Brainscape's Knowledge GenomeTM

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


See full index

Oral Biology > bds2 periodontium > Flashcards

bds2 periodontium Flashcards

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

function of the periodontium

A
  • retain tooth in the socket
  • resist masticatory forces
  • defensive barrier to protect tissues against threats from the oral environment
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is junctional epithelium

A

physical barrier separating the body tissues from the oral environment

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

describe acellular cementum

A

extrinsic fibre cementum
collagen fibres from periodontal ligament
cervical 2/3 of roots

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

describe cellular cementum

A

intrinsic fibre cementum
intrinsic collagen fibres parallel to the surface
play no role in tooth attachment and this can represent a transitional form

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

what is the cortical plate of alveolar bone

A

this is the part of alveolar bone that forms the inner lining of the tooth socket

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

what are volkmanns canals

A

nutrient canals that penetrate the alveolar bone

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

what is a residual ridge

A

when teeth are lost the alveolar process is resorbed and this leaves the ridge

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

components of the periodontal ligament matrix include

A

hyaluronate glycosaminoglycans

glycoproteins eg fibronectin
proteoglycans eg proteodermatan sulphate, or chondroitin sulphate

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

what is the main property of the periodontal ligament matrix

A

behave as a viscoelastic gel

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

list the sensory nerves of the periodontal ligament

A

mechanoreceptors (a beta and a delta fibres)
- these are rapidly or slowly adapting
- responsible for proprioception and control of chewing

nociceptors (a delta and C fibres)
- protective reflexes to inhibit the jaw elevator motor neurons

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

explain the sympathetic aspect of periodontal ligament innervation

A

blood vessel control and vasoconstriction

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

explain the blood supply of the periodontal ligament

A

from the inferior and superior alveolar arteries, passing into the periodontal ligament from the alveolar bone

also comes from the lingual and palatine arteries to supply the gingivae

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

what is true periodontal ligament

A

fibres connecting tooth to bone at/apical to the alveolar crest

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

what is the gingival ligament

A

fibres mainly above the alveolar crest including free gingival fibres

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

what is the width of the periondontal ligament

A

0.2mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

function of oxytalan fibres in the periodontal ligament

A

present in the human periodontal ligament although the function is uncertain

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

are there elastic fibres in the periodontal ligament of humans

A

no

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

principle fibre groups in the alveolodental ligament

A

alveolar crest
horizontal
oblique
apical
interradicular ( only in multi rooted teeth )

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

what are the principle fibre groups in the interdental ligament

A

the transseptal fibres

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

describe the gingival fibre group

A

supports the free gingivae

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

what are the intrusive forces that the periodontal ligament is subjected to

A

mastication
swallowing
speech
parafunction

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

what are extrusive forces

A

sticky foods and orthodontic forces

24
Q

which two elements are the anchors of the periodontium

A

the tooth and the alveolar bone

25
Q

which tissue is the most complicated organised tissue in the body and why is that

A

the periodontal ligament because of the tissues associated with it

26
Q

what are the black dots in a ground section

A

where the cells once were

27
Q

which type of cementum is responsible for tooth attachment

A

acellulular

28
Q

where is acellular cementum absent

A

furcation regions

29
Q

what are the mechanoreceptors of the PDL associated with

A

fine tuning of the softness or hardness of the food being chewed

30
Q

which PDL fibres are only found in the multi rooted teeth

A

inter radicular

31
Q

which fibres cross the space and connect tooth to tooth

A

trans septal

32
Q

which fibres run around the tooth

A

alveologingival fibres

33
Q

what is the much gingival junction

A

the subdivision between attached gingiva and alveolar mucosa is called the mucogingival junction

34
Q

what is the length of the muco gingival junction relevant for

A

treatment and evaluating the progression of periodontal disease

35
Q

why should the lips be pulled back when taking an impression

A

to extend the alveolar mucosa to show a good picture of the muco gingival junction where the gingival is attached

36
Q

what is the enamel cuticle

A

decalcified section where enamel is removed. coating of enamel when the tooth is prepared and there is some remainder

37
Q

describe free gingiva

A

has a sulcus or crevice containing crevicular epithelium covering the sulcus. not attached to enamel to form the sulcus

junctional epithelium is attached to the tooth and is the most important tissue to highlight as it attaches the gingiva to the tooth and has a special attachment - the basal laminate has one internal and one external with hemidesmosomes to organise the attachment of the epithelium to the enamel

38
Q

describe how oblique fibres attach

A

to the cementum, apically
to the bone, cervically

39
Q

what are the main fibres in sharpeys fibres

A

collagen type I and III

40
Q

where is acellular cementum located

A

2/3 cervical region of the root

41
Q

where is cellular cementum

A

third apical region of the root and also found on furcation regions of multi rooted teeth

42
Q

where is acellular extrinsic fibre cementum

A

2/3 cervical region of the root

43
Q

where is cellular intrinsic fibre cementum located

A

third apical region of the root and furcation regions of multi rooted teeth

44
Q

where is cementum thicker

A

apical region

45
Q

describe the route of principle oblique fibres and the reason for this

A

wavy line form cementum to bone to provide further elastic resilience to the fibres as they transfer the energy from the tooth to the bone

46
Q

which cells are found at the surface of cementum

A

cementocytes

47
Q

what is the main cell type at the centre of the periodontal ligament

A

fibroblasts

48
Q

where are sharpey fibres bundled more closely

A

cementum, spread at the bone to dissipate masticatory forces and protect the bone

49
Q

what are the advantages of horizontal fibers

A

responsible for dealing with lateral forces that the tooth dissipates to the bone during masticatory excursions. powerful forces as you have to slide on tooth against the other as well as then cutting food

50
Q

why is changing the root rotational arrangement important

A

when teeth need to be rotated, the root rotation must be changed as horizontal fibres will be stretched and bring the tooth back if there is no maintenance to allow the fibres to rearrange themselves

51
Q

what is responsible for periodical cysts during tooth development

A

epithelial cell rests of malassez

52
Q

group of principle fibres attaching cementum from one tooth to the adjacent tooth.

A

Transseptal fibre

53
Q

Teeth cementum to gingiva

A

dento gingival fibres

54
Q

Teeth to connective covering of the bone and periosteum

A

dento periosteal

55
Q

Alveolar bone to gingiva

A

alveolo gingival

56
Q

what is the dento gingival junction

A

Boundary between the oral cavity and the underlying connective tissue of the tooth supporting tissues.

57
Q

why is oral gingival epithelium easiest to identify

A

due to keratin and functional role in mastication

Oral Biology (27 decks)

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