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Dental Anatomy > Final > Flashcards

Final Flashcards

1
Q

** the number of point angles on posterior teeth is

A

four

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2
Q

*** the correct name for the anatomic feature labeled on the attached drawing is (its a max 1st PM)

A

the distal marginal ridge

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3
Q

** the ridge that comprises the lingual segment of the transverse ridge of the max first PM is correctly named

A

the lingual triangular cusp ridge

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4
Q

**the ridge that separates the 2 lingual fossae on a max canine is correctly named

A

the lingual ridge

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5
Q

**the mesial cusp ridge of the mandibular canine is shorter than the distal cusp ridge of the same tooth

A

TRUE

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6
Q

**the facial cervical line of all mandibular incisors is positioned

A

incisal to the lingual cervical line

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7
Q

**which of the following features would you expect to find on a max second PM

A

a transverse ridge
a mesial triangular fossa
a central groove
2 distal cusp ridges

(a,b,c,e)

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8
Q

**identify the mesial view of the max canine in the image attached

A

it is choice A

look at CEJ and that it is thick tooth. well developed fossa. but has shorter crown than the mand canine (weird***)

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9
Q

** in comparing lingual surfaces of permanent maxillary incisors, the permanent max lateral incisor would characteristically have more

A

a more pronounced lingual fossa
more prominent marginal ridges
more convex mesial and distal proximal surfaces

(a,b,d)

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10
Q

**with the exception of 3rd molars, when is the adult dentition typically complete?

A

14-15 years

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11
Q

**a tooth that frequently displays a mesially curved apex is the

A

mandibular canine

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12
Q

**identify the feature indicated by the arrow in the attached image

(its the perio ligament pic)

A

more than one option is correct (E)

it is interradicular fibers and periodontal ligament fibers

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13
Q

** which of the following teeth is most likely to have a bifurcated root?

A

mandibular canine

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14
Q

**the mandibular permanent lateral incisor usually erupts between the ages of

A

7 and 8 years old

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15
Q

** the mesial marginal ridge of most posterior teeth is located more occlusally than is the distal marginal ridge. which tooth is most likely to be the exception

A

mandibular 1st PM

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16
Q

** when viewed labially, contact area of anterior teeth are incisal to the middle third of the tooth. an EXCEPTION to this rule is the

A

distal contact of the max canine

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17
Q

**in distinguishing between a max and mand canine, which of the following features would be of aid?

A

ALL OF THEM

-the mesial contact areas of mandibular canines are located more incisally
-the cingulum of mandibular canines is less pronounced.
-mandibular canines appear longer and slimmer.

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18
Q

**a common trait common with ALL mand incisors is that they are wider _____ than _____

A

wider -> labiolingually
than -> mesiodistally

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19
Q

**deciduous PM number

A

ZERO

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20
Q

** facial aspect of all teeth resembles which geometric form?

A

trapezoid with the longer uneven side toward the occlusal or incisal surface

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21
Q

**the primary cusp triangle on the occlusal surface of max molars is formed by the

A

mesiolingual cusp
mesiobuccal cusp
distobuccal cusp

(b,d,e)

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22
Q

**tooth occasionally exhibits a lingual groove which extends from the enamel onto the cemental area of the root. This is most likely the permanent:

A

max lateral incisor

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23
Q

**The largest and best developed cusp of the mandibular primary first molar is:

A

the mesiolingual cusp

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24
Q

**T/F: the mesial of tooth 8 contacts the mesial of tooth 9

A

TRUE

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25
Q

**the dental formula for the permanent human dentition is which of the following:

A

I2/2 C1/1 P2/2 M3/3 =16

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26
Q

anterior teeth:

line angles:
point angles:

A

line angles: 6
point angles: 4

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27
Q

posterior teeth:

line angles:
point angles:

A

line angles: 8
point angles: 4

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28
Q

mandibular 1st premolars resemble which tooth

A

canine and 2nd PM

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29
Q

mandibular 1st PM buccal aspect:

mesial cusp ridge is ____ than the distal cusp ridge

A

SHORTER

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30
Q

mandibular 1st PM buccal aspect:

contant areas are

A

board and near the same level mesially and distally

just more than halfway from CEJ to the cusp tip (within middle third)

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31
Q

mandibular 1st PM buccal aspect:

which shape is crown

A

trapezoid

CEJ is relatively straight

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32
Q

mandibular 1st PM buccal aspect:

cusp tip is pointed and slightly __________

A

mesial to a center line

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33
Q

mandibular 1st PM lingual aspect:

crown significance

A

Crown tapers toward the lingual and a significant portion of the mesial and distal surfaces are visible from this aspect

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34
Q

mandibular 1st PM lingual aspect:

lingual cusp significance

A

Lingual cusp is always small, little more than a cingulum, and the occlusal surface is sloped toward the lingual down to the lingual cusp

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35
Q

mandibular 1st PM lingual aspect:

T/F: cannot see most of occlusal surface from this view

A

FALSE!!! CAN SEE MOST OF THE TABLE

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36
Q

mandibular 1st PM lingual aspect:

which lobe makes up most of crown

A

the middle buccal lobe -> gives it appearance like mandibular canine

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37
Q

mandibular 1st PM lingual aspect:
KEY FEATURES

A

mesiolingual developmental groove, which lies between the mesiobuccal lobe and the lingual lobe and extends onto the occlusal surface

separates MMR from the mesial slope of the lingual cusp

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38
Q

mandibular 1st PM lingual aspect:

root significance

A

significantly narrower on the lingual side

can have mesial curve but usually distal

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39
Q

mandibular 1st PM mesial aspect:

crown looks like what shape

A

rhombodial

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40
Q

what is a characteristic all ALL mand post teeth shape wise

A

crown is rhomboidal shape from mesial view

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41
Q

mandibular 1st PM mesial aspect:

cusp tips significance

A

Tip of the buccal cusp is nearly centered over the root

Lingual cusp tip is in line with the lingual border of the root and the lingual outline of the crown is lingual to the outline of the root presenting an overhang of the crown above the root trunk

**Differs from all maxillary posterior teeth where the cusp tips are well within the confines of the root trunk

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42
Q

characteristic of mandibular posterior teeth crest of curvature wise

A

The crest of curvature is in the cervical 3rd near the junction of the cervical and middle 3rds

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43
Q

on mand 1st PM mesial view, what is a key thing you are able to see

A

the mesiolingual developmental groove on the crown

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44
Q

which tooth has snake eyes

A

mand 1st PM

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45
Q

mand 1st PM occlusal aspect:

shape

A

commonly a diamond shape

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46
Q

mand 1st PM occlusal aspect:

key features

A

-Middle buccal lobe makes up major bulk of the crown
-The buccal ridge is prominent
-Mesiobuccal and distobuccal ridges are prominent
-Curvatures representing the M&D contact areas are broad, with the distal broader of the two
-The crown converges sharply to the lingual
-The marginal ridges are prominent
-The lingual cusp is small
-The buccal triangular ridge is large and dominant on the occlusal view with the lingual triangular ridge small

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47
Q

mand 1st PM occlusal aspect:

KEY THING TO LOOK FOR IS

A

the snakeyes! –>

mesial developmental groove
distal developmental pit/ may also have groove

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48
Q

mand 1st PM: what is an exception with this tooth

A

mesial marginal ridge is more cervical (different from other teeth)

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49
Q

is the first mand PM bigger or the 2nd?

A

mand 2nd PM is larger

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50
Q

mand 2 PM cusp significance

A

can have 2 or 3!
2: F and L
3: F, ML, DL **more common

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51
Q

does the mand 2 PM have shorter or longer buccal cusp than the mand 1 PM

A

SHORTER buccal cusp

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52
Q

contact areas for mand 2nd PM

A

middle 3rd

53
Q

HOC for mand premolars buccal aspect

A

all at the junction of the occlusal and middle thirds

54
Q

does 2nd or 1st mand PM have more pointed cusp tip with longer cusp ridge

A

1st premolar has more pointed cusp tip with longer cusp ridges

2nd has more flat cusp ridges than 1st

55
Q

mand 2 PM lingual aspect:

on the 3 cusp variety, we can see a

A

small lingual groove

not on the 2 cusp variety

56
Q

what is the only tooth with the MMR more cervically located than the DMR

A

the mand 1st PM

57
Q

what teeth show a lingual tilt

A

mand post teeth

**1 PM tilts more than 2 PM

58
Q

HOC F and L for mand 1 PM

A

F: cervical third
L: middle third

59
Q

HOC F and L for mand 2 PM

A

F: middle third
L: middle third

60
Q

mand 2 PM 3 cusp variety -> rank cusp sizes largest to smallest

A

buccal > ML > DL

61
Q

mand 2 PM 3 cusp variety

each cusp has well formed

A

triangular ridges

forms a Y shape

62
Q

mand 2 PM 2 cusp variety

what are the two letters the occlusal surface can make

A

U or H

***3 cusp -> Y shape

63
Q

what is the largest and strongest mand teeth

A

mand molars

64
Q

crown shape of mand molars

A

quadrilateral (MD>FL)

65
Q

mand 1st molar -> how many cusps and rank largest to smallest

A

5

ML > MB > DL > DB > D

66
Q

mand 1 molar roots:

A

2

M: curves distal. 2 canals
D: straight or distally curved. one canal

67
Q

HOC M/D for mand 1 molar

A

M: junction of occlusal and middle third
D: middle third

68
Q

crown shape buccal of mand 1 molar

A

trapezoidal shape

69
Q

HOC B/L for mand 1 molar

A

B: cervical third
L: middle third

70
Q

crown shape mesial of mand 1 molar

A

rhomboid shape

lingual tilt of crown bc its a mand post tooth!

71
Q

T/F: the rule is D cusp ridge is lower than M from D/M view

A

true

72
Q

which tooth has a distal taper

A

mand 1st molar AND 2nd molar

wider M then gets LESS wide D

73
Q

mand 1 molar: which developmental grooves can be seen from buccal aspect

A

MB and DB developmental grooves

74
Q

T/F: from the M view on a mand 1 M, you can see ALL 5 cusps and 2 roots

A

FALSE! the DISTAL view you can

75
Q

largest cusp on a mand 1 molar

A

ML

3 buccal cusps are pretty flat
2 lingual are sharper

76
Q

which tooth has a cruciform shape on the O surface

A

mand 2 molars

77
Q

how many cusps on a mand 2 molar and rank largest to smallest

A

4 cusps
ML>DL>MB>DB

78
Q

mand 2 molar roots significance

A

they arent as spread out as the 1st. we are running out of room back there so theyre closer together

79
Q

HOC of mand 2 molar M/D

A

M: junction of occlusal and middle third
D: middle third

80
Q

T/F: lingual groove is less prominent on the 2 mand molar than on 1 mand molar

A

TRUE

81
Q

HOC of mand 2 molar B/L

A

B: cervical third
L: middle third

82
Q

how many cusps can you see from M view on a mand 2nd molar

A

3! ML, MB, DB

83
Q

which side (D/M) on a mand 2 molar can you see all 4 cusps and 2 roots

A

DISTAL!

(same with the 1 mand molar!)

84
Q

with teeth are responsible for these functions:

-Mastication off food
-Maintaining vertical dimension of the face
-Prevent protruding chin and aged appearance
-Maintaining the continuity of the arches
-Proper alignment
-Esthetics
-Keep cheeks normally full

A

MOLARS

85
Q

T/F: permanent molars are not succedaneous teeth – it has no predecessor in the arch

A

TRUE

86
Q

which category of teeth are widest than tall

A

molars

87
Q

which category of teeth have crown heights shorter than other teeth

A

molars

88
Q

T/F: all buccal surfaces are wider MD than the lingual surface

A

FALSE

EXCEPTION: some maxillary 1st molars have a wider lingual surface

89
Q

contact areas for molars in general

M/D

A

M: at or near the junction of the occlusal and middle thirds
D: middle third

90
Q

salient features of max 1st molars

A

oblique ridge
MD wider greater on L
cusp of Carabelli
3 roots

91
Q

T/F palatal root is usually longer than buccal roots on max molars

A

true

92
Q

rank cusp sizes of max 1 molar

A

ML > MB > DL > DB > cusp of c

93
Q

what forms the max 1 molar primary cusp triangle

A

the tips of the 3 largest cusps ( ML, MB, DB cusp tips)

**pic on slide 18 on perm max molars

94
Q

what forms the transverse ridge on max 1 molar

A

triangular ridges meet in the central aspect forming a transverse ridge

**The transverse ridge from the distobuccal cusp to the mesiolingual cusp crosses the tooth obliquely, and is called the oblique ridge.

95
Q

what is a key difference b/w 1 and 2 max molars

A

2nd molar has NO cusp of C and SMALLER DL cusp

overall smaller crown than 1 molar and roots are closer together on 2nd

96
Q

what does the oblique ridge consist of on a max 1 molar

A

distal ridge of the ML cusp and the triangular ridge of the DF cusp

97
Q

when does exfoliation take place in a kid

A

b/w 7th and 12 years

98
Q

how many primary teeth and how many of each

A

20 total

2 I, 1 C, 2 M in EACH QUAD

99
Q

what which age is primary dent complete

A

about 2.5 years

100
Q

Do primary premolars exist

A

NO!!

101
Q

the crowns of primary max 1 molars resemble what in the permanent

A

permanent PM

102
Q

which primary tooth has a crown unlike any permanent tooth

A

crown of a primary mand 1st molar

then he also says primary mand and max 1st molars differ from any teeth in the permanent set when the crowns are compared

103
Q

letters from primary mand and max arches

A

max: A-J
Mand: K-T

104
Q

The crowns of primary anterior teeth are_____ mesiodistally in comparison with their crown length than are the permanent teeth.

A

WIDER

105
Q

The roots of primary anterior teeth are narrower and ______ comparatively

A

longer

106
Q

The roots of the primary molars accordingly are______ and more slender and flare more, extending out beyond projected outlines of the crowns. This flare allows more room between the roots for the development of permanent tooth crowns

A

longer

107
Q

The cervical ridges of enamel of the anterior teeth are______ prominent in primary. These bulges must be considered seriously when they are involved in any operative procedure

A

more

108
Q

The crowns and roots of primary molars at their cervical portions are _______________

A

more slender mesiodistally

109
Q

The cervical ridges ______ on the primary molars are much more pronounced, especially on the maxillary and mandibular first molars

A

buccally

110
Q

The buccal and lingual surfaces of primary molars are _____ above the cervical curvatures than those of permanent molars, which narrows the occlusal surfaces.

A

flatter

**good bc little kids dont have great hygiene

111
Q

The primary teeth are usually_____ pigmented and are ______ in appearance than the permanent teeth.

A

LESS

WHITER

112
Q

The enamel cap of primary molars is ______ and has a more consistent depth.

A

thinner

113
Q

max 1st molar occlusal aspect — a ket difference between max and mand is (primary)

A

Sometimes the primary maxillary first molar has a well-defined triangular ridge connecting the mesiolingual cusp with the distobuccal cusp. When well developed, it is called the oblique ridge.

114
Q

The ___________does not resemble any other teeth, deciduous or permanent

A

Primary mandibular first molar

ON EXAM FOR SURE

115
Q

ugly duckling phase

A

6-12 years

116
Q

T/F not all permanent teeth replace a primary

A

TRUE!

117
Q

T/F all succedaneous teeth are permanent but not all permanent teeth are succedaneous

A

TRUE

succedaneous teeth = permanent teeth that replace the primary teeth

118
Q

line angles

A

formed by junction of 2 surfaces

119
Q

point angles

A

formed by junction of 3 surfaces

120
Q

cusp

A

an elevation or mound on the coronal portion of a tooth making up a divisional part of occlusal surface

121
Q

tubercle

A

small elevation on the crown produced by excessive formation of enamel.

122
Q

cingulum

A

L lobe of anterior teeth

123
Q

marginal ridges

A

rounded borders of enamel that form the mesial and distal margins of the occlusal surface of posterior teeth and the lingual surface of anterior teeth

124
Q

triangular ridges

A

descend from tips of cusps to central part of occlusal surface in premolars and molars

125
Q

transverse ridges

A

formed by joining of buccal and lingual triangular ridges.

126
Q

oblique ridge

A

Formed by joining of buccal and lingual triangular ridges crossing obliquely over the occlusal surfaces of maxillary molars from distal buccal to mesial lingual

127
Q

fossa

A

irreg depression or concavity

128
Q

triangular fossa

A

on occlusal surface just inside marginal ridges on molars and premolars. Sometimes found on lingual surface

129
Q

sulcus/grooves

A

-Sulcus: long depression in surface of tooth between ridges and cusps, the inclines of which meet at an angle
* Developmental Groove: Shallow groove or line between primary parts of the crown or root.
* Supplemental groove: branch off of developmental grooves – do not mark a junction of primary parts

Dental Anatomy (5 decks)

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