Anatomy (Internal Organs+Glands) · MU Sofia

54. Oral cavity.

Covers the boundaries of the oral cavity, then splits it into the oral vestibule and the oral cavity proper, describing each region's borders in turn. The vestibule section details the lips and cheeks, including their muscles and coverings, and the internal borders formed by teeth and gums. It ends with a listed set of vestibule landmarks, including the parotid duct opening, the labial frenula, the maxillary tuberosity and the fornix, with several pictures marking these structures.

Inside: 4 sections · 4 labelled pictures · 10 flashcards · 1 min

Topic 2 of 44 in the MU Sofia syllabus for Anatomy (Internal Organs+Glands) (Medicine, Years 1 and 2). The free AceMed note covers it in 4 sections, about 167 words (1 min of reading), with 10 flashcards.

In this note

  1. ORAL CAVITY
  2. Boundaries :
  3. The oral cavity proper
  4. The oral vestibule:

Boundaries :

  • Ventrally : lips
  • Laterally : cheeks
  • Floor : oral diaphragm
  • Roof : palate
  • Dorsally : continuous with the pharanyx
  • The dental arches divide the oral cavity into the:
  1. 1. the oral vestibule
  2. 2. the oral cavity proper

The oral cavity proper

Borders:

  • Anterior and lateral:
  • Alveolar processes
  • Gum
  • Superior border : (concave)
  • Hard palate
  • Soft palate
  • Inferior border :
  • Tongue
  • Mylohyoid m., Ant. belly of digastric m., Geniohyoid m.
  • Posterior border: Continuous into the pharynx through oropharyngeal isthmus.

The oral vestibule:

  • External borders :
  • lips : 2 fleshy folds surrounding the oral orifice they accommodate orbicularis oris muscle. they contain nerves, vessels & glands.
  • cheeks : they are continuous with lips at nasolabial grooves.
  • Their muscle is buccinator
  • Internally they are lined by mucos membrane.
  • Externally they are covered by skin, buccal pad of fat, and buccopharyngeal fascia
  • Internal borders:
  • Teeth
  • Gums

The vestibule contains the following:

  1. 1 - Opening of the parotid duct.
  2. 2 - Superior labia frenulum
  • connect sup. lip to the gum
  1. 3. Inferior labia frenulum.
  2. 4. Maxillary tuberosity
  3. 5. Fornix

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