dentists, like doctors, like to bury their mistakes. just be aware. i looked in the holes in my teeth before i let the dentist fill them back up with diamond lite.
any metals are gonna be bad in your mouth. no telling what effect they are having. there is not only the toxic metals themselves, but the disruption in normal electrical flow. either one of those could enable a critter to hide and thrive.
i am happy to hear you will finally be getting a look in that noggin of yours. you are in my prayers, dear one.