Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Oral biology > OB D10 : Pulp > Flashcards

OB D10 : Pulp Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

Describe dental pulp.

A
  • connective tissue

- Essentially a matured dental papilla

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is dentine in relation to the pulp?

A

Dentine is the calcified tissue of the pulp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the pulp functions?

A
  • Dentine formation
  • Defence and repair
  • Sensory
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the pulp always producing?

A

secondary dentine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what else can the pulp produce?

A

reparative and reactionary tertiary dentine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What makes up the gross anatomy of the pulp?

A
  • Pulp horns
  • coronal pulp chamber
  • radicular pulp
  • apical foramen
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what do pulp horns mimic?

A

cusps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is important to remember when drilling young teeth?

A

Dont drill far before. you hit pulp chamber as pulp is big and equally its very easy for caries to get there

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the aim of a root canal?

A

to get rid of this space and leave no infected tissue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is not desirable?

A

apical delta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what can be a source of root canal failure?

A

Lateral canals are hard to see sometimes not visible til X-rays are taken after a root canal – cannot get instrument in there

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what are the similarities between pulp and connective tissue?

A
  •  Cells ‐ mainly fibroblasts.  -collagen matrix
  •  ground substance
  •  blood vessel and nerves
  •  75% water 25% organic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what are the differences between pulp and connective tissue?

A
  •  Specialised cells (odontoblasts )
  • Contained in a rigid chamber
  • No fat cells
  •  No oxytalin fibres (?)
  •  No mast cells
  •  Blood vessels ‐ wide lumen, narrow wall 
  • Densely innervated
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what does inflammation cause pain in the pulp?

A

pulp volume cannot increase therefore inflammation cause pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe layers of the pulp in cross section from outside to inside.

A
  • Odontoblast layer
  • Cell-free zone of weil
  • Cell rich zone
  • Pulp core
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Describe the odontoblast layer.

A 
- Odontoblasts:
columnar cells (50μm long in crown) 
process in dentine
-Appears pseudostratified (appears layered but has one layer
- organelles reflect activity
- junctional complexes ‐ barrier
17
Q

Name all the pulpal cells.

A
  • odontoblasts
  • fibroblasts
  • undifferentiated ectomesenchymal cells
  • defence cells
18
Q

What cell is most numerous in the cell rich zone?

A

fibroblasts

19
Q

Describe undifferentiated ectomesenchymal cells.

A
  • retain embryonic potential
  • Decrease with age
  • can form fibroblast or odontoblast
20
Q

Name the 2 defence cells in pulp.

A
  • Macrophages

- Lymphocytes

21
Q

What makes up the fibres of the pulp?

A

-Collagen (34% of pulp proteins)
-Of this collagen:
type 1- 56%
type III - 41%
also type V and VI
-no oxytalin fibres (elastic)

22
Q

Describe the the blood supply in pulp.

A 
-  Rich blood supply
  Contains
- Terminate in rich sub‐ odontoblastic capillary plexus
-  Venules have no valves   
- Thin walled vessels
-  High perfusion rate
23
Q

where must the blood that comes into the pulp go?

A

come back out as cannot pool in the pulp

24
Q

What does dentinal fluid contain?

A
  • proteins
  • glycoprotein
  • polysaccarides
25
Q

where does fluid flow out?

A

outwards in opened tubules

26
Q

what is the intrapulpal pressure?

A

10mmHg

27
Q

what is the dentinal fluid flow velocity?

A

1-2 micrometers per second

28
Q

what fluid flow changes pulpal pressure?

A
  • Inflammation

- Vasoconstrictors

29
Q

what does vasoconstrictor in LA do and why could this be a problem?

A

vasoconstrictors in LA reduce the blood flow in the pulp and the rate of fluid flow out of the tubules – could be bad as outward fluid flow is protective

30
Q

Describe the pulpal innervation.

A
  • rich innervation
  • mainly sensory ‐ i.e. afferent
  • also efferent post‐ganglionic sympathetic
  • likely no parasympathetics
31
Q

what percentage if nerves are non-myelinated in the pulp?

A

70-80%

32
Q

what makes up the rest of myelinated fibres?

A

– 90% Ad (1‐6 m diameter)

– 10% are AB (6‐12 m diameter)

33
Q

what do nerves get towards the end?

A

more narrow

34
Q

what is the plexus of raschkow?

A

classically in the cell free zone

35
Q

where is the marginal plexus?

A

around odontoblasts

Oral biology (29 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions