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Dental Morphology > Primary Dentition > Flashcards

Primary Dentition Flashcards

1
Q

Teeth exfoliate ____

A

Between 7-12 years (just before the permanent teeth erupt)

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2
Q

Resorption begins:

A

1-2 years after root formation is completed

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3
Q

Where does resorption begin?

A

Apex of tooth

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4
Q

Why are primary teeth important? (5)

A
  1. Mechanical preparation of food
  2. Maintenance of space for permanent teeth
  3. Speech
  4. Appearance
  5. Stimulate growth of mandible and maxilla
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5
Q

What happens if we have early loss of the primary dentition?

A

Severe crowding may occur

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6
Q

The primary central incisor is replaced by:

A

Permanent central incisor

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7
Q

The primary lateral incisor is replaced by:

A

Permanent lateral incisor

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8
Q

The primary canine is replaced by the:

A

Permanent canine

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9
Q

The primary 1st molar is replaced by the:

A

Permanent 1st premolar

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10
Q

The primary 2nd molar is replaced by the:

A

Permanent 2nd premolar

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11
Q

The 20 permanent teeth that replace the primary teeth:

A

Succedaneous teeth

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12
Q

The other 12 permanent teeth which erupt distal to the primary second molars are called:

A

Accessional teeth

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13
Q

All the molars are considered:

A

Accessional teeth

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14
Q

In comparison with the permanent teeth, the primary teeth are:

A

Smaller in overall crown size and dimensions

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15
Q

In comparison to permanent teeth, the crowns of primary teeth are more:

A

Bulbous

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16
Q

In comparison to permanent teeth, the crowns of primary teeth are more bulbous because of:

A

More prominent/pronounced cervical ridges

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17
Q

In comparison to permanent teeth, the primary teeth have a more _____ cervical constriction

A

Pronounced

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18
Q

Primary teeth have a pronounced cervical constriction due to a constricted neck of the tooth due to:

A

Prominence of cervical bulge/ridges

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19
Q

Describe the color of primary teeth compared to permanent teeth:

A

Primary teeth are lighter in color

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20
Q

Describe the enamel of primary teeth compared to permanent teeth:

A

Enamel is thinner and has consistent thickness

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21
Q

The enamel thickness in permanent teeth is not:

A

Consistent

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22
Q

In a sectioned permanent tooth, where is the enamel the thickest?

A

In the occlusal 1/3

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23
Q

Describe the pulp chambers in primary teeth (compared to permanent teeth)

A

Large pulp chambers with prominent pulp horns

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24
Q

Describe the dentin thickness in primary teeth vs. permanent teeth

A

Dentist thickness is limited/thin over the pulp horns

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25
Q

In primary teeth compared to permanent teeth, the enamel rods are:

A

In a different direction than in permanent teeth

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26
Q

In primary teeth, the enamel rods at the cervix slope _____ or ______ instead of _____ as in the permanent tooth

A

Horizontally or occlusally ; gingivially

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27
Q

The occlusal surfaces in primary teeth are relatively smaller than in permanent teeth, this is considered:

A

Occlusal convergence

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28
Q

The roots in primary teeth are proportionately:

A

Longer and more slender

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29
Q

The roots on molars in primary teeth:

A

Have a shorter root trunk

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30
Q

The roots of posterior primary teeth are:

A

Very flared

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31
Q

Why are the roots of posterior primary teeth so flared?

A

Because the permanent teeth develop in between the roots of the molars

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32
Q

The primary maxillary central incisors develop from:

A

4 lobes

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33
Q

From a labial view of the primary maxillary central incisors, the root lengths is proportionately ____ than in the permanent central incisor

A

Greater

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34
Q

The root to crown ratio for the max primary central incisor:
The root to crown ratio for a max permanent central incisor:

A

10/6
13/10

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35
Q

The primary central incisors ___ width is greater than its ____ width

A

MD; IG

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36
Q

From a lingual view,

-the anatomy of the primary maxillary central incisor is similar to the _____
- the mesial and distal marginal ridges are _____
- the cingulum is very ____ and extends upwards towards ____
- the DI angle is ____

A

-permanent maxillary central incisor
-well developed
-pronounced ; incisal edge
-more rounded

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37
Q

On the primary maxillary central incisor, what is responsible for dividing the lingual fossa partially into MD and DL fossa?

A

Cingulum

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38
Q

The primary maxillary central incisor from mesial and distal views, has extremely well developed ______ in the ___ of the tooth.

A

Lingual and facial cervical ridges; cervical 1/3

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39
Q

In the primary maxillary central, describe the shape of the root:

A

Cone-shaped, long, slender

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40
Q

Describe the crown dimensions in the primary maxillary central incisor:

A

MD>BL
MD> IG

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41
Q

On a primary maxillary central incisor, the crown tapers from:

A

Facial to lingual

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42
Q

The primary maxillary lateral incisor is similar to the primary central incisor except for: (2)

A
  1. IG length is greater than the MD width
  2. DI angle is more rounded than the central incisor
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43
Q

The primary maxillary canine:
-has how many cusps?
-what feature is very pronounce?
- what cusp slope is longer?

A

-1
-cervical constriction
-mesial (opposite of permanent)

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44
Q

Primary maxillary canine from a facial aspect:

-Compare the cusp height in the primary to the permanent
-Describe the location of the M and D contacts

A
  • cusp height is longer in primary than in permanent
    -M and D contacts areas are at the same level
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45
Q

The primary maxillary canine from a lingual aspect:

  • what anatomical features are present? (4)
A
  1. Mesial and distal marginal ridges
  2. Lingual ridge
  3. ML and DL fossa
  4. Cingulum
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46
Q

From a lingual aspect of the primary maxillary canine-

The root is:

A

Very long- almost twice as long as the crown

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47
Q

The primary mandibular central incisor:

  • Is the ____ tooth in the mouth
  • the root is ___ & ___
    -the root is _____ compared to the crown
  • there are pronounced ______ on the facial and lingual aspects
A
  • smallest
  • long and slender
    -2x the length of crown
  • cervical buldges
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48
Q

The primary mandibular lateral incisor:

  • The crown is similar to the central incisor but is slightly _____
  • The lingual anatomy may be ____ due to ____ & _____
  • The disto-incisal angle is ____
A

-longer
-more pronounced due to more prominent marginal ridges and a deeper lingual fossa
-slightly rounded

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49
Q

The primary mandibular canine:

  • compared to the primary maxillary canine this canine does not have as much ______and can be said to have _____
A

Cervical constriction; thicker neck

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50
Q

The primary mandibular canine:

  • The cervical ridges are ____ compared to the primary maxillary canine
A

Not as pronounced as primary maxillary canine

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51
Q

The primary mandibular canine is not as wide _____ compared to the primary maxillary canine

A

FL

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52
Q

The primary mandibular canine:

  • The distal cusp slope is ____ than the mesial cusp slope
A

Longer

53
Q

Primary or permanent?
1. Crowns are more bulbous
2. Darker in color
3. Thicker enamel of varied thickness
4. Pronounced cervical constriction
5. Large pulp chambers with prominent pulp horns
6. Longer root trunks

A
  1. Primary
  2. Permanent
  3. Permanent
  4. Primary
  5. Primary
  6. Permanent
54
Q

The primary maxillary 1st molar resembles:

A

Permanent premolar

55
Q

The primary maxillary 2nd molar resembles the:

A

Permanent maxillary 1st molar

56
Q

The mandibular 1st molar resembles:

A

No other tooth in the mouth

57
Q

The mandibular 2nd molar resembles:

A

Permanent mandibular 1st molar

58
Q

The primary maxillary 1st molars resembles a ____ and has ____ roots: name them

A

Premolar- 3 roots, 2 buccal and 1 lingual

59
Q

The primary maxillary 1st molar has a ____ shaped occlusal surface with ____ cusps

A

Triangular shaped; 3-4 cusps

60
Q

If the primary maxillary 1st molar has 3 cusps they are _____. If it has 4 cusps they are ____.

A

MF, DF and lingual

MF, DF, ML, DL

61
Q

The primary maxillary 1st molar from a buccal view:

-very ____ relative to width of crown
- Cusps are ____
- Much ____ than maxillary 2nd molar
- Compare the MB and DB cusps

A

-narrow cervix
-poorly defined
- much smaller tooth (almost premolar-like)
- MB cusp> DB cusp

62
Q

The primary maxillar 1st molar: from a buccal view:

  • The roots are ____, ____, and ____
  • ____ roots are visible
  • The root trunk is ___ (CEJ to furcation)
  • ____ buccal present
A
  • long, slender, widely spread
  • All 3 roots
  • very short
  • 2 buccal
63
Q

The primary maxillary 1st molar from a lingual view:

  • The crown converges:
  • # cusps present
  • The ___ cusp is the largest and longest cusp on this tooth
  • Describe the DL cusp
  • From this view what root(s) do we see? Describe it
A
  • lingually
  • 1 or 2
  • ML
  • Small or absent DL cusp
  • 1 lingual root, largest root
64
Q

The primary maxillary 1st molar: mesial and distal views:

  • The crown is the widest in the ____
    The crown is is narrower _____ (buccolingually) than on the ____
A
  • cervical 1/3
    -distal; mesial
65
Q

The primary maxillary 1st molar has a very prominent on the _____ aspect.

A

Convexity; MB

66
Q

What is an outstanding characteristic in regard to the primary maxillary 1st molar?

A

Prominent convexity on the MB aspect

67
Q

The primary maxillary 1st molar: occlusal view:
- roughly ___ in outline with a broad base ____
- _____ cusp is the largest, longest and sharpest
- _____ cusp is the smallest and may be absent

A
  • triangular; bucally
  • ML cusp
  • DL cusp
68
Q

Primary maxillary 1st molar from and occlusal view:
- List the anatomical features from this view: (5)

A
  1. Central fossa
  2. mesial & distal triangular fossa
  3. Central, buccal and distal developmental grooves
  4. Mesial & central pits
  5. Oblique ridge
69
Q

What does the oblique ridge connect on the primary maxillary 1st molar?

A

The oblique ridge connects the ML and DB cusps

70
Q

The primary maxillary 2nd molar:
- resembles ____.
- ____ in outline
- Name the cusps present

A
  • permanent maxillary 1st molar
  • rhomboidal
  • ML, MB, DB, DL & cusp of carabelli
71
Q

The primary maxillary 2nd molar has a ____ ridge

A

Oblique ridge

72
Q

The primary maxillary second molar has the same fossa and groove present as the:

A

Permanent maxillary 1st molar

73
Q

What roots are present on the primary maxillary 2nd molar?

A

MB, DB, L

74
Q

The primary maxillary 2nd molar: in comparison with the permanent maxillary 1st:
- ____ very close to CEJ (short root trunk)
- Cervix is much _____ compared to the MD diameter at the contact points

A
  • Trifurcation
  • much narrower MD
75
Q

The primary maxillary 2nd molars may be clinically confused with:

A

Permanent maxillary 2nd molar (deciduous max 2nd molar is smaller)

76
Q

The primary mandibular 1st molar:

  • ___ cusps are presents; name them
  • _____ roots are present; name them
A
  • 4 cusps (MB, ML, DB, DL)
  • 2 roots (mesial and distal)
77
Q

The roots of the primary mandibular 1st molar are: (2)

A
  1. Roots are slender and widely splayed
  2. Short root trunk
78
Q

The primary mandibular 1st molar resembles what tooth?

A

It does not resemble any other tooth primary or permanent

79
Q

The primary mandibular 1st molar: buccal view:

  • The crown height on mesial is ____ that of distal
  • The CEJ dips _____ on the ____
  • _____ is flat or straight
  • The distal is markedly ___
A
  • twice
  • apically on mesial
  • mesial contour
  • convex
80
Q

The primary mandibular 1st molar: buccal view

  • 2 distinct _____, no ____
  • Extremely prominent ____ convexity
A

-Buccal cusps, no developmental groove
- MB convexity

81
Q

The primary mandibular 1st molar: buccal view:

What causes the extremely prominent MB convexity?

A
  1. Prominent MB line angle
  2. Prominent MB cervical ridge
82
Q

The primary mandibular 1st molar: lingual view
- What cusps are present?
- The ML cusp is ____
- the ML cusp is in line with ____
- the mesial marginal ridge is well developed and looks like ____.

A
  • ML and DL
  • centered in the tooth
  • mesial root
  • almost like another cusp
83
Q

The primary mandibular 1st molar: mesial and distal views:

  • Extreme ___ buccally on the ___ cusp
A

Convexity bucally on the MB cusp

84
Q

The primary mandibular 1st molar: mesial and distal views

  • Describe the buccal surface:
A
  • flattened
85
Q

The primary mandibular 1st molar: mesial and distal views:

Describe the mesial root
Describe the distal root

A

Mesial root: rectangular appearance
Distal root: tapers at the apex

86
Q

From an occlusal view, the primary mandibular 1st molar is ___ in outline

A

Rhomboidal

87
Q

From and occlusal view, the primary mandibular 1st molar:

  • how many cusps are present? Name them
A

4 cusps- ML, MB, DL ,DB

88
Q

From and occlusal view, the primary mandibular 1st molar:

Which cusps is largest and what is the location of it?

A

ML cusp is largest and centered in the lingual aspect

89
Q

From and occlusal view, the primary mandibular 1st molar:

The mesial and distal triangular fossae are joined by:

A

Central developmental groove

90
Q

From and occlusal view, the primary mandibular 1st molar:

The triangular ridges of the MB and ML cusps form:

A

Transverse ridge

91
Q

The primary mandibular first molar from an occlusal view- what development grooves are present? What pits are present?

A

Lingual and buccal developmental grooves; mesial pit and central pit

92
Q

The primary mandibular 2nd molar:

-closely resembles what tooth?
- How many cusps are present?
- What are the cusps present?
-Which cusps are more equal in size?

A
  • permanent mandibular 1st molar
  • 5 cusps
  • 3 buccal, and 2 lingual
  • buccal cusps
93
Q

The distal cusp of the primary mandibular 2nd molar is ____ compared to the permanent mandibular 1st molar:

A

Relatively larger

94
Q

On the primary mandibular 2nd molar the 2 lingual cusps are:

A

Equal in size

95
Q

In the primary mandibular 2nd molar, the roots present are:

A

Mesial and distal roots (2)

96
Q

In the primary mandibular 2nd molar, in comparison with the permanent mandibular 1st molar:

  • The birfurcation of the root is:
  • The roots are ____
  • the ____ cusps are more equal in size
  • A cervical ____ is present
A
  • close to CEJ
  • Roots flared
  • 3 buccal cusps
  • cervical constriction
97
Q

A space that exists mesial to the primary maxillary canine and distal to the primary mandibular canine in some deciduous dentitions:

A

Primate space

98
Q

The primate space is a spaces that exists _____ to the primary _____, and ____ to the primary ____ in some deciduous dentitions

A

Mesial to the primary maxillary canine & distal to the primary mandibular canine

99
Q

The combined MD widths of permanent premolars and the permanent canine is less than on the combine mesiodistal widths of primary molars and primary canine. This surplus space is called:

A

Leeway space

100
Q

The leeway space occurs with what teeth in the primary dentition for what teeth in the permanent dentition?

A

Primary canines and primary molars

Permanent premolars and permanent canine

101
Q

Label what these arrows are pointing to:

A

Top: cervical ridge
Bottom: cervical constriction

102
Q

What tooth is in this image?

A

Primary maxillary central incisor

103
Q

This incisal view shows:

A

Primary maxillary central incisor

104
Q

This image shows what tooth?

A

Primary maxillary lateral incisor

105
Q

This image shows

A

Primary maxillary canine

106
Q

This image shows:

A

Mandibular central incisor

107
Q

This image shows:

A

Primary Mandibular lateral incisor

108
Q

This image shows:

A

Mandibular canine

109
Q

What tooth what view?

A

Primary maxillary 1st molar; buccal view

110
Q

What tooth what view?

A

Primary maxillary 1st molar; lingual view

111
Q

What tooth what view?

A

Primary maxillary 1st molar; occlusal view

112
Q

What tooth what view?

A

Primary maxillary 1st molar mesial view

113
Q

What tooth what view?

A

Primary maxillary 1st molar- distal

114
Q

What tooth what view?

A

Primary maxillary 1st molar; mesial view

115
Q

What tooth? What view? Which side is mesial?

A

Primary maxillary 1st molar, occlusal view, A= mesial

116
Q

Name the labeled anatomy:

A

Left triangle: mesial triangular fossa
Right triangle: distal triangular fossa
Light green: central developmental groove
Scrub green: distal developmental groove
Blue line: buccal developmental groove
Left pit: mesial pit
Center pit: central pit

117
Q

What tooth what view?

A

Primary maxillary 2nd molar; buccal view

118
Q

What tooth what view?

A

Primary maxillary 2nd molar: lingual view

119
Q

What tooth what view?

A

Primary maxillary 2nd molar; occlusal view

120
Q

What tooth what view?

A

Primary mandibular 1st molar; buccal view

121
Q

What tooth what view?

A

Primary Mandibular 1st molar; lingual view

122
Q

What tooth what view?

A

Primary mandibular 1st molar- mesial view

123
Q

What tooth what view?

A

Primary mandibular 1st molar: distal view

124
Q

What tooth what view?

A

Primary mandibular 1st molar occlusal view

125
Q

List the cusps and anatomy of the tooth; what tooth is this?

A

Primary mandibular 1st molar,
light green line: transverse ridge
Left blue triangle: mesial triangular fossa
Right blue triangle: distal triangular fossa
Green triangles : MB and ML triangular ridges
Left: mesial
Right: distal
Bottom: lingual?
Top: distal?

126
Q

What tooth what view?

A

Primary mandibular 2nd molar: buccal view

127
Q

What tooth what view?

A

Primary mandibular 2nd molar; lingual view

128
Q

What tooth what view?

A

Primary mandibular 2nd molar; occlusal view

Dental Morphology (11 decks)

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