An Acquired Pigmented Pellicle of the Enamel Surface

Abstract

A thin, structureless organic pellicle was found on teeth surfaces in a large percentage of individuals who used no abrasive in their daily mouth care. A brown-to-black pigmentation appeared simultaneously. The pellicle could be differentiated from any known enamel surface structure. Some similarity to keratin in staining properties was observed. Staining for mucin, amyloid substance and fat was negative. The mechanism of its formation and its possible significance were discussed.