Diamondlite has long been thought to be the best, and I have several fillings, but from what I can gather, the manufacturer does not give a list of ingredients, which has made some dentists move away from it: i.e. how can diamondlite be the safest if we don't know exactly what's in it? My dentist used to use it, but now uses Glacier. I don't know anything about this filling material, but I had it at last removal because I trust his judgement that it's the best composite at the moment. Biocompatibility tests are a good idea. I didn't have one last time, but I did the time before.