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Dental Anatomy > Deciduous Molars > Flashcards

Deciduous Molars Flashcards

1
Q

In the primary maxillary first molar, where is the widest measurement?

A

at the contact areas

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2
Q

T or F:

in the primary maxillary first molar, the measurement at the cervix is about 2 mm less than opposing teeth

A

true

this makes the tooth look narrower at the cervix than the permanent

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3
Q

T or F:

in the primary maxillary first molar, the occlusal line is scalloped with a definite cusp form

A

false

while it is scalloped, it does NOT have a definite cusp form

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4
Q

T or F:

in the primary maxillary first molar, the buccal surface has deep buccal grooves

A

false

the buccal surface is smooth, with very little evidence of buccal groove

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5
Q

T or F:

the primary maxillary first molar is larger than the second molar in all dimensions

A

false

it is smaller than the second molar in all dimensions

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6
Q

T or F:

the primary maxillary first molar’s size and shape makes it appear to be a combination of molar and premolar

A

true

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7
Q

T or F:

the primary maxillary first molar has blunt roots with a narrow spread

A

false

roots are slender, long, with a wide spread

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8
Q

in the primary maxillary first molar, is the distal root longer or shorter than the mesial root?

A

shorter

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9
Q

in the primary maxillary first molar, where does the bifurcation of the roots start?

A

almost at the cervical line, showing very little root trunk

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10
Q

in the lingual view of the primary maxillary first molar, where does the crown converge?

A

lingually

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11
Q

in the primary maxillary first molar, what is the most prominent cusp?

A

mesiolingual cusp; distolingual cusp is poorly defined

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12
Q

in what view can all three roots be seen in the primary maxillary first molar?

A

the lingual view

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13
Q

T or F:

from the mesial view, the primary maxillary first molar is wider at the cervical third than at the occlusal third

A

true

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14
Q

T or F:
from the mesial view, the mesiobuccal cusp of the primary maxillary first molar is longer and sharper than the mesiolingual cusp

A

false

the mesiolingual cusp is longer and sharper than the mesiobuccal cusp

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15
Q

T or F:

from the mesial view of the primary maxillary first molar, the cervical line will curve a little to the occlusal

A

true

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16
Q

what is a major identifier of the primary maxillary first molar from the mesial view?

A

there is a large convexity on the buccal surface at the cervical third

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17
Q

from the mesial view of the primary maxillary first molar, which root is hidden behind the mesiobuccal root?

A

distobuccal root

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18
Q

describe characteristics of the lingual root in the primary maxillary first molar

A

it is long, slender, and curves sharply in the buccal direction at the middle 1/3

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19
Q

from the distal view, is the crown of the primary maxillary first molar more narrow distally or mesially?

A

distally, and it tapers a lot to the distal

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20
Q

in the primary maxillary first molar, is the prominent bulge seen in the distal view?

A

no

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21
Q

from the occlusal view, which permanent tooth does the primary maxillary first molar most resemble?

A

maxillary first premolar

22
Q

T or F:

from the occlusal view, the primary maxillary first molar’s crown converges distally to lingually

A

false

it converges lingually to distally

23
Q

T or F:
from the occlusal view, the primary maxillary first molar will have a central fossa with a mesial triangular fossa, small mesial pit

A

true

24
Q

in the primary maxillary first molar, what feature connects the central fossa to the mesial triangular fossa?

A

sulcus

25
Q

T or F:
from the occlusal view, in primary maxillary first molars, there may be an oblique ridge going from the mesiolingual to the distobuccal

A

true

26
Q

T or F:
from the occlusal view, the primary maxillary first molar may have a distal developmental groove outlining a distolingual cusp

A

true

27
Q

T or F:

from the buccal view, the primary maxillary second molar resembles a permanent first molar

A

true

but it is smaller

28
Q

T or F:

in the primary maxillary second molar, the two buccal cusps vary in size and are less developed than in the first molar

A

false

they are close to the same size and are more developed than the first molar

29
Q

from the lingual view of the primary maxillary second molar, how many cusps are seen and what are their names?

A

3 cusps

1) mesiolingual cusp (large and well developed)
2) distolingual cusp (well developed)
3) supplemental cusp aka tubercle of carabelli

30
Q

T or F:
in the lingual view of the primary maxillary second molar, the suppelemental cusp (tubercle of carabelli) may be missing. In this case there may only be a dimple.

A

true

31
Q

in the lingual view of the primary maxillary second molar, what is present between the two lingual cusps?

A

developmental groove

32
Q

how many roots can be seen from the lingual view of the primary maxillary second molar?

A

all three roots; lingual root is largest and thickest

33
Q

from the mesial view, the primary maxillary second molar’s crown looks short. Why?

A

due to its thickness buccolingually

34
Q

T or F:
in the mesial view, the primary maxillary second molar’s cervical line has little curvature and is mostly straight across

A

true

35
Q

In the mesial view of the primary maxillary second molar, the mesiobuccal root is broad and flat. What width of the root trunk is it?

A

about 2/3

36
Q

T or F:
in the mesial view of the primary maxillary second molar, the lingual root has about the same curvature as that of the first primary molar

A

true

37
Q

T or F:

in the mesial view of the primary maxillary second molar, the mesiolingual cusp is just below the bifurcation

A

true

38
Q

in the primary maxillary second molar, is the distal measurement more or less than the mesial measurement?

A

less

39
Q

from the distal view of the primary maxillary second molar, is the point of bifurcation of the roots more apical or cervical?

A

more apical; it is also more centered above the crown compared to the mesial

40
Q

from the occlusal view, what permanent tooth does the primary maxillary second molar resemble?

A

permanent first molar

41
Q

what shape is the primary maxillary second molar from the occlusal aspect?

A

rhomboidal

42
Q

name the 5 cusps of the primary maxillary second molar seen from the occlusal aspect

A

mesiobuccal, distobuccal, mesiolingual, distolingual, and the tubercle of carabelli

43
Q

T or F:
in the occlusal view of the primary maxillary second molar, the buccal surface is quite flat, with a developmental groove between cusps

A

true

44
Q

T or F:

in the occlusal view of the primary maxillary second molar, the central fossa has a central pit

A

true

45
Q

in the occlusal view of the primary maxillary second molar, the mesial triangular fossa is just distal to which marginal ridge?

A

the mesial marginal ridge

46
Q

is a central groove and buccal developmental groove seen from the occlusal aspect of the primary maxillary second molar?

A

yes

47
Q

T or F:

from the occlusal view of the primary maxillary second molar, the oblique ridge is flat

A

false

it is prominent

48
Q

in the occlusal view of the primary maxillary second molar, the distal triangular fossa is just mesial to which marginal ridge?

A

the distal marginal ridge

49
Q

in the occlusal view of the primary maxillary second molar, what does the distal groove go between?

A

it goes between the two lingual cusps, and then it becomes the lingual developmental groove

50
Q

T or F:

from the occlusal view of the primary maxillary second molar, the distal marginal ridge is not well developed

A

false

it is well developed, unlike that of the first primary molar

Dental Anatomy (11 decks)

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