The document discusses the anatomy of the oral cavity and oropharynx. It describes the skeletal framework including the hard and soft palates and teeth. It discusses the mucous membranes, sensory and motor innervation, and glands of the oral cavity. It provides details on the innervation of teeth, tongue, and muscles of the oropharynx. Key structures mentioned include the palatine tonsils, palatopharyngeus, palatoglossus, tensor veli palatini, and levator veli palatini muscles.

1. ORAL CAVITYORAL CAVITY
Upload By : Ahmed Ali AbbasUpload By : Ahmed Ali Abbas
Babylon University College of DentistryBabylon University College of Dentistry
download this file from Website on Googledownload this file from Website on Google
TheOptimalSmile.wix.comTheOptimalSmile.wix.com
choose Lectureschoose Lectures
Then Second StageThen Second Stage
Then choose the lecture you needThen choose the lecture you need

3. Skeletal FrameworkSkeletal Framework
• Hard palate:
Anterior two-thirds of palate.
Palatine folds of maxillae.
Palatines.
• Soft palate:
Posterior third of palate.
Fibromuscular fold.
• Teeth:
Maxillary.
Mandibular.

9. Mucous MembranesMucous Membranes
• Vestibule:
Between lips/cheeks and gums/teeth.
Leads to:
Oral cavity proper.
Receives:
Parotid duct:
Opposite upper second molar.

13. Mucous MembranesMucous Membranes
• Oral cavity:
Bounded by:
Teeth and gums.
Hard/soft palates.
Leads to:
Pharynx (oropharynx).
• Uvula

20. Sensory Innervation of MucousSensory Innervation of Mucous
MembranesMembranes
• CN V-2:
Greater and lesser palatine nerves.
Nasopalatine nerves.
• CN V-3:
Lingual nerve:
Floor of mouth.
Buccal nerve:
Vestibule and cheek.

21. Motor Innervation to MucousMotor Innervation to Mucous
Membranes/GlandsMembranes/Glands
• Sympathetics:
See nasal cavity.
• Sublingual and submandibular glands:
Parasympathetics:
From:
Superior salivatory nucleus via CN VII.
To:
Submandibular/sublingual ganglion.
To:
Submandibular and sublingual glands.

22. Motor Innervation to MucousMotor Innervation to Mucous
Membranes/GlandsMembranes/Glands
• Parotid gland:
Parasympathetics:
From:
Inferior salivatory nucleus via CN IX.
To:
Otic ganglion.
To:
Parotid gland.

23. Innervation of TeethInnervation of Teeth
• Maxillary teeth:
Superior alveolar branches of CN V-2.
• Mandibular teeth:
Inferior alveolar branches of CN V-3.

24. Innervation of TongueInnervation of Tongue
• General sensory:
Anterior two-thirds:
CN V-3 via lingual nerve.
Posterior one-third:
CN IX.

25. Innervation of TongueInnervation of Tongue
• Taste:
Anterior two-thirds:
CN VII via chorda tympani.
Posterior one-third:
CN IX.

27. TongueTongue
• Tongue is a mass of skeletal muscles covered
by mucosa.
• Location:
Anterior two-thirds in oral cavity proper.
Posterior third in oropharynx.
• Sulcus terminalis.
• Foramen cecum.
• Frenulum.
• All intrinsic and extrinsic muscles of the tongue
are innervated by CN XII.

45. OropharynxOropharynx
• Extends:
From:
Soft palate above.
To:
Upper border of epiglottis below.
• Lies at level of second and third cervical
vertebrae.

46. OropharynxOropharynx
• Contains:
Palatine tonsils:
Encapsulated.
Tonsilar branch of facial artery.
Glossopharyngeal nerve.

47. OropharynxOropharynx
• Palatopharyngeus muscle:
Posterior border of hard palate to fascia on
lateral and posterior wall of pharynx and
thyroid cartilage.
Elevates pharynx during swallowing.
Vagus nerve (pharyngeal plexus).

48. OropharynxOropharynx
• Palatoglossus muscle:
From soft palate to lateral surface of
posterior tongue.
Depresses palate.
Vagus nerve (pharyngeal plexus).

49. OropharynxOropharynx
• Tensor veli palatini:
From scaphoid fossa of sphenoid bone and
cartilaginous part of auditory tube to soft
palate.
Tenses soft palate.

50. OropharynxOropharynx
• Levator veli palatini:
From petrous temporal bone and
cartilaginous part of auditory tube to soft
palate.
Elevates soft palate.
• Uvula