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Flashcards in Dental Anatomy II Deck (105):
1

How many lobes of calcification do the Primary Maxillary Incisors arise from?

1

2

What features do Primary Maxillary Incisors lack?

Mamelons
Developmental depressions

3

Name 2 ways the Primary Maxillary Central Incisor differs from Lateral (aside from root differences).

Larger
More angular

4

Name 2 ways the Primary Maxillary Central Incisor differs from the Lateral in the root?

No curvature
Blunt Apex

(Lateral Apex - pointed)

5

T/F
Mesiodistal length > Cervicoincisal length in Primary Mandibular Incisors

False

6

Describe the incisal ridge for Primary Mandibular Incisors

Straight

7

In what teeth are the normal Proximoincisal angles reversed?

Primary Mandibular Incisors

8

T/F
Proximal contacts taper evenly in Primary Mandibular Incisors

True

*very symmetrical from Facial View

9

How much larger is the root than crown in Primary Mandibular Incisors?

2x

10

From what angle are all 3 roots visible for the Primary Maxillary 1st Molar?

Distal

11

In the Primary Maxillary 1st Molar, which is the shortest root?
Smallest (shortest) Cusp?

Distofacial

Distolingual

12

In the Primary Maxillary 1st Molar, everything
(cervical convexity, distal marginal ridge, distal marginal ridge groove)
is small, Except?

Root Trunk

*distance from CEJ to furcation

13

T/F
From the Distal view, the cervical line is straight in the Primary Maxillary First Molar.

False

*curves up Facially

14

Starting with the largest, name the 5 cusps of the Primary Maxillary 2nd Molar.

Mesiolingual
Mesiofacial
Distofacial
Distolingual
Carabelli (5th)

15

The distal convergence in the Primary Maxillary Second Molar suggests what shape?

Rhomboidal

16

What are 2 very prominent topographical features of the Primary Maxillary Second Molar?

Marginal Ridges
Oblique Ridge

17

Compared to the Oblique Ridge, where is the Transverse Ridge located in the Primary Maxillary 2nd Molar?

Mesially

18

What are the major and minor fossae of the Primary Maxillary 2nd Molar?

Major: Central and Distal

Minor: Mesial Triangular and Distal Triangular

19

Another name for the Distal Oblique Groove in the Primary Maxillary 2nd Molar.

Lingual Developmental Groove

20

What crosses the Oblique Ridge in the Primary Maxillary 2nd Molar?
What 2 features does it connect?

Transverse Groove

Central and Distal pits

21

How many Cusps and Roots are visible from the distal view of the Primary Mandibular 1st Molar?

4 cusps
2 roots

*all

22

How is the Distofacial Cusp positioned in relation to the Mesiofacial Cusp in the Primary Mandibular First Molar?

Lingually

23

T/F
The Primary Mandibular 1st Molar has a straight cervical line

False

*curved

24

T/F
The Distal Root converges to the apex in the Primary Mandibular 1st Molar

True

25

Where is the Developmental Root Surface Depression in the Primary Mandibular 1st Molar?

Distal

26

What tooth appears to be 2 different teeth fused?

Primary Mandibular 1st Molar

27

The mesial surface outline of the crown (from the facial view) of the Primary Mandibular 1st Molar looks like what?

Flat

28

Where are the Proximal contact points for the Primary Mandibular 1st Molar?

Middle 1/3, Occlusal portion

29

Describe the Facial Developmental Groove in the Primary mandibular 1st Molar?

Short

30

Where does the Cervical Line dip from the facial view of the Primary Mandibular 1st Molar?

Mesial half

31

Describe the Cervical Ridge of the Primary Mandibular 1st Molar.

Convex mesially, then fades

32

In what tooth is the Mesial Root longer and straighter than the distal?

Primary Mandibular 1st Molar

33

How much bigger is the crown and root in the Primary Mandibular 1st Molar?

20% taller crown
1/3 longer root

34

What tooth has a rectangular crown outline?

Primary Mandibular 2nd Molar

35

What tooth resembles the Permanent Mandibular 1st Molar?

Primary Mandibular 2nd Molar

36

2 convergences of the Primary Mandibular Second Molar:

Lingual
Distal

37

What cusps of the Primary Mandibular Second Molar are nearly equal in size?

3 facial
2 lingual

38

The Primary Mandibular 2nd Molar has a long and windy...

Central Developmental Groove

39

Describe the marginal ridge grooves in the Primary Mandibular 2nd Molar:

Distinct mesially

Notch distally

40

What separates the 3 facial cusps and 2 lingual cusps of the Primary Mandibular 2nd Molar?

Mesiofacial/Distofacial grooves

Lingual groove

41

What are the 3 major fossae of the Primary Mandibular 2nd Molar?

Central
Mesia triangular
Distal triangular

42

Why are there no Transverse Ridges in the Primary Mandibular 2nd Molar?

No triangular ridges (of which there are many) meet

43

Name 2 Root Anomalies

Pyramidism
(roots fused)

Taurodontism
(pulp chamber enlarged, bull horns)

44

What root anomaly only occurs in permanent teeth?

Taurodontism

45

T/F
Floor of the pulp is lower in both Taurodontism and Pyramidism

True

46

What makes up an Enamel Pearl?

Enamel nodule
Dentin core

47

Where are enamel pearls usually found?

Molars
(anything with multiple roots)

48

How do enamel pearls appear radiographically?

Radiopaque

(and small, round)

49

In what 2 locations are enamel pearls mostly found?

Distal of 3rd molars
Facial root furcation molars

50

What are extensions of the crown onto the root surface between roots called?

Enamel projections

51

In what teeth is Dens-in-Dente found?
(2 things)

Permanent
Maxillary Lateral Incisors

52

Enamel invagination occurs in what condition?

Dens-in-Dente

53

An infolding of dental papilla during development can lead to...

Dens-in-Dente

54

What feature is found on newly erupted Maxillary incisors?

Mamelons

55

Where are the marginal ridges found in Maxillary Incisors?

Mesial and Distal borders of Lingual surfaces

56

Maxillary Central Incisor
Mesodistal Width:
Faciolingual Diameter:

8.5 mm

7.0 mm

57

Where is the interproximal contact for Maxillary Central Incisors?

Centered facio-lingually
Incisal 1/3

58

The mesiodistal bisecting plane is _____ to the incisal edge
(Maxillary central Incisor)

perpendicular

59

The faciolingual bisecting plane is _____ to the incisal edge
(Maxillary central incisor)

parallel

60

T/F
The marginal ridges and cingulum are more prominent in lateral incisors

True

61

Compare the lingual fossa in the Central and Lateral Maxillary insisors

Central: trapezoidal, moderately deep

Lateral: triangular, deep

62

The outline of the Central Incisor is ____ from the incisal view
The outline of the Lateral Incisor is _____ from the incisal view

Triangular

Ovoid

63

T/F
The Central Incisor is larger and more angular than the Lateral.
(maxillary)

True

64

In what direction is the lateral incisor root pointed?

Distal

65

What exhibits more variation, central or lateral incisor?

Lateral

*one of most variable permanent teeth

66

What are 3 similarities of the Central and Lateral Incisors?

Cingulum offset distally
Centered faciolingual contact (incisal view)
Incisal edge centered over CEJ and Roots

67

What incisor has a lingual pit?

Lateral Maxillary

68

Where is the incisal ridge of the Mandibular Central?

slightly lingual

69

What shape is the lingual fossa of the Mandibular Central Incisors?

Trapezoidal

70

What is the narrowest tooth mesiodistally?

Mandibular Central incisors

71

Incisal line angles of Mandibular central incisors are much more squared than Maxillary

True

72

What tooth crown is considered bilaterally symmetrical?

Mandibular Central Incisors

73

Where are the mesial and distal proximal contacts of the Mandibular Incisors?

High Incisal third

74

Mandibular Central Incisor Root is _____ faciolingually and _____ mesiodistally

wider
narrow

75

What is found on both mesial and distal root surfaces of the Mandibular central incisors?

Developmental depressions

*tendency for 2 canals

76

T/F
Mandibular central incisor sometimes has 2 roots

True

77

What Mandibular Incisor is smaller?

Central

78

What Mandibular Incisor is more angular?

Central

79

What Mandibular Incisor more often has 2 Pulp canals?

Lateral

80

T/F
The crest of the cingulum is centered in both Mandibular Incisors

False

*offset Distally

81

Describe the lingual surface anatomy of the Mandibular Incisors

Inconspicuous

82

What Mandibular incisor has less embrasure?

Central

83

T/F
Both Mandibular incisors have a lingually positioned incisal edge

True

84

What teeth is the longest?

Canines
(both Maxillary and Mandibular)

85

What tooth has the longest root?

Maxillary Canine

86

T/F
Canines are anterior teeth

True

*biggest faciolingual dimensions

87

What edge of a Maxillary canine appears "pinched?"

Distal

88

T/F
Canine cusp tip is often lingual to the faciolingual bisector

False

*never
**most often centered

89

The Maxillary canine has the greatest cervical ridge prominence and greatest facial ridge prominence of any permanent anterior tooth

True

90

How is the distal contact area positioned faciolingually and cervicoincisally in the Maxillary Canine?

Centered

91

Where is the curvature of the cervical line of a Maxillary Canine more consistent?

Facial

92

What tooth has the largest cingulum of the Anterior?

Maxillary canine

93

T/F
The cingulum of the Maxillary Canine is centered

False

slightly distal

94

Describe the lingual ridge in the Maxillary Canine

thick and short

95

What marginal ridge is larger in the Maxillary Canine?

Mesial

96

Describe the mesial crown and root of the Mandibular Canine

Straight

97

Where is the cusp tip of the Mandibular Canine located?

Slightly mesial

98

What cuspal ridge is longer in the Permanent Mandibular Canine?

Distal

99

What two teeth have a semicircular cervical curvature?

Mandibular Canine

Maxillary Central Incisor

100

What has the longest root length of any Mandibular tooth?

Mandibular Canine

101

What tooth has the greatest cervicoincisal crown length?

Mandibular Canine

102

How is the facial outline shaped from a proximal view
(Mandibular Canine)

C - shaped

103

Where is the cusp tip in the Mandibular Canine in relation to the faciolingual bisector?

Lingual

*all mandibular anterior the same

104

What are the 2 fossae of the Mandibular Canine?

Mesiolingual
Distolingual

105

T/F
Mandibular canine anatomy is less developed than Maxillary canines

True

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