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Tim's Cards > Dental Anatomy III - Test I > Flashcards

Dental Anatomy III - Test I Flashcards

1
Q

What crown remains static throughout a lifetime?
What changes?
In what direction?

A

Anatomic
Clinical
Apically

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2
Q

What are the 2 types of triangular ridges emanating off of cusps?

A

Facial
(not lingual)
Lingual
(not facial)

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3
Q

Where do lingual ridges extend to/from on Canines?

A

Cusp tip to Cingulum

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4
Q

What process occurs in the tooth follicle?

What does the follicle contain?

A

Center of Calcification

Odontogenic Organ

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5
Q

What develops from “lobes”?

A

Positive Anatomy

*cusp tips/Incisal edges

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6
Q

What forms Negative Anatomy?

A

Merging centers of calcification

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7
Q

What develops last in the tooth?

A

Roots

*ending with Apex

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8
Q

In what direction does Calcification occur?

A

From Incisal edges/cusps to apex

*Apical 1/3 of root calcifies last

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9
Q

What are the 3 Primary teeth to first complete Root Formation?
At what age?

A

Maxillary Central Incisor
Mandibular Central/Lateral Incisors

1.5 years

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10
Q

What 2 Primary teeth calcify last?

What age?

A

Canines

3.25 years

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11
Q

What age is typical for all teeth to have emerged except the Primary 2nd Molars?
At this stage, what is happening to the Permanent teeth?

A

20 Months

Calcification begins

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12
Q

When does Calcification of Primary dentition begin?

A

13-16 weeks In Utero

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13
Q

When have all Primary teeth initiated calcification?

A

18-20 weeks in utero

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14
Q

T/F
Maxillary teeth usually erupt before their Mandibular counterparts
(Primary Teeth)

A

False

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15
Q

T/F

Males usually erupt Primary dentition before females

A

False

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16
Q

T/F

Initial Mineralization of Primary Dentition is entirely prenatal

A

True

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17
Q

What is the last primary tooth to emerge?

When?

A

2nd Molar

29 Months

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18
Q

At 3.25 years, what is usually complete?

A

Root formation

*39 months

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19
Q

When does the Primate Space begin to form?

A

4 years

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20
Q

When is Primary tooth occlusion evident?

A

3 years

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21
Q

List the permanent teeth that are succedaneous to the primary teeth.

A

C. and L. incisors
Canines
1st and 2nd Premolars

*premolars replace molars

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22
Q

What 2 teeth emerge around 11 years?

In what order?

A

Mandibular 2nd Premolar

Maxillary Canine

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23
Q

In a Haplodont, what cusp is Maxillary?

Mandibular?

A

Protocone

Protoconid

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24
Q

In the Triconodont and Tritubercular, what cusps are Maxillary?

Mandibular?

A

Paracone, Protocone, Metacone

Paraconid, Protoconid, Metaconid

  • these are listed mesial to distal
  • *Protoconid always middle
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25
Q 
Match the following terms in Humanoid Mandibular Molars:
Mesiofacial cusp
Distofacial cusp
Distal cusp (accessory cusp)
Distolingual cusp
Mesiolingual cusp
A 
Protoconid
Hypoconid
Hypoconulid
Entoconid
Metaconid
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26
Q

What are the Proximal reference angles for the following Maxillary teeth:
Central Incisor
First Premolar
Second Premolar

A

28 degrees

5 degrees

6 degrees

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27
Q

What are the facial reference angels for the following Maxillary teeth:
Central Incisor
Canine

A

2 degrees

17 degrees

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28
Q

From the vertical axis, the least deviation is seen in which teeth?

(2 teeth, 2 views)

A

Maxillary C.I.
(2 degrees, facial view)
1st Premolar
(5 degrees, proximal view)

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29
Q

Why is the ideal plane of occlusion not flat?

A

Too many contacts in posterior teeth

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30
Q

What does a proper plane of occlusion allow for?

A

Functional contacts

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31
Q

What does a curved plane of occlusion allow for?

A

Maximum use tooth contacts during function

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32
Q

What shape does the Proximal Contact Area have in Anterior incisal Teeth?

A

Incisogingival ovoid

*contact creates embrasures

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33
Q

What Proximal Contact area of the Mandibular Anterior Teeth is not in the Incisal Third?

A

Distal of Canine

*Middle third

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34
Q

What type of Proximal Contact point is absent in the Mandibular Anterior Teeth?

A

Junctional

*Incisal or Middle 1/3 (for distal canine)

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35
Q

In what direction does the Proximal Cervical Line bend in the Mandibular Arch?
Where/Measurement in largest bend?

A

Coronal

C.I. 3.0 mm mesial and 2.0 mm distal

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36
Q

What Periodontal fibers resist impaction of tooth into alveolus?

A

Oblique

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37
Q

What Periodontal fibers help maintain proximal contacts?

A

Transseptal

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38
Q

Name 8 types of Periodontal Fibers

A 
Gingival
Alveolar crest
Circumferential
Transseptal
Horizontal
Oblique
Apical
Interradicular
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39
Q

Both permanent and primary teeth taper faciolingually. What is the consistent exception?
What are the 2 occasional exception?

A

Permanent Maxillary 1st Molar

Mandibular 2nd Premolar (Y type)
Primary Maxillary 2nd Molar

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40
Q

What 2 types of line angles are usually more developed?

A

Facial

Mesial

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41
Q

4 points of comparison for Primary vs. Permanent molar

A

Smaller size
Prominent Cervical Ridges
Slender Roots
Widely separated Roots

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42
Q

How does the Cervical 1/3 compare in Permanent vs Primary molar?

A

Flatter contour

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43
Q 
Primary Maxillary Lateral Incisor - Incisal view
Crown tapers...
Incisal ridge curves toward...
Slight concavity...
Lingual fossa...
A

Lingually
Facial
Distolingual Profile***
Modestly deep

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44
Q

What is the crown shape of the Facial View of the Primary Maxillary Canine?

A

Diamond

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45
Q

Where is the cusp positioned in the Primary Maxillary Canine?
Makes what Cuspal Ridge longer?

A

Slightly distal

Mesial cuspal ridge

46
Q

How is the Facial Ridge positioned in the Primary Maxillary Canine?

A

Slightly on Distal half

47
Q

The root length is ____ the crown length in the Primary Maxillary Canine
The root is curved…

A

2x

distally

48
Q

What cusp is not visible in the Mesial view of the Primary Maxillary 2nd Molar?

How many other cusps are there?

A

Distolingual

4

49
Q

Which mesial cusp of the Primary Maxillary 2nd Molar is larger?
More pointed?

A

Mesiolingual

Mesiofacial

50
Q

What separates the lingual and facial in the Mesial view of the Primary Maxillary 2nd Molar?

A

Mesial Marginal Ridge groove

51
Q

How does the crown of the Primary Maxillary 2nd Molar converge from the mesial view?
Cervical line curvature?

A

Toward Occlusal

negligible

52
Q

What roots are notable from the Mesial view of the Primary Maxillary 2nd Molar?
How many roots visible from this view?

A

Lingual deviates outside crown

2

53
Q

T/F

The roots of the Primary Maxillary 2nd molar are longer than the 1st.

A

True

54
Q

What root takes up 2/3 of the CEJ in the Primary Maxillary 2nd molar?

A

Mesiofacial root

55
Q

What is the length of the Root Trunk from the mesial view of the Primary Maxillary 2nd Molar?

A

2-3 mm

56
Q

T/F

The mesial surface outline of the Primary Mandibular 1st molar is curved

A

False

Flat

57
Q

Where are the proximal contact areas of the Primary Mandibular 1st Molar?

A

Occlusal portion Middle Third

58
Q

From the facial view of the Primary Mandibular 1st Molar, what cusp is larger?
What separated cusps?

A

Mesiofacial

Facial developmental groove (indistinct)

59
Q

Describe the cervical line from the facial view of the Primary Mandibular 1st Molar

Describe cervical ridge

Describe Mesial Root

A

Dips apically in Mesial half

Convex Mesial half

Longer and straighter

60
Q

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

A

Crown 20% taller

Root 1/3 longer

61
Q

What cervical crown is more prominent in the Primary Mandibular 2nd Molar?
Where is the lingual height of contour?

A

Facial

Middle 1/3

62
Q

Describe the Mesial Marginal Ridge in a Primary Mandibular 2nd Molar.

A

Very high
Deep marginal ridge groove

(obscures other topography from mesial view)

63
Q

T/F

The height of curvature of the cervical line in the Primary Mandibular 2nd Molar is minimal from the mesial view

A

True

64
Q

What roots can be seen in the Primary Mandibular 2nd Molar from the mesial view?

A

only mesial

65
Q

Describe the Mesial Root of the Primary Mandibular 2nd Molar.

A

Faciolingually Wide
Long Root Surface Depression
Blunt, serrated Apex

66
Q

Where is the long root surface depression of the mesial root in the Primary Mandibular 2nd Molar deepest?

A

Apical 1/3

67
Q

T/F

Coronal and radicular forms of Dens-in-Dente exist

A

True

68
Q

What results from an infolding of dental papilla during development?
What tooth usually affected?

A

Dens-in-Dente

Lateral Maxillary Incisor

69
Q

What is usually found in distal 1/3 of molars and facial root furcations?

A

Enamel Pearls

70
Q

What are Enamel Projections?

A

Extensions crown onto root surface between roots

71
Q

How much shorter is the crown of the Maxillary L.I. compared to the C.I.?
How much less is the crown width?

A
  1. 0-1.5 mm

2. 0 mm

72
Q

Describe the crown outline of the Maxillary Lateral Incisor.

A

Trapezoidal

73
Q

Where is the mesial proximal contact area for the Maxillary Lateral Incisor?
Distal contact area?

A

Junction incisal and middle 1/3’s

Middle 1/3

74
Q

What direction does the root apex of the Maxillary Lateral Incisor curve?

A

Distally

75
Q

How will the incisal edge of the Mandibular Central Incisors be positioned?

A

Lingually

76
Q

How much bigger is the enamel edge on the facial side of the Mandibular Central Incisors?

A

0.5 mm

77
Q

What are 2 prominent features of the root in the Permanent Mandibular Central Incisor?

A

Blunt root end

Wide longitudinal root depression extending most of length of root

78
Q

T/F
Canines are the longest teeth in the mouth, contribute “canine guidance” to functional occlusion, are considered anterior teeth, provides for smile line

A

True

79
Q

What shape does a Permanent Maxillary Canine have from the Incisal view?

A

Diamond

80
Q

Where is the cusp located in the Permanent Maxillary Canine?

A

Slightly mesial and facial

*Never distal or lingual

81
Q

Where is there a slight concavity seen in the incisal view of the Permanent Maxillary Canine?

A

Distofacially

82
Q

The facial outline of the crown and root form what shape in the permanent Mandibular Canine?

A

C - shaped

smooth with no visible concavity

83
Q

What cusp is taller in the Maxillary 1st Premolar?

By how much?

A

Facial

1.0 mm

84
Q

How are the cusp tips of the Maxillary 1st Premolar positioned?
What cuspal ridge is longer?

A

Mesially

Distal

85
Q

Describe the shape of the mesial and distal outlines of the Lingual Cusp of the Maxillary 1st Premolar.

A

Slightly convex

86
Q

T/F

The crown surface cervical to the level of the contact area will be concave and smooth

A

False

*convex

87
Q

From what perspective is the root depression smaller and shallower in the Maxillary 1st Premolar?
T/F
It does not cross the cervical line

A

Distally

True

88
Q

Describe the cervical 1/3 of the Root Trunk in the Maxillary First Premolar on the distal surface

A

Convex

89
Q

Describe the Cervical Line and Cervical Ridge in the Maxillary 1st Premolar.

A

Line - little to no curvature

Ridge - 0.5 mm extension outward from the CEJ

90
Q

What cusp ridge is shorter in the Maxillary 1st Premolar?

A

Mesial

91
Q

Where do triangular ridges meet in the Maxillary 1st Premolar?
What usually inhibits a transverse ridge from forming?

A

Center of Occlusal Table

Deep Central Groove

92
Q

Describe the position of the central groove in the Maxillary 1st Premolar.
What does it connect?
What extension does it have?

A

Slightly lingual

Mesial and Distal triangular fossae

Mesial Marginal Ridge Developmental Groove

93
Q

T/F

Marginal ridges of the Maxillary 1st Premolar are narrow mesiodistally

A

True

94
Q

What does the cervical, distal, and mesial outlines of the Maxillary 2nd Premolar produce in appearance?

A

Oval shape

*this is lingual surface

95
Q

Describe the root from the Lingual view in Permanent Maxillary 2nd Premolar

A

Narrower than Facial surface of root

96
Q

Describe the roots of the Maxillary 2nd Premolar

A

One root

Apex curves distally

97
Q

What is found on the root of the Maxillary 2nd Premolar from the distal view?

A

Longitudinal Depression

*confined to root

98
Q

T/F

Root depressions are found on mesial and distal aspects of the Maxillary 2nd Premolar and sometimes bifurcates

A

False

*Does not bifurcate

99
Q

T/F

The distal contact area of the Maxillary 2nd Premolar is centered faciolingually

A

True

100
Q

The mesial and distal cuspal ridges of the Maxillary 2nd Premolar are straight, unaligned, and meet facial cusp at an acute angle.

A

False

*obtuse angle

101
Q

The occlusal table is ______ despite the cuspal ridges forming a _______

A

Rectangular

Continuous Elliptical Arc

102
Q

Why does the Maxillary 2nd Premolar have a short central groove and wide marginal ridges?

A

Triangular fossae irregular and close together

103
Q

What premolar is considered to be nearly bilaterally symmetrical from the facial view?

A

Mandibular 1st Premolar

104
Q

Even though the Mandibular 1st Premolar is considered symmetrical, which cuspal ridge is longer?

This means?

A

Distal

Cusp ever so slightly mesial

105
Q

How does the triangular ridge of the Mandibular 1st Premolar look from the mesial view?

A

Steeply inclined

106
Q

Describe the Lingual Cusp Triangular Ridge and the Central Groove of the Mandibular

A

Short, horizontall-ish

Groove lingual

107
Q

What angle is the crest of the Mesial Marginal Ridge in the Mandibular 1st Premolar?

A

45 degrees

108
Q

Where is the mesiolingual groove located in the Mandibular 1st Premolar?

A

Mesiolingual line angle

109
Q

Where is the Lingual Groove positioned in the Mandibular 2nd Premolar?
(this is 3 cusp variety)

A

Distally

110
Q

Which cusp tip is shorter in the Mandibular 2nd Premolar?

By how much?

A

Mesiolingual (3 cusp variety)

1.5 mm

111
Q

The distolingual cusp tip is ____ shorter than the facial cisp tip in the Mandibular 2nd Premolar

A

2.0 mm

112
Q

What lingual cusp is wider in the 3 cusp variety Mandibular Second Molar?

A

Distolingual

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