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Dental Anatomy > Primary dentition > Flashcards

Primary dentition Flashcards

1
Q

What is the main importance of primary dentition?

A

Same purpose as permanent dentition, as in mastication, but serves as TEMPORARY space holders for eruption of permanent teeth!

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2
Q

Is the size wider or smaller than permanent teeth?

A

Wider

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3
Q

Is crowding a problem in primary dentition?

A

Yes

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4
Q

What is the process of losing primary teeth called?

A

Exfoliation

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5
Q

When does exfoliation

A

7-12 years

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6
Q

Does exfoliation indicate a period at which root resorption of the deciduous tooth begins?

A

NO

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7
Q

How many years after the root is completely formed and the apical foramen is established that resorption begins at the apical extremity?

A

1 or 2 years

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8
Q

How many primary teeth do you have?

A

20 total, 10 each arch

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9
Q

How many incisors, canines and molars do you have in each jaw?

A

4 incisors, 2 canines, and 4 molars

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10
Q

List the primary teeth in terms of eruption times:

A

Central Incisor, Lateral Incisor, 1st Molar, Canine, Second Molar

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11
Q

When is primary dentition complete?

A

2.5

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12
Q

What replaces primary molars?

A

Permanent Premolars

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13
Q

Are premolars found in the primary dentition?

A

NO

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14
Q

The crowns of the primary maxillary first molars resemble the crowns of what?

A

Permanent Premolars

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15
Q

How many roots does the primary maxillary molars have?

A

Three

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16
Q

The deciduous mandibular first molar is unique in that it has a crown like what permanent tooth?

A

None

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17
Q

What system is used to indicate teeth of the primary dentition?

A

Using Universal Numbering System, teeth are identified as letters

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18
Q

True or False: The crowns of primary anterior teeth are wider mesiodistally in comparison with their crown length than are the permanent teeth

A

ture

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19
Q

True or False: The roots of the primary anterior teeth are broader and shorter comparatively to permanent dentitions

A

FALSE

Roots of primary anterior teeth are narrower and longer!

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20
Q

True or False: The roots of the primary molars accordingly are shorter and more broad and compact, than that of the permanent dentition.

A

FALSE

Roots of Primary Molars are LONGER and more SLENDER, and FLARE more, because it allows for room of the premolars to come in

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21
Q

True or False: The cervical ridges of enamel of the anterior teeth are more prominent in primary dentition

A

True

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22
Q

True or False: The crowns and roots of primary molars at their cervical portions are more broad mesiodistally

A

FALSE- they’re more slender at the cervix

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23
Q

True or False: The cervical ridges bucally on the primary molars are much more pronounced especially on the maxillary and mandibular first molars

A

True

24
Q

True or False: The buccal and lingual surfaces of the primary molars are flatter above the cervical curvatures than those of the permanent molars, which narrows the occlusal surface

A

TRUE

25
Q

True or False: Primary teeth are usually less pigmented and are whiter in appearance than permanent teeth

A

t

26
Q

True or False: The enamel cap of primary molars is thicker and has a less consistent depth

A

FALSE; the enamel cap of primary molars is thinner and has a more consistent depth

27
Q

Do primary molars have a greater thickness of dentin on the pulpal wall?

A

YES

28
Q

Do primary molars have pulpal horns that sit higher than permanent molars?

A

YES

29
Q

Does the primary central incisor contain mamelons?

A

NO

30
Q

Is the crown of the primary central incisor greater mesiodistally than cervicoincisally?

A

YES- opposite is true of permanent central incisors

31
Q

Does the primary lateral incisor have a smaller crown and more curved incisal edge?

A

YES

32
Q

What has a greater length of the primary lateral incisor crown, cervicoincisal or mesiodistal?

A

Cervicoincisal

33
Q

Does the primary canine resemble a central or lateral incisor more?

A

NEITHER- it has a specific function, thus doesn’t look like any other tooth

34
Q

How is the cusp on the maxillary primary canine in comparison to that of the maxillary permanent canine?e

A

LONGER AND SHARPER

35
Q

Does the maxillary primary canine have a cingulum?

A

YES

36
Q

Where does the root taper on the primary maxillary canine?

A

Tapers lingually and inclined distally

37
Q

What shape does the primary maxillary canine crown take from the incisal aspect?

A

DIAMOND

38
Q

Does the mandibular central incisor have mameolons, or developmental grooves?

A

NO

39
Q

Does the mandibular primary central incisor have a cingulum and marginal ridges?

A

YES

40
Q

Does the mandibular primary lateral incisor have a slight distal tilt?

A

YES

41
Q

What tooth is the mandibular primary lateral incisor more similar to?

A

Primary Central Incisor

42
Q

What does the maxillary first molar look like?

A

A maxillary first premolar but with an oblique ridge!

43
Q

Which tooth has larger measurements, the primary maxillary first molar or second molar?

A

Primary Maxillary Second Molar

44
Q

Does the primary maxillary 1st molar have a cervical ridge?

A

YES- which is more pronounced on primary than permanent

45
Q

What are the three teeth we have studied that contain an oblique ridge?

A

Permanent Maxillary 1st and 2nd molars, and primary maxillary 1st molar

46
Q

Which primary tooth resembles a permanent maxillary first molar the most?

A

Primary maxillary second molar, but its way smaller

47
Q

Does the primary maxillary second molar have a supplemental cusp too?

A

YES

48
Q

Which tooth does not resemble any other tooth deciduous or permanent?

A

Primary Mandibular 1st Molar

49
Q

On the occlusal surface of the primary mandibular first molar, which cusp is the largest and best developed of all the cusps, as it has a a broad, flattened surface lingually?

A

Mesiolingual Cusp

50
Q

What tooth does the primary mandibular second molar resemble?

A

Permanent mandibular 1st molar

51
Q

What tooth replaces the primary mandibular second molar?

A

Mandibular 2nd premolar

52
Q

How many cusps from the lingual aspect of the primary mandibular 2nd molar can you see?

A

3

53
Q

Which tooth has a lot of secondary anatomy?

A

Primary Mandibular 2nd Molar

54
Q

True or False: The oblique ridge consists of the distal ridge of the mesiolingual cusp and the triangular ridge of the distofacial cusp

A

TRUE

55
Q

What is an oblique ridge?

A

Transverse ridge that crosses the tooth obliquely

56
Q

What makes up the triangular ridge on the mesiolingual cusp?

A

Cusp, Mesial Ridge, Distal Ridge to form the triangular ridge of the mesiolingual cusp

Dental Anatomy (17 decks)

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