Oral mucosa

Question 1

functions of oral mucosa

Answer 1

protection
sensation
thermal regulation
secretions

Question 2

2 parts of oral cavity

Answer 2

vestibule bounded by lips and cheeks

and oral cavity which is separated from the vestibule by alveolar bone and gingiva

Question 3

types of oral mucosa

Answer 3

lining
masticatory
specialized

Question 4

% of each type of mucosa

Answer 4

60% IS Lining
25% Masticatory
15% specialized

Question 5

the coloration depends on

Answer 5

the number of vessels and their dilation in underlying connective tissue
amount of melanin pigment present
degree of keratinization
thickness of epithelium

Question 6

sebaceous glands are found in?

Answer 6

upper lip, buccal mucosa and in about 3 quarters of adults in masticatory mucosa and dorsum of the tongue

Question 7

sebaceous appear as yellow spot known as

Answer 7

Fordyce’s spot

Question 8

what present on the dorsum of the tongue and hard palate

Answer 8

papillae and transverse ridges (Rugae) respectively

Question 9

two main tissues of oral mucosa

Answer 9

stratified squamous epithelium

and lamina propria (underlying connective tissues)

Question 10

what separates the oral mucosa from the underlying muscle or bone in lips cheeks hard palate

Answer 10

a lose fatty or glandular connective tissue containing major blood vessels and nerves

Question 11

mucoperiosteum

Answer 11

the oral mucosa such as gingiva and hard palate is directly attached to periosteum known as

Question 12

waldeyers ring

Answer 12

largest accumulation of lymphoid tissues are found in posterior part of oral cavity
(lingual, palatine and pharyngeal)

Question 13

2 Functional populations of epithelium cells of oral mucosa

Answer 13

progenitor population (that divide and provide new cells)
maturating population ( that continually mature and differentiate)

Question 14

cell turnover

Answer 14

the time taken for a cell to divide and pass though the entire epithelium is known as turnover rate

Question 15

skin turnover time

Answer 15

52 to 75 days

Question 16

gut turn over time

Answer 16

4 to 14 days

Question 17

gingiva turn over time

Answer 17

41 to 57 days

Question 18

cheek turn over time

Answer 18

25

Question 19

turn over rate is faster in

Answer 19

non keratinized epithelium such as the buccal mucosa rather than the gingiva

Question 20

keratinized epithelium what type of mucosa

Answer 20

masticatory and specialisez

Question 21

where is keratinized epithelium present

Answer 21

hard palate, gingiva, dorsum of the tongue

Question 22

each layer in keratinized epithelium and the shape of their cells

Answer 22

1. stratum basale ( cuboidal or low columnar)
2. stratum spinosum or prickle cell layer (elliptical or spherical cells)
3. stratum granulosam ( flattened cells)
4. startum corneum ( flat squamous cells) no nuclei

Question 23

ortho keratnized

Answer 23

startum corneum with no nuclei

Question 24

para keratinized

Answer 24

a variation of keratinized layer in which startum corneum have flattened nuclei called pyknotic nuclei

Question 25

why startum spinosum have prickled cells reason?

Answer 25

in histological preparatuon their cells shrink away remaining in contact with other cells through desmosomes.

Question 26

startum granulosum stains?

Answer 26

intensely with acid dyes ( hematoxylin) basophilic

Question 27

stratum granulosum contains?

Answer 27

granules called keratohyalin granules

Question 28

startum corneum stains

Answer 28

dark pink with eosin

Question 29

non keratinized epithelium is present in what mucosa

Answer 29

lining mucosa

Question 30

lining mucosa is present in

Answer 30

lips, buccal mucosa, alveolar mucosa, soft palate underside of the tongue, soft palate and floor of the mouth

Question 31

layers or non keratinized

Answer 31

first 2 layers are different | stratum intermedium in place of stratum granulosum and stratum superficiale

Question 32

clinical significance of turnover

Answer 32

the drugs target the cell in CANCER patients which have a high rate of turnover like the cells of hair and nails

Question 33

keratinocyte with small molecular weight

Answer 33

40kDa found in glandular and simple epithelium

Question 34

keratinocyte with intermediate molecular weight

Answer 34

found stratified epithelia

Question 35

keratinocyte with high molecular weight

Answer 35

65Kda is found in stratified keratinized epithelium

Question 36

non keratinocytes cell in oral epithelium

Answer 36

melanocytes langerhans cells lymphocyte Merkels cell

Question 37

location of each type of non keratinized cell

Answer 37

melanocyte is present in basal layer para basal langerhans are present in supra basal merkel cell is present in basal layer and lymphocytes are variable

Question 38

what are the only non dentritic non keratinocytes ?

Answer 38

merkels cells

Question 39

what cells have desmosomes for attahcment of adjacent cells

Answer 39

merkels cells

Question 40

where melanin pigment is most seen

Answer 40

gingiva, hard palate, tongue buccal mucosa

Question 41

causes of high activity of melanocytes

Answer 41

smoking genetically drugs high cortisone level

Question 42

melanin is synthesized within melanocytes as small structures called as

Answer 42

melanosomes

Question 43

person with heavy melanin pigment the cell containing melanin may be seen in

Answer 43

connective tissue which are usually macrophages that take up the melanosomes and are called melanophages

Question 44

one special characterstic about langerhan cells

Answer 44

rod shaped granule or tennis racket shaped granules which are called BIRBECK GRANULE

Question 45

langerhans cells are made in

Answer 45

bone marrow

Question 46

mucogingival junction

Answer 46

junction between attached gingiva and alveolar mucosa

Question 47

epithelium of attached and alveolar mucosa

Answer 47

attached gingiva has keratinized masticatory mucosa | alveolar mucosa has non keratinized lining epithelium

Question 48

space between tooth and gingiva and clinical significance

Answer 48

gingival sulcus (contains tartar and bacteria)

Question 49

what is present between free gingiva and attached gingiva

Answer 49

free gingival grove

Question 50

junctional epithelium

Answer 50

bewteen attached gingiva and tooth

Question 51

col

Answer 51

same as junctional epithelium and Replaced gradually by diving cell making more depression. interdental papillae have an outline of col non keratinized

Question 52

when the lingual frenum is short its called

Answer 52

Ankyloglossia (frenectomy)

Question 53

linea alba

Answer 53

whitish ridge on the buccal mucosa at the occlusal plane of the teeth which is keratinized