Chapter 2

Question 1

Skin and oral mucosa are….

Answer 1

Stratified squamous epithelium, aka, flat cells arranged in layers.

Question 2

What is the purpose of keratinization?

Answer 2

Process that makes surface epithelial cells stronger and waterproof.

Question 3

What is the purpose of non-keratinized epithelial cells? Where could you find these cells?

Answer 3

Cushions mechanical stress and wear, and could be found in mucosal lining of cheeks.

Question 4

Are there blood vessels in epithelial tissue?

Answer 4

NO

Question 5

Epithelial cell junctions mechanically attach a cell and it’s cytoskeleton to:

Answer 5

Neighboring Cells and Basal Lamina

Question 6

What is the strongest epithelium to withstand severe mechanical stresses have the most number of cell junctions ?

Answer 6

Skin

Question 7

Desmosome:

Answer 7

Connects two neighboring epithelial cells

Question 8

Hemi-Desmosome:

Answer 8

Connects epithelial cells to basal lamina.

Question 9

What are the cells of the connective tissue and what are their functions?

Answer 9

Fibroblasts -Fiber Builders
Macrophages and Neutrophils: phagocytes that devour dying cells and invasive microorganisms.
Lymphocytes: cells of the immune system.

Question 10

What dental tissues are labeled as connective tissue?

Answer 10

Cementum, Dentin, Pulp

Question 11

Is it better to have a smooth boundary or a wavy boundary?

Answer 11

Wavy! Better adhesion by increasing the surface area.

Question 12

What are the three anatomical areas of the gingival epithelium?

Answer 12

1. Oral Epithelium
2. Sulcular Epithelium
3. Junctional Epithelium

Question 13

What are the three main functions of the JE?

Answer 13

1. Provides seal at the base of the gingival sulcus.
2. Protective barrier between plaque and biofilm
3. Can release substances that activate body’s defense system if needed.

Question 14

What composes the dentogingival unit ?

Answer 14

Junctional epithelium and gingival fibers.

Question 15

The gingival margin is ____ in health.

Answer 15

Wavy

Question 16

Facts about sulcular epithelium.

Answer 16

• thin and non keratinized.
• Permeable , fluid can flow from connective tissue.
• smooth interface in health.

Question 17

Junctional Epithelium Facts

Answer 17

• Forms the base of the sulcus.
• Easiest point of entry for bacteria to invade connective tissue.
• The attachment of the gingiva to the tooth where we stop when probing.

Question 18

Functions of the Junctional epithelium:

Answer 18

1. Provides seal
2. Protective layer between plaque and biofilm.
3. Releases substances that activate the body’s defense system.

Question 19

JE + Gingival Fibers=

Answer 19

Dentogingival Unit

Question 20

What does the dentogingival unit do?

Answer 20

Provides structural support to gingival tissue.

Question 21

Alveologingival

Answer 21

Connects the bone to the gingiva

Question 22

Transseptal

Answer 22

Connects adjacent teeth to one another.

Question 23

Alveolar Crest Fibers of the PDL

Answer 23

Resists horizontal tooth movements.

Question 24

Horizontal fibers of PDL

Answer 24

Resists horizontal pressure against crown of tooth.

Question 25

Oblique Fibers of the PDL

Answer 25

Resists vertical pressures that threaten to drive the root into its socket.

Question 26

Apical Fibers of the PDL

Answer 26

Secures tooth in its socket and resists forces that might lift the tooth from its socket.