Brainscape's Knowledge GenomeTM

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


See full index

Oral Histology > Pulp histology and dentin pulp > Flashcards

Pulp histology and dentin pulp Flashcards

1
Q

what is the pulp cavity

A

central space of tooth that has neurovascular structures and LCT

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

what is in the pulp chamber and where is it

A

pulp horns and furcation zones

located in crown

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

what is in the root cannal and where is it

A

radicular pulp and in root

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

what is the apical foramen and what is significant about it

A

opening of the apex in root

entry of neurovasculatar structures from periodontium to pulp. the foramen forms open communication with surrounding periodontal area

**INFECTION SPREAD

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

what is the 2 way infection spread in pulp

A

pulp -> PDL space AND PDL space -> pulp of adjacent teeth

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

what is the pulp comprised of DICT or LCT

A

LCT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what makes up the LCT

A

75% water
25% organic
5% collagen I and III

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

T/F there are elastic fibers in the LCT

A

FALSE

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

what are the two layers in the peripheral region of the pulp chamber

A

odontoblastic layer and sub-odontoblastic layer

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

what is found in the odontoblastic layer

A

odontoblasts that are fully mature

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

what is found in the sub-odontoblastic layer

A

hoehl’s cells = odontoblast precursor
CFZ = tons of unmye nerve fibers and capillaries
CRZ = tons of fiberblasts, WBC, stem cells, MYElinated nerves via plexus of Raschkow

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

what is in the central pulp core

A

neurovasculature stuff here

BV branch into capillary bed.
large axon nerve plexus of Raschkow –> extends into sub-odonto region. mye alpha delta and alpha beta and UNMYE C fibers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

5 cells in the pulp

A

Odontoblasts
hoehl cells
undiff stem cells
fibroblasts
WBC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what do odontobaslts produce

A

dentin, ECM, GF

**primary, secondary and tertiary dentin

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

what are post-mitotic and polarized cells

A

odontoblasts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are odontoblast precursors and produce 3 dentin

A

hoehl’s cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what are ectomesenchyme derived and found in the CRZ

A

undiff stem cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what can become odontoblast like cells and deposit 3 REPARATIVE dentin

A

undiff stem cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what cells are found in the CRZ and central pulp and root that maintain the LCT

A

fibroblasts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what increase in activity during age and can cause fibrosis in the pulp horns and canal

A

fibroblasts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what types of WBC are found in the pulp

A

macrophages, APC, lymphocytes, leukocytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what forms a capillary bed in the crown

A

sup/inf alveolar vessels (enter via apical foramen)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

does the capillary bed in the crown enter the dentin tubules?

A

NO!!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what controls blood flow to the capillaries

A

autonomic POST-gang SYMPATHTICS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

in a carious lesion, does the capillary bed become more or less permeable

A

MORE! WBC influx into the pulp and this can lead to necrosis and nerve fibers dying

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

T/F cementum can get deposited at the apical foramen and we can also get calcification of pulp vessels

A

TRUE

27
Q

T/F the root has more nerve fibers that crown

A

FALSE!! crown has more

28
Q

Do we have GSA or GVA fibers in the pulp

A

GSA!!

29
Q

what are the GSA nerves

A

superior dental plexus = ant, middle, post of V2
IAN
incisive (V3)

30
Q

pathway of GSA fibers

A

convey pain/temp to trige ganglion –> spinal nuc of V –> trigeminothalamic tract –> somatosensory cortex

31
Q

3 types of GSA fibers

A

alpha delta (MYE)
alpha beta (MYE)
c fibers (UNMYE)

32
Q

what is the GVE fiber

A

POST-gang SYMPATHETIC unmye!!

33
Q

what does the post gang sympathic fibers do

A

vasoCONSTRICT BV

34
Q

what are the 2 things you need to have sensitivity

A
  1. dentin exposure
  2. tubules that are patent
35
Q

what theory do we think is true for sensitivity and what is it

A

HYDROdynamic

fluid movement through tubules displaces cell/process leading to stimulation of nerve fibers in the tubules and pulp

36
Q

T/F reactionary dentin is slow and has no tubules

A

FALSE

it IS slow but HAS irregular tubules

37
Q

what produces reactionary dentin

A

OB and hoehl cells

38
Q

is reparative dentin slow or fast and does it have tubules or no tubules

A

FAST and NO tbules

39
Q

what produces reparative dentin

A

pulp stem cells

40
Q

what in interglobular dentin

A

due to change in mineralization

41
Q

is interglobular dentin associated with reparative or reactionary dentin

A

REACTIVE dentin

42
Q

what does a calciotraumatic line show and separates

A

shows there was a disruption in calcification

separates 2 dentin from reactive 3 detin

43
Q

what are true pulp stones

A

comprised of DENTIN and has dentin tubules

44
Q

what are false pulp stones

A

concentric mass of calcified matrix due to cellular degeneration that is then calcified. can be free or attached

45
Q

T/F FALSE pulp stones contain dentin

A

FALSE! TRUE do

46
Q

what type of pulp stones are most common

A

FREE FALSE stones

47
Q

what are dystrophic calcifications

A

diffuse calcification involving BV due to age or trauma

48
Q

what are some things that happen when we age

A
  1. change in size and shape of pulp chamber and canal
  2. DECREASE permeability in dentin due to INCREASE deposited of peritubular dentin -> sclerotic dentin
49
Q

what type of dentin is put down in response to carious lesions

A

REACTIONARY (slow and irregular tubules)

50
Q

pathway of carious lesion

A

acids diffuse through pores -> demin enamel -> reaches DEJ -> dentin tubules = initiates inflam response in pulp ——> LEADS TO ——–> sclerotic 3 REACTIONARY dentin deposited

51
Q

where is the PRE-cavitated zone

A

DEJ -> pulp

52
Q

what is in the pre-cavitated zone

A
  1. body of lesion
  2. sclerotic zone (translucent zone)
    reactive dentin too
53
Q

what is b/w the DEJ and sclerotic zone. has demineralization and some remineralization or caries arrested

A

BODY of lesion

54
Q

what is a hypermineralized region also called the translucent zone

A

SCLEROTIC zone

55
Q

what is the POST-cavitated zone

A

enamel and dentin become cavitated and acid and bac enter the dentin tubules to cause further destruction

56
Q

what is in the OUTER layer of the POST-cavitated zone

A
  1. zone of destruction/necrotic dentin
  2. zone of penetration/contamination
57
Q

what is the OUTER layer of the POST-cavitated zone

A

INfected dentin. soft and wet

58
Q

what zone has IRREVERSIBLE collapse of collagen matrix and tubules destroyed (soft)

A

zone of destruction/necrotic dentin

59
Q

what is the INNER layer of the POST-cavitated zone

A

gradient of demineralization of matrix. AFFECTED dentin = leathery and firm

60
Q

what zone is in the INNER layer of the POST-cavitated zone

A

zone of demineralized sclerotic

little bac here but still have acid present and sound dentin as well as tertiary dentin

61
Q

signs of REversible pulpitis

A

COLD and NON-spont

62
Q

signs of IR-reverisble pulpitis

A

WARM and SPONT

63
Q

signs of necrotic pulp

A

no reponse due to lack of blood supply

64
Q

T/F pulp inflam can lead to external root reabsorption

A

FALSE!! INTERNAL root reabsorption

external would be due to trauma/ infection to PDL

Oral Histology (12 decks)

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