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ortho 2 > aligner therapy > Flashcards

aligner therapy Flashcards

1
Q

traditional tx modality

A

brackets and bands

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2
Q

pts prefer what kind of tx looks wise>?

A

invisible (aligners)

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3
Q

what was the first kind of aligner

A

tooth positioner

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4
Q

Tooth Positioner
* Results based on?
* seq alignment?

A
  • Results based on technician
    experience
  • No sequential alignment
    available
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5
Q

sequential alignment with invialign

A

new sets of aligners used as pt progresses thru tx

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6
Q

when was invialign FDA approved

A

1998

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7
Q

pros of invisalign

A

clear, transparent, removable

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8
Q

standards of care thru ortho hx

A
  • In the 20th century . Brackets and wires were the standard of care to treat the vast majority of malocclusions
  • The 21st century has seen 3D CADCAM “become” the standard of care.
  • Invisalign is the leading company in individual CAD CAM printing.
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9
Q

invisalign age uses

A

used to be only adults but can now be used with teens/kids

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10
Q

Turning Point of aligner tx

A

\
* CAD CAM technology allows for modelization of orthodontic movements (CAD)
* Fabricate sequential aligners corresponding to the desire treatments

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11
Q

invisalign
* how old?
* Change/evolution
*improvements

A
  • This technology is 25 years old
  • Constantly changing and evolving
  • Considerable improvements over the years- 3D controls and CBCT integration
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12
Q

forces of clear aligners

A

Clear aligners push
* Clear aligners do not pull

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13
Q

akligner tx in early 2000s

  • alignment
  • Limited correction of?
  • vertical
A
  • Minor alignment
  • Limited correction of rotations
  • No predictable vertical control
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14
Q

simple force applied to crown thru aligners

A
  • The line of action is at a distance from the center of resistance (1/2 root L)
  • A moment of force is created by the force
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15
Q

force applied thru the center of R causes?

A

translation

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16
Q

force applied away from the center of R causes?

A

tipping

17
Q

are aligners on their own typicall enough? what can resolve this?

A

Aligners alone are not enough
* The majority of treatments may require the use of:
* Attachments
* Elastics
* Power ridges
* Bite ramps
* (G5 software + Smart track)

18
Q

G4 software allowed for?

A

adding attachments to the aligners to increase SA for action

19
Q

attatchments

defined?
roles?

A

Added to aligner surfaces to act as a point for forces
* Correct rotations
* Improve root movement
* Anchorage
* Extrusion

20
Q

precision cuts

A

Slits and cut outs of the aligners used for elastics
* Elastics:
* Class II mechanics
* Class III mechanics
* * Increase anchorage
* Correct midlines

21
Q

bite ramps
* Used to?
* Placed by?
* Levels? how?
* Less proclination of?

A
  • Used to open the bite
  • Placed by technician
  • Level de curve of Spee by extruding and uprighting lower molars
  • Less proclination of lower incisors
22
Q

how can we translate teeth if we cannot place for directly on the center of R?

A

usew of counter moments to cancel out tipping forces but not translational force

23
Q

Power ridges
force these are used for?
* To place?
* Placed on?
* on tooth?

A

Labio-lingual torque
* To place torque on teeth
* Placed on the aligner
* NOT on tooth surface

24
Q

Clear Aligner Therapy Advantages
* Individualized movement?
* sequence?
* Anchorage?
* vertical?
* improvements

A
  • Individualize tooth movement in 3 planes of space
  • Move teeth sequentially
  • Anchorage control
  • Disocclude teeth but still vertical control
  • Continuous technological improvement
25
Q

Most common errors of aligners
* Limiting the scope of the technique to:

A
  • Limiting the scope of the technique to:
    1. Intraoral scanning or impressions
    2. Send case to the company
    3. Automatic acceptance of Clincheck
    4. Aligner delivery to patient
    5. What to do when treatment does not proceed as planned??
    6. reliance on compliance
26
Q

what do these icons mean?

A

number in rhomboid: IP reduction
blue lines: precision cuts
red spots: attatchments

27
Q

what force can be used to incline/extrude incisors

A

torque

28
Q

REMEMBER
* Invisalign is a?
* Abide to the same biological rules?
* expansion?
* proclination?
* Orthodontic knowledge?

A
  • Invisalign is a full orthodontic appliance
  • Abide to the same biological rules as conventional brackets
  • Do not over-expand
  • Do not over-procline
  • Orthodontic knowledge before treating pts.
29
Q

Conclusions
* In less than 12 years, Invisalign has become a?
* It has revolutionized the way?
* This is only the?

A
  • In less than 12 years, Invisalign has become a recognized orthodontic modality delivering quality orthodontic appliances.
  • It has revolutionized the way orthodontic treatment is delivered.
  • This is only the beginning! We will not stop “progress”

ortho 2 (11 decks)

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