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Tim's Cards > Dental Anatomy VI - Final > Flashcards

Dental Anatomy VI - Final Flashcards

1
Q

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

A

Toward

Away

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2
Q

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

A

4
One
Triangular

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3
Q

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

A

2

there are 4 total, 1 triangular

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4
Q

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

A

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

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5
Q

What is the last primary tooth to begin calcification?

When does this occur?

A

Maxillary 2nd Molar

19 Weeks in Utero

(A and J)

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6
Q

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

A

Maxillary/Mandibular central incisors

14 weeks

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7
Q

First evidence of calcification has occurred by ___ weeks in utero

A

20

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8
Q

At 9 Months of age, what teeth are visible?

A

Mandibular Central Incisor only tooth visible

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9
Q

What is the order of eruption for Maxillary Permanent Teeth?

A 
1st Molar
CI
LI
1st Premolar
2nd Premolar
Canine
2nd Molar
3rd Molar
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10
Q

What Primary teeth remain at 8 years of age?

A

Canine
1st Molar
2nd Molar

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11
Q

T/F

3rd Molars have begun calcification at 8 y.o.

A

False

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12
Q

T/F

Permanent 2nd Molars have erupted at 8 y.o.

A

False

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13
Q

T/F

2nd Molars have erupted at 8 y.o.

A

False

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14
Q

What 4 teeth have not erupted at 11 y.o.

list in order of eruption

A

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

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15
Q 
Paleontological Terms for the following:
Mesiofacial cusp
*Distofacial cusp
Mesiolingual cusp
Distolingual cusp
A

Paraconus
*Metaconus
Protoconus
Hypoconus

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16
Q

Proximal Contact areas of the Maxillary Anterior Teeth:

A

IJJMJM

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17
Q

What periodontal fibers resist forceful impaction?

A

Oblique

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18
Q

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

*what wouldn’t we see?

A 
Malposition/misalignment
Oversized Proximal contacts
Lack Proximal contact
Fracture
Caries

*anything anatomically correct

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19
Q

T/F

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

A

True

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20
Q

Describe the cusp tip of the Primary Mandibular Canine

A

Mesial to center

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21
Q

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

A

Negative

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22
Q

3 lingual features of the Primary Mb Canines

A

Lingual ridge
Mesiolingual fossa
Distolingual fossa

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23
Q

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

A

Distally

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24
Q

T/F

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

A

True

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25
Q

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

A

Mesial half

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26
Q

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

A

Oblique

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27
Q

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

A

Rhomboidal

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28
Q

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

A

Mesiofacial
Mesiolingual
Distofacial
Distolingual

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29
Q

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

A

Central
Mesial Triangular
Distal Triangular

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30
Q

Crow convergence of the Primary Mb 1st Molar:

A

Lingual

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31
Q

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

A

Primary Mb 1st Molar

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32
Q

Primary Mb 2nd Molar:

Proximal contact areas located?

A

Middle 1/3

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33
Q

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

A

5

Facial

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34
Q

Primary Mb 2nd Molar:

Describe cervical line

A

Apical Dip in area of Bifurcation

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35
Q

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

A 
2 roots (mesial and distal)
Mesial Longer
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36
Q

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

A

Gammate

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37
Q

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

A

Mesiodistal (8.5mm)
Faciolingual (7.0 mm)

Centered

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38
Q

Permanent Max C.I.

The incisal edge is _____ and ____ to the mesiodistal bisecting plane

A

Straight

90 degrees

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39
Q

Permanent Max C.I.

Incisal edge is _____ to Faciolingual bisecting plane

A

Parallel

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40
Q

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

A

Mesiofacial

as opposed to Distofacial

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41
Q

Max L.I.

What shape is the crown?

A

Trapezoidal

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42
Q

Max L.I.

Which line angle more rounded?

A

Distal

but both described as rounded

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43
Q

Max L.I.

Describe the root apex

A

Distal curvature

44
Q

Mb C.I.

Describe proximal contact area

A

Faciolingual Midpoint

45
Q

Mb C.I.

Measurement of the crown facially is ____ greater than lingually

A

0.5 mm

46
Q

T/F

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

A

False

higher lingually

47
Q

Mb C.I.

The wide and long root surface depressions are deeper on what side?

A

Distal root surface

48
Q

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

A

Even

49
Q

Mb L.I.

Icisal Ridge is _____

A

Lingual

50
Q

Mb L.I.

The crest of the facial cervical ridge relates how to the lingual cervical ridge?

A

Higher Incisally

51
Q

Mb L.I.

Describe the Cervical Line from the mesial perspective

A

Curves Incisally at middle of tooth faciolingually

52
Q

Mb L.I.

What is a distinctive characteristic of the mesial view?

A

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

53
Q

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

A

Broad depression for most of length

54
Q

Max Canine

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

A

Aligned

55
Q

Max Canine

Where is the Pronounced Concavity?

A

Cervical to Distal contact area

*not really on/minimially on mesial surface

56
Q

Mb Canine

Which outline is straight and continuous?

A

Mesial

57
Q

Mb Canine
Cusp tip location:
Cervical line decription:

A

Mesial

Semicircular, dips apically

58
Q

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

*How much shorter?

A

Less pointed

*1.0 mm shorter

59
Q

Describe the Lingual cusp of the Max 1st Premolar

How relate to cuspal ridge length

A

Slightly mesial

*so Mesial cuspal Ridge Shorter

60
Q

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

A

Facial and Lingual cuspal ridges

Cervically

61
Q

Max 1st Premolar

The crest of the Mesial Marginal Ridge is ______ to the faciolingual long axis bisector

A

Perpendicular

62
Q

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

A

Distal

One third

Facial

63
Q

Max 1st Premolar

Describe the lingual cusp tip

A

Mesial

Nearer lingual outline than Facial cusp to facial outline

64
Q

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

A

Facial cusp

Halfway btwn faciolingual long axis bisector and greatest facial curvature

65
Q

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

A

Lingual

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

66
Q

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

A

Max 2nd Premolar

67
Q

Mb 1st Premolar

Describe lingual cusp tip (2 things)

A

Pointed

Centered

68
Q

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

Where are the consistent horizontal depressions located?

A

Mesiolingual

Mesiolingual/Distolingual

69
Q

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

A

Very long

Very short

70
Q

T/F

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

A

True

71
Q

Describe the occlusal aspect of the Mb 2nd Premolar

A

Nearly square

Little Lingual convergence

72
Q

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

A

Facial
Mesiolingual
Distolingual

73
Q

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

A

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

*same # Roots

74
Q

Max 1M

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

A

60%

40%

75
Q

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

A

Facial cervical ridge flattens distally

Facial

76
Q

Max 1M

Cusp sizes larges to smallest

A 
Mesiolingual
Mesiofacial
Distolingual
Distofacial 
5th
77
Q

Max 2M
Obtuse line angles
Acute line angles

A

Mesiolingual and Distofacial (obtuse)

Distolingual and Mesiofacial (acute)

78
Q

Max 2M

What is the most facially and mesially placed cusp?

A

Mesiofacial

79
Q

Max 2M

What is the most lingually and distally placed cusp?

A

Distolingual

80
Q

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

A

Closer

Central Pit

81
Q

Max 3M

Cusps largest to smallest

A

Mesiofacial
Mesiolingual
Distofacial
Distolingual

82
Q 
Mb 1M
There are 2 Facial Grooves, which one is shorter?
Where does the shorter one terminate?
What is at the terminus?
Containing?
A

Mesiofacial

Halfway to cervical line

Slight depression (lateral)

Facial (buccal) Pit

83
Q

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.

A

Flattened
Middle one third
Distal
Rarely

84
Q

Mb 1M

The angulation of the triangular ridge of the ____ cusp is ____ to the marginal ridge

A

Mesiofacial

Almost Parallel

85
Q

Mb 1M

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

A

30 degrees

86
Q

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

A

Distal Cusp

Slightly facial to

87
Q

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

A

Facial

88
Q

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

A

4

Central
Mesiofacial
Distofacial
Lingual

89
Q

Mb 1M - Occlusal

Describe how the Central Groove runs across the tooth

A

Mesiodistally

Irregular

90
Q

Mb 1M - Occlusal

Distofacial groove extends _____ at the ____ part of the sulcus

A

Distofacially

Deepest

91
Q

Mb 1M - Occlusal

The lingual groove starts at the central pit and travels ______ over to the lingual surface

A

Minimally

92
Q

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

A

truncated Rectangle
Distally
Rectangle

93
Q

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

A

3 major grooves

+

94
Q

Mb 2M - Occlusal

Where is the central pit located?

A

Lingual half of crown

95
Q

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

A

4

Central pit
Facial Pit
Mesial Triangular Pit
Distal Triangular Pit

*No lingual Pit

96
Q

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

A

Relatively deep root depression

Increases width occlusally from bifurcation to cervical line

97
Q

Max 1M - Mesial

Mesial root surface has what 2 concavities?

A

Trifurcation area

Wide and Shallow on Mesiofacial Root

98
Q

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

A

False

99
Q

Mb 1M

Root trunk measurement on the Facial Aspect

A

3.0 mm

100
Q 
Max 1PM
How often are there 2 Canals?
3 Canals?
1 Root?
2 Roots?
3 Roots?
A

83%
2%

23%
75%
2%

101
Q

Max 1M

Mesiofacial Root, % of 2 or more canals?

A

59.2%

102
Q

Max 1M

Distofacial Root, % of 2 or more canals?

A

1.7%

103
Q

Max 1M

Lingual Root, % of 1 canal?

A

99%

104
Q

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

A
  1. 9%

5. 2%

105
Q

Mb 1M

Mesial Root, % time 2 or more canals?

A

95.7%

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