Hi Russ, thanks for the extra info. I'm looking at the restoration heliomolar at the moment. Not sure what to think of it. I saw it on your materials list, but I don't know if it's good or bad, just seemed like most other types of resins with drawbacks. I guess I can only go by my serum test, plus the biologic dentist who uses it who seems to think it's bicompatible anyway.