Chronical quicksilver or bismuth intoxication show scalloped pigments along vessels and basal membrane of the gingiva. Additionally the pigmentation is often followed by hypersalivation and metallic taste.
Silver or gold pigmentations represent as blue-violet discoloration of the gingival margin. Plumbism causes bluish-black discolorations in the gingival tissue. It happens only in patients with natural dentition and almost entirely in people who work with lead. Children often take objects like crayon or coloured pens into their mouth which, in turn, easily leads to discolorations. This must always be taken into consideration. Therefore a complete anamnesis is absolutely essential.