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Basic Oral science > Oral Mucosa > Flashcards

Oral Mucosa Flashcards

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1
Q

Function of oral mucosa (have to briefly explain in exam)

A

Protection
Secretion
Sensation
Thermal regulation

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2
Q

Protection (oral mucosa)

A

Protect soft tissue from mechanical forces and surface abrasions from hard particles in diet
Act as a barrier from the toxic effects of microorganism

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3
Q

Sensation

A

Receptors respond to the temperature, touch and pain
Tongue has taste bud

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4
Q

Secretion

A

Secret saliva to maintain the moisture of the oral cavity

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5
Q

Thermal regulation

A

Only for animal

Dog remove heat from body throughout the oral mucosa by panting

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6
Q

Layers of oral mucosa

A

1) Oral epithelium
2) Basement membrane
3) Lamina Propria
4) Submucosa layer
5) Mucoperiostium

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7
Q

submucosa and its function

A

A layer of loose fatty or grandular connective tissue containing major blood vessels& nerve supply

separates oral mucosa from underlying bone or muscle

composition determines the flexibility of the attachment of oral mucosa to underlying structures

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8
Q

Where submucosa found in

A

Cheek
lips
hard palate near the molar area

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9
Q

Sebaceous gland appear as pale yellow spots known as?

A

Fordyce’s spots
Fordyce’s disease

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10
Q

Two types of oral epithelium

A

1) Stratified Squamous Keratinized Epithelium:

Orthokeratinized& Parakeratinized

2) Stratified squamous Nonkeratinized Epithelium

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11
Q

Cell layers in Stratified squamous keratinized epithelium

A

1) Basal Layer (Stratum Basale) : Cuboidal/ columnar cells adjacent to basal lamina

2)Prickle Layer (Stratum spinosum) : 8-10 layers
Large elliptical/ spherical cells

3) granular layer (Stratum Granulosm) : 3-5 layers
Large flattened cells contains keratohyalin granules

4) Stratum Corneum (Cornified layer) : 10-20 layers Squamous cells (flat cells) in which all organelles are lost.

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12
Q

Orthokeratinization

A

No nuclei in the keratin layer

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13
Q

Parakeratinization

A

Contain nuclei in keratin layer
only few scattered granules in granular layer

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14
Q

Cell layers in stratified squamous Non-keratinized epithelium

A

Basal layer (Stratum basale)
Intermediate layer (Stratum intermedium)
Superficial layer (Stratum superficial)

No granular layer
superficial layer contain nuclei

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15
Q

10% of cell populations in oral epithelium consists of

A

1) Pigment-producing cells or melanocytes
2) Langerhans cells
3) Merkel cells
4) Inflammatory cells

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16
Q

Two types of pigment-producing cell (Melanocytes)

A

Endogenous
Exogenous

17
Q

Basement Lamina/ basement membrane

A

Where lamina propria meets the overlying oral epithelium
Increase area of interface and create a stronger attachment

18
Q

Basement membrane of Masticatory mucosa

A

Increase papillae and longer epithelial rete pegs

19
Q

Basement membrane of Lining mucosa

A

Fewer papillae and shorter ridges

20
Q

Lamina Propria (Corium)

A

Connective tissue that support oral epithelium

21
Q

Two layers of lamina propria

A

Papillary layer (with epithelial ridges)
Reticular layer (Netlike)

22
Q

Papillary layer

A

consist loose connective tissue within the connective tissue papillae

•Equal amount of fibers, cells and intercellular
substance.

23
Q

Reticular layer (dense layer)

A

consist dense tissue and large amount of fibers

deeper portion

24
Q

What is between papillary layer and the deepest layers of the lamina propria

A

Capillary plexus

25
Q

Function of capillary plexus

A

provides nutrition for all mucosa and send capillaries into connective tissue papilla

26
Q

Composition of lamina propria

A

1) Cells

i) Fibroblasts- major
ii) Macrophages
iii) Mast cells
iv) Inflammatory cells

2) Fibers

i) collagen
i) elastic fibers

3)Ground substances

i) Proteoglycans
ii) Glycoprotein

4) Blood vessels

5)Nerves

27
Q

Organization of oral mucosa

A

Lining mucosa- 60%
Masticatory mucosa- 25%
Specialized mucosa- 15%

28
Q

Mucoperiostium

A

oral mucosa is attached directly to
the periostium of underlying bone with no interverning
submucosa.

• provides a firm & inelastic attachment.

• Can be found at Attached gingiva and parts of the
hard palate.

29
Q

Alveolar mucosa histology

A

Example of lining mucosa
Thin non-keratinized epithelium.

• Extensive vascular supply in the lamina propria.

• Reddish pink-tissue.

• Numerous of elastic fibers in lamina propria– mobile
tissue.

• Sub-mucosa is loosely attached to the underlying
muscle/ bone

Basic Oral science (5 decks)

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