Anatomy of the oral cavity including lips, gums, tongue, floor of mouth and palate

1. BRI
Anatomy
of
oral cavity
BRIG ANWAR UL HAQ
03018513303

2. ORAL CAVITY
• The oral cavity extends from the lips to the
oropharyngeal isthmus, i.e. up to the level of
anterior pillar of tonsils.

3. PARTS

5. PARTS
• Lips
• Buccal or cheek mucosa
• Gums (gingivae)
• Retromolar trigone
• Hard palate
• Oral tongue
• Floor of mouth

6. Lips
• They form anterior boundary of the oral
vestibuIe.

7. Lymphatic Drainage of lips
• Lower:
– Medial portion of lower lip drains into
• submental
– lateral portion
• submandibular nodes.
• Upper:
– Preauricular
– infraparotid
– submandibular

8. BUCCAL OR CHEEK MUCOSA
• It lines the inner surface of cheeks and lips
• Extends up to
– pterygomandibular raphe
– Anteriorly, it extends to the meeting line of lips.

9. BUCCAL MUCOSA
• Submental
• Submandibular

10. Gums (gingivae)
• They surround the teeth and cover the upper
and lower alveolar ridges.

11. Oral Vestibule
Boundaries:
1. Anteriorly - lips
2. Laterally -cheeks
3. Superiorly -
Mucolabial
Mucobuccal folds
4. Posteriorly
&medially by the
teeth and gums.

12. Lymphatic Drainage of Gums
• Buccal aspect of mucosa
– Submental
– Submandibular
• Lingual aspect of upper alveolus
– Upper deep cervical
– Lateral retropharyngeal nodes.
• Lingual aspect of lower alveolus
– Submandibular

13. RETROMOLAR TRIGONE
• Triangular area of mucosa covering anterior
surface of the ascending ramus of mandible.
• Base
– Posterior to the last molar while
• Apex
– Adjacent to the tuberosity of maxilla

14. HARD PALATE
• It forms roof of the oral cavity.

15. VENOUS DRAINAGE AND LYMPHATICS

16. ORAL TONGUE
• Only anterior 2/3 –
– included in the oral cavity.
• Posterior 1/3
– Base of tongue is situated behind the circumvallate
• Papillae and forms part of the oropharynx.
• Oral Tongue is divided into
– Tip
– lateral borders
– Dorsum
– Undersurface.

17. BLOOD AND NERVE SUPPLY

18. Tip:
• Submental nodes
bilaterally & then
deep cervical nodes
Anterior two third:
• Submandibular
unilaterally & then
deep cervical nodes
Posterior third:
• Deep cervical nodes
(jugulodigastric
mainly)

19. FLOOR OF MOUTH
• Crescent-shaped area between
– Gingivae
– Undersurface of tongue
• Anterior portion of the floor
– Best seen when patient raises the tip of tongue to
touch the hard palate. Frenulum and sublingual
papillae with openings of submandibular ducts can
be eas ily seen.
• Lateral portion of floor of mouth
– Best seen by displacing the lateral surface of tongue
in medial direction with the help of a tongue
depressor

20. Floor of Mouth-Lymphatic Drainage
• . Anterior portion of floor of mouth
–Submandibular nodes.
–also cross the midline.
• Posterior portion
–Upper deep cervical nodes.