amalgam tattoo is a benign discoloration of the mouth membrane. It results from amalgam particles – usually from silver fillings or root canal treatment -- falling into small, open wounds created during dental treatment or by trauma shortly after a dental treatment, when small, fresh amalgam particles still cling to the mucosa. Foreign particles may be large enough to be seen on x-rays.
Once present, the amalgam tattoo remains indefinitely and occasionally the tattoo is seen to expand over time as inflammatory cells beneath the membrane try to clean up the area.
Treatment consists of an non-invasive procedure geared to gently remove the layers of discolored tissue. The body then heals with new, non-pigmented gum.