Dental Anatomy III - Test I Flashcards Preview

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

Flashcards in Dental Anatomy III - Test I Deck (112):
1

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

Anatomic
Clinical
Apically

2

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

Facial
(not lingual)
Lingual
(not facial)

3

Where do lingual ridges extend to/from on Canines?

Cusp tip to Cingulum

4

What process occurs in the tooth follicle?
What does the follicle contain?

Center of Calcification

Odontogenic Organ

5

What develops from "lobes"?

Positive Anatomy

*cusp tips/Incisal edges

6

What forms Negative Anatomy?

Merging centers of calcification

7

What develops last in the tooth?

Roots

*ending with Apex

8

In what direction does Calcification occur?

From Incisal edges/cusps to apex

*Apical 1/3 of root calcifies last

9

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

Maxillary Central Incisor
Mandibular Central/Lateral Incisors

1.5 years

10

What 2 Primary teeth calcify last?
What age?

Canines

3.25 years

11

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?

20 Months

Calcification begins

12

When does Calcification of Primary dentition begin?

13-16 weeks In Utero

13

When have all Primary teeth initiated calcification?

18-20 weeks in utero

14

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

False

15

T/F
Males usually erupt Primary dentition before females

False

16

T/F
Initial Mineralization of Primary Dentition is entirely prenatal

True

17

What is the last primary tooth to emerge?
When?

2nd Molar

29 Months

18

At 3.25 years, what is usually complete?

Root formation

*39 months

19

When does the Primate Space begin to form?

4 years

20

When is Primary tooth occlusion evident?

3 years

21

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

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

*premolars replace molars

22

What 2 teeth emerge around 11 years?
In what order?

Mandibular 2nd Premolar
Maxillary Canine

23

In a Haplodont, what cusp is Maxillary?

Mandibular?

Protocone

Protoconid

24

In the Triconodont and Tritubercular, what cusps are Maxillary?

Mandibular?

Paracone, Protocone, Metacone

Paraconid, Protoconid, Metaconid

*these are listed mesial to distal
**Protoconid always middle

25

Match the following terms in Humanoid Mandibular Molars:
Mesiofacial cusp
Distofacial cusp
Distal cusp (accessory cusp)
Distolingual cusp
Mesiolingual cusp

Protoconid
Hypoconid
Hypoconulid
Entoconid
Metaconid

26

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

28 degrees

5 degrees

6 degrees

27

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

2 degrees

17 degrees

28

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

(2 teeth, 2 views)

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

29

Why is the ideal plane of occlusion not flat?

Too many contacts in posterior teeth

30

What does a proper plane of occlusion allow for?

Functional contacts

31

What does a curved plane of occlusion allow for?

Maximum use tooth contacts during function

32

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

Incisogingival ovoid

*contact creates embrasures

33

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

Distal of Canine

*Middle third

34

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

Junctional

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

35

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

Coronal

C.I. 3.0 mm mesial and 2.0 mm distal

36

What Periodontal fibers resist impaction of tooth into alveolus?

Oblique

37

What Periodontal fibers help maintain proximal contacts?

Transseptal

38

Name 8 types of Periodontal Fibers

Gingival
Alveolar crest
Circumferential
Transseptal
Horizontal
Oblique
Apical
Interradicular

39

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

Permanent Maxillary 1st Molar

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

40

What 2 types of line angles are usually more developed?

Facial
Mesial

41

4 points of comparison for Primary vs. Permanent molar

Smaller size
Prominent Cervical Ridges
Slender Roots
Widely separated Roots

42

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

Flatter contour

43

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

Lingually
Facial
Distolingual Profile***
Modestly deep

44

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

Diamond

45

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

Slightly distal

Mesial cuspal ridge

46

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

Slightly on Distal half

47

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

2x

distally

48

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

How many other cusps are there?

Distolingual

4

49

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

Mesiolingual

Mesiofacial

50

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

Mesial Marginal Ridge groove

51

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

Toward Occlusal

negligible

52

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

Lingual deviates outside crown

2

53

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

True

54

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

Mesiofacial root

55

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

2-3 mm

56

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

False

Flat

57

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

Occlusal portion Middle Third

58

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

Mesiofacial

Facial developmental groove (indistinct)

59

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

Describe cervical ridge

Describe Mesial Root

Dips apically in Mesial half

Convex Mesial half

Longer and straighter

60

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

Crown 20% taller

Root 1/3 longer

61

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

Facial

Middle 1/3

62

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

Very high
Deep marginal ridge groove

(obscures other topography from mesial view)

63

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

True

64

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

only mesial

65

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

Faciolingually Wide
Long Root Surface Depression
Blunt, serrated Apex

66

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

Apical 1/3

67

T/F
Coronal and radicular forms of Dens-in-Dente exist

True

68

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

Dens-in-Dente

Lateral Maxillary Incisor

69

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

Enamel Pearls

70

What are Enamel Projections?

Extensions crown onto root surface between roots

71

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

1.0-1.5 mm

2.0 mm

72

Describe the crown outline of the Maxillary Lateral Incisor.

Trapezoidal

73

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

Junction incisal and middle 1/3's

Middle 1/3

74

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

Distally

75

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

Lingually

76

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

0.5 mm

77

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

Blunt root end
Wide longitudinal root depression extending most of length of root

78

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

True

79

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

Diamond

80

Where is the cusp located in the Permanent Maxillary Canine?

Slightly mesial and facial

*Never distal or lingual

81

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

Distofacially

82

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

C - shaped

(smooth with no visible concavity)

83

What cusp is taller in the Maxillary 1st Premolar?
By how much?

Facial

1.0 mm

84

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

Mesially

Distal

85

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

Slightly convex

86

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

False

*convex

87

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

Distally

True

88

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

Convex

89

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

Line - little to no curvature

Ridge - 0.5 mm extension outward from the CEJ

90

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

Mesial

91

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

Center of Occlusal Table

Deep Central Groove

92

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

Slightly lingual

Mesial and Distal triangular fossae

Mesial Marginal Ridge Developmental Groove

93

T/F
Marginal ridges of the Maxillary 1st Premolar are narrow mesiodistally

True

94

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

Oval shape

*this is lingual surface

95

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

Narrower than Facial surface of root

96

Describe the roots of the Maxillary 2nd Premolar

One root

Apex curves distally

97

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

Longitudinal Depression

*confined to root

98

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

False

*Does not bifurcate

99

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

True

100

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

False

*obtuse angle

101

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

Rectangular
Continuous Elliptical Arc

102

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

Triangular fossae irregular and close together

103

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

Mandibular 1st Premolar

104

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

This means?

Distal

Cusp ever so slightly mesial

105

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

Steeply inclined

106

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

Short, horizontall-ish

Groove lingual

107

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

45 degrees

108

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

Mesiolingual line angle

109

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

Distally

110

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

Mesiolingual (3 cusp variety)

1.5 mm

111

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

2.0 mm

112

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

Distolingual

Decks in Tim's Cards Class (140):