“…9 The AAP, in its exhaustive classification for the superficial chronic inflammatory processes (version of 1999), includes all those gingival manifestations of systemic conditions, and groups them in: mucocutaneous disorders (Lichen planus, pemphigoid, Pemphigus vulgaris, erythema multiforme, lupus erythematous, drug-induced and others), allergic reactions (mercury, nickel, acrylic, others), reactions attributed to toothpastes, mouthwashes, chewing gum additives, food additives) and other Unspecified conditions. 10,11 Due to the importance of these systemic conditions for the establishment of the accurate diagnosis, it was considered necessary to particularize in the alterations that they study with gingival manifestations of desquamative type.…”