title: Chemical plaque control and extrinsic tooth discoloration. A review of possible mechanisms.
abstract: The etiology of extrinsic tooth discolorations due to chemical, plaque-preventive agents is not fully understood. However, information from experimental investigations point to at least 3 possible mechanisms. (A) Non-enzymatic browning reactions (Maillard reactions). (B) Formation of pigmented metal (Fe, Sn)-sulfides. (C) Reaction products of food and beverage constituents and chemical, plaque-preventive compounds. Available evidence indicates that browning (A) and formation of pigmented metal sulfides (B) are the most likely causes of these discolorations while dietary factors (C) may play a modifying rôle.
mesh_terms: D000818:Animals; D001628:Beverages / Q000009:adverse effects; D002648:Child; D002710:Chlorhexidine / Q000009:adverse effects; D003773:Dental Plaque / Q000517:prevention & control*; D005502:Food / Q000009:adverse effects; D006801:Humans; D011817:Rabbits; D013440:Sulfides / Q000009:adverse effects; D014075:Tooth Discoloration / Q000139:chemically induced* / Q000209:etiology
chemical_list: D013440:Sulfides; D002710:Chlorhexidine