L.2 Development of the Dentition 2 Flashcards

1
Q

Spacing is good yo: more than 6mm will mean a __% chance of crowding in the permanent dentition

A

0%

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2
Q

Spacing of __-__mm in the primary dentition yields a 205 chance of crowding in the permanent dentition

A

3-6mm

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3
Q

Spacing of less than 3mm in the primary dentition yields __% probability of crowding in the permanent arch.

A

50%

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4
Q

What is the % chance of crowding in the permanent teeth id there is no spacing in the primary teeth? crowding in the primary??

A

no spacing 66%, crowding 100%!

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5
Q

Where are the two primate spaces?

A

mesial to the maxillary canine and distal to the mandibular canine

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6
Q

What is the ideal occlusion for primary teeth? What permanent class occlusal relationship will it led to ?

A

mesial step…class I

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7
Q

an exaggerated mesial step occlusion in primary teeth is most likely to lead to which class occlusion in the permanent occlusion?

A

class III

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8
Q

a distal step occlusal relationship in primary teeth is most likely to lead to what class permanent occlusal relationship?

A

class II

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9
Q

What are the ideal overbites and over jets?

A

2mm for both

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10
Q

When is the greatest spacing for primary teeth?

A

3-4 years old

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11
Q

Your strong point lol….MIXED DENTITION!!! Early- __-__ years old = incisors and first molars

A

6-9 years old

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12
Q

Your strong point lol….MIXED DENTITION!!! Late- ___-___ years old = canines, 1st, 2nd PMs

A

9-12 y/o

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13
Q

SO covering both early and late mixed dentition it is from the ages of ___-___

A

6-12 yo

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14
Q

ERUPTION FOLLOWS EXFOLIATION BY HOW LONG?

A

6 months

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15
Q

Enamel of permanent tooth complete about ___ years prior to eruption

A

3 years

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16
Q

Root formation complete about __ years after eruption (permanent teeth)

A

3 years

17
Q

Eruptive force of _______ (the freaking KEY to space mgmt) closes spaces between remaining primary molars

A

1st permanent molar

18
Q

What are the two most common primary types of occlusion?

A

1.mesial step (49%) 2. flush (37%)

19
Q

In an Angle Class I, the chin grows in which direction?

A

downward and outward

20
Q

In an Angle Class II, the chin grows in more of a _____ direction.

A

downward (vertical)

21
Q

In an angle class III, the chin grows in more of a ______ direction.

A

horizontal

22
Q

How much larger are the maxillary permanent incisors than the primaries?

A

7.6mm larger

23
Q

How much larger are the mandibular permanent incisors than the primaries?

A

6.0mm larger

24
Q

What % of 6 year olds have a diastema when their maxillary centrals erupt?

A

44-97%!!! NORMAL

25
Q

What are two reasons for diastema if it is not normal?

A

habit or frenum

26
Q

What is the eruption sequence of the permanent maxillary teeth? How is it different from mandibular?

A

6-1-2-4-5-3-7-8 (mandibular is MUCH MORE ORDERLY because the canine plays nice…6-1-2-3-4-5-6-7-8)

27
Q

What is the name for tooth size difference between the primary canines and molars and the permanent successors.

A

LEEWAY SPACE

28
Q

The difference in primary space and permanent space on the maxilla is ____mm per quadrant

A

1.5mm per quadrant

29
Q

The difference in primary space and permanent space on the mandible is ____mm per quadrant

A

2.5mm

30
Q

What is the majority of leeway space caused by?

A

E space (primary second molar)

31
Q

What is the normal E space on the max and mand?

A

max 1.5mm mand 2.0mm

32
Q

**At birth, the only permanent teeth that show traces of hard tissue formation are the ____________

A

first permanent molars

33
Q

With the exception of the third molars, all permanent teeth demonstrate hard tissue formation at @ ___ years of age…BUT when do the whizzy’s come in?

A

3 years…whizzy at 8 years

34
Q

Permanent initiation of teeth is at ___ weeks In Utero

A

20 weeks

35
Q

The permanent 1st molar first molar initiates at ___ months In Utero

A

5 months

36
Q

Permanent anterior teeth begin developing _______ to the incisal level of the primary teeth

A

LINGUAL

37
Q

As primary teeth erupt, the permanent successors are positioned lingual to the ______ third of their roots.

A

APICAL

38
Q

Premolars SHIFT from a location near the _______ area of the primary molars to a location enclosed within the _____ of the primary molars.

A

occlusal…..roots