Pulp

Front 1

a specialized loose connective tissue that provides the life supporting systems for itself & the dentin (odontoblasts

Back 1

Pulp

Front 2

specialized because it’s the only CT in the body that contains odontoblasts & can produce dentin

Back 2

pulp

Front 3

Contains coronal pulp (this is connective tissue)
Chamber resembles the outer surface of the crown
Diminishes in size with age
Pulp horns

Back 3

coronal pulp

Front 4

What are pulp horns?

Back 4

protrusions of the chamber that extend into the cuspal tips

Front 5

Extends from the cervix to apex of the root
Contains radicular pulp (this is connective tissue)

Back 5

Radicular pulp or root canal

Front 6

Major access for structures entering & exiting the pulp
Blood vessels
Nerves
Lymphatics

Back 6

Apical Foramen

note:Location & shape may undergo changes as a result of functional influence of the teeth
Bent to one side
Narrowed by cementum (occurs with age)

Front 7

Additional openings on the lateral surface of the root

Back 7

Accessory Root Canals

Front 8

What is the cause of the formation of accessory root canals?

Back 8

Portions of Hertwig’s epithelial root sheath break down prematurely
Cells of the developing pulp do not come in contact with the inner enamel epithelium of the HERS
Odontoblasts do not differentiate, and the dentin is not formed
Openings become invaded by blood vessels & nerves

Front 9

Contains cell bodies of the odontoblasts
Columnar cells w/cytoplasmic processes that extend into the dentinal tubules
Considered to be a single layer of cells, but may appear stratified

Back 9

Odontoblastic zone (not epithelium, connective tissue cells, most superficial) - has no basement membrn

Front 10

Virtual absence of cells
capillaries and nerves passing through the zone to reach the odontoblasts

Back 10

Cell-free zone (of Weil)

Front 11

Undifferentiated fusiform shaped (similar to squamous) cells that have the potential to form new odontoblasts

daughter cells of the cells that differentiated into odontoblasts

Back 11

Cell-rich zone

Front 12

What 2 cell types does the Cell-rich zone of pulp contain?

Back 12

undifferentiated cells and fibroblasts

Front 13

deepest layer
Nerve plexus
Nerve endings arise near odontoblastic cell body or cell process
Afferent fibers for pain

Back 13

Parietal layer (Raschkow’s Plexus)

Front 14

What are the other components of the odontogenic zones?

Back 14

Defense cells(leukocytes and macrophages), fibroblasts, blood vessels, lymph vessels

Front 15

Calcified structures in pulp, not considered pathological

Back 15

pulp stones

Front 16

Dentinal tubules irregularly arranged
Odontoblasts are flattened cells on the surface
Believed to be a result of pieces of HERS breaking off into the pulp as the root is being formed
Inner enamel epithelium of HERS induces the formation of odontoblasts

Back 16

true denticle

Front 17

Concentric layers of calcification – no dentinal matrix
Forms on necrotic cells, collagen fibers, or even small blood vessels

Back 17

false denticle

Front 18

what are the 3 types of true and false denticles?

Back 18

free, attached, embedded

Front 19

what decreases with age of the tooth

Back 19

fibroblasts, defense cells, size of pulp chamber

Front 20

what increases as the tooth ages

Back 20

collagen fibers, as the tooth becomes more fibrotic it is less able to undergo repair