The document discusses the anatomy of the oral cavity. It describes the key structures as including the lips, teeth, gums, hard and soft palates, tongue, floor of the mouth, and vestibule. The oral cavity can be divided into the vestibule and oral cavity proper. The vestibule is the slit-like space bounded by the lips, cheeks, gums and teeth. The oral cavity proper contains the alveolar arches, teeth, gums and palate. The document outlines the structures and functions of these various regions and features of the oral cavity.

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ORAL CAVITY: GROSS ANATOMY
JANUARY, 2020
OBAJE GODWIN SUNDAY
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2. INTRODUCTION
Oral cavity are as follows:
Lips, gingivae, retromolar trigone, teeth, hard
palate, cheek mucosa, mobile tongue, and floor of
the mouth
Salivary glands are are not part of the oral cavity
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3. 2 PORTIONS OF THE ORAL CAVITY
Vestibule: Cleft between the lips and cheeks
(external) and the gums and teeth (internal)
Oral cavity proper: Alveolar arches, teeth and
gums, and palate and tongue
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4. ORAL CAVITY: 2 PORTIONS
Lips Cheeks
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5. ORAL CAVITY: 2 PORTIONS
Vestibule Hard palate
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6. PALATE
Is the roof of the mouth in humans and other mammals
It separates the oral cavity from the nasal cavity
A similar structure is found in crocodilians, but in most
other tetrapods, the oral and nasal cavities are not truly
separated
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7. HARD PALATE
Superiorly by respiratory mucosa (ciliated
pseudostratified columnar epithelium)
Inferiorly by oral mucosa (stratified squamous
epithelium).
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8. SOFT PALATE
Valve-like in closing the oropharyngeal isthmus
Elevate and separate nasopharynx from the
oropharynx.
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9. RETROMOLAR TRIGONE (RTR)
Is a triangular region covered by gingival mucosa and is
positioned between the lower third molar and the
ascending ramus of the mandible.
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10. ORAL CAVITY: 2 PORTIONS
Soft palate Uvula
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11. ORAL CAVITY
Palatoglossal arch Filiform papillae
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12. ORAL CAVITY
Fungiform
Circumvallate
papilae
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13. FOLIATE PAPILLAE
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14. MOUTH ANATOMY
ANATOMY OF THE MOUTH
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15. ANATOMICAL DEFINITION
Consists of two regions, the vestibule and the oral
cavity proper
Mouth is moist, lined with a mucous membrane, and
contains the teeth
The lips mark the transition from mucous membrane to
skin, which covers most of the body
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16. FUNCTION OF THE VESTIBULE
Vestibulum oris is a slit-like space, bounded externally
by the lips and cheeks
Internally by the gums and teeth
It communicates with the surface of the body by the
rima or orifice of the mouth
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17. FLOOR OF THE ORAL CAVITY
Muscular diaphragm: contains mylohyoid muscles that
1. Provides structural support to the floor of the mouth
2. Pulls the larynx forward during swallowing
Geniohyoid muscles helps in pulling the larynx forward
during swallowing
Tongue connects the floor by frenulum of the tongue, a
fold of oral mucosa
Salivary glands and ducts.
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18. TEETH
CROWN IS PART OF TOOTH
OPENS INTO ORAL CAVITY
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19. JAW AND TEETH HELD IN ORAL
CAVITY
Blood vessels and nerves run through the pulp of
the teeth
Cementum: A layer of connective tissue that binds the
roots of the teeth firmly to the gums and jawbone
Periodontal ligament: Tissue that helps hold
the teeth tightly against the jaw
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20. TOOTH AND ORGANS
Incisors and canine teeth are on meridians
that connect to the kidney, liver, and gallbladder
The meridians from bicuspids and molars are to the
large intestine and stomach
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21. 12 STANDARD MERIDIANS (TCM)
Yin meridians of the arm are Lung, Heart, and
Pericardium
Yang meridians of the arm are Large Intestine, Small
Intestine, and Triple Burner
Yin Meridians of the leg are Spleen, Kidney, and Liver.
The Yang meridians of the leg are Stomach, Bladder,
and Gall Bladder.
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22. TEETH
Central incisor Canine
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23. TEETH
Premolar 1-2 Molar 1-3
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24. CUSPID: THE POINTED PARTS OF
TOOTH
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25. INNERVATION
Sensory innervation: Branches of the trigeminal
nerve (CN V)
Hard palate: Greater palatine and nasopalatine
nerves, both of which are branches of the maxillary
nerve (CN V2)
Soft palate: Lesser palatine nerve, another branch of
the maxillary nerve
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26. INNERVATION CONT’D
Floor of the oral cavity: Sensory innervation from
the lingual nerve – a branch of the mandibular (V3)
division of the trigeminal nerve
Tongue: Special sensory fibres for taste from
the chorda tympani, a branch of the facial nerve (CN VII)
Cheeks: Buccal nerve, a branch of the mandibular
division of the trigeminal nerve
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27. CLINICALS
CHEWING
GUM…..GBOOO
ICE CREAM
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