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Anatomy of oral cavity

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ANATOMY OF
ORAL CAVITY

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1. Oral Vestibule
- lies between the gums and the teeth.
2. Oral Cavity Proper
- lies behind and within the arch of teeth.

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Oral Vestibule
Boundaries:
1. Anteriorly by the lips,
2. Laterally by the cheeks,
3. Superiorly by the
mucolabial and
muco...

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Anatomy oral cavity
Anatomy oral cavity
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Anatomy of oral cavity

  1. 1. ANATOMY OF ORAL CAVITY
  2. 2. 1. Oral Vestibule - lies between the gums and the teeth. 2. Oral Cavity Proper - lies behind and within the arch of teeth.
  3. 3. Oral Vestibule Boundaries: 1. Anteriorly by the lips, 2. Laterally by the cheeks, 3. Superiorly by the mucolabial and mucobuccal folds, and 4. Posteriorly and medially by the teeth and gums.
  4. 4. Boundaries: 1. Anteriorly and laterally by the teeth and gums, 2. Superiorly by the palate (hard and soft), 3. Inferiorly by the tongue and the floor of the mouth, and 4. Posteriorly by the opening into the pharynx.
  5. 5. Characteristics: 1. Anterior 2/3 of the tongue, 2. Lingual frenulum, 3. Lingual vein, 4. Sublingual caruncle, 5. Sublingual folds 6. Fimbriated fold
  6. 6. BLOOD SUPPLY Mouth is supplied by branches from  Facial Artery  Inferior Alveolar Artery  Maxillary Artery  Infraorbital Artery  Postero superior alveolar arteries
  7. 7. Lymphatic Supply
  8. 8. PALATE The palate forms the superior wall or the roof of the oral cavity proper. It is composed of the hard palate which has an osseous base, and behind, a soft palate composed of fibrous tissue.
  9. 9. SOFTPALATE Tensor veli palatini Tenses the soft palate; opens the pharyngotympanic tube Levator veli palatini Only muscle to elevate the soft palate above the neutral position Palatopharyngeus Depresses soft palate; moves palatopharyngeal arch toward midline; elevates pharynx Palatoglossus Depresses palate; moves palatoglossal arch toward midline; elevates back of the tongue Musculus uvulae Elevates and retracts uvula; thickens central region of soft palate MUSLE FUNCTION A. Tensor veli palatini muscles and the palatine aponeurosis. B. Levator veli palatini muscles. C. Palatopharyngeus muscles
  10. 10. Blood supply of Soft palate
  11. 11. VENOUS DRAINAGE AND LYMPHATICS
  12. 12. NERVESUPPLYOFPALATE • All muscles of soft palate are supplied by Vagus nerve [X] via pharyngeal branch to pharyngeal plexus • Except Tensor palatini muscle which is supplied by Mandibular nerve. • Sensory supply is derived from lesser palatine branches of the sphenopalatine ganaglion and from the branches of glossopharyngeal nerve. • Secretomotor from Suprior salivary N. through greater petrosal nerve
  13. 13. tongue “A mobile mass of muscles lying on the floor of the mouth and associated with the function of taste, chewing, swallowing, and speaking”. TONGUE CONSISTS OF • Mucous membrane • Mucous glands • Lymphoid tissue • Fat • Striated muscle fibres • Fibrous tissue
  14. 14. PAPILLAE  Circumvallate papillae are arranged in a row parallel to and in front of sulcus terminalis  Fungiform papillae are numerous at the tip and margin of the tongue.  Filliform papillae are prevalent on the dorsum of the tongue arranged in rows parallel to sulcus terminalis
  15. 15. Muscles of the tongue INTRINSIC MUSCLES MUSCLE FUNCTION SUPERIOR Shortens tongue; curls apex and sides of tongue INFERIOR Shortens tongue; uncurls apex and turns it downward TRANSVERSE Narrows and elongates tongue VERTICAL Flattens and widens tongue All intrinsic muscles are supplied by Hypoglossal nerve
  16. 16. EXTRINSIC MUSCLES GENIOGLOSSUS Protrudes tongue; depresses center of tongue
  17. 17. HYOGLOSSUS Depresses tongue
  18. 18. STYLOGLOSSUS Elevates and retracts tongue
  19. 19. PALATOGLOSSUS Depresses palate; Moves palatoglossal fold toward midline; Elevates back of the tongue
  20. 20. Arteries:  Lingual artery  Tonsillar branch of facial artery  Ascending pharyngeal artery Veins:  Lingual vein, ultimately drains into the internal jugular vein Hypoglossal nerve Lingual artery & vein Deep lingual vein Dorsal lingual artery & vein
  21. 21. BLOOD AND NERVE SUPPLY
  22. 22. Tip: • Submental nodes bilaterally & then deep cervical nodes Anterior two third: • Submandibular unilaterally & then deep cervical nodes Posterior third: • Deep cervical nodes (jugulodigastric mainly)
  23. 23. NERVE SUPPLY OF TONGUE
  24. 24. REFERENCE  Textbook of Ear, Nose, Throat and Head & Neck Surgery Clinical and Practical 3rd Edition By : P. Hazarika , D.R . Nayak, R. Balakrishnan  Gray’s Anatomy for Students 2nd edition By : Richard L Drake , A Wayne Vogl , Adam W M Mitchell
  25. 25. THANKYOU

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