Salivary Glands

Question 1

Major Salivary Glands and secretions

Answer 1

• Parotid gland and duct
  
  • 25-30%
  • Serous saliva
    
    • Highest amylase
• Sublingual
  
  • 3-5%
  • Serous and mucous saliva (mainly mucous)
    
    • Lowest amylase
• Sunmandibular gland
  
  • 60-70%
  • Srous and mucous, (mainly serous)

Question 2

List some minor salivary glands

6

Answer 2

• Von Ebner
  
  • At base of circumvallate papilla on the tongue
  • Serous saliva
• Anterior lingual
• Labial
• Palatine
• Buccal
• Glossopalatine

Question 3

Minor glands

genera

Answer 3

• Not encapsulated by CT
• Contribute to oral fluid
• Primarily mucous secretions except Von Ebner

Question 4

Salivary glands arterial supply

Answer 4

• All are supplied by ECA
• Parotid
  
  • Glandular branches of superficial temporal and tranverse facial a.
• Submandibular
  
  • Glnadular branches of facial (submental a.)
• Sublingual gland
  
  • Glandular branches of lingual a (sublingual a)

Question 5

Lymphatic drainage of salivary glands

Answer 5

• Parotid
  
  • Parotid nodes
  • Superior deep cervical nodes
• Submandibular and sublingual
  
  • Submandibular nodes
  • Deep cervical nodes

Question 6

Submandibular Gland

Size and shape

Answer 6

• second largest
• Hook shaped, wraps around posterior border of mylohyoid muscle

Question 7

Submandibular gland

Supeprficial portion

Answer 7

• Sits in submandibular fossa in submandibular triangle
• Surrounded by investing fascia
• Facial a. passes between submand gland and mandible before giving off submental a.

Question 8

Submandibular gland

Deep portion

Answer 8

• Lies in oral cavity between the hyoglossus muscle and mandible
• Ends at sublingual gland

Question 9

Submandibular Duct

AKA

Where is it and where does it enter oral cavity

Innervation

Answer 9

• AKA Whartons duct
• Lies along sublingual gland
• Enters oral cavity at the sublingual papilla
• Lingual nerve from V3, loops under duct
• Innervated by CN 7 by chorda tympani and submandibular ganglon

Question 10

Sublingual Glnad

Shape

Location

Innervation

Creates

Duct

Answer 10

• Almond shaped
• Located lateral to submandibular duct, between sublingual fossa of mandible and genioglossus m
• Associated with lingual n of V3
• Innervated by VII (via chorda tympani and submandibular ganglion)
• Creates sublingual fold of oral cavity
• Sublingual (Bartholins or Rivinus) ducts
  
  • Drains via numerous small ducts

Question 11

Parotid Gland

Size

Location

Shape

Answer 11

• Largest
• Lies in parotid bed/region
  
  • Extends down to lower border of mandible and up to zygomatic arch
  • 75% covers part of SCM and masseter
    
    • 25% is retromandibular
• Pyramidal in shape, with up to 5 extensions

Question 12

Parotid gland

What passes through

Answer 12

• Facial nerve, ECA, and retromandibular vein pass through parotid
  
  • Facial n splits parotid into a superficial and deep lobe, connected by an isthmus

Question 13

Parotid Duct

AKA

Location

Opens

Innervation

Answer 13

• AKA Stensens Duct
• Deep lobe of parotid gland
• Superficial to masseter
• Pierces buccinator
• Opens into oral cavity near 2nd maxillary molar
• Innervated by CN IX, via otic ganglion

Question 14

Facial Nerve

Answer 14

• Enters internal acoustic meatus
• Geniculate ganglion
• Passes through facial canal
• Exits stylomastoid foramen
• Enters parotid fossa, passing btw stylohyoid m and post digastric
• Splits the parotid gland into superficial and deep lobes
• While in parotid divides into terminal branches
  
  • To zanzibar by motor car

Question 15

Major structures of Parotid Bed

Answer 15

• Parotid gland
• Parotid duct
• Facial nerve
  
  • exits stylomastoid foramen
  • Gives rise to post auricular n
  • Enters bed btw stylohyoid m and post digastric

Question 16

Arterial supply to parotid bed

Answer 16

• ECA
  
  • Posterior aurivular a
  • Maxillar a (terminal branch)
  • Superficial temporal a (terminal branch)
    
    • Tranverse facial

Question 17

Arterial supply to parotid bed

Paths

Answer 17

• ECA
  
  • Enters parotid gland
  • Gives branches to gland and post auricular a.
  • While in gland branches into 2 terminal branches
• Post auricular a.
  
  • Passes superiorly to mastoid process and cartilage of ear
• Maxillary a
  
  • Exiting parotid passes superior or deep to lateral pterygoid muscle
• Superficial temporal a
  
  • Begins posterior to neck of mandible, travels superiorly
• Tranverse facial a
  
  • Passes trnaversely to exit the gland
  • Passes immediately superior to parotid duct

Question 18

Venous drainage of parotid bed

Answer 18

• Posterior auricular v.
• Maxillary v.
• Superficial temporal v.
• Tranverse facial v.
• Retromandibular v.
  
  • Formed in parotid gland when the superficial temporal and maxillary v join

Question 19

Innervation of parotid bed

Answer 19

• Sensory
  
  • Auriculotemporal from V3
  • Great auricular from cervical plexus
• Parasympathetic motor
  
  • Via otic ganglion and lesser petrosal of CN IX
• Sympathetic motor
  
  • Superior cervical ganglion
  • Follow arteris that supply parotid