Oral Mucosa

Question 1

_____________ lines oral cavity, palate, tongue, alveolar bone

Answer 1

Oral mucosa

Question 2

_____________ separates epithelium and lamina propria

Answer 2

Basal lamina

Question 3

_______ granules are deeply stained granules in cytoplasm of cells in granular layer

Answer 3

Keratohyalin

Question 4

does oral mucosa have Langerhans cells?

Answer 4

NO

Question 5

what are the 2 layers of oral mucosa?

Answer 5

1. Stratified squamous epithelium
2. Lamina propria

Question 6

what are the 3 types of stratified squamous epithelium? what makes then different?

Answer 6

1. Keratinized: seen where there is abrasion, no nuclei in surface cells
2. Nonkeratinized: nuclei in surface cells
3. Parakeratinized: transition bw non-keratinized → keratinized, some surface cells with nuclei, some without

Question 7

which stratified squamous epithelium has no submucosal layer and larger rete pegs?

Answer 7

keratinized

Question 8

which layer has blood vessels?

Answer 8

Lamina propria

Question 9

what can the lamina propria be broken down into?

Answer 9

• papillary layer
• Reticular layer

Question 10

where can submucosa be found? Is it always present?

Answer 10

• underneath lamina propria
  -Submucosa may or may not be present

Question 11

what can be found in submucosa layer?

Answer 11

glands / fat

Question 12

what are the layers of oral mucosa in an area of the mouth that experiences a lot of abrasion from furthest outside –> inside?

Answer 12

keratinized layer → granular → prickle cell layer → basal cell layer → basement membrane → papillary layer → Dense fibrous layer → Submucosa

Question 13

what layer are dividing cells found in?

Answer 13

basal cell layer

Question 14

what are the 3 major classifications of oral mucosa?

Answer 14

1. Lining
2. Masticatory
3. Speecialized

Question 15

Where can Lining oral mucosa be found? what type of epithelia is it?

Answer 15

-Lips, cheeks, floor of mouth, alveolar bone, soft palate, ventral tongue
- non-keratinized stratified squamous

Question 16

where is masticatory oral mucosa found? what type of epithelia is it?

Answer 16

• Gingiva and hard palate/Where there is a lot of friction
• keratinized stratified squamous

Question 17

what are all of the different examples of masticatory oral mucosa? (5)

Answer 17

1. Free/Marginal gingiva
2. Attached gingiva
3. Interdental papilla
4. Col
5. Hard palate

Question 18

what are the boundaries of free gingiva?

Answer 18

Gingival margin (coronally), free gingival groove (apically), gingival sulcus (inner aspect), vestibule and oral cavity (outer aspect)

Question 19

what is the histology of free gingiva like?

Answer 19

-Long, thin epithelial rete pegs
-keratinized stratified squamous (but can sometimes be para or even non-keratinized)

Question 20

_________ epithelium is that epithelium which exists on the sulcular side of the free gingival margin and is usually __________ stratified squamous epithelium that lacks _________

Answer 20

Sulcular
non-keratinized
pronounced rete ridges

Question 21

what are the boundaries of attached gingiva?

Answer 21

-free gingival groove (coronally), mucogingival junction (apically)

Question 22

Attached gingiva is __________ stratified squamous epithelium that shows stippling. It has much ________ contact with underlying CT than lining mucosa

Answer 22

Keratinized
much MORE contact

Question 23

what is this an example of?

Answer 23

attached gingiva

notice how deep the rete pegs are, allowing more contact with the underlying CT

Question 24

__________ occupies the embrasure between teeth subjacent (below) to the interdental contact area

Answer 24

Interdental papilla

Question 25

what is the epithelium of Interdental papilla like?

Answer 25

Keratinized stratified squamous epithelium

Question 26

_____ is the concave tissue between the peaks of the interdental papilla

Answer 26

Col

Question 27

what type of epithelium of Col like?

Answer 27

non-keratinized stratified squamous

Question 28

what are the different divisions of oral mucosa of the Hard palate? (4)

Answer 28

1. Palatine/Median raphe 2. Anterior region 3. Anterolateral area 4. Posterolateral area

Question 29

____________ is the lengthwise ridge of mucosa along the midline

Answer 29

Palatine/Median Raphe

Question 30

what is the histology of Palatine raphe like?

Answer 30

keratinized stratified squamous

Question 31

___________ is when lamina propria attaches directly to the underlying bone; NO mucosa

Answer 31

Mucoperiosteum

Question 32

what is the histology like for the anterior region of the soft palate? Does it have mucoperiosteum?

Answer 32

- keratinized strat squamous - yes

Question 33

__________ are transverse ridges of mucosa; these do NOT cross median raphe

Answer 33

Rugae

Question 34

___________ are dense CT remnants of nasopalatine ducts

Answer 34

Incisive papilla

Question 35

what is the histology like for the Anterolateral area of hard palate? Submucosa is present here and contains _________

Answer 35

keratinized stratified squamous adipose CT

Question 36

what is the histology like for the POsterolateral area of the hard palate? Submucosa is present here and contains _________--

Answer 36

Keratinized or Parakeratinizd strat sq. Minor salivary glands

Question 37

what is the only type of Masticatory oral mucosa that has nonkeratinized strat squamous epithelium?

Answer 37

Col

Question 38

_____________ is epithelium beneath the anatomical sulcus. what makes this unique?

Answer 38

Junctional epithelium One of the ONLY areas in the body where you have an epithelium with basal lamina on both sides

Question 39

what joins the sides of junctional epithelium?

Answer 39

desmosomes and hemidesmosomes

Question 40

what is the histology of junctional epithelium?

Answer 40

nonkeratinized stratified squamous

Question 41

where can specialized oral mucosa be found? what is its histology?

Answer 41

dorsal surface of tongue may be keratinized or nonkeratinized

Question 42

what are the different types of papillae on the tongue? (4)

Answer 42

1. Filliform 2. Fungiform 3. Circumvallate 4. Foilate

Question 43

___________ papillae are the most common, don't have taste buds, and give the tongue a rough surface

Answer 43

Filliform

Question 44

_________ papillae are mushroom shaped and are scattered over the anterior tongue

Answer 44

Fungiform

Question 45

___________ papillae are found along sulcus terminalis and are the largest in size. where are the taste buds on these found?

Answer 45

circumvallate lateral surface

Question 46

__________ papillae have parallel ridges with furrows and are located on the posterolateral border. where are the taste buds loated on these?

Answer 46

Foliate within furrows, but they are smaller than circumvallate

Question 47

what type of papillae is shown here?

Answer 47

Filliform

Question 48

what type of papillae is shown here?

Answer 48

Fungiform

Question 49

what type of papillae is shown here?

Answer 49

circumvallate

Question 50

what type of papillae is shown here?

Answer 50

Foilate (taste buds within furrows on side but smaller than circumvallate)

Question 51

what is this a scan of?

Answer 51

taste bud

Question 52

______________ is the transition area between skin and oral mucous membrane

Answer 52

Mucocutaneous junction (lips)

Question 53

______________ is the line separating vermillion zone and skin

Answer 53

Vermillion border (border of lips)

Question 54

___________ is Very thin, keratinized epithelium with Long CT papillae

Answer 54

Vermillion zone (lips)

Question 55

___________ is between vermilion zone and labial mucosa. what type of epithelium is this?

Answer 55

Intermediate zone parakeratinized strat sq.

Question 56

_____________ are serous salivary glands, what makes them unique?

Answer 56

Von ebners ONLY example of serous minor glands in the mouth