Oral Mucosa

Question 1

what are the 2 basic types go tissue in the oral mucosa?

Answer 1

epithelial

connective tissue

Question 2

what are the functions of oral mucosa?

Answer 2

protection
sensation
secretion

Question 3

what is the name of the junction between the alveolar mucosa and the attached gingiva?

Answer 3

mucogingival junction

Question 4

what is the name of the groove surrounding the teeth?

Answer 4

free gingival groove

Question 5

what type of mucosa is a buccal injection given into and what does this mean for patient & pain?

Answer 5

buccal injection into lining mucosa which is flexible and can therefore be pain free for the patient if done properly

Question 6

what type of mucosa is a palatal injection given into and what does this mean for patient & pain?

Answer 6

into masticatory mucosa which is tightly bound down and can be painful for the patient

Question 7

from top to bottom, what are the layers of non-keratinised lining mucosa?

Answer 7

1 epithelium
2 lamina propria
3 submucosa
4 bone/muscle

Question 8

3 distinguishing characteristics of non-keratinised lining mucosa?

Answer 8

• few rate pegs
• lamina propria and submucosa
• no muscular mucosa

Question 9

what 2 things do all epithelial cells have?

Answer 9

filaments

desmosomes

Question 10

what are the 4 layers in the epithelial and lamina propria of non-keratinised lining mucosa?

Answer 10

1-superficial layer
2-intermediate layer
3-prickle cell layer
4-basal cell layer

Question 11

describe the superficial layer of non-keratinised lining mucosa

Answer 11

• flattened cells
• nuclei persist
• not dehydrated => flexible

Question 12

describe the intermediate layer of non-keratinised lining mucosa

Answer 12

• membrane coating granules (MCGs) discharge contents between cells
• permeability barrier
• not wholly effective

Question 13

what is the permeability barrier of the intermediate layer of non-keratinised lining mucosa?

Answer 13

GTN spray to treat angina absorbed sublingually

Question 14

describe the prickle cell of non-keratinised lining mucosa

Answer 14

-membrane coating granules (MCGs)

Question 15

describer the basal cell layer of non-keratinised lining mucosa

Answer 15

• least differentiated

- mitosis often visible

Question 16

from top to bottom, what are the layers of of keratinised masticatory mucosa?

Answer 16

1-epithelium
2-lamina propria
3-periostium
4-bone

Question 17

what re the 2 layers in the lamina propria of keratinised masticatory mucosa?

Answer 17

papillary layer

reticular layer

Question 18

3 characteristics of keratinised masticatory mucosa?

Answer 18

• many rete pegs and papillae
• thick LP which is firmly attached to bone
• resistant to compression

Question 19

what are the 4 layers in the epithelium of keratinised masticatory mucosa?

Answer 19

1-keratinised layer
2-granular layer
3-prickle cell layer
4-basal cell layer

Question 20

describe the keratinised layer of keratinised masticatory mucosa

Answer 20

• flattened cells “squares”
• no organelles
• contain filled with keratin
• dehydrated - non flexible

Question 21

describe the granular layer of keratinised masticatory mucosa

Answer 21

• keratohyaline granules

- membrane coating granules (MCGs) discharge contents sealing cells together creating an effective permeability barrier

Question 22

cells beyond the granular cell layer are what and why??

Answer 22

dead due to the MCGs creating an effective permeability barrier

Question 23

what are ‘clear cells’ called?

Answer 23

non-keratinocytes

Question 24

give the 4 types of non-keratinocytes

Answer 24

merkel cells
melanocytes
langerhan’s cells
inflammatory cells

Question 25

what are non-keratinocytes are in the basal layer?

Answer 25

Merkel cells and melanocytes

Question 26

what non-keratinocytes are found supra-basally?

Answer 26

langerhan’s cells and inflammatory cells

Question 27

from top to bottom, what are the 3 layers in specialised mucosa?

Answer 27

• epithelium
• lamina propria
• muscle

Question 28

where is specialised mucosa found?

Answer 28

on the tongue

Question 29

what are the 4 types of taste buds/papillae?

Answer 29

filiform
foliate
fungiform
circumvallate

Question 30

where are filiform papillaefound?

Answer 30

anterior part of the tongue

Question 31

describer the structure of filiform papilla?

Answer 31

• cone shaped
• connective tissue core
• keratinised epithelial cover
• non-keratinised epithelium in between

Question 32

where are fungiform papillae found?

Answer 32

anterior part of tongue

Question 33

describe the structure and innervation of fungiform papillae

Answer 33

facial nerve
clinically appear as red spots
200 found on tongue

Question 34

where are foliate papillae found?

Answer 34

lateral margin of posterior aspect

Question 35

describe the innervation and structure of foliate papillae

Answer 35

anteriorly = facial
posteriorly = glossopharyngeal
4-11 parallel ridges
120 taste buds per papilla

Question 36

where are circumvallate papillae found?

Answer 36

anterior to sulcus terminal

Question 37

describe the innervation and structure of circumvallate papillae

Answer 37

glossopharyngeal
3-13 papillae on tongue
250 taste buds per papilla

Question 38

explain the importance of saliva

Answer 38

• essential for normal taste

- solvent and transport

Question 39

give the 4 types of cells in taste buds

Answer 39

dark cells
light cells
receptors
precursors

Question 40

which 2 of 4 papilla are the only ones to have accessory minor von ebner salivary glands?

Answer 40

foliate and circumvallate

Question 41

which 1 of 4 papilla don’t have taste buds?

Answer 41

filiform