Unusual pigmentation of the gingiva. Report of two different types

Two unusual types of oral mucosal pigmentation are reported. The first type is due to the use of an oral hygiene aid that is obtained from the bark of a plant, Juglans regia, that is known as Derum or Dendasa. The second type is that of a self-induced tattoo of the buccal maxillary gingiva created with soot obtained from burned wood in clay ovens.