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Oral Mucosa > Oral Mucosa > Flashcards

Oral Mucosa Flashcards

1
Q

Define oral mucosa

A

The mucosa membrane lining the inside of the mouth

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2
Q

Make properties of oral mucosa

A

Lighter than skin
Constantly moist
Doesn’t have skin appendages such as hair follicle and sweat glands

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3
Q

What’s are the functions of oral mucosa

A
  • protection against mechanics,abrasive and microbial threats
    -sensation-touch,temperature, taste, thirst and pain
  • secretion -minor salivary glands and limited sebaceous glands
  • absorption -sublingual dissolving drugs
  • thermal regualtion - only in animals not humans
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4
Q

Name the structure of the oral mucosa top to bottom

A

Epithelium
Laminate proprietor
Submucosa
Periosteum
Bone

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5
Q

Name 7 types of epithelial tissue

A

Simple squamous
Simple cuboidal
Simple columnar
Transitional
Stratified squamous
Stratified cuboidal
Pseudostratifidd columnar

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6
Q

Name 5 types of attachments between epithelia cells

A

Tight junctions
Adherens junction
Desmosomes
Gap junction
Hemidesmosomes

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7
Q

Name different names of keratinocytes

A

Ortho keratin - no nuclei in superificial layer
Par-keratins - remnants of small nuclei in superficial layer

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8
Q

What are non keratinocytes and name 4 examples

A

Cells of non keratinised epithelium
Nuclei is in the superficial layer

-melanocytes - immune defence - Antigen presenting cells
-Lange thanks -pigmentation ,synthesis of melanin
-Merkels cells- sensory -tactile sensation
-inflammatory cells

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9
Q

Name layers in keratinised and non keratinised cells

A

Keratinised cell
- surface layer
Granular intermediate layer (keratonohyaline granules)
Prickles cell layer( tonifibrils)
Basal layer

Non keratinised
- surface layer
Intermediate layer (glycogen)
Prickle cell layer
Basal layer ( tonofilaments )

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10
Q

What components does the lamina propria have

A

Cells
Fibres
ECM
Blood vessels

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11
Q

What cells are found in oral mucosa

A

Fibroblasts - synthesis gives and ECM
Endothelial - line blood vessels
Inflammatory
- macrophages - phagocytosis,APCS
-Mast cells- contain histamine and heparin - inflammation anaphylaxis immunity
-lymphocytes - increase during inflammation and secrete antibiotics

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12
Q

What fibres are found in oral mucosa

A

90% collagen tyep 1
8% collagen type 3
2 % non. Collagenous fibres elastin oxytalan

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13
Q

What is the ECM

A

Hydrated gel of glycoproteins and proteoglycans

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14
Q

What types of oral mucosa are found in masticatory, lining and tongue

A

Masticatory -keratinised
Lining- nonkeratinised
Tongue - keratinised

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15
Q

Where are taste buds found

A

Between soft and hard palate
In the cirumvallate papillae

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16
Q

What are junctions of papillae

A

Mucocutaneous
Mucodental
Mucogingival

17
Q

In the lining mucosa soft palate
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

Covering epithelium - thin, non keratinised, SS epithelium
Lamina propria - THICK with short papillae
Submucosa - diffuse tissue containing numerous minor salivary glands

18
Q

In the ventral surface of the tongue
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thin non keratinised SS epithelium
LP: thin numerous short paillaire and elastic fibres, few minor salivary glands, a capillary network in subpapilalry layer
SM: thin and irregular
Mucosa bound to connective tissue surround tongue muscualotr

19
Q

In the floor of mouth
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: Very thin, non keratin SS epithelium
LP: short papillae some elastic fives
Extensive vascular supply
SM: loose fibrous connective tissue containing fat and minor salivary glands

20
Q

In the labial and buccaneers mucosa
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: VERY THICK, non keratinised SS epithelium
LP: long slender papillae , dense fibrous connective tissue containing collagen
SM: mucosa attached to underlying muscle by collagen and elastin
Dense collagenous connectuve tissue

21
Q

Lips : vermillion zone
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thin orthokeratinized SS eptiehialum
LP: numerous narrow papillae
SM: mucosa attached to underlying muscle

22
Q

Lips: intermediate zone
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thin parakeratinised
LP: long irregular papillae

23
Q

In the masticatory mucosa gingiva
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thick ortho para keratinised ss epithelium
LP: long narrow papillae dense collagenous connective tissue
SM: no distinct layer, mucosa firmly attached by collagen fibres to cementum and periosteum

24
Q

In the hard palate
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thick orthokeratinsied SS
LP: long papillae
SM: dense collagenous connective tissue

25
Q

In the specials mucosa dorsal surface of tongue
What is it’s structure in covering epithelium
Lamina propria and submucosa

A

CE: thick keratinised and non SS epithelium forming 3 types of papillae
LP: long papillae, rich innervation near taste buds
Minor salivary glands in. Posterior portion

SM: no distinct layer
Mucosa bound to connective tissue

Oral Mucosa (1 decks)

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