Dental pulp and its responses: oral biology lecture 2

Question 1

In embryology and prenatal development, the dental papilla is a condensation of what type of cells

Answer 1

ectomesenchymal cells called odontoblasts

Question 2

what are the 3 functions of the pulp

Answer 2

dentine formation

defence and repair

sensory

Question 3

name the part highlighted green

Answer 3

pulp horns

Question 4

name the part highlighted dark blue

Answer 4

coronal pulp chamber

Question 5

name the part highlighted black

Answer 5

radicular pulp

Question 6

name the part highlighted light blue

Answer 6

Apical foramen

Question 7

there are cells present in the pulp what is the function of odontoblasts cells

Answer 7

dentinogenesis, formation of dentin

Question 8

there are cells present in the pulp what is the function of fibroblasts

Answer 8

synthesizes the extracellular matrix and collagen. Helps with repair.

Question 9

there are cells present in the pulp what is the function of pulpal stem cells

Answer 9

• dental pulp stem cells derive from cranial neural crest lineage, retain a remarkable potential for neuronal differentiation.

Question 10

there are cells present in the pulp what is the function of defence cells

Answer 10

help against invasion of foriegn pathogen

Question 11

odontoblast are a specialised ………. cell

Answer 11

ectomesenchyme cell

Question 12

where are odontoblasts process located

Answer 12

in the dentine

Question 13

is a cell structure specialised for cell to cell adhesion: best describes what type of junctional complexes

Answer 13

desmosomes

Question 14

seal adjacent epithelial cells in a narrow band just beneath their apical surface. ……………perform two vital functions they limit the passage of molecules and ions through the space between cells. : best describes what type of junctional complexes

Answer 14

tight junctions

Question 15

are specialised intracellular connections between a multitude of animal cell-types. They directly connect the cytoplasm of two cells, which allows various molecules, ions and electrical impulses to directly pass through a regulated gate between cells. : best describes what type of junctional complexes

Answer 15

gap junctions

Question 16

what is a postmitotic cell in the tooth (do not undergo mitosis anymore)

Answer 16

odontoblasts

Question 17

the activity of odontoblast is controlled by what

Answer 17

growth factors

Question 18

what are the most numerous cells in the cell rich zone

Answer 18

fibroblasts

Question 19

what happens to the stem cells ability to retain embryonic potential with age

Answer 19

it decreases

Question 20

human dental pulp stem cells can differentiate to which two cells

Answer 20

fibroblasts and odontoblast

Question 21

what are the defence cells present in the pulp

Answer 21

macrophages and T-Lymphocytes

Question 22

the pulp contains many fibres. 34% of the fibres is collagen.

collagen is broken down to type 1 and type 2 what are there concentrations

Answer 22

type 1 = 60%

type 2 = 40%

Question 23

do the venules in the pulp have valves

Answer 23

no

Question 24

what are the main features of the capillaries in the pulp

Answer 24

they are fenestrated capillaries - have pores which allows for small molecules and limited amounts of protein to diffuse

Question 25

which nerves act on the sympathetic vasoconstrictor and sympathetic vasodilator

Answer 25

efferent autonomic nerves

Question 26

stimuli detected by dentine is recieved in the brian by what nerves

Answer 26

afferent nerve

Question 27

what does the stasis of blood vessels result

Answer 27

pulpal death

Question 28

what is present in dental fluid

Answer 28

protein, glycoprotein and polysaccharides

Question 29

what changes fluid flow

Answer 29

pulpal pressure

Question 30

what percentage of the nerve innervation in pulpal chamber are non-myelinated

Answer 30

70-80%

Question 31

what is the plexus of Raschkow referred to as

Answer 31

cell free zone