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BOARDS > 300 Dental Anatomy Facts > Flashcards

300 Dental Anatomy Facts Flashcards

1
Q

Primary teeth are MORE or LESS mineralized that permanent teeth?

A

Less

May appear more worn

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2
Q

What is the difference in space between the primary dentition and permanent dentition

A

2-4mm

Primary dentition is more square and squatty shaped

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3
Q

Mammelons that remain after age 10 indicate what?

A

An open bite

Typically the dention will fall into lateral excursion and wear off the mammelons by teeth occluding in a closed bite

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4
Q

When does calcification of primary dentition complete?

A

Age 3-4 years old

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5
Q

What is the order of eruption for primary dentition?

A 
Centrals
Laterals
1st molars
Canines
2nd molars
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6
Q

Erruption:
Front to back besides canines
Manibulars before maxillarys except _____

A

Laterals

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7
Q

Maxillary PRIMATE space

A

Between the lateral and canine

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8
Q

Mandibular PRIMATE space

A

Between the canine and the 1st premolar (adults)

Between the canine and 1st molar (children)

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9
Q

What is the primate space?

A

Space created to accommodate the larger jaw and larger adult dentition

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10
Q

What is primary spacing?

And what is it caused by?

A

Spacing in the anterior teeth due to the growth of dental arches.

Making room for permanent dentition
NORMAL SPACING

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11
Q

Primary enamel rods are oriented in which direction in the cervical 1/3 of the crown?

A

OCCLUSALLY

Permanent enamel rods are oriented apically in the cervical 1/3

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12
Q

Primary molars roots differ from permanent molars roots because they are more _______

A

Divergent

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13
Q

Primary molars lack or have a small root _____

A

Trunk

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14
Q

The primary CENTRAL INCISOR has the smallest ___________ crown dimension

A

Faciolingual

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15
Q

The primary and permanent MANDIBULAR CENTRAL INCISOR

A

Most bilaterally symmetrical tooth

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16
Q

Delayed resorption of primary incisors the permanent incisors erupt ?

A

Lingually

“Shark teeth”

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17
Q

The primary central incisor exhibits a prominent lingual and facial _______ ________

A

Cervical ridge (bulge)

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18
Q

PRIMARY canine mesioincisal edge is ______ than the distoincisal edge

A

LONGER

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19
Q

The PRIMARY canine cusp tip is set off towards the _______

A

distal

Gives the longer mesioincisal edge

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20
Q

The 1st PRIMARY MAXILLARY MOLAR crown resembles what permanent tooth?

A

Maxillary premolars

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21
Q

The 1st PRIMARY MOLAR roots resembles what permanent tooth?

A

Maxillary molars

3 roots –> DB, MB, Palatal
** just more divergent**

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22
Q

The cervical ridge on the PRIMARY MAXILLARY 1st MOLAR is most prominent where?

A

Mesial Facial surface

It is NOT the most prominent cervical ridge

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23
Q

Which primary MAXILLARY tooth has the most prominent cervical ridge?
Where is it located?

A

Primary maxillary 1st molar

Located on the MF surface

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24
Q

Which tooth OVERALL has the most prominent cervical ridge?

A

MANDIBULAR first molar

located on the MF surface

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25
Q

Which primary tooth has an oblique ridge?

A

Primary 2nd MAXILLARY Molar – it is the only primary tooth

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26
Q

Which primary tooth has a DL groove, transverse ridge, and an oblique ridge?

A

Primary 2nd MAXILLARY molar

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27
Q

Which primary tooth exhibits a cusp of carabelli?

A

Primary 2nd MAXILLARY molar

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28
Q

What permanent tooth does the primary 2nd MAXILLARY molar resemble?

A

Permanent 1st MAXILLARY molar

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29
Q

What is the LAST tooth to erupt in the primary dentition?

A

Maxillary 2nd molar

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30
Q

Which primary maxillary molar has more cusps

A

Maxillary 2nd molar

1st molar – 3 cusps
2nd molar – 5 cusps

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31
Q

On the MANDIBULAR 1st molar the CEJ is most apically positioned on the ____ _____ surface

A

Mesial 1/3

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32
Q

Which primary tooth has the most prominent transverse ridge?

A

MANDIBULAR 1st molar

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33
Q

The primary mandibular 1st molar displays a ______ triangular fossa

A

Distal

Central fossa is usually displaced towards the distal

Central fossa = distal fossa = main fossa

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34
Q

Which primary tooth does NOT look like any permanent tooth?

A

Primary MANDIBULAR 1st MOLAR

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35
Q

Which primary teeth differ the most from permanent teeth?

A

Primary mandibular 1st molar

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36
Q

What is the highest and sharpest cusp on the primary mandibular 1st molar

A

Mesio-lingual cusp

Part of the prominent transverse ridge

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37
Q

What is the primary function of incisors?

A

Biting, Tearing

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38
Q

The maxillary central incisors have the larges ____________ axial incline

A

Facio-lingual

** Most tilted teeth**

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39
Q

Which tooth has the greatest cervical curvature?

Where is it located?

A

Maxillary central incisors

Located on the mesial

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40
Q

ALWAYS THINK OF MAXILLARY CENTRAL INCISOR – when asked about cervical curvature

A

.

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41
Q

The CEJ dips deeper (greatest cervical curvature) on Maxillary or Mandibular teeth?

A

Maxillary

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42
Q

The CEJ dips deeper (greatest cervical curvature) on Anteriors or posteriors?

A

Anteriors

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43
Q

The CEJ dips deeper on mesial or distal?

A

mesial

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44
Q

What tooth has the GREATEST CEJ dip?

A

Maxillary central incisor

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45
Q

Which ANTERIOR tooth is wider M-D than F-L

A

Maxillary central incisor

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46
Q

Which ANTERIOR tooth has the greatest MD crown dimension?

A

Maxillary central incisor

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47
Q

Maxillary central has the same measurements of what surfaces?

A

M-D
Occlusally- Incisally

** like a square**

48
Q

The contact between the maxillary central incisor and lateral incisor make the facial embrasure ________ than the lingual embrasure

A

Smaller

The contact is more facially

49
Q

The incisal embrasure is ______ between the maxillary central incisors compared to the mx central and lateral

A

Smaller

50
Q

Maxillary LATERAL has the _______ crown variations

A

Most

51
Q

What two teeth exhibit the most deviation in crown morphology? What what exhibits the most?

A 
3rd Molars (most)
MAXILLARY lateral incisors
52
Q

The _______ _______ incisor is most often in abnormal relation and contact with adjacent teeth

A

MAXILLARY lateral

53
Q

What two teeth are most often congenitally missing? Which one is the most?

A 
3rd molars (most)
MAXILLARY lateral incisor
54
Q

The non molar tooth that is most likely to have a distal and mesial pulp horn is _______ _______ ______

A

Maxillary central incisor

55
Q

The non molar tooth that is least likely to have a bifurcated root is ________ _________ _________

A

Maxillary central incisor

56
Q

Which tooth has a DL groove that is an anatomical feature and cuases difficulty during tooth planing?

A

Maxillary LATERAL incisor

57
Q

Which toot is most likely to have lingual pit caries?

A

Maxillary lateral incisor

Due to DL groove

58
Q

The distoincisal angle of the MAXILLARY LATERAL INCISOR has the ________ ________ of all maxillary teeth

A

Greatest convexity

59
Q

Which tooth generally has the most prominent marginal ridges of all ANTERIOR teeth?

A

Maxillary lateral incisor

60
Q

Which tooth has the largest (deepest and most distinct) lingual fossa of all ANTERIOR teeth?

A

Maxillary Lateral incisor

Due to the prominent marginal ridges

61
Q

Which maxillary tooth has the SMALLEST mesio-distal crown width?

A

Maxillary LATERAL incisor

62
Q

Which tooth has the same mesio-distal width as the facial-lingual width?

A

Maxillary LATERAL incisor

Closest of ALL anterior teeth

63
Q

The mesio-distal width of the lateral incisor (maxillary) is smaller than the mesio-distal width of the maxillary central incisor.

A

TRUE

64
Q

The maxillary lateral incisor’s distal contact is the most ______ contact of all incisors.

A

CERVICAL

65
Q

The maxillary lateral incisor’s distal contact is centered both _______ ________ and ________ _______

A

Facial-lingually

Inciso-cervically

66
Q

PNEUMONIC for maxillary anterior Contacts

IJ
JM
JM

A

I Just
Jacked Micheal
Jackson’s Moped

I- incisal 1/3
J - junctional (between incisal 1/3 and middle 1/3)
M - middle 1/3

67
Q

Which tooth may have a larger root length? Mx central vs Mx lateral?

A

Maxillary Lateral

May have the same rooth length or longer

68
Q

Mandibular Centrals

  • Cervical concavity is greater on the _____ surface?
A

Mesial surface

More shallow concavity on the distal surface

69
Q

Mandibular centrals and laterals both have concave areas on the _______ and _______ surfaces of the root

A

Mesial
Distal

Two canals???

70
Q

Which tooth has the SMALLEST crown dimensions?

A

Mandibular centrals

71
Q

Which tooth has the sharpest mesial and distal tooth angles?

A

Mandibular centrals

72
Q

Which tooth has the most symmetrical crown?

A

Mandibular centrals

73
Q

Mandibular centrals have the SAME proximal contact levels on the medial and distal. Where is this contact point located?

A

Incisal 1/3

Same contact points at the incisocervical length

74
Q

Which two teeth only occlude with ONE other tooth?

A

** MAXILLARY ** 3rd molar

Mandibular central incisor

75
Q

What is the first SUCCEDANEOUS tooth to erupt?

A

Permanent MANDIBULAR 1st MOLAR

The permanent 1st molar is NOT succedaneous!!!!!

76
Q

Buccal and lingual embrasures are the same size for the mandibular centrals?

A

True

Symmetrical tooth!

77
Q

The crown of the mandibular lateral incisor tilts ______ in relation to the long axis of the tooth.

A

DISTALLY

May see a portion of the distal marginal ridge when looking at the tooth from the medial aspect.

“Twisted tooth”

78
Q

The mesio-distal width is wider on the mandibular ________ incisor compared to mn ________ incisor

A

Lateral
Central

Opposite of maxillary incisors

79
Q

Which ANTERIOR tooth has the greatest cervical prominence?

A

MAXILLARY canine

80
Q

What tooth has the most vertical axis (straight line axis) when viewed from the proximal?

A

MAXILLARY canine

81
Q

Which tooth has the GREATEST tooth length?

A

Maxillary canine

82
Q

Which tooth has the LONGEST root?

A

Maxillary canine

83
Q

Which ANTERIOR tooth has has the GREATEST facial lingual length?

A

Maxillary canine

When looking from the occlusal surface
maybe due to the largest cervical prominence for anterior teeth

84
Q

Maxillary canine distal contact is located where?

A

The distal contact is CENTERED (IJ JM JM)

85
Q

Which tooth has the potential of contacting anterior teeth as well as posterior teeth simultaneously?

A

Maxillary Canine

Inter cusps with the Mn Canine and Mn 1st premolar

86
Q

Where is the Maxillary canine cusp tip located?

A

Centered or just facial of the long axis

If located more facially – more long aspect of the tooth is visible from the incisal view

87
Q

Which lobe of the maxillary canine includes the cusp tip>

A

Middle facial lobe
So lingual is more visible from incisal view

???????

88
Q

The maxillary canine as a distal bulge

T or F

A

True!

The mesial and distal are asymmetric

89
Q

What is the crown shape of the maxillary canine when looking from the facial?

A

Pentagonal

90
Q

Which tooth has the straightest MESIAL alignment from crown to root?

A

Mandibular canine

91
Q

The mesial surface of the MANDIBULAR canine is almost _______ to the long axis of the tooth

A

parallel

92
Q

Which tooth has the LONGEST CROWN dimension?

A

Mandibular canine

93
Q

Longest tooth –>
Longest root –>
Longest crown –>

A

Mx canine
Mx canine
Mn canine

94
Q

The mandibular canine has a ________ prominent cingulum than the maxillary canine

A

LESS

95
Q

The mandibular canine is ______ mesiodistally than the maxillary canine

A

SMALLER

  • Distal bulge on Maxillary canine (fatter)
  • Straight mesial on Mandibular canine (skinnier)
96
Q

Which ANTERIOR tooth most frequently has a bifurcated root?

A

Mandibular canine

97
Q

What are the roots in a bifurcated mandibular canine?

A

Buccal (facial)

Lingual

98
Q

Which mandibular tooth has the LONGEST root length?

A

Mandibular canine

99
Q

Longest root –>

Longest mandibular root –>

A

Mx canine

Mn canine

100
Q

In cross section of the ROOT of the mandibular canine is shaped like?

A

Irregular oval

101
Q

Cross section of mandibular canine at CEJ

A

Ovoid
Wider mesio-distal at the labial surface
* squished on the lingual

102
Q

Cervical cross section of the mandibular canine is FLATTENED in a _______ _______ direction (more apical)

A

mesio-distal

103
Q

Contact areas of mandibular canine are located?

A

More incisally

Mn incisor contact is the in the apical 1/3 of each tooth (high contacts)

104
Q

The mandibular canine has a continuous convex facial surface from incisal to apical end

A

True

Convexity when viewed from the proximal

105
Q

The mandibular canine makes a _____ shaped from incisal tip to root tip

A

C

106
Q

Mandibular canine incisal edge is located more ______ to the long axis

A

Lingual

Opposite of maxillary canine

107
Q

Canines:
Incisal edge located more
* Lingual to long axis –>
* Labial to long axis –>

A

Mandibular canine

Maxillary canine

108
Q

What tooth has most pronounced MESIAL developmental marginal groove?

A

Maxillary first premolar

109
Q

What surface of the Maxillary first premolar has a concavity? Why is this important?

What is that concavity called?

A

Mesial surface (where the mesial developmental groove extends)

Difficult to adapt a tofflemier band

Mesial developmental depression

110
Q

What shape is the MAXILLARY first premolar when a cross section is taken of the cervical region?

A

KIDNEY bean

Due to the mesial concavity

111
Q

What shape is the pulp chamber floor of the MAXILLARY first premolar?

A

Kidney bean

112
Q

What non molar tooth can have three roots?

A

Maxillary First premolar (6% can have three canals)

Most of the time it is bifurcated but can be trifurcated (bifurcated 70-80% of the time)

113
Q

The facial cusp on a MAXILLARY first premolar is located more __________

A

Distally

Elongating the mesio-facial cusp ridge
** unique for permanent teeth

114
Q

What is the order for PERMANENT maxillary teeth cusp ridge lengths starting with the mesial Canine and ending with the distal of second premolar?

A

Short -> Long -> Long -> Short -> Short-> Long

115
Q

What two teeth have a longer mesio-facial cusp ridge?

A

Permanent Maxillary 1st premolar

PRIMARY maxillary canine

116
Q

Which premolar has the STEEPEST cusp inclines?

A

Maxillary first premolar

117
Q

The maxillary first and second premolar LINGUAL cusps are offset to the ______?

A

Mesial

  • The facial cusp of the first premolar is offset to the distal *

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