Pulp Histology

Question 1

In what stage of tooth development does epithelium rapidly differentiate?

Answer 1

Lamina stage

Question 2

In what stage is the tooth bud formed with dental mesenchyme on the perimeter?

Answer 2

Bud stage

Question 3

In what stage is the enamel organ formed?

Answer 3

Cap stage

Question 4

In which stage is the dental papala further

differentiate?

Answer 4

Bell stage

Question 5

What are the 5 stages of tooth development?

Answer 5

lamina, bud stage, cap stage, bell stage, eruption

Question 6

True or False?

Odontoblasts form dentin and dentin interact with ameloblasts to form enamel.

Answer 6

True

Question 7

Where do the dentin and pulp originate from?

Answer 7

The dental papilla

Question 8

What are the two parts of the pulp space?

Answer 8

coronal and radicular pulp

Question 9

True or False? Pup participates in initiation and development of dentin, this in turn leads to formation of enamel.

Answer 9

True

Question 10

True or False? Pulp supplies nutrients that are essential for dentin formation.

Answer 10

True

Question 11

True or False? Odontoblasts form dentin in response to injury.

Answer 11

True

Question 12

True or False? Sensation is the response of pulp to stimuli applied directly or through enamel and dentin

Answer 12

True

Question 13

What 5 things make up the structure of dental pulp?

Answer 13

• dentin
• predentin (unmineralized dentin matrix)
• odontoblasts
• subodontoblastic plexus of Raschkow (cell free zone and cell rich zone)
• pulp proper

Question 14

What are the parts of the pulp from outer to inner layer?

Answer 14

odotoblastic zone, cell free zone, cell rich zone, pulp core

Question 15

What are the cells that make up the pulp?

Answer 15

odontoblasts, fibroblasts, undifferentiated ectomesenchymal cells, macrophages, denritic cells, and lymphocytes

Question 16

What type of cell synthesizes the matrix and controls the mineralization of dentin?

Answer 16

odontoblasts

Question 17

What type of junction allows communication between cells?

Answer 17

gap junctions

Question 18

What type of junction controls permeability of the layer?

Answer 18

tight junctions

Question 19

What type of junction mechanically links cells?

Answer 19

desmosomes

Question 20

What is the most common pulp cells which is found in both the cell-rich zone and pulp core?

Answer 20

fibroblasts

Question 21

What cell forms and maintains the pulp matrix?

Answer 21

fibroblasts

Question 22

What type of lymphocyte is present in normal pulp?

Answer 22

T cells

Question 23

What type of lymphocyte is found in inflamed pulp?

Answer 23

B cells

Question 24

What are the fibers in the extracellular components of pulp?

Answer 24

Type I collagen (predominant), Type III, Type V

Question 25

What makes up the ground substance in the extracellular of pulp?

Answer 25

glycosaminoglycans, glycoproteins, water (sol-gel)

Question 26

True or False? Pulpal vessels have thinner walls owing to “low-compliance” environment.

Answer 26

True

Question 27

What are the types of pulpal nerves?

Answer 27

sensory, sympathetic

Question 28

What is the significance of pulp stones?

Answer 28

They decrease the overall number of pulp cells, decreases reparative potential, and interferes with RCT but does not cause pain

Question 29

What happens to pulp when it ages?

Answer 29

increases in collagen, decreases in vascular flow, becomes more fibrous and less cellular