Histology Of Gingiva

Question 1

What are the 3 areas of dento gingival junction epithelium?

Answer 1

Junctional epithelium
Sulcular epithelium
Oral epithelium

Question 2

Four tissues of the periodontium

Answer 2

Gingiva
Cementum
Periodontal ligament
Alveolar bone

Question 3

What is the col?

Answer 3

Gingiva between the interdental margin of teeth

Question 4

Only visible gingival epithelium

Answer 4

Oral epithelium

Question 5

What type of epithelium is oral epithelium?

Answer 5

Keratinised stratified squamous

Question 6

What are the cell layers of oral epithelium?

Answer 6

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

Question 7

What holds cell to cell attachment in gingival epithelium together?

Answer 7

Desmosomes

Question 8

Where is sulcular epithelium located?

Answer 8

Faces the tooth substance but not in contact with the tooth

Question 9

Structures of sulcular epithelium

Answer 9

Thin
No rete pegs
Non keratinised
Semi permeable

Question 10

What epithelium does gingival crevicular fluid flow between?

Answer 10

Sulcular epithelium

Question 11

What are the cell layers of Sulcular epithelium?

Answer 11

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

Question 12

What are the cell layers of junctional epithelium?

Answer 12

Basal cell layer - cubed
Prickle cell layer - spine
Tooth

Question 13

What type of epithelium is junctional epithelium?

Answer 13

Stratified squamous non keratinised

Question 14

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

Answer 14

4-5 cells layers thick

Question 15

How many cells thick is junctional epithelium coronally?

Answer 15

15-30 cells thick

Question 16

Where is junctional epithelium located?

Answer 16

Joins gingiva to tooth

Question 17

Why is junctional epithelium present?

Answer 17

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

Question 18

Internal basal lamina structure and location

Answer 18

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

Question 19

External basal lamina structure and location

Answer 19

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

Question 20

What do hemidesomes connect

Answer 20

Epithelial cells to internal and external basal lamina

Question 21

Three main functions of junctional epithelium

Answer 21

Attachment
Barrier
Host defence

Question 22

Gingival connective tissue function and location

Answer 22

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

Question 23

What is the gingival connective tissue also known as?

Answer 23

Lamina propria

Question 24

What is the function of supra gingival fibres?

Answer 24

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

Question 25

What does inflammation cause to the supra gingival fibres?

Answer 25

Lose of density, becomes spongy

Question 26

Supra gingival fibre from alveolar crest to gingival connective tissue?

Answer 26

Alveologingival AG

Question 27

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

Answer 27

Circular C

Question 28

Supra gingival fibre from cementum fan into gingival tissue?

Answer 28

Dentogingival DG

Question 29

Fan from periosteum supra gingival fibre?

Answer 29

Periosteogingival PG

Question 30

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

Answer 30

Intergingival IG

Question 31

Supra gingival fibre that encircles several teeth linking them together?

Answer 31

Intercircular IC

Question 32

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

Answer 32

Interpapillary IP

Question 33

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

Answer 33

Transgingival TG

Question 34

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

Answer 34

Transeptal TS

Question 35

Microscopic anatomy of junctional epithelium

Answer 35

- 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.

Question 36

Which basal lamina lies between epithelial cells and tooth surface?

Answer 36

Internal basal lamina

Question 37

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

Answer 37

External basal lamina

Question 38

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

Answer 38

3mm or less and triangle in shape