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AU13 - Oral Anatomy > Oral Anatomy Final - Primary Dentition > Flashcards

Oral Anatomy Final - Primary Dentition Flashcards

questions taken from lecture powerpoints

1
Q

What are the functions of primary (deciduous) teeth?

A
  • chewing (mastication)
  • support for lips and cheeks
  • formulation of speech
  • maintain arch space and room for secondary teeth
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2
Q

What tooth type is present in secondary dentition, but not present in primary dentition?

A

premolars

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3
Q

What range of adult teeth (in universal numbers) replace maxillary primary teeth A-J?

A

4-13

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4
Q

What range of adult teeth (in universal numbers) replace mandibular primary teeth K-T?

A

20-29

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5
Q

What is the definition of succedaneous teeth? Of non-succedaneous teeth? Give an example of a non-succedaneous tooth.

A

Succedaneous teeth replace primary teeth.
Non-succedaneous teeth do NOT replace primary teeth because they erupt distally to the primary teeth. All of the secondary molars are examples of non-succedaneous teeth.

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6
Q

When do primary teeth crowns form?

A

4-6 months in utero

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7
Q

At what age are all primary teeth erupted?

A

age 2-3

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8
Q

At what age are all primary roots completed?

A

approximately age 3

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9
Q

Between birth and 6 months, what teeth are erupted in the mouth?

A

none

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10
Q

Between 6 months and 2 years old, what teeth (in general) are erupting in the mouth?

A

primary teeth are erupting

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11
Q

From 2 to 5/6 years old, what teeth (in general) are erupted in the mouth?

A

only primary teeth present

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12
Q

Explain the “Rule of Three” for permanent dentition.

A

Hard tissue formation begins. After 3 years, crown formation is complete. After 3 more years, the tooth erupts. After another 3 years, the root formation is complete.

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13
Q

For PRIMARY teeth, at what age are crowns completely formed?

A

6 months (10-12 months after formation begins)

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14
Q

For PRIMARY teeth, at what age are roots completely formed?

A

1.5 to 3 years after emergence of the tooth

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15
Q

For PERMANENT teeth, between what ages are crowns forming/calcifying?

A

from birth to 16 years old

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16
Q

How many years prior to eruption are permanent crowns completed?

A

3-4 years prior to eruption

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17
Q

How many years after eruption are permanent roots completed?

A

3 years after eruption

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18
Q

What is the order of emergence of the primary teeth?

A
  1. mandibular central incisors (6 months old)
  2. other incisors
  3. first molars
  4. canines
  5. second molars (2 years old)
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19
Q

At what age do the secondary first molars erupt?

A

6 years old

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20
Q

At what age do the secondary mandibular central incisors erupt?

A

6 years old

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21
Q

Between what ages do the secondary incisors (not including mandibular central incisors) erupt?

A

7-9 years old

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22
Q

Between what ages do the secondary mandibular canines erupt?

A

9-10 years old

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23
Q

Between what ages do the secondary premolars erupt?

A

10-12 years old

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24
Q

At what age do the secondary maxillary canines erupt?

A

12 years old

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25
Q

At what age do the secondary second molars erupt?

A

12 years old

26
Q

When do the secondary third molars typically erupt?

A

late teens or early 20s

27
Q

In GENERAL, what arch tends to erupt first with secondary dentition?

A

usually mandibular arch erupts before maxillary

28
Q

Which teeth (primary or secondary) are generally whiter in color?

A

primary teeth

29
Q

True or false: Primary teeth have relatively long roots compared to crowns.

A

true

30
Q

Which teeth (primary or secondary) generally have thinner enamel and dentin layers (easier access to pulp)?

A

primary teeth

31
Q

In which direction do primary anterior teeth roots bend?

A

Primary anterior roots bend labially in the apical third to allow permanent teeth to have proper alignment.

32
Q

Is the primary maxillary central incisor wider incisocervically or mesiodistally?

A

The primary maxillary central incisor is wider mesiodistally.
*NOTE: this is different than permanent dentition

33
Q

On which primary incisors are marginal ridges most prominent?

A

maxillary central incisors; mandibular lingual anatomy is less distinct

34
Q

On which side (mesial or distal) is the curve of the CEJ greater for primary teeth?

A

mesial (like permanent dentition)

35
Q

Which proximal contact is more cervical in primary maxillary canines?

A

mesial contact is more cervical

*NOTE: this is only true for primary maxillary canines and permanent mandibular first premolar

36
Q

Which cusp ridge is longer in primary maxillary canines?

A

mesial cusp ridge is longer

*NOTE: this is only true for primary maxillary canines and permanent maxillary first premolar

37
Q

On which arch do the primary canines have marginal ridges and lingual ridges more prominent?

A

maxillary arch (like secondary dentition)

38
Q

True or false: The crown tapers toward the cervical in primary molars.

A

FALSE. The crowns taper narrower toward the occlusal with a narrow occlusal table.
*NOTE: this is different than permanent teeth

39
Q

For primary dentition, which are larger: first or second molars?

A

second molars are larger than first

*NOTE: this is different than permanent teeth

40
Q

What bulge is prominent on primary molars?

A

mesiobuccal bulge

41
Q

For a primary mandibular second molar, what buccal cusp is the widest?

A

distobuccal cusp is the widest; mesiobuccal and distal cusps are almost the same
*NOTE: this is different than the permanent mandibular first molar in which the mesiobuccal cusp is the largest and distal cusp is the smallest

42
Q

What permanent teeth do primary second molars resemble?

A

permanent first molars

43
Q

What permanent teeth do primary first molars resemble?

A

none (maxillary molars sometimes look similar to a premolar, but still not truly resembling)

44
Q

What two cusps are prominent in primary maxillary first molars?

A

mesiobuccal and mesiolingual cusps

45
Q

How many cusps are present in primary mandibular first molars? Which cusp is the largest and longest?

A

4; mesiobuccal cusp is the largest and longest

46
Q

What is the shape of the groove pattern of primary maxillary first molar?

A

“H” pattern

47
Q

Between what ages does the secondary mandibular first molar erupt?

A

6-7 years old

48
Q

Between what ages does the secondary mandibular central incisors erupt?

A

6-7 years old

49
Q

Between what ages does the secondary mandibular lateral incisors erupt?

A

7-8 years old

50
Q

Between what ages does the secondary mandibular canines erupt?

A

9-10 years old

51
Q

Between what ages does the secondary mandibular first premolar erupt?

A

10-12 years old

52
Q

Between what ages does the secondary mandibular second premolar erupt?

A

11-12 years old

53
Q

Between what ages does the secondary mandibular second molar erupt?

A

11-13 years old

54
Q

Between what ages does the secondary maxillary first molar erupt?

A

6-7 years old

55
Q

Between what ages does the secondary maxillary central incisor erupt?

A

7-8 years old

56
Q

Between what ages does the secondary maxillary lateral incisors erupt?

A

8-9 years old

57
Q

Between what ages does the secondary maxillary first premolar erupt?

A

10-11 years old

58
Q

Between what ages does the secondary maxillary second premolar erupt?

A

10-12 years old

59
Q

Between what ages does the secondary maxillary canines erupt?

A

11-12 years old

60
Q

Between what ages does the secondary maxillary second molars erupt?

A

12-15 years old

61
Q

Give an example of isomorphism.

A

The primary second molars look like the secondary first molars.

AU13 - Oral Anatomy (4 decks)

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