain more than others and maybe this is the problem, or which ones they are and what forms they take.

You should be able to chelate just fine with your composites. see how you go.