Anatomy of the Periodontium Part I #1

Question 1

What are the 3 kinds of gingiva?

Answer 1

1. Free gingiva
2. Attached Gingiva
3. Interdental papilla

Question 2

Where is the free gingival margin located?

Answer 2

1.5-2mm coronal to the CEJ

Question 3

What is the Free gingiva made of?

Answer 3

Keratinized epithelium

Question 4

______ is where the PDL attaches to cementum.

Answer 4

Sharpes fibers

Question 5

_____ is where PDL attaches to alveolar bone proper (inner cortical plate) .

Answer 5

Bundle bone

Question 6

_______ Determines the shape and form of the tooth.

Answer 6

Dental papilla

Question 7

Dental papilla gives rise to ______ and _____.

Answer 7

Dentin and pulp

Question 8

Dental follicle gives rise to ________.

Answer 8

Periodontium

Question 9

_________ Condenses and forms dental papilla and follicle.

Answer 9

Ectomesenchyme

Question 10

_______ Induce the differentiation of cells of follicle into cementoblasts.

Answer 10

Amelogenins

Question 11

The PDL is formed by _________.

Answer 11

Fibroblasts (that are differentiated from dental follicle lateral to the cementum).

Question 12

Osteoblasts differentiate from __________.

Answer 12

dental follicle ectomesenchymal cells

Question 13

The Free gingival groove corresponds with the ______ and is found in ____% of adults.

Answer 13

CEJ

30-40% of adults

Question 14

________ faces tooth surface without touching it.

Answer 14

Oral sulcar epithelium

Question 15

_______ provides contact between tooth and gingiva.

Answer 15

Junctional Epithelium

Question 16

________ is the source for sulcar epithelium.

Answer 16

Oral epithelium

Question 17

What are the Macroscopic limits of the free gingiva?

Answer 17

From the Free gingival margin to Free gingival groove.

Question 18

What are the Microscopic limits of the Free gingiva?

Answer 18

From the Free gingival margin to the JE

Question 19

Where is the width of the attached gingiva greatest?

Answer 19

in the incisors

Question 20

Where is the width of the attached gingiva narrowest?

Answer 20

in premolars

Question 21

What happens to width of attached gingiva with age?

Answer 21

it ( the width) increases with age

Question 22

What does the shape of the interdental papilla depend on?

Answer 22

• the contact of the adjacent teeth
• with of proximal tooth surfaces
• Course of CEJ

Question 23

What happens to interdental papilla if tooth is extracted?

Answer 23

It goes from being concave to convex, b/c it only exist because of presence of tooth.

Question 24

T or F the interdental papilla can disappear and be recreated.

Answer 24

True

Question 25

What are 4 layers of Oral epithelium?

Answer 25

1. basal layer
2. Prickle layer
3. Granular layer
4. Keratinized cell layer

Question 26

As you go towards the basal layer of oral epithelium there are more ________.

Answer 26

Organelles

Question 27

As you go towards the Keratinized layer of Oral epithelium, there are more _________.

Answer 27

Desmosomes

Question 28

What are the 2 types of Oral epithelium?

Answer 28

• orthokerantinized = no nucleus

- parakeratinized = nuclear remnants

Question 29

______ make up 90% of oral epithelium.

Answer 29

Keratinocytes

Question 30

Where is the basement membrane found in oral epithelium?

Answer 30

Between basal layer and connective tissue.

Question 31

What are the 2 layers of the basement membrane?

Answer 31

Lamina lucida = adjacent to basal cells

Lamina Densa = adjacent to connective tissue

Question 32

What causes stippling?

Answer 32

Boundary between OE and Underlying CT.

• Epithelial rete pegs
• CT papillae
• Sign of health!