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D2 Summer - Growth & Development Final > 7 - Primary Dentition > Flashcards

7 - Primary Dentition Flashcards

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1
Q

This type of dentition is also known as “Interceptive orthodontics”

A

Mixed dentition

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2
Q

How many deciduous teeth are there?

A

20

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3
Q

How many teeth come from successional lamina?

A

20

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4
Q

Primary detention + Permanent molars =

A

Mixed dentition

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5
Q

What primary and permanent teeth make up “mixed dentition”?

A

Primary teeth + permanent molars

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6
Q

What age range do permanent teeth erupt?

A

6 to 13

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7
Q

How many permanent teeth are there?

A

32

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8
Q

What teeth are typically the last to erupt according to retrouvey for primary teeth?

A

Canines

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9
Q

Do permanent or primary dentitions have symmetrical crown shapes?

A

Primary

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10
Q

Do primary or permanent teeth have more variability?

A

Permanent

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11
Q

What are the characteristics of deciduous teeth?

A
  1. Symmetrical crown shapes
  2. Interdental shaping
  3. No angulation of incisors
  4. Less variability than permanent
  5. Arch width changes with growth
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12
Q

What are interdental spaces called?

A

Diastemas

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13
Q

If you have poor malocclusion in primary teeth, does the condition improve with permanent teeth?

A

No, it worsens

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14
Q

Is having interdental spacing or “diastemas” good?

A

Yes

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15
Q

Why is having interdental spacing good?

A

Permanent incisors require much more space

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16
Q

What spaces are found mesial to the upper cuspids and distal to lower cuspids in primary dentition?

A

Primate spaces

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17
Q

In what dentition are “Primate spaces” found?

A

Primary dentition

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18
Q

Where are “Primate spaces” found?

A

Mesial to upper cuspid
Distal to lower cuspid

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19
Q

What will occur if there are NO interdental spaces in the deciduous dentition?

A

Crowing of permanent teeth (75%)

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20
Q

________ between anterior primary teeth are important for permanent incisor eruption

A

Diastemas

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21
Q

How do the upper and lower incisors of primary teeth tend to erupt?

A

Upper incisors = labial
Lower incisors = lingual

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22
Q

When upper incisors erupt labial, what do they do to the arch?

A

Increase size

23
Q

Which arch is known as the “diagnostic” arch?

A

mandibular

24
Q

Are there increases in arch size during the eruption of permanent incisors?

A

No

25
Q

Do eruptions of permanent incisors cause an increase in arch size?

A

No

26
Q

Are primary teeth smaller or larger than permanent?

A

Anterior primary = smaller
Molars = larger

27
Q

What is the largest tooth in primary dentition?

A

2nd primary molar

28
Q

Which primary teeth are typically larger than permanent teeth?

A

Posterior teeth

29
Q

Which primary teeth are typically smaller than permanent teeth?

A

Anterior teeth

30
Q

What is the size of the Upper second premolar?

A

7mm

31
Q

What is the size of the Upper second primary premolar?

A

8.2mm

32
Q

What is the size of the Lower second premolar?

A

7mm

33
Q

What is the size of the Lower second primary premolar?

A

10mm

34
Q

This is an imaginary surface that passes through the occlusion of the teeth

A

Occlusal plane

35
Q

The maxillary occlusal plane passes through what?

A

Occlusal cusps of posterior teeth and incisal edges of maxillary incisors

36
Q

The mandibular occlusal plane passes through what?

A

Tangent to the occlusal cusps of posterior teeth and incisal edges of incisors

37
Q

How are primary teeth positioned to the occlusal plane?

A

90*

38
Q

Are primary or permanent teeth positioned 90 degrees to the occlusal plane?

A

Primary teeth

39
Q

What is the curve of spee in the primary dentition?

A

Flat

40
Q

If there is a Curve of spee present in primary teeth, what will occur?

A

Severe malocclusion

41
Q

Dentoalverolar compensations are __________ in deciduous dentition

A

Not fully expressed

42
Q

Why is there less variability in occlusal relationships with deciduous dentition?

A

Dentoalveolar compensation is not fully expressed

43
Q

If a malocclusion is diagnosed in the primary dentition, it will most probably get _____ during growth

A

Worse

44
Q

What are the occlusal relationships in deciduous dentition?

A
  1. Upper and lower incisors are vertical
  2. Minimal overbite and overjet
  3. Upper canine tip is positioned in the embrasure between the lower canine and the first primary molar
45
Q

What class of occlusion do deciduous teeth typically have?

A

Class 1

46
Q

What % of coverage does overbite have on primary teeth?

A

10-30%

47
Q

What overjet does primary dentition have?

A

1-2mm

48
Q

In deciduous dentition, normal occlusal changes are due to what?

A

Skeletal growth

49
Q

In deciduous dentition, are normal occlusal changes due to dental changes?

A

no

50
Q

What is an ectopic dental eruption?

A

Teeth erupt in wrong place

51
Q

Can an ectopic dental eruption lead to malocclusion?

A

Yes

52
Q

Are missing primary teeth common?

A

No, they are rare

53
Q

Are missing permanent teeth common?

A

Yes

D2 Summer - Growth & Development Final (11 decks)

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