Perio 2 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

origins of cementum

A

cells in dental follicle become cementoblasts. Either HERS or dentin induces cells to become cementoblasts or HERS cells become cementoblasts themselves.
HERS that breaks off = rests of malassez, remain attached become enamel pearls

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

Cementum composition

A

similar to bone, thinner at CEJ and thicker at apex, light yellow color, hydroxyapatite, most organic is collagen type 1, few type 3 and 12.
50% organic 50% inorganic

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

CEJ

A

60% overlap
30% meet
10% gap

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

cementum types

A
  • acellular (primary) no cells inside it. extrinsic fibers. attachemnt. coronal 2/3
  • cellular (secondary) intrinsic fibers apical 1/3- adaption/repair
  • classified by presence of encapsulated cells and predominant origin of collagen fibers
  • collagen fibers either extrinsic from PDL or intrinsic form cementoblasts
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

acellular extrinsic fiber cementum formation

A

primary
cementoblasts send process into predentin and produce collagen fibers (fibrous fringe)
forms CDJ
collagen fibers from PDL merge with fibrous fringe and mineralize
cementoblasts end up on surface of cementum

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

cellular intrinsic fiber cementum formation

A

starts similar with intermingling to create CDJ, cementoblasts become trapped in advancing cementum, cementoid visible at surface, frist rapid stage of growth then slower regular deposition.
collagen fibers produced by cementoblasts not pdl

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

intermediate cementum

A

betwen granular layer of tomes and dental cementum proper
minerlaized level higher
may function to seal surface of root dentin and to reduce sensitivity

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

mixed cementum

A

alternating layers of AEFC and CIFC
generally located apically
perhaps a bunch of secondary cementum is actually mixed

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

hypercemntosis

A

abnormal thickening of cementum, diffuse or circumferential around whole root
can affect entire dentition or just portions of one tooth
tooth can become ankylosed

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

tooth movement

A

cementum is more resistant to resorbtion than bone

so bone tends to get remodeled first

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

tipping

A

tooth crown and apex go different ways

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

bodily

A

whole tooth goes one way

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

extrusive

A

movement towards occulsal surface

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

intrusive

A

movement towards apices

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

rotational

A

tooth twist

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

factors that determine the degree of effect of the applied force

A

transduction: efficiency of the conversion of physical force into biological response
time- how long its applied
magnitude of force- degree of force determines response

17
Q

compression

A

on side of tooth towards movement

resoprtion of alveolar bone

18
Q

tension

A

on opposite side of tooth where bone is moving

formation of alveolar bone

19
Q

hyalinization

A

too great or rapid compression force
loss of cell activity and vasculariuty
PDL has to repopulate before moving continues

20
Q

undermining resorption

A

occurs in conjugation with hyalinization

resorption occurs on opposite surface of compressed bone