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Flashcards in Pulp Deck (61)
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1

Pulp

Soft connective tissue that supports dentin

2

What are some unique features of pulp?

Vascular
Not calcified

3

What is the embryonic origin of the pulp?

Ectoderm - neural crest ectomesenchyme - dental papilla

4

What are some contents of pulp?

Cells and cellular elements
Blood and lymphatic vessels
Extracellular matrix

5

What are the functions of pulp?

Inductive
Formative
Nutritive
Protective
Defensive/Repairative

6

Inductive function of pulp

Very early in development, it is involved in inducing transition from dental lamina to bud stage

7

Nutritive function of pulp

Helps supply the dentin with nutrients and water

8

What changes might an endodontically treated tooth undergo?

Dentin will become more brittle because pulp can bring nutrients

9

What are the protective mechanisms of the pulp?

Sensory mechanism
Barrier

10

Sensory mechanism of pulpal protection

Nerve fibers travel in the pulp, which inform us if the tooth is injured, causing us to use the tooth less, preventing further damage

11

Barrier mechanism of pulpal protection

Pulp are under positive pressure at odontoblast junctions - if there is a break, the positive pressure forces things out into the oral cavity, protecting the underlying pulp

12

Defensive/repairative mechanisms of pulp

Immune system
Formation of new dentin and pulp

13

What are the types of foramina of the pulp?

Apical foramen
Accessory foramen

14

What happens to pulp chambers as we age?

They get smaller - making endo more difficult with older patients
Pulp has more cells at a young age and more extracellular matrix in older ages

15

T/F - the pulp is never calcified

False - it is common to have ectopic calcifications

16

What are the types of ectopic calcifications?

Pulp stones
Diffuse calcifications

17

Pulp stones

Ectopic calcification commonly found in pulp chamber in crown of the tooth
Spherical or ovoid
No clear cause

18

Diffuse calcifications

Ectopic calcification often found near blood vessels

19

Are ectopic calcifications problematic?

Not likely, mostly likely just an annoyance if you're an endodontist

20

What are the zones of the pulp?

Odontogenic zone
Pulp core

21

Odontogenic zone layers

Odontoblast layer
Cell free zone
Cell rich zone

22

Odontoblast layer

Most superficial layer of odontogenic zone
Single layer of odontoblasts lining the pulp dentin border
Can look like multiple layers, but its likely an artifact of how the slide was cut

23

Cell free zone

Cells are less prominent
Middle layer of odontogenic zone

24

Cell rich zone

Increase concentration of fibroblasts
Deep layer of odontogenic zone

25

Pulp core

Lots of fibroblasts, blood vessels, and nerves

26

What cells are found in the pulp?

Odontoblasts
Fibroblats
Immune system cells
Stem cells

27

Odontoblasts

Cells that make dentin
Has processes that go into dentinal tubules

28

Fibroblasts

Confined in the pulp
Secrete ECM of the pulp
-mostly collage, but other proteins as well

29

What are the 2 types of immune system cells in the pulp?

Resident immune cells
Inflammation cells

30

What are the types of Resident Immune cells

Macrophages
Lymphocytes
Eosinophils
Dendritic cells