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NBDE part 1 > Dental Anatomy > Flashcards

Dental Anatomy Flashcards

1
Q

the central incisor has … mamelons and developed from …. lobes

A

3

4

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2
Q

which tooth has the greatest axial inclination of all incisors

A

central maxillary

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3
Q

is the central max incisor greater MD or FL

A

MD

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4
Q

is the incisal edge centered over root axis for the central max incisor?

A

yes

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5
Q

most widely varied anterior tooth?

most widely varied tooth overall?

A

max lateral incisor

3rd molar

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6
Q

which tooth is most likely to be missing?

A

max lateral incisor

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7
Q

the maxillary lateral incisors has a …. that extends from enamel onto cementum and complicates …

A

distolingual groove

root laning

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8
Q

this tooth is least likely to be lost due to decay or perio

A

maxillary canine

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9
Q

longest of all permanent teeth?

A

maxillary canine

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10
Q

… has the most nearly vertical long axis of all permanent teeth

A

maxillary canine

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11
Q

the facial and lingual outline of this tooth is pentagonal

A

maxillary canine

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12
Q

the cusp tip of the maxillary canine is offset to … and … from center

A

mesial

facial

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13
Q

the mesial surface of the max canine is … and the distal surface is more …

A

straighter

convex

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14
Q

is the max canine greater FL or MD

A

FL

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15
Q

only premolar with bifurcated root?

A

1st max premolar

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16
Q

longest maxillary posterior crown cervico-incisally?

A

1st max premolar

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17
Q

1st max PM has a prominent…. and prominent …

A

ML groove

mesial concavity

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18
Q

which is longer in a max 1st PM, mesial buccal cusp ridge or distal?

A

mesial

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19
Q

the lingual cusp of the max 1st PM is shorter than buccal cusp and is offset to the

A

mesial

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20
Q

axial inclination of max 1st PM?

A

nearly vertical

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21
Q

is the max 1st PM greater FL or MD?

A

FL

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22
Q

in the max 2nd PM, the lingual and buccal cusps are nearly…

A

the same height

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23
Q

which is longer on the max 2nd PM, the mesial buccal ridge or distal?

A

distal

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24
Q

describe the central groove of the max 2nd PM compared to the max 1st PM

A

shorter with more supplemental grooves

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25
Q

the lingual cusp of the max 2nd PM is inclined toward the

A

mesial

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26
Q

is the 2nd max PM wider FL or MD

A

FL

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27
Q

largest maxillary tooth?

A

1st molar

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28
Q

which is the largest cusp in the 1st max molar?

A

ML cusp which forms an oblique ridge

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29
Q

the max 1st molar has a prominent …. which is a likely spot for caries and is the only tooth that has a cusp of ..

A

lingual groove

carabelli

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30
Q

shape of the max 1st molar?

A

rhomboid

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31
Q

the max 1st molar has a prominent root trunk concavity on the …

A

distal

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32
Q

extraction of which tooth is most likely to result in a maxillary sinus exposure

A

max 1st molar

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33
Q

cusps in order from largest to smallest for the maxillary molars

A

ML>MB>DB>DL

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34
Q

the maxillary molars both have a trifurcated root but which one has a longer trunk?

A

2nd max molar

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35
Q

most widely varied anatomy?

A

maxillary 3rd molars

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36
Q

the maxillary 3rd molar only occludes with

A

1 other tooth (mand 3rd molar)

mand central incisor is only other tooth that has only 1 antagonist

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37
Q

what shape is most common for max 3rd molar

A

heart shape (3 cusps)

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38
Q

shortest of all perm teeth?

A

max 3rd molar

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39
Q

20% of the population has 1 or more congenitally missing …

A

3rd molar (mand or max)

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40
Q

in the max 3rd molar, it is easy to extract because the roots are usually … and …

A

fused together

curved to the distal

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41
Q

which is the smallest and most symmetrical tooth in the mouth?

A

mand central incisor

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42
Q

the mand cent incisor is wider FL or MD?

A

FL

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43
Q

do mand central incisors have root depressions on the distal or mesial?

A

both

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44
Q

how do you identify a mand lateral incisor

A

incisal edge twisted towards distolingual

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45
Q

longest crown of any tooth?

A

mand canine

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46
Q

longest mand tooth?

A

mand canine

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47
Q

for the mand canine, the mesial cusp ridge is almost … and … than the distal cusp ridge. The cusp tip is displaced towards…

A

horizontal

shorter

mesial

48
Q

the cingulum of the mand canine is displaced toward the

A

distal

49
Q

the cusp tip of the mand canine is displaced … or ..

A

lingually or centered

50
Q

which tooth has an undeveloped lingual cusp that is 2/3 the height of the buccal cusp and is non-functional, similar to cingulum of canine

A

mand 1st PM

51
Q

the mand 1st PM has a prominent

A

mesiolingual developmental groove

52
Q

the mand 1st PM has a prominent triangular ridge separating …

A

mesial and distal pits with NO central groove

53
Q

which tooth usually needs a snake eyes prep

A

mand 1st PM

54
Q

which marginal ridge is located more cervically on the mand 1st PM

A

mesial (be able to identify this on a pic)

55
Q

which tooth has an occlusal table is lingually inclined at a 45 degree angle from root – greatest in the mandible

A

mand 1st PM

56
Q

only PM with 2 lingual cusps?

A

mand 2nd PM

57
Q

which tooth tends to have a U or H shaped prep?

A

2nd mand PM

58
Q

which tooth has the greatest MD dimension of any tooth?

A

mand 1st molar

59
Q

3 teeth that are greater MD than FL

A

1st mand molar
max central
max lateral

60
Q

root apices of mand 1st molars lie below the …

A

mylohyoid line

61
Q

which tooth is most symmetrical of all the molars

A

mand 2nd molar

62
Q

in primary teeth, enamel rods extend…

A

occlusally from the DEJ

63
Q

where are the primate spaces located?

A

max- btn lateral and canine

mand- btn canine and 1st molar

64
Q

primary max central is the only incisor (prim or perm) that is wider … than …

A

MD

incisocervically

65
Q

the primary max central has prominent…

A

facial and lingual cervical ridges

66
Q

the cusp tip of the primary max canine is toward the ….

A

distal

67
Q

the mesial cusp ridge of the primary max canine is …. than the distal cusp ridge ( all other canines are opposite)

A

longer

68
Q

a primary max 1st molar will have a prominent … bulge

A

MB

69
Q

the primary mand 1st molar’s … cusp is the longest and largest bu the …. cusp is the sharpest

A

MB

ML

70
Q

the primary mand 2nd molar closely resembles the perm…

A

1st mand molar

71
Q

which teeth are not succedaneous?

A

permanent molars

72
Q

which is the first succedaneous tooth to erupt

A

mand central

73
Q

all 20 primary teeth begin to calcify between …. and … in utero

A

4-6 months

74
Q

calcification is complete for all primary teeth by …

A

12 months old

75
Q

root of a primary tooth is fully formed approx. … after eruption

A

1 year

76
Q

root of a permanent tooth fully develops …. after eruption

A

2-3 years

77
Q

for permanent 1st molars, calcification begins at… and calcification is complete at …

A

birth

3 years

78
Q

all succedaneous teeth have begun to calcify by…

A

2.5 years

79
Q

by age …. all but the 3rd molars have begun to calcifu

A

3

80
Q

by age …. the permanent canines have begun to calcify

A

1

81
Q

which is the last succedaneous tooth to erupt by age 12?

A

max canine

82
Q

4 functions of proximal contacts

A

prevent food impaction
form embrassures
protect periodontium
stabilize dental arch

83
Q

as a general rule, as you move posteriorly, contacts are located more …. but contacts are never in the … third

A

cervically

cervical

84
Q

the contacts of the mand 2nd PM, 1st molar and 2nd molar are aligned in…

A

a straight line

85
Q

contacts are often …. to the buccolingual midline except anterior which are …. faciolingually

A

facial

centered

86
Q

largest incisal embrassure is located…

A

btn max lateral and canine

but overall greatest occlusal embrassure is max canine and 1st PM

87
Q

the facial height of contour on all teeth is located in the ….

A

cervical third

88
Q

the lingual height of contour is located in the …. third for all anterior teeth and the … third for all posterior teeth

A

cervical

middle

89
Q

maxillary teeth contacts

A 
IJ
JM
JM
MM
MM
MM
MM
M
90
Q

mandibular teeth contacts

A 
II
II
IM
MM
MM
MM
MM
M
91
Q

the TMJ is a … joint and a … joint

A

ginglymoarthrodial (hinge and sliding)

synovial

92
Q

the mandibular condyle is covered with dense… NOT … as in other joints

A

avascular fibrous connective tissue

hyaline cartilage

93
Q

the articular fossa of the temporal bone is just anterior to the …. and the posterior roof is very thin

A

auditory canal

94
Q

the articular fossa of the temporal bone can also be called the … or … fossa

A

glenoid

mandibular

95
Q

the …. is the convex bony prominence anterior to the fossa and it influences anterior guidance of dentition

A

articular eminence

96
Q

the articular eminence is considered to be the … portion of the joint and is composed of …. able to sustain heavy forces and it is covered in …

A

functional

thick dense bone

dense avascular fibrous connective tissue

97
Q

the articular disc is … in the middle, …. in the anterior and … in the posterior

A

thinnest

thicker

thickest

98
Q

what is the gold standard for imaging of the TMJ

A

MRI

99
Q

the … ligaments attach the disc to the head of the condyle on medial and lateral surfaces. They allow the disc to move like a bucket handle as the mandible moves

A

collateral

100
Q

the … ligament surrounds and encloses the TMJ, it attaches from neck of condyle to temporal bone above fossa. It resists separation or dislocation of the condyle from the temporal bone

A

capsular

101
Q

the capsular ligament retains and secretes… and it is well …. so it gives feedback on joint position and movement

A

synovial fluid

innervated

102
Q

the … ligament is the main stabilizing ligament of the TMJ, it prevents posterior or inferior displacement and limits the extent of rotational opening of the jaw

A

temporomandibular

103
Q

the temporomandibular ligament extends from the …. to …

A

articular eminence

posterior condyle

104
Q

the … ligament initiates translation of the condyle down the articular eminence

A

temporomandibular

105
Q

the … ligament limits posterior movement of the condyle protecting retrodiscal tissue

A

temporomandibular

106
Q

during extreme trauma, the neck of the condyle will … before the condyle is forced into the retrodiscal tissue or middle cranial fossa

A

fracture

107
Q

which ligament is most likely to be damaged during injection during IANB

A

sphenomandibular

108
Q

the …. ligament attaches from sphenoid bone to lingula of mandible and limits excess opening of the mandible

A

sphenomandibular

109
Q

the … ligament attaches from the styloid process to angle of mandible and prevents excessive protrusion of the mandible

A

stylomandibular

110
Q

what innervates the TMJ?

A

auriculotemporal branch of V3

111
Q

which MOM are elevator muscles?

A

temporalis
medial pterygoid
masseter

112
Q

the lateral pterygoid does NOT … the mandible. it effects left and right working movements and protrusion

A

elevate

113
Q

when the lateral pterygoids are working together, the mandible will …

A

protrude

114
Q

when there is an injury on one side affecting the lateral pterygoid, the jaw will move toward … during protrusion

A

the affected side

115
Q

the …. is a bodily lateral shift of the mandible in the direction of the working condyle and occurs during the earliest stages of lateral movement/translation

A

bennet movement

116
Q

which teeth contact only one other tooth

A

max 3rd molar

mand central

NBDE part 1 (9 decks)

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