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  2. Labial commissure of mouth - Wikipedia

    en.wikipedia.org/wiki/Labial_commissure_of_mouth

    The commissure is the corner of the mouth, where the vermillion border of the superior labium (upper lip) meets that of the inferior labium (lower lip). The commissure is important in facial appearance, particularly during some functions, including smiling. As such it is of interest to dental surgeons.

  3. Morsicatio buccarum - Wikipedia

    en.wikipedia.org/wiki/Morsicatio_buccarum

    The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) [5] classifies the condition under "Other Specified Obsessive-Compulsive and Related Disorder" (300.3) as a body-focused repetitive behavior; the DSM-5 uses the more descriptive terms lip biting and cheek chewing (p. 263) instead of morsicatio buccarum.

  4. Mouth ulcer - Wikipedia

    en.wikipedia.org/wiki/Mouth_ulcer

    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]

  5. Vermilion border - Wikipedia

    en.wikipedia.org/wiki/Vermilion_border

    Perioral dermatitis is a rash typically around the mouth, that spares the vermilion border. [10] Cheilitis glandularis may present with a burning sensation over the vermilion border. This chronic progressive condition is associated with thinning of the skin of the lips and ulceration. [11] Infections may involve the vermilion border.

  6. Oral mucosa - Wikipedia

    en.wikipedia.org/wiki/Oral_mucosa

    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]

  7. Cold sore - Wikipedia

    en.wikipedia.org/wiki/Cold_sore

    Rare reinfections occur inside the mouth (intraoral HSV stomatitis) affecting the gums, alveolar ridge, hard palate, and the back of the tongue, possibly accompanied by herpes labialis. [14] A lesion caused by herpes simplex can occur in the corner of the mouth and be mistaken for angular cheilitis of another cause.

  8. Cheilitis - Wikipedia

    en.wikipedia.org/wiki/Cheilitis

    Photographic Comparison of: 1) a canker sore – inside the mouth, 2) herpes labialis, 3) angular cheilitis and 4) chapped lips. [4]Chapped lips (also known as cheilitis simplex [5] or common cheilitis) [6] is characterized by the cracking, fissuring, and peeling of the skin of the lips, and is one of the most common types of cheilitis.

  9. Frenulum of lower lip - Wikipedia

    en.wikipedia.org/wiki/Frenulum_of_lower_lip

    The inferior labial frenulum, or frenulum labii inferioris (Latin, meaning "little bridle of the lower lip"). is the frenulum connecting the lower gums with the lower lip. Function [ edit ]