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ABO pt 2 > Norms > Flashcards

Norms Flashcards

1
Q

SNA

A

82

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2
Q

SNB

A

80

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3
Q

ANB

A

2

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4
Q

SN-MP

A

32

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5
Q

FMA

A

24

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6
Q

IMPA

A

93

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7
Q

U1-SN

A

103

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8
Q

U1-NA

A

4

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9
Q

L1-NB

A

4

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10
Q

U lip - E line

A

-6

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11
Q

L lip - E line

A

-2

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12
Q

What is SMI 6?

A

peak statural growth

Capping of the third finger, middle phalanx occurs

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13
Q

What is SMI 7?

A

Peak jaw velocity

capping of the fifth finger, middle phalanx occurs

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14
Q

About how much growth remains at SMI 6?

A

3 more years

25-65%

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15
Q

What is the ratio of vertical condylar growth to horizontal condylar growth?

A

8:1 mm ratio Vert:hor growth

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16
Q

Combined, the U and L 6s erupt ~ ___mm per year.

A

2 (1mm each)

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17
Q

Except for gonial angle, most angles will change < ___ degrees during 2.5 years of treatment

A

1 degree

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18
Q

True or false… SNA does not change significantly with growth. Therefore, if you see a change in SNA it is due to treatment

A

true

maxilla and nasion keep pace with each other.

19
Q

What is are the ANB norms for the following ages?

6
9
12
15

A

6yo = 4-5 degrees
9yo = 3-4 degrees
12yo = 3-4 degrees
15yo = 2-3 degrees

20
Q

How much does SNA change per year due to growth?

A

0.1 degree

21
Q

How much does SNB change per year due to growth?

A

0.2 degrees

22
Q

How much does ANB change per year due to growth?

A

-0.1 degree

23
Q

How much does SN-MP change per year due to growth?

A

-0.3 degrees

24
Q

How much does FMA change per year due to growth?

A

-0.3 degrees

25
Q

How much does the Y-axis change per year due to growth?

A

-0.1 degree

26
Q

How much does ANS-PNS change per year due to growth?

A

+ 0.8mm

27
Q

How much does Co-Me (Mn length) change per year due to growth?

A

+2.3mm

28
Q

How much does Ar-Go-Me (Gonial angle) change per year due to growth?

A

-0.6 degrees

29
Q

How much does N-ANS (UAFH) change per year due to growth?

A

+1.2mm

30
Q

How much does ANS-Me (LAFH) change per year due to growth?

A

+1.0mm

31
Q

How much does S-N-ANS change per year due to growth?

A

+0.1 degree

32
Q

How much does S-N-Pg change per year due to growth?

A

+0.3 degrees

33
Q

How much does ANS change per year due to growth?

A

0.7mm anterior/year

34
Q

How much does Pg change per year due to growth?

A

0.8mm anterior/year

35
Q

Describe the changes seen in Condylion per year due to growth.

A

0.5mm posterior/year
0.3mm inferior/year

36
Q

How much should you expect the molars and incisors to erupt per year naturally?

A

1mm

37
Q

How much should you expect the molar to drift mesially per year naturally?

A

0.5mm

38
Q

How much should you expect the incisor to move horizontally per year naturally?

A

0.3mm

39
Q

When you are looking at the mandibular superimposition, how much vertical change should you see in Condylion?

A

2.3mm superior per year

40
Q

When you are looking at the mandibular superimposition, describe how much change you should see in Gonion due to growth.

A

1mm posterior per year

0.9mm superior per year

41
Q

When you are looking at the maxillary superimposition, describe what changes you should see in the orbital floor due to growth.

A

0.3mm superior per year
0.3mm posterior per year

42
Q

When you are looking at the maxillary superimposition, describe what changes you should see in PNS due to growth.

A

0.7mm posterior per year
0.3mm inferior per year

43
Q

When you are looking at the maxillary superimposition, describe what changes you should see in ANS due to growth.

A

0.1mm anterior per year
0.6mm inferior per year

44
Q

When you are looking at the maxillary superimposition, describe what changes you should see in A point due to growth.

A

0.6mm inferior per year

ABO pt 2 (3 decks)

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