Growth Predictions- FINAL Flashcards

1
Q

When there a good ratio between the height and width of your face:

A

normocephalic

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2
Q

When there is a longer length of the face in relation to the width of the face is much longer:

A

dolychocephalic

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3
Q

Dolychocephalic patients tend to be harder to:

A

predict growth

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4
Q

Brachiocephalic (patients that show with a class II division II malocclusion)- a very square face- meaning the:

A

height to width ratio are almost equal (B. Mlekus)

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5
Q

The easiest predictability of growth is with ___ patients:

A

Normochepaplic

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6
Q

Angle that is a good growth predictor as it tends to stay stable throughout life:

A

mandibular plane angle

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7
Q

____ axis is a good predictor of growth

A

Y-axis

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8
Q

Bjork studies state that: “patients tend to keep growth pattern _____”

A

patients tend to keep growth pattern constant (if you start at normocephalic you tend to stay that way)

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9
Q

The mandibular plane line creates an angle with

A

the anterior aspect of the cranial base

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10
Q

The angle between the mandibular plane line and the anterior aspect of the cranial base=

A

mandibular plane angle

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11
Q

The more normal the mandibular plane angle is, the more:

A

predictable the growth pattern will be

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12
Q

From the cranial base the face will grow:

A

down & forward toward the maxilla

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13
Q

The center of the cranial vault:

A

sella

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14
Q

In a class III malocclusion we try to minimize the growth of the ____ and maximize the growth of the ___.

What about for class II?

A

mandible; maxilla

Opposite

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15
Q

What can we assume with a MP angle and Y-axis that are not normal:

A

altered growth (Not predictable)

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16
Q

With growth enhancement, we are typically looking at:

A

a class II or III malocclusion

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17
Q

For a class III malocclusion, we try to increase ____ length.

For a class II malocclusion, we try to increase ___ length.

A

class III= maxilla

class II= mandible

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18
Q

Can we modify growth?

A

yes- but not as much as we wish

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19
Q

Is chronological age a good predictor?

A

yes- but take it with a grain of salt

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20
Q

When is the window of opportunity to modify growth?

A

9-13

21
Q

Growth spurts for girls:

A

10-12

22
Q

Growth spurts for boys

A

12-14 (until 17)

23
Q

In order to modify growth, you must first:

A

experience growth

24
Q

What are two factors to take into consideration with growth spurts?

A
  1. timing of correction
  2. length of treatment
25
Q

The functional matrix considers that growth is determined by:

A

genetics and epigenetics

26
Q

Stimulation of periostea growth by alteration of neuromuscular environment. This appliance will stimulate periosteal pull and bone apposition.

A

frankl appliance

27
Q

The frankl appliance is considered a ____ appliance because it is not tied down to the dentition.

A

Not tooth borne appliance

28
Q

The Frankle appliance rational is based on ____ because you are changing ___.

A

the functional matrix; the environment

29
Q

What type of growth does the Frankie appliance harvest:

A

intramembranous

30
Q

Maxillary expander appliance modifies the growth at the:

A

mid-palatal suture (above the teeth)

31
Q

Up to how many mm does a maxillary expander expand the palate transversely?

How much can it expand the mid-palatal suture?

A

4-5mm

5-6 mm (on a good day)

32
Q

A maxillary expander is a ___ appliance

A

orthopedic

33
Q

How many mm per day does a maxillary palate expander allow?

A

0.25mm per day (1/4 of a turn)

28-30 activations

34
Q

Functional cross-bite must be corrected at:

A

a young age

35
Q

When correcting a functional cross-bite, if the side that contains the cross bite is corrected, what happens to the other side?

A

the other side will become edge-to-edge

36
Q

anteroposterior dimension is treated by:

A

Class II correction

37
Q

For true retrognatism (class II) there is:

A

NO Growth

38
Q

True retrognatism is purely:

A

skeletal & genetic

39
Q

For anteroposterior dimension treated by class II correction, what must be considered?

A
  1. the amount of dentoalveolar compensations
  2. growth potential (growth prediction)
40
Q

Can true retrognatism be corrected?

A

no

41
Q

Growth predications should take into account:

A
  • age
  • gender
  • genetics
42
Q

Slows down growth at the tuberosity level:

A

head gear

43
Q

Head gear acts at the:

A

growth site

44
Q

Head gear allows the ___ to “catch up”

A

mandible

45
Q

Head gear allows the mandible to catch up in the ____ plane

A

anterior bite

46
Q

What follows treatment with headgear?

A

normal growth pattern

47
Q

The tuberosity (where head gear acts) is a:

A

growth site

48
Q

Where does head gear slow the growth and what does this allow for?

A

slows growth of maxilla at tuberosity level allowing the mandible to catch up