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Ortho final > Week 3 Generalized space shortage > Flashcards

Week 3 Generalized space shortage Flashcards

1
Q

Generalized space shortage

A

True shortage of space including leeway

tooth movement methods will create the space

prognosis and stability are unknown (retention is mandatory)

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2
Q

Generalized space shortage

A

True shortage of space including leeway

tooth movement methods will create the space

prognosis and stability are unknown (retention is mandatory)

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3
Q

Moderate generalized space discrepancy is when _________

A
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4
Q

First thing to consider with moderate generalized space discrepancy

A

arch expansion; this is NOT palatal expansion, but expanding the circumference of the arch
creating up to 4-5mm of space

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5
Q

Alternative to arch expansion

A

take out 2 permanent teeth. premolars average about 7mm M-D width, so if you take out 2 premolars, you’d free up 14mm of space

so if you’re looking for creation of 4-5mm of space, that means you’d have to close 9-10mm of space if you extract!

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6
Q

Perform arch expansion based on:

A
  1. Lips and incisors ap position: WNL or retrusive
  2. Facial keratinized tissue: Adequate
  3. Overbite
  4. Overjet
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7
Q

Consider arch expansion if….

A

Skeletal class 1 (best candidate)

Dental class 1 or E-E molar

All teeth present

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8
Q

Treatment options for moderate generalized space discrepancy

A
  1. Active lingual arch
  2. Lip bumpers
  3. Banded/Bonded appliance
  4. Headgear
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9
Q

Active lingual arch for..

A

lower anterior crowding
Best for FL discrepancies
Facial tipping of incisors (best for tipping facially), distal tip of molar
NO good for rotation

MAY increase the possibility of second molar impaction

Stability unknown.

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10
Q

Lip bumpers for….

A

Lower anterior and/or buccal segment crowding

Best for FL discrepancies
Facial tipping of incisors / migration
Distal tipping of molar
NO good for rotation

May increase possibility of 2nd molar impaction

Without lip pressure, teeth migrate in facial direction

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11
Q

Banded and Bonded fixed appliance for…

A

Lower anterior and/or buccal segment crowding.

Tipping and bodily movements are possible

Rotations can be treated

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12
Q

Headgear for….

A

Max arch only
Buccal segment crowding
Only molar movement control
Require cooperation

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13
Q

True or False?

With headgear alone, only teeth you have control over are the molars.

A

True

With long face - use high pull

short to normal face - use cervical pull

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14
Q

Severe generalized space discrepancy of >4-5 mm per arch. What do you do?

A

Extraction based on crowding and protrusion.

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15
Q

What do you do when severe generalized space discrepancy ≥ 10 mm per arch?

A

Serial extraction

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16
Q

Indications for serial extraction

A 
Class 1
Good facial form
Severe space shortage
Early loss of primary canines 
Gingival defects
Impaction imminent (close by)
17
Q

Advantages of serial extraction?

A 
spontaneous incisor alignment 
improved gingiva 
improved hygiene
improved psych
better canine position
reduce treatment/retention time 
better stability
18
Q

Disadvantages of serial extraction

A

Incisor lingual tipping
deep bite
reduced vertical growth and alveolar development
poor facial esthetics
requires future treatment
remaining teeth may not erupt or have poor form
tongue habits develop

19
Q

Usual extraction sequence for serial extraction

A
  1. Primary canine (for ant crowding and alignment)
  2. Primary first molar (when 1/2 to 2/3 of premolar root is formed to expedite eruption)
  3. First premolar (to provide space in the permanent dentition)
20
Q

Moderate generalized space discrepancy is when _________

A
21
Q

First thing to consider with moderate generalized space discrepancy

A

arch expansion; this is NOT palatal expansion, but expanding the circumference of the arch
creating up to 4-5mm of space

22
Q

Alternative to arch expansion

A

take out 2 permanent teeth. premolars average about 7mm M-D width, so if you take out 2 premolars, you’d free up 14mm of space

so if you’re looking for creation of 4-5mm of space, that means you’d have to close 9-10mm of space if you extract!

23
Q

Perform arch expansion based on:

A
  1. Lips and incisors ap position: WNL or retrusive
  2. Facial keratinized tissue: Adequate
  3. Overbite
  4. Overjet
24
Q

Consider arch expansion if….

A

Skeletal class 1 (best candidate)

Dental class 1 or E-E molar

All teeth present

25
Q

Treatment options for moderate generalized space discrepancy

A
  1. Active lingual arch
  2. Lip bumpers
  3. Banded/Bonded appliance
  4. Headgear
26
Q

Active lingual arch for..

A

lower anterior crowding
Best for FL discrepancies
Facial tipping of incisors (best for tipping facially), distal tip of molar
NO good for rotation

MAY increase the possibility of second molar impaction

Stability unknown.

27
Q

Lip bumpers for….

A

Lower anterior and/or buccal segment crowding

Best for FL discrepancies
Facial tipping of incisors / migration
Distal tipping of molar
NO good for rotation

May increase possibility of 2nd molar impaction

Without lip pressure, teeth migrate in facial direction

28
Q

Banded and Bonded fixed appliance for…

A

Lower anterior and/or buccal segment crowding.

Tipping and bodily movements are possible

Rotations can be treated

29
Q

Headgear for….

A

Max arch only
Buccal segment crowding
Only molar movement control
Require cooperation

30
Q

True or False?

With headgear alone, only teeth you have control over are the molars.

A

True

With long face - use high pull

short to normal face - use cervical pull

31
Q

Severe generalized space discrepancy of >4-5 mm per arch. What do you do?

A

Extraction based on crowding and protrusion.

32
Q

What do you do when severe generalized space discrepancy ≥ 10 mm per arch?

A

Serial extraction

33
Q

Indications for serial extraction

A 
Class 1
Good facial form
Severe space shortage
Early loss of primary canines 
Gingival defects
Impaction imminent (close by)
34
Q

Advantages of serial extraction?

A 
spontaneous incisor alignment 
improved gingiva 
improved hygiene
improved psych
better canine position
reduce treatment/retention time 
better stability
35
Q

Disadvantages of serial extraction

A

Incisor lingual tipping
deep bite
reduced vertical growth and alveolar development
poor facial esthetics
requires future treatment
remaining teeth may not erupt or have poor form
tongue habits develop

36
Q

Usual extraction sequence for serial extraction

A
  1. Primary canine (for ant crowding and alignment)
  2. Primary first molar (when 1/2 to 2/3 of premolar root is formed to expedite eruption)
  3. First premolar (to provide space in the permanent dentition)

Ortho final (20 decks)

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