PS, about the cerec porcelain? "apparently" I am compatible with it according to a blood test, but there are different blocks of cerec porcelain, so hope my dentist will be using a block that I'm compatible with.

But yep, according to this dentist and any that I've spoken to, it's one of the best materials in dentistry. more than one has told me it's the closest they can find to human enamel, does not leach out it's components and is the most compatible material so far.

Hopefully they're right! I don't have amalgams, but I have incompatible composites that need to be taken out.