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ODS > Histology Of Gingiva > Flashcards

Histology Of Gingiva Flashcards

1
Q

What are the 3 areas of dento gingival junction epithelium?

A

Junctional epithelium
Sulcular epithelium
Oral epithelium

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2
Q

Four tissues of the periodontium

A

Gingiva
Cementum
Periodontal ligament
Alveolar bone

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3
Q

What is the col?

A

Gingiva between the interdental margin of teeth

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4
Q

Only visible gingival epithelium

A

Oral epithelium

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5
Q

What type of epithelium is oral epithelium?

A

Keratinised stratified squamous

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6
Q

What are the cell layers of oral epithelium?

A
  • Basal layer - cube
  • Prickle layer - spine like
  • Granular layer - flattened - increased keratin
  • Keratinized layer - flatened - extensive keratin
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7
Q

What holds cell to cell attachment in gingival epithelium together?

A

Desmosomes

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8
Q

Where is sulcular epithelium located?

A

Faces the tooth substance but not in contact with the tooth

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9
Q

Structures of sulcular epithelium

A

Thin
No rete pegs
Non keratinised
Semi permeable

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10
Q

What epithelium does gingival crevicular fluid flow between?

A

Sulcular epithelium

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11
Q

What are the cell layers of Sulcular epithelium?

A

Basal cell layer - cube
Prickle cell layer - spine
Superficial cell layer

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12
Q

What are the cell layers of junctional epithelium?

A

Basal cell layer - cubed
Prickle cell layer - spine
Tooth

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13
Q

What type of epithelium is junctional epithelium?

A

Stratified squamous non keratinised

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14
Q

How many cells thick is the junctional epithelium at apical zone?

A

4-5 cells layers thick

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15
Q

How many cells thick is junctional epithelium coronally?

A

15-30 cells thick

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16
Q

Where is junctional epithelium located?

A

Joins gingiva to tooth

17
Q

Why is junctional epithelium present?

A

Whole body is a sheet of epithelium and the teeth penetrate this. The junctional epithelium is the body’s attempt to seal the opening.

18
Q

Internal basal lamina structure and location

A

Thin layer of extra cellular matrix between epithelial cells and tooth surface

19
Q

External basal lamina structure and location

A

Thin layer of extra cellular matrix between epithelial cells and gingival connective tissue

20
Q

What do hemidesomes connect

A

Epithelial cells to internal and external basal lamina

21
Q

Three main functions of junctional epithelium

A

Attachment
Barrier
Host defence

22
Q

Gingival connective tissue function and location

A

Provides solidity to free and attached gingiva and attaches the gingiva to the cementum and alveolar bone

23
Q

What is the gingival connective tissue also known as?

A

Lamina propria

24
Q

What is the function of supra gingival fibres?

A

To provide a brace for the gingiva to withstand forces of mastication in different directions
(Hold tooth upright)

25
Q

What does inflammation cause to the supra gingival fibres?

A

Lose of density, becomes spongy

26
Q

Supra gingival fibre from alveolar crest to gingival connective tissue?

A

Alveologingival AG

27
Q

Supra gingival fibre that’s a ring coronally around crestal bone?

A

Circular C

28
Q

Supra gingival fibre from cementum fan into gingival tissue?

A

Dentogingival DG

29
Q

Fan from periosteum supra gingival fibre?

A

Periosteogingival PG

30
Q

Which supra gingival fibre runs mesiodistal direction along whole dental arch linking teeth together

A

Intergingival IG

31
Q

Supra gingival fibre that encircles several teeth linking them together?

A

Intercircular IC

32
Q

Supra gingival fibre located in papilla, connecting oral and vestibular papilla?

A

Interpapillary IP

33
Q

Supra gingival fibre from cementum to cementoenamel junction and runs horizontally linking teeth together

A

Transgingival TG

34
Q

Super gingival fibre from cementum of one tooth to another tooth over crestal bone

A

Transeptal TS

35
Q

Microscopic anatomy of junctional epithelium

A
  • Closely packed epithelial cells
  • Neighbouring cells joined by desmosomes
  • Internal basal lamia; thin layer of extracellular matrix between epithelial cells and tooth surface
  • External basal lamia; thin layer of extracellular matrix between epithelial cells and gingival connective issue.
36
Q

Which basal lamina lies between epithelial cells and tooth surface?

A

Internal basal lamina

37
Q

Which basal lamina sits between epithelial cells and gingival connective tissue?

A

External basal lamina

38
Q

What is the depth and shape of the gingival sulcus in health?

A

3mm or less and triangle in shape

ODS (24 decks)

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