Brainscape's Knowledge GenomeTM

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


See full index

I Oral Histology > EX2; Eruption and Shedding > Flashcards

EX2; Eruption and Shedding Flashcards

1
Q

What are the three stages of eruptions

A

preemergence
prefunctional
functional

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

What is the main direction of movement in the preemergence stage

A

facially

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

What is the main direction of movement in the prefunctional stage

A

occlusially

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

What is the main direction of movement in the functional stage

A

mesially

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

This stage starts with the appearance of dental lamina and continues to the appearance of reduced enamel epithelium and Hertwig’s root sheath, just prior to the start of root dentin formation

A

preemergence stage

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

This is the movements a tooth makes to attain and maintain its position in the jaw

A

eruption

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

Which is the only direction in which the tooth will not move

A

apically

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

The movements of eruption are a cellular activity involving different cell types of the periodontal ligament; which are

A

cementoblasts
osteoblast
osteoclast
fibroblast

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

This is the most numerous cell type of the PDL, involved in the secretion(blast) and lysis(coast) of the extracellular substance, and may become a contracting cell

A

fibroblast/clast/myocyte (myofibroblast)

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

What is the main direction of movement of the primary and secondary tooth germ

A

facially

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

What is the reduced enamel epithelium attached to the enamel surface by

A

basal lamina

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

What are the two main functions of Hertwig’s root sheath

A

determines the number of root canals and the root dentin outline

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

What is the bone crypt

A

become the alveolar process

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

This stage starts with root dentin formation and ends when tooth reached the occlusal plane

A

prefunctional stage of eruption

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

What is the main direction of movement of the pre functional stage

A

occlusially

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

What does the apical end of Hertwigs epithelial sheath continue as

A

the diaphragm; determining the number of root canals

17
Q

Where is the reduced enamel epithelium in relation to Hertwig’s root sheath

A

it is over/above it

18
Q

During the root sheath diagram stage, what happens

A

the number of root canals is determined

tooth erupts occlusially from this level

19
Q

During the root sheath elongating, what happens

A

determines root dentin outline

diaphragm remains at the relatively same level

20
Q

What happens upon the root dentin forming

A

the sheath breaks up; cementum forms on exposed dentin

21
Q

These are remnants of epithelial cells from Hertwig’s root sheath in the periodontal ligament, appearing during the pre functional stage of eruption

A

Epithelial rest of Malassez

22
Q

During the pre functional stage, what happens to the merged oral epithelium and the reduced enamel epithelium

A

they undergo cell death

23
Q

What does the reduced enamel epithelium become

A

junctional epithelium

24
Q

The basal lamina is considered this type of basement membrane

A

“double” basement membrane

it extended around the entire junctional epithelium

25
Q

True or False

the basal lamina can attach to dentin

A

False; this also affects implants

26
Q

What is the arrangement of collagen fiber bundles of the PDL

A

onliquely

27
Q

This stage starts at the occlusal plane and physiologically continues throughout life

A

functional stage

28
Q

What is the main movement in the functional stage

A

mesially

29
Q

What are the changes to the junctional epithelium during functional eruption

A

attached to enamel
attached to enamel and cementum
attached to cementum

30
Q

Functional arrangement of the principal fiber bundles of PDL occurs during which stage

A

functional stage

31
Q

During the functional stage, what changes occur to dentin

A

attrition
dead tracts
reparative (tertiary) dentin

32
Q

What are the changes during the functional stage of eruption

A

continued dentin formation
reduced pulp tissue volume
ectopic mineralization

33
Q

This is the physiologic elimination of primary teeth caused by the resportive action of osteoclasts

A

shedding

34
Q

Where does the odontoclast originate

A

in the bone marrow

35
Q

If the reduced enamel epithelium comes in close contact to the osteoclast cells, what could occur

A

it could break down and cause the enamel to damage

I Oral Histology (16 decks)

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