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White lesions of the oral mucous membrane. The normal color of the OM range from pink to slightly red according to the site.In general the oral mucosa divided into 3 types:1- keratinized mucosa (masticatory mucosa) which appear pink.2- non

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    2. White lesions of the oral mucous membrane

    3. The normal color of the OM range from pink to slightly red according to the site. In general the oral mucosa divided into 3 types: 1- keratinized mucosa (masticatory mucosa) which appear pink. 2- non –keratinized mucosa (lining mucosa) which appear red. 3- specialized mucosa, that cover the dorsum surface of the tongue. However, many factors may cause change in color of oral mucosa like: A- vascularity B- keratin C- melanin pigment Any variation in these factors lead to changing of the color of OM , e.g.: inflammation ---- redness increase in thickness of keratin or epith layer----- white or grayish color.

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