Oral Mucosa

Front 1

Oral mucous membrane = oral mucosa

Oral mucoperiosteum (has a strong lamina propria)

4 functions of oral mucosa?

Back 1

Protection

Sensation

Taste

Secretion

Front 2

Organization - 3 types:

Masticatory

Lining

Specialized

Back 2

–Masticatory - gingiva & hard palate

–Lining - lips, cheeks, floor of mouth, under tongue, alveolar mucosa

–Specialized - red area of lip, dorsum of tongue

Front 3

Back 3

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Front 4

Components of oral mucosa:

Mucosa has what kind of epithelium?

Submucosa -loosely arranged irregular connective tissue , vessels, nerves, minor salivary glands, & occasional sebaceous glands

Either bound tightly (hard palate) orloosely (cheek

Back 4

Stratified squamous supported by lamina propria with irregular CT

•The junction between the submucosaand lamina propria is not distinct.

Front 5

What glands can be found in the oral mucosa and appear as yellow spots called Fordyce's granules?

Back 5

sebaceous glands

Front 6

Theinterface between the oral epithelium and the lamina propria is called the__ .

Note the interdigitationbetween connective tissue papilla and the epithelial ridges or __.

This increases the __ and increasesthe strength between the two

Back 6

Basal lamina

Rete pegs

Surface area

Front 7

Deepto submucosa in hard palate and gingiva is the __

Thistight attachment is characteristic of masticatory mucosa

Back 7

mucoperiosteum

Front 8

Epithelium of oral mucosa

can be what 3 things?

What cells attach to the underlying basal lamina?

Back 8

Non-keratinized (wet)

Keratinized (orthokeratinzed)

Parakeratinized (partially)

Basal layer of cells

Front 9

What are the 2 types of basal cells?

Back 9

Mitotic cells

Amplifying cells –increasethe number of cells that can mature

•TurnoverEstimates:

–Cheek~ 15 - 25 days

–Gingiva~ 40 - 50 days

–Gut~ 4 – 14 days

–Skin~ 52 – 75 days

Front 10

The next layer after the basal layer is the?

What is abundant in this layer?

Back 10

Spinous or prickle cell layer

abundantdesmosomes in the prickle cell layer

Front 11

After the spinous layer is the?

•Tonofilaments appear in bothkeratinized and non keratinized epithelia.

-Theseare intermediate filaments found in epithelia

- In keratinized epithelia thetonofilaments aggregate to form tonofibrils

- Innon-keratinized epithelia the tonofilaments remain dispersed

Back 11

Granular layer

–uppergranular layer and cornified layer appear in keratinized epithelium

–anintermediate and upper layer appear in non keratinized epithelium

Front 12

–Asthe lamellate granules or bodies reach the surface the lipids accumulate aroundthe plasma membrane.

Important in establishing a__

Back 12

Permeability layer

Front 13

•In keratinized epithelium__ appear.Give the basophilic appearance tothe granular layer

Back 13

keratohyaline granules

Front 14

•As cells reach the keratinizedlayer:

–Nucleidisappear

–Organellesdisappear

–Keratohyalingranules disappear

–Whats left are __ cross linked by disulfide bonds

Back 14

cells packed with filaments

Front 15

The superficial cells will have their corneodesmosomes break down they are called?

Back 15

Squames

Front 16

Keratinizedepithelium is impermeable except in the area __

Back 16

Under the tongue (non-keratinzed region to permit the absorption of some drugs)

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Back 17

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Front 20

Increase area for secure attachment

Greatest in masticatory mucosa where shearing forces are greatest

Back 20

CT junction

Hemidesmosomes and anchoring fibrils interlock CT and epithelium

Front 21

Notethat the lamina propria can be subdivided into a __ and a __

Back 21

papillary layer

reticular layer

Alsothe submucosa has minor salivary glands

Front 22

Back 22

Bloodsupply in the floor of the mouth and the cheek

Front 23

__ are important for sensing pain and temperature. They can be found in the lower and middleregions of the epithelium

Back 23

Free nerve endings

Front 24

** The tongue and pharynx have specialsensory receptors for taste. They arefound on what 3 papilla?

Back 24

fungiform, foliate and circumvallate

Front 25

Identify A, B, C, D

Skeletal muscle in 3 planes in the tongue

Back 25

Filiform (A),

fungiform (B),

foliate (C)

circumvallate papilla (D).

Front 26

Von ebner glands are what kind of gland?

Back 26

Serous secretin glands

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Front 28

3 cell types for taste

Back 28

- Bitter/sweet/umami

-Sour

-Salt

Front 29

Lining mucosa: tongue, floor of mouth, soft palate, epithelium,lamina propria, submucosa

Masticatory mucosa: hard palate, attached gingiva

- Epithelium: Thick, orthokeratinized orparakeratinized in parts) stratified squamous epithelium

-Longpapillae; thick, dense collagenous tissue

- Densecollagenous connective tissue attaches mucosa to periosteum (mucoperiosteum)

Back 29

fix

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Front 31

Where epithelium meets tooth?

Site of potential weakness wherebacteria can cause inflamation

Back 31

Dentogingival junction

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Front 33

The sulcular epithelium continues towardthe junctional epithelium which is in contact with the enamel and perhaps latercementum

Back 33

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Back 34

PDL

Front 35

Back 35

gingival ligament

Front 36

Fibers are found in the laminapropria of the gingiva and collectively form the gingivalligament:

- Dentogingival group

- Alveologingival group

- Circular group

- Dentoperiosteal group

- Transseptal fiber system

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