Dental Anatomy Facts Part 2 Flashcards Preview

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Flashcards in Dental Anatomy Facts Part 2 Deck (108):
1

Most pronounced developmental marginal groove of any max tooth

Max 1st premolar, mesial marginal ridge

2

Mesial side of max 1st premolar

mesial concavity that makes it difficult to adapt a matrix band
mesial marginal developmental groove

3

The cervical cross section of max 1st premolar has what shape

Kidney shape - because of mesial concavity

4

Cervical cross section of max first premolar pulp chamber floor has what shape

kidney shape

5

Which non-molar tooth most frequently exhibits three roots

Max first premolar

6

The facial cusp of the max first premolar is offset to what side

offset to the distal

7

Which facial cusp ridge is longer on max first premolar

Longer mesio-facial cusp ridge (cusp tip offset to distal)
-only premolar with longer mesial cusp ridge (along with primary maxillary canine)

8

Which premolar has the steepest cusp inclines among premolars

Max first premolar

9

Maxillary premolars lingual cusps are off set to what side

Mesial
(buccal cusps is to distal)

10

Which tooth has greatest cervico-occlusal crown height among posterior teeth

Max first premolar

11

Which non-molar tooth has the sharpest demarcation between pulp chamber and canal

Max first premolar

12

Relation of cusp sizes on max first premolar to max 2nd premolar

Size and position of cusps of 2nd max premolar are more identical than max 1st

13

What is the most symmetrical posterior tooth

Max 2nd premolar

14

Which tooth has a short central groove and lots of supplemental grooves giving it a wrinkly look

Max 2nd premolar

15

Which tooth has fossa closest in size compared to any other posterior tooth

Max 2nd premolar

16

Which tooth uniquely has a prominent triangular ridge

Mand first premolar
-may not have central groove

17

Which tooth frequently has both a separate mesial and distal pit

Mand first premolar
snake eyes - prominent triangular ridge

18

Mesial side of #21

mesiolingual developmental groove - originates from the mesial occlusal pit

19

How far does mesiolingual developmental groove extend on #21

Onto proximal surface

20

Only tooth with a mesio-lingual groove

Mand first premolar

21

Angle of the mesial marginal ridge of mand 1st premolar

runs at a 45 degree angle because of mesial marginal ridge

22

Relation between position of mesial and distal marginal ridges of mand first premolar

mesial marginal ridge is located more cervical than the distal

23

From which view can more of the occlusal surface be seen on a mand first premolar

from the mesial
lower marginal ridge - 45 degree angle

24

Occlusal outline/shape of mand first premolar

diamond shape

25

In the rare event of a second canal for a mand 1st premolar, it is most likely located where

to the lingual

26

Which premolar frequently only has one pulp horn

Mand first premolar

27

Size relation between cusps of mand first premolar

lingual cusp is about 2/3s the height of facial

28

Lingual cusp of mand first premolar is similar in development to what

cingulum of canine

29

Occlusion of lingual cusp of mandibular first premolar in normal occlusion

does not occlude

30

Which tooth has most variation of facial vs lingual cusp height among all posterior teeth

Mandibular first premolar

31

Where is masticatory mucosa (attached gingiva) narrowest

facial aspect of man premolars

32

Smallest facio-lingual dimension of all posterior teeth

mand first premolar

33

Which tooth is closest of all mandibular teeth in facio-lingual vs mesio-distal diameter

Mand first premolar

34

Outline shape from occlusal view of crown of mand second premolar
- shape of occlusal table

crown is pentagonal
= occlusal table is rectangular

35

The premolar most likely to have a crescent-shaped central developmental groove

Mand 2nd premolar

36

Shortest interdental papilla located where

between mand second premolar and first molar

37

Cusp locations of the Y type mand premolar

one facial and two lingual cusps

38

Y type mand second premolar has same number of occlusal pits as what tooth

Max first molar - 3 pits

39

Only premolar with multiple lingual cusps

Mand second premolar - Y type

40

Only premolar with a lingual groove

Mand second premolar - Y type

41

Only premolar with a central fossa

Mand second premolar - Y type?

42

The premolar most frequently with s single central pit

Mandibular second premolar

43

Most congenitally missing premolar

Mand second premolar

44

Occlusal outline form/shape of max first molar

rhomboidal

45

Which line angles of an occlusal view of max first molar are acute angles

Mesio facial and distolingual line angles

46

Mesio-lingual and disto-facial line angles of max first molar from occlusal view

obtuse angles (of the rhomboidal shape)

47

Which line angles of max first molar make up oblique ridge

the obtuse ones
Mesio-lingual and disto-facial line angles

48

The maxillary first molar tends to taper towards which direction

taper towards the facial rather than lingual

49

Which embrasure of the mx first molar is larger than the other - buccal or lingual

buccal is larger because max first molar tapers more to towards the buccal

50

Most prone (flat/level) surfaces of molars

lingual surfaces of maxillary molars and facial surfaces of mandibular molars

51

Largest root of max first molar

Palatal

52

Smallest root of max first molar

distobuccal root
(mesiobuccal root needs room for the 2nd canal (MB2), so it will be bigger)

53

From facial view, the apex of the lingual root of max first molar is in line with what

facial groove

54

From lingual view of max first molar, the apex of the palatal root is in line with what

midpoint between mesial and distal

55

Where is a 4th canal (when present) located on max first molar

mesiobuccal canal

56

Of the three furcations of max first molar, which is closest to the cervical line

Mesial furcation

57

Which furcation on max first molar is furthest from the cervical line

distal furcation
You get further away the more distal you go

58

Which molar has the oblique ridge

max first and second molar

59

Oblique ridge of max first molar forms what boundary of the central fossa

distal boundary

60

Which corners of max first molar coincide with direction of the oblique ridge

the obtuse corners
mesiolingual and distobuccal

61

Compare heights of the centers of oblique ridge and marginal ridge of max first molar

All are at the same level

62

The mesiolingual cusp of max molars occludes where

in central fossa of mand molars

63

Which tooth has greatest faciolingual diameter of crown of all teeth

Max first molar - think cusp of carabelli

64

Tooth with closest in size of faciolingual vs mesiodistal lengths of any Max Posterior tooth

Max first molar

65

Compare mesiodistal widths on buccal and lingual sides of max first molar

mesiodistal length is longer toward the facial than toward the lingual

66

Which max first molar cusp is not part of the the cusp triangle

distolingual cusp

67

Which max first molar cusp is largest and longest

mesiolingual cusp

68

Which tooth is mostly likely forced into the maxillary sinus during extraction

Max first molar

69

Distal surface of Max first molar

Has distal concavity, causes difficulty with matrix placement

70

Compare lengths of distal lingual grooves of max first vs second molars

Maxillary first molar has shorter distolingual groove than second molar

71

Which cusp of the max second molar is not part of the molar cusp triangle

distolingual cusp

72

If distolingual cusp is not present on max 2nd molar, describe tooth

3 cusp type heart shape

73

Nature of max second molar roots

less divergent
-greater distal inclinations

74

Cross sectional outline at cervical of 2nd max molar is what shape

roughly triangular

75

The groove pattern for mand first molar

Considered a Y or Dryopethicus pattern

76

The occlusal outline of mand first molar

Pentagon

77

Smallest cusp of mand first molar is

distal cusp

78

Largest cusp of mand first molar

Mesio-facial
(mesio-facial, mesiolingual, distolingual, distobuccal, distal)

79

Largest M-D crown dimension of any other tooth

Mand first molar - think 3 buccal cusps

80

Only Mandibular teeth that are wider mesio-distally than facio-lingually

Mand molars

81

Only posterior teeth that are wider M-D than F-L

Mand molars

82

Greatest M-D diameter of all molars

Mand first molar

83

Largest F-L dimension of any mandibular tooth

Mand first molar

Max first molar has greatest F-L dimension of ALL teeth (think cusp of carabelli)

84

Largest occluso-cervical dimension of any mandibular molar

Mand first molar

85

Facial surface of mandibular molars in relation to border of ascending ramus

they are medial to border of ascending ramus

86

Number of developmental grooves on mand first molar compared to mand second molar

two buccal grooves on first mand molar
-only one buccal groove on second

87

How many facial cusps on mand first molar

three facial cusps

88

Name of the developmental groove between the DF cusp and the D cusp of mand first molar

Distofacial groove
not distal groove

89

Mandibular first molar usually has how many roots and canals

two roots and three canals

90

Mandibular first molar canals are located where

two mesial canals, one distal

91

Which tooth has the longest root of any other molar

Mand first molar

92

Which tooth has greatest root separation of any other tooth

mand first molar
only two roots, less going on, more space, less distally and less crowded

93

Mid root cross section of mand first molar, where is it larger

mesial is larger - need room for two mesial canals

94

Which root has greatest F-L dimension of any other root

Mand first molar mesial root - need room for two mesial canals

95

Cusp occlusion of mand molars with max molars

the distobuccal cusp of mand molars occludes in central fossa of max molars

96

What accommodates working movements on mand first molars

the ideal position and height of lingual cusps

97

The groove pattern for the mand second molar is what shape

a cross pattern or a + shape
cruciform occlusal pattern

98

How to tell the difference between a right and left mand second molar

the mesial third has a greater F-L diameter

99

The only posterior teeth that are wider M-D than F-L

Mand molars

100

Only Mand teeth that are wider M-D than F-L

Mand molars

101

Alignment of mand second molar crown

Inclines to the mesial and lingual - think of the larger mesial cusps weighing it down

This places the apex of the crown more facial, and the crowns more lingual

102

Mand molars and border of the ascending ramus

Facial surfaces of mandibular molars located medial to the border of the ascending ramus

103

Occlusion of Max 3rd molar

has a single antagonist
along with mand centrals

104

What molar most frequently has only 3 cusps

Max third molar

105

Max 3rd molars are frequently what shape from an occlusal view, why

heart shaped, b/c they are missing the DL cusp

106

Which tooth has most variation in crown morphology

3rd molars - maybe mand third

107

Greatest distal root inclination of any other tooth

Mand 3rd molar

108

Shortest root of any mand tooth

Mand 3rd molar