Brainscape's Knowledge GenomeTM

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


See full index

ORTHO MIDTERMS > Ortho Lec 1st quiz > Flashcards

Ortho Lec 1st quiz Flashcards

1
Q

what are the 2 kinds of tooth movement?

A
  1. Physiologic tooth migration
  2. Orthodontic tooth movement
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

This is the movement of the tooth as part of normal processes in growth and development.

A

Physiologic tooth migration

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

Naturally occurring tooth movements take place during and after ___

A

Tooth eruption

why?
-There is no application of any orthodontic forces and yet the tooth is moving due to the presence of physiologic force.

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

FACT : The physiologic force is said to be equivalent to the capillary pulse pressure that is 20-26 g/cm2 of root surface.

A

Examples of physiologic tooth movement are mesial drifting, eruption, and changes in tooth position during mastication.

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

Orthodontic tooth movement, on the other hand, is brought about by _____ which varies according to the type of movement desired.

A

orthodontic force

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

how orthodontic tooth movement occurs? there should always be an___

A
  1. Pressure (PRESSURE SIDE)
  2. Area of tension (TENSION SIDE)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where the tooth is moving to ___

A

Pressure side

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

Behind the movement is ____

A

Tension side

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

Osteoclasts are present in ___

A

Pressure side

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

Osteoblasts are present in ____

A

Tension side

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

Bone resorption occurs in ___

A

Pressure side

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

Bone deposition occurs in

A

Tension side

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

_____ is a phenomenon observed in many crystalline materials in which a deformation of the crystal structure produces a flow of electric current as electrons are displaced from one part of the crystal lattice to another

A

Piezoelectricity

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

Bone mineral and collagen are ___

A

piezoelectric

means?????

they can be moved by electric signals.

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

Piezoelectric signals have two unusual characteristics: and these are

A
  1. a quick decay rate, and
  2. the production of an equivalent signal, opposite in direction, when the force is released.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The periodontal ligament (PDL) is composed of a _______ that surrounds the tooth root and connects it to the inner wall of the alveolar bone.

A

complex vascular and highly cellular connective tissue

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

It is a soft connective tissue that surrounds the root of a tooth occupying the space between the root of a tooth and the walls of the alveolar bone and that of gingiva.

A

complex vascular and highly cellular connective tissue

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

The functions of the periodontal ligament: in terms of supportive

A

Protective cushion

19
Q

The functions of the periodontal ligament: in terms of formative

A

storehouse of cells

20
Q

The functions of the periodontal ligament: in terms of Nutritive

A

source of nutrients

21
Q

The functions of the periodontal ligament: in terms of Sensory

A

sensory plexus

22
Q

Dentoalveolar unit, is consists of these and greatly affected by the orthodontic force applied

A
  1. Cementum
  2. PDL
  3. Alveolar bone proper
23
Q

Light forces : Compressed PDL

A

Pressure side

24
Q

Light forces : Fluid expressed from PDL space

A

Pressure side

25
Q

Light forces : Decreased blood flow

A

Pressure side

26
Q

Light forces : Bone deformation allows release of prostaglandins that stimulates osteoclastic and osteoblastic activity

A

Pressure side

27
Q

Light forces :
It takes about 48 hours before the first osteoclast appear which may arrive in 2 waves:

  1. From local cellular population
  2. From distant areas via blood flow
A

Pressure side

28
Q

Light forces:

Frontal resorption occurs on the immediate site of pressure

Tooth movement begins

A

Pressure side

29
Q

Light forces : Stretched PDL

A

Tension side

30
Q

Light forces : PDL space becomes enlarged

A

Tension side

31
Q

Light forces : Increased vascularity leads to mobilization of osteoblast and fibroblast in those area

A

Tension side

32
Q

Light forces : Appearance of osteoblasts from progenitor cells in the PDL

A

Tension side

33
Q

Light forces : Remodeling activity occurs

A

Tension side

34
Q

Heavy Forces : Blood vessels totally occluded

A

Pressure side

35
Q

Heavy forces : Blood supply to the PDL is cut off

A

Pressure side

36
Q

Heavy forces : PDL mangled/distorted

A

Pressure side

37
Q

Heavy forces : Formation of a hyalinized area (avascular)

A

Pressure side

38
Q

Heavy forces : Undermining resorption occurs wherein attack is from the underside of the lamina dura

A

Pressure side

39
Q

Heavy forces : Osteoclasts are activated

A

pressure side

40
Q

Heavy forces : Tooth moves within 7-14 days (delayed)

A

pressure side

41
Q

Heavy forces : Increase in blood flow

A

Tension side

42
Q

Heavy forces : PDL fibers are torn

A

Tension side

43
Q

Heavy forces : Bone deposition by osteoblasts

A

Tension side

ORTHO MIDTERMS (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions