Dental Anatomy VI - Final Flashcards Preview

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Flashcards in Dental Anatomy VI - Final Deck (105):
1

Cusp or cuspal ridges descend from the tips of cusps in lateral directions, either _____ or _____ from the midline of the arch.

Toward
Away

2

Every posterior tooth cusp has ___ ridges that emanate from the tip, but only ___ is ______

4
One
Triangular

3

How many cuspal ridges emanate off each cusp in posterior teeth?

2

(there are 4 total, 1 triangular)

4

The Apical root sections are divided into the following 3 sections:

Cervical 1/3
Middle 1/3
Apical 1/3

5

What is the last primary tooth to begin calcification?
When does this occur?

Maxillary 2nd Molar

19 Weeks in Utero

(A and J)

6

What are the first primary teeth to begin calcification in utero?
When does this occur?

Maxillary/Mandibular central incisors

14 weeks

7

First evidence of calcification has occurred by ___ weeks in utero

20

8

At 9 Months of age, what teeth are visible?

Mandibular Central Incisor only tooth visible

9

What is the order of eruption for Maxillary Permanent Teeth?

1st Molar
CI
LI
1st Premolar
2nd Premolar
Canine
2nd Molar
3rd Molar

10

What Primary teeth remain at 8 years of age?

Canine
1st Molar
2nd Molar

11

T/F
3rd Molars have begun calcification at 8 y.o.

False

12

T/F
Permanent 2nd Molars have erupted at 8 y.o.

False

13

T/F
2nd Molars have erupted at 8 y.o.

False

14

What 4 teeth have not erupted at 11 y.o.
(list in order of eruption)

Mandibular 2nd Premolar
Maxillary Canine
2nd, 3rd Molars

15

Paleontological Terms for the following:
Mesiofacial cusp
*Distofacial cusp
Mesiolingual cusp
Distolingual cusp

Paraconus
*Metaconus
Protoconus
Hypoconus

16

Proximal Contact areas of the Maxillary Anterior Teeth:

IJJMJM

17

What periodontal fibers resist forceful impaction?

Oblique

18

What are the 5 clinical issues associated with ill-formed embrasures (line angles over/underdeveloped)?

*what wouldn't we see?

Malposition/misalignment
Oversized Proximal contacts
Lack Proximal contact
Fracture
Caries

*anything anatomically correct

19

T/F
Lingual surface of the Primary Mandibular Canine is LESS developed than Primary Maxillary Canines.

True

20

Describe the cusp tip of the Primary Mandibular Canine

Mesial to center

21

Is there a root surface depression in the Primary Mandibular Canine?

Negative

22

3 lingual features of the Primary Mb Canines

Lingual ridge
Mesiolingual fossa
Distolingual fossa

23

In what direction does the Primary Maxillary 1st Molar taper?

Distally

24

T/F
Mesial half of Primary Max 1st Molar and the mesial marginal ridge is larger/more prominent

True

25

Where is the triangular ridge of the Primary Max 1st Molar?

Mesial half

26

Along with a triangular ridge in the Mesial half of the Primary Max 1st Molar, what other ridge is prominent?

Oblique

27

What is the crown outline form of the Primary Mandibular 1st Molar?

Rhomboidal

28

Cusp sizes of Primary Mb 1st Molar from largest to smallest:

Mesiofacial
Mesiolingual
Distofacial
Distolingual

29

Name the Major fossae on the Primary Mb 1st Molar.

Central
Mesial Triangular
Distal Triangular

30

Crow convergence of the Primary Mb 1st Molar:

Lingual

31

What tooth doesn't resemble any other in the Primary or Permanent dentition?

Primary Mb 1st Molar

32

Primary Mb 2nd Molar:
Proximal contact areas located?

Middle 1/3

33

Primary Mb 2nd Molar:
How many cusps?
All be seen from what angle?

5
Facial

34

Primary Mb 2nd Molar:
Describe cervical line

Apical Dip in area of Bifurcation

35

Primary Mb 2nd Molar
Describe the roots
(how many? which longer?)

2 roots (mesial and distal)
Mesial Longer

36

What is the tooth anomaly in which fusion of the permanent dentition is uniform?

Gammate

37

Permanent Max C.I.
Which is the greater width?
Interproximal contact ____ faciolingually

Mesiodistal (8.5mm)
Faciolingual (7.0 mm)

Centered

38

Permanent Max C.I.
The incisal edge is _____ and ____ to the mesiodistal bisecting plane

Straight
90 degrees

39

Permanent Max C.I.
Incisal edge is _____ to Faciolingual bisecting plane

Parallel

40

Which line angle is more developed in the Permanent Max C.I.?

Mesiofacial

(as opposed to Distofacial)

41

Max L.I.
What shape is the crown?

Trapezoidal

42

Max L.I.
Which line angle more rounded?

Distal

(but both described as rounded)

43

Max L.I.
Describe the root apex

Distal curvature

44

Mb C.I.
Describe proximal contact area

Faciolingual Midpoint

45

Mb C.I.
Measurement of the crown facially is ____ greater than lingually

0.5 mm

46

T/F
The crests of the cervical ridges of the Mb C.I. are at the same level Facially and Lingually.

False

(higher lingually)

47

Mb C.I.
The wide and long root surface depressions are deeper on what side?

Distal root surface

48

The Apex of the root in the Mb C.I. will be ____ with the faciolingual long axis bisector

Even

49

Mb L.I.
Icisal Ridge is _____

Lingual

50

Mb L.I.
The crest of the facial cervical ridge relates how to the lingual cervical ridge?

Higher Incisally

51

Mb L.I.
Describe the Cervical Line from the mesial perspective

Curves Incisally at middle of tooth faciolingually

52

Mb L.I.
What is a distinctive characteristic of the mesial view?

Incisal ridge curvature at the distal end is more inclined lingually, making it visible

53

What do you need to know about the root of the Mb L.I.?

Broad depression for most of length

54

Max Canine
Cusp tip ____ with root tip and height of curvature of cervical line (distal view)

Aligned

55

Max Canine
Where is the Pronounced Concavity?

Cervical to Distal contact area

*not really on/minimially on mesial surface

56

Mb Canine
Which outline is straight and continuous?

Mesial

57

Mb Canine
Cusp tip location:
Cervical line decription:

Mesial

Semicircular, dips apically

58

Max 1st Premolar
Lingual cusp less/more pointed than facial?

*How much shorter?

Less pointed

*1.0 mm shorter

59

Describe the Lingual cusp of the Max 1st Premolar

How relate to cuspal ridge length

Slightly mesial

*so Mesial cuspal Ridge Shorter

60

Max 1st Premolar
What meets at the Mesial Marginal Ridge?
What direction do they travel?

Facial and Lingual cuspal ridges

Cervically

61

Max 1st Premolar
The crest of the Mesial Marginal Ridge is ______ to the faciolingual long axis bisector

Perpendicular

62

Max 1st Premolar
Facial cusp tip is ____ to the mesiodistal bisector and ____ the distance from the _____ outline of the faciolingual bisector of the crown

Distal

One third

Facial

63

Max 1st Premolar
Describe the lingual cusp tip

Mesial

Nearer lingual outline than Facial cusp to facial outline

64

Max 2nd Premolar
Which tip is more pointed?
Location of more pointed tip?

Facial cusp

Halfway btwn faciolingual long axis bisector and greatest facial curvature

65

Max 2nd Premolar
Which cusp more rounded?
Location of cusp?

Lingual

Closer to lingual side
(closer to vertical line marking the greatest lingual curvature than it is to the faciolingual long axis bisector)

66

What tooth has an Oval crown outline in a rectangular occlusal table and a "balanced" or symmetrical look from the occlusal aspect?

Max 2nd Premolar

67

Mb 1st Premolar
Describe lingual cusp tip (2 things)

Pointed
Centered

68

Mb 1st Premolar
Distinct and consistent ______ groove is present on all specimens

Where are the consistent horizontal depressions located?

Mesiolingual

Mesiolingual/Distolingual

69

Mb 1st Molar
Describe the triangular ridge of the facial cusp
Describe the triangular ridge of the lingual cusp

Very long

Very short

70

T/F
The triangular ridges of the Mb 1st Molar form one Transverse Ridge

True

71

Describe the occlusal aspect of the Mb 2nd Premolar

Nearly square
Little Lingual convergence

72

Large to small, name the cusps of the Mb 2nd Premolar:

Facial
Mesiolingual
Distolingual

73

From the Mesial view, how does the Mb 1st Premolar compare to the Mb 2nd Premolar?

Mesial Marginal Ridge inclined
Mesiolingual groove present
Mesiolingual cervical depression (on crown)
Surface Depression (on root)

*same # Roots

74

Max 1M
Mesiolingual cusp takes up _____ total mesiodistal measurement and the distolingual cusp takes up ____.

60%
40%

75

Max 1M
Why is the distal half narrower?
What surface can be seen because of this?

Facial cervical ridge flattens distally

Facial

76

Max 1M
Cusp sizes larges to smallest

Mesiolingual
Mesiofacial
Distolingual
Distofacial
5th

77

Max 2M
Obtuse line angles
Acute line angles

Mesiolingual and Distofacial (obtuse)

Distolingual and Mesiofacial (acute)

78

Max 2M
What is the most facially and mesially placed cusp?

Mesiofacial

79

Max 2M
What is the most lingually and distally placed cusp?

Distolingual

80

Max 2M
Triangular Ridge of the Distofacial cusp and the Distal Cuspal Ridge of the mesiolingual cusp meet _____ to the _____ than on the Max1M

Closer

Central Pit

81

Max 3M
Cusps largest to smallest

Mesiofacial
Mesiolingual
Distofacial
Distolingual

82

Mb 1M
There are 2 Facial Grooves, which one is shorter?
Where does the shorter one terminate?
What is at the terminus?
Containing?

Mesiofacial

Halfway to cervical line

Slight depression (lateral)

Facial (buccal) Pit

83

Mb 1M
Distofacial groove extends onto _____ area on the ____ of the surface _____ to the cervical ridge. It ____ ends in a pit but may be fissured.

Flattened
Middle one third
Distal
Rarely

84

Mb 1M
The angulation of the triangular ridge of the ____ cusp is ____ to the marginal ridge

Mesiofacial

Almost Parallel

85

Mb 1M
Triangualr ridge of the mesiolingual cusp is _____ degrees in relation to the mesial marginal ridge

30 degrees

86

Mb 1M
What exclusively makes up the distal contact area?
Relation to the faciolingual vertical bisector of the crown.

Distal Cusp

Slightly facial to

87

Mb 1M
The distofacial cusp is _____ to the distal cusp tip
(distal aspect)

Facial

88

Mb 1M - Occlusal aspect
How many developmental grooves?
What are they?

4

Central
Mesiofacial
Distofacial
Lingual

89

Mb 1M - Occlusal
Describe how the Central Groove runs across the tooth

Mesiodistally
Irregular

90

Mb 1M - Occlusal
Distofacial groove extends _____ at the ____ part of the sulcus

Distofacially

Deepest

91

Mb 1M - Occlusal
The lingual groove starts at the central pit and travels ______ over to the lingual surface

Minimally

92

Mb 2M - Occlusal
Shape of crown outline:
Converging:
Shape of occlusal table:

truncated Rectangle
Distally
Rectangle

93

Mb 2M - Occlusal
How many major grooves?
What do they form?

3 major grooves

+

94

Mb 2M - Occlusal
Where is the central pit located?

Lingual half of crown

95

Mb 3M - Occlusal (4 cusp variety)
How many pits?
What are they?

4

Central pit
Facial Pit
Mesial Triangular Pit
Distal Triangular Pit

*No lingual Pit

96

Max 1 PM - Mesial
What is present on all tooth forms?
Describe.

Relatively deep root depression

Increases width occlusally from bifurcation to cervical line

97

Max 1M - Mesial
Mesial root surface has what 2 concavities?

Trifurcation area

Wide and Shallow on Mesiofacial Root

98

T/F
Max 1M
The mesiofacial root surface depression extends occlusally across the cervical line onto the cervical one-third of the crown

False

99

Mb 1M
Root trunk measurement on the Facial Aspect

3.0 mm

100

Max 1PM
How often are there 2 Canals?
3 Canals?
1 Root?
2 Roots?
3 Roots?

83%
2%

23%
75%
2%

101

Max 1M
Mesiofacial Root, % of 2 or more canals?

59.2%

102

Max 1M
Distofacial Root, % of 2 or more canals?

1.7%

103

Max 1M
Lingual Root, % of 1 canal?

99%

104

Max 1M
How often does it have 3 roots?
How often do roots fuse?

95.9%

5.2%

105

Mb 1M
Mesial Root, % time 2 or more canals?

95.7%

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