It would depend on how big the pieces of Amalgam were, and how old they are. If its just a few pieces of old amalgam, then you will be fine.
By quick elimination, I mean have some extra fibre, maybe a few prunes or some prune juice, and you should pass any pieces within the next 24 hours.
You can do an enema if you want to, but it is not necessary.
spud
Brans would be the best. Brans contain phytic acid, which has a high affinity for mercury. The phytic acid will bind the mercury so it cannot affect the body and carry it out of the body.
I prefer softer and more nutritious rive or oat brans.