If you have old silver fillings and you've been wondering whether it's safe to have them removed, the honest answer is: it depends on how it's done. Removing amalgam releases mercury vapor. Done without the right precautions, the removal exposes you to more mercury than leaving the filling in place.
The SMART protocol (Safe Mercury Amalgam Removal Technique) is a standardized approach designed to minimize your exposure throughout the process. That means a rubber dam to isolate the tooth, high-volume suction, sectioning the filling into chunks rather than grinding it down, and proper ventilation throughout.
Every dental school teaches that the most dangerous time for an amalgam filling is when it's being placed and when it's being removed, which is exactly when mercury vapor is released. And it's more than vapor: amalgam is about 50% mercury by weight, so we also don't want you swallowing any of the particles as the filling comes out, which is exactly what the rubber dam and high-volume suction are there to prevent. It's fair to wonder why those same precautions aren't standard everywhere. If your fillings need to come out due to decay, cracking, or your own preference, the protocol matters, and biologic dentistry takes it seriously so you don't have to navigate it alone.