lecture 2 Flashcards

1
Q

when should interceptive ortho be done

A

when all four first molars are present and 8 incisors (permanent)

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2
Q

time frame for interceptive ortho

A

about 4 years to work

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3
Q

Interceptive orthodontics

A
  • Treatments in the mixed dentition aimed at improving esthetics and function during active dentoalveolar development
  • Space maintenance
  • Eruption guidance
  • Crossbite corrections
  • No comprehensive treatment done at that time
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4
Q

Interceptive orthodontics
1. Timing

A
  1. Not a prolonged treatment!
  2. Start at the appropriate time
  3. Correct the issue and observe until comprehensive treatment can be initiated
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5
Q

*Space maintenance

A

can use appliances to maintain space in mixed arches ex; lingual arch

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6
Q

Interceptive treatment
*Correction of inclinations

A

*Limited bracketing can help in correcting poor inclination of incisors.
only done fr 6 months to a year

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7
Q

ways for minor tooth movement in adult

A
  • Invisalign
  • In house aligners
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8
Q

spacing goal

A

optomize it

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9
Q

occlusal plane goal

A

functional

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10
Q

is ortho tx only one discipline

A

no, interdisciplinary

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11
Q

*Molar uprighting

A

usually not minor tooth movement

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12
Q

Proffitt and Akerman improved?

A

Proffitt and Akerman improved the Angle
classification.
Three dimensions of space
* Anteroposterior
* Vertical
* Transverse
Time: Growth or aging= 4th plane

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13
Q

First Dimension: Anteroposterior (sagittal)

A

*Follow angle’s principles
* Classification of the molar relationship
* “Classify the canine relationship”, between man C and PM1= class 1

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14
Q

First Dimension: Anteroposterior (sagittal) measurement

A

*Overjet:
* Etiologies
* Skeletal: Involve one or 2 jaws
* Dentoalveolar ( dental): Involve upper and or lower incisors
* Positive overjet
* Negative overjet
* measured from labial to labial

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15
Q

overjet scale

A

*0mm : End to end occlusion
*2mm : Normal overjet
*4mm : Light overjet
*6mm : Moderate overjet
*8mm : Severe overjet
*10mm: Excessive overjet
*Reverse overjet

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16
Q

Second Dimension: Vertical Dimension measurement

A

Overbite
0% 10% 25% 50% 75% 100%
Amount of coverage of the lower incisor crown by
the upper incisor in maximum interdigitation
(percentage)
ideally 20%

17
Q

most important factor of overjet

A

etiology, easier to tx dentoalveolar issues

18
Q

most dif/unpredictable dimension

A

vertical

19
Q

Third Dimension: Transverse
Dimension

A

*Width of the arch
*Arch form
*According to Proffit,30% of adult patients present with a transverse discrepancy

20
Q

Arch width and form

A

Widths
*Normal
*Narrow
*Wide

Forms
*Tapered,
*“Normal”,
*Square

21
Q

is arch size or shape more important

A

shape

22
Q

how many planes do malocclusions exist in?

A

3