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Flashcards in Deciduous Molars Deck (50):
1

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

at the contact areas

2

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

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

3

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

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

4

T or F:
in the primary maxillary first molar, the buccal surface has deep buccal grooves

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

5

T or F:
the primary maxillary first molar is larger than the second molar in all dimensions

false
it is smaller than the second molar in all dimensions

6

T or F:
the primary maxillary first molar's size and shape makes it appear to be a combination of molar and premolar

true

7

T or F:
the primary maxillary first molar has blunt roots with a narrow spread

false
roots are slender, long, with a wide spread

8

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

shorter

9

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

almost at the cervical line, showing very little root trunk

10

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

lingually

11

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

mesiolingual cusp; distolingual cusp is poorly defined

12

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

the lingual view

13

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

true

14

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

false
the mesiolingual cusp is longer and sharper than the mesiobuccal cusp

15

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

true

16

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

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

17

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

distobuccal root

18

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

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

19

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

distally, and it tapers a lot to the distal

20

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

no

21

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

maxillary first premolar

22

T or F:
from the occlusal view, the primary maxillary first molar's crown converges distally to lingually

false
it converges lingually to distally

23

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

true

24

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

sulcus

25

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

true

26

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

true

27

T or F:
from the buccal view, the primary maxillary second molar resembles a permanent first molar

true
but it is smaller

28

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

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

29

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

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

30

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.

true

31

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

developmental groove

32

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

all three roots; lingual root is largest and thickest

33

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

due to its thickness buccolingually

34

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

true

35

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?

about 2/3

36

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

true

37

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

true

38

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

less

39

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

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

40

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

permanent first molar

41

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

rhomboidal

42

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

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

43

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

true

44

T or F:
in the occlusal view of the primary maxillary second molar, the central fossa has a central pit

true

45

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

the mesial marginal ridge

46

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

yes

47

T or F:
from the occlusal view of the primary maxillary second molar, the oblique ridge is flat

false
it is prominent

48

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

the distal marginal ridge

49

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

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

50

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

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