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The oral mucosa is the mucous membrane lining the inside of the mouth. It comprises stratified squamous epithelium , termed "oral epithelium", and an underlying connective tissue termed lamina propria . [ 1 ]
The mouth consists of two regions: the vestibule and the oral cavity proper. The vestibule is the area between the teeth, lips and cheeks. [3] The oral cavity is bounded at the sides and in front by the alveolar process (containing the teeth) and at the back by the isthmus of the fauces. Its roof is formed by the hard palate.
Diagramatic representation of mucosal erosion (left), excoriation (center), and ulceration (right) Simplistic representation of the life cycle of mouth ulcers. An ulcer (/ ˈ ʌ l s ər /; from Latin ulcus, "ulcer, sore") [2] is a break in the skin or mucous membrane with loss of surface tissue and the disintegration and necrosis of epithelial tissue. [3]
Leukoedema lesions disappear when the mucosa is stretched, which helps to differentiate it from other white lesions in the mouth. [2] The differential diagnosis is with leukoplakia , oral candidiasis , oral lichen planus , white sponge nevus , morsicatio buccarum , [ 3 ] hereditary benign intraepithelial dyskeratosis and dyskeratosis congenita.
Oral leukoplakia is a potentially malignant disorder affecting the oral mucosa. It is defined as "essentially an oral mucosal white/gray lesion that cannot be considered as any other definable lesion." Oral leukoplakia is a gray patch or plaque that develops in the oral cavity and is strongly associated with smoking. [8]
To check the oral mucosa, the patient's cheek is exposed with a tongue depressor and the tissues inspected with a penlight. Healthy tissue appears moist, smooth, shiny and pink. Stensen's duct is opposite the second molar.
Usually found on the oral mucosa [4] of middle-aged persons, verruciform xanthomas have also been reported on the scrotum and penis [4] [5] of middle-aged to elderly Japanese males. [6] While the most common site is the oral mucosa, lesions that occur elsewhere usually arise on the perineum or on the skin with some predisposing factor, such as ...
The sublingual saliva glands empty through a series of tiny ducts in the tissue on either side of Wharton's ducts. The tongue is attached to the floor of the oral cavity by the frenulum. Sketch of an open mouth showing the frenulum and surrounding structures. Superficial veins run through the base of the frenulum known as varicosities.