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Dental Development and Anatomy > Molars > Flashcards

Molars Flashcards

1
Q

Molars

_____ developmental lobes

_____ - 5 lobes

A

4-5

mandibular M1

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2
Q 
Molars
Basic Occlusal Anatomy: 
Cusps
\_\_\_\_\_ 
B-L Ridges 
\_\_\_\_\_ 
Fossae
A

MD ridges

Grooves

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3
Q

Maxillary First Molar

Eruption: _____

A

6 years

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4
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension*
! The outline form of the crown is a _____

A

greater

trapezoid

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5
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The tips of all the major cusps are visible except the _____ cusp tip
! The _____ cusp is visible between the MB and DB cusp

A

DL

ML

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6
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The MB cusp is approximately the same _____ as the DB cusp.
“ Sometimes it is slightly _____ than the DB cusp
! The MB cusp is _____ than the DB cusp

A

height
higher
wider

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7
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The buccal groove extends cervically to the _____ third of the crown surface and occasionally there may be a _____ where the groove terminates

A

middle

pit

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8
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third near the O/C center

A

occlusal
middle
middle

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9
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! There are _____ roots that are nearly the same length
“ _____, _____, and _____
“ the _____ root is the
largest
! The MB root is slightly _____ than the DB root

A

three
MB, DB, P
palatal
longer

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10
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Buccal View
! Root trunk
! _____ – where the root trunk separates into individual roots
! The _____ furcation separates the MB and DB roots

A

furcation

buccal

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11
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is _____ from the proximal view

A

greater

trapezoidal

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12
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! Major cusps visible from a mesial view are the _____ and _____
And when present:
! 5th Cusp:
“ _____ is visible if present (_____ of the time)

A

MB
ML
cusp of carabelli
70%

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13
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The B height of contour is located in the _____ third of the crown
! The L height of contour is located in the _____ third of the crown
! When teeth have a large Cusp of Carabelli, the lingual height of contour is located in the _____ 1/3 of this cusp

A

cervical
middle
occlusal

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14
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The MB root is wide _____
! The DB root is hidden by the MB root from the _____ view
! The buccal cusp is about _____ longer than the lingual cusp

A

buccolingually
mesial
1 mm

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15
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The palatal root diverges (flares) to the _____
! The palatal root is described as “_____” shaped

A

lingual

banana

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16
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Mesial View
! The mesial furcation
separates the _____ root and the _____ root

A

MB

P

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17
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ crown dimension is greater than the _____ crown dimension**
! The crown is wider BL in the _____ half of the crown
**True for ALL _____

A

BL
MD
mesial
max molars

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18
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View

! The _____ M-D crown dimension is greater or equal to the _____ M-D crown dimension

A

lingual

buccal

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19
Q 
UNIQUE CHARACTERISTICS
Maxillary First Molar –
Occlusal View
!  The Cusp of Carabelli may be:
" distinctly \_\_\_\_\_ 
" \_\_\_\_\_ visible 
" not present at all
# Missing \_\_\_\_\_ of the time
" If present – will be on both \_\_\_\_\_ and \_\_\_\_\_ sides
A 
formed
barely
30%
right
left
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20
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The outline of the occlusal surface resembles
“ a _____
“ a _____

A

parallelogram

rhomboid

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21
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The M proximal contact is located _____ to the center of the crown
! The D proximal contact is located at the _____ of the crown

A

B

center

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22
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! Cusp size: (from largest to smallest):
“ _____
“ _____
“ _____
“ _____
“ _____

A 
ML
MB
DB
DL
cusp of carabelli
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23
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The large ML cusp has _____ triangular ridges
“ _____
“ _____

A

two
mesial
distal

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24
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The M triangular ridge of the _____ cusp meets the triangular ridge of the _____ cusp to form a _____ ridge
! The distal ridge of the _____ cusp and the triangular ridge of the _____ cusp form the _____ ridge

A 
ML
MB
transverse
ML
DB
oblique
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25
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! The _____ crosses the occlusal surface in a _____ direction***
! Crossed by a developmental groove BUT NOT as deeply as the rest of the _____
! The oblique ridge is at about the same height as the _____ ridges

A

oblique ridge
diagonal
central groove
marginal ridges

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26
Q

UNIQUE CHARACTERISTICS
Maxillary First Molar –
Occlusal View
! There is a unique groove that separates the M and D triangular ridges of the ML cusp
“ Called a “_____”
! There is a distinct triangular arrangement of the _____, _____, and _____ cusps
“ Termed a _____

A

stuart groove
MB, DB, ML
trigone

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27
Q

UNIQUE CHARACTERISTICS Maxillary First Molar – Occlusal View
! There are 5 major grooves present:
“ _____
“ _____
“ Distolingual or Distal oblique
“ Lingual
“ _____ of the oblique ridge (not as _____ as the other grooves)

A

central
facial
transverse
deep

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28
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Distal View
! The D marginal ridge is located more _____ than the M marginal ridge
! The distal furcation separates the _____ and _____ roots
“ Located closer to the _____ than the other furcations
“ Root trunk _____ from this view

A 
cervical
DB
P
root tips
longer
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29
Q

UNIQUE CHARACTERISTICS Maxillary First Molar–Distal View
! The DB root is _____ than the MB root and not as wide _____.
! The DB root is the _____, shortest, and _____ root
! The DB root apex is more _____ than the MB root apex

A 
shorter
B-L
smallest
weakest
pointed
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30
Q

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! Little if any of the proximal surfaces are visible from a _____ view
“ the lingual half of the crown usually is equal to or greater _____ than the buccal half of the crown
“ No _____ taper

A

lingual
MD
lingual

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31
Q

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The ML cusp is usually the _____ and _____ cusp on the first molar
! The DL cusp is _____ and _____ than the ML cusp

A

largest
longest
shorter
narrower

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32
Q

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The Cusp of Carabelli is on the lingual surface of the _____ cusp.
! If present, it is located on _____.
! The Cusp of Carabelli is located about _____ apical to the ML cusp tip

A

ML
both sides of the jaw
2mm

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33
Q

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The DL groove originates on the _____ and goes onto the lingual surface becoming the _____.
! The buccal roots are visible from a _____ view due to their wide M-D spread

A

occlusal surface
lingual groove
lingual

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34
Q

UNIQUE CHARACTERISTICS Maxillary First Molar– Lingual View
! The _____ root is the longest, largest, and strongest of the 3 first molar roots
! The P root is wider _____ than B-L

A

P

M-D

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35
Q

Maxillary Second Molar

Eruption: _____

A

12-13 years

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36
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is a _____

A

greater

trapezoid

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37
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The _____ cusp is higher than the _____ cusp.
! The _____ cusp is wider than the _____ cusp

A

MB
DB
MB
DB

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38
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View

! The B groove extends onto the B surface, but NOT to the _____ third of the crown surface like the _____

A

middle

first molar

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39
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third
“ It is more _____ than the mesial contact

A

occlusal
middle
middle
cervical

40
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! There are _____ roots that are nearly the same length
“ _____, _____, and _____
“ The P root is the _____
! The _____ and _____ roots are about the same length
“ Less _____ apart M-D

A 
three
MB, DB, P
largest
MB
DB
spread
41
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Buccal View
! The buccal roots are nearly _____, not very curved,
“ and have a _____ inclination
! The root trunk is longer than the _____
“_____ furcation more apical

A

parallel
distal
first molar
buccal

42
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is _____
! There is no _____


A

greater
trapezoidal
cusp of carabelli

43
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The B height of contour is located in the _____ third of the crown
! The L height of contour is located in the _____ third of the crown

A

cervical

middle

44
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View
! The _____ dimension of the MB root is larger than the DB root
“ The _____ root is hidden by the _____ root
! The MB cusp is about _____ longer than the ML cusp

A

BL
distobuccal
mesiobuccal
1mm

45
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Mesial View

! The palatal root does not _____ towards the palate as much as the _____

A

flare

first molar

46
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The buccolingual crown dimension is _____ than the mesiodistal crown dimension ***
! The crown is wider buccolingually in the _____ half of the crown

A

greater

mesial

47
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The outline of the occlusal surface resembles a _____

A

rhomboid

48
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The M contact area is located _____ to the center of the crown
! the D contact area is located at the _____ of the crown

A

buccal

center

49
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The cusp size (from largest to smallest:
“ _____
“ _____
“ _____
“ _____

A

ML
MB
DB
DL

50
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! There is considerable _____ in the size of the DL cusp
“ *About _____ of the time the DL cusp is missing

A

variation

1/3

51
Q 
UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
Present:
" \_\_\_\_\_
"  \_\_\_\_\_ 
"  \_\_\_\_\_
A

stuart groove
oblique ridge
trigone

52
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar – Occlusal View
! The same _____ major grooves on the maxillary 1st molar are present:
“ _____
“ Facial/Buccal
“ _____ or _____
“ _____
“ Transverse groove of the oblique ridge

A

central
DL, DO
lingual

53
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Distal View
! The _____ and _____ cusp tips are visible beyond the outline of the _____ and _____ cusps
“ The M cusps are _____

A

MB, ML
DB, DL
higher

54
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar–Distal View
Like the Maxillary first molar:
! The D marginal ridge is located more _____
! The D furcation separates the _____ and _____ cusps
“ Located closer to the _____ than the other furcations
“ Root trunk _____ from this view

A 
cervical
DB
P
root tips
longer
55
Q

UNIQUE CHARACTERISTICS Maxillary Second Molar– Lingual View
! The crown shows a _____ taper
“ _____ slightly larger than _____ M-D
! The roots curve _____

A

lingual
B half
L half
distally

56
Q

Maxillary Third Molar

Eruption: _____

A

17-21 years

57
Q

Mandibular First Molar

Eruption: _____

A

6-7 years

58
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension
! The outline form is a _____

A

greater

trapezoid

59
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
_____ cusps:
! The _____ cusp is the largest, widest, and highest of the 3 buccal cusps
! The _____ cusp is smaller and sharper than the other buccal cusps

A

3
MB
D

60
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The two lingual cusps (ML and DL) are visible because they are _____ than the buccal cusps
! The buccal cusps are more _____ compared to the lingual cusps
“ Why?


A

longer

flat

61
Q 
UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
!  The MB groove 
" \_\_\_\_\_ than the DB
groove
" may have a deep pit at its \_\_\_\_\_ end
" **area of \_\_\_\_\_ lesions also**
A

longer
cervical
Class I

62
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact area is located at the junction of the _____ and _____ third
“ _____ to the mesial contact

A 
occlusal
middle
occlusal
middle
cervical
63
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Buccal View
! There are _____ roots that are nearly the same length
“ Mesial - _____ pulpal chambers
“ Distal – _____ chamber
! The _____ root is longer than the _____ root
! The _____ root is straighter than the _____ root

A 
2
2
1
M
D
D
M
64
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Mesial View
! The buccal height of contour is located in the _____ third of the crown
! The lingual height of contour is located in the _____ third of the crown

A

cervical

middle

65
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The shape from the proximal view is a _____

A

greater

rhomboid

66
Q

UNIQUE CHARACTERISTICS First Mandibular First Molar–Mesial View
! The _____ root is wider B-L than the _____ root
“ Contains the _____ pulpal canal
“ Contains the _____ pulpal canal
! The large dimension of the mesial root prevents the _____ root from being visible when viewed from the _____

A 
M
D
MB
ML
distal
M
67
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The M-D crown dimension is _____ than the B-L crown dimension
” **unlike _____
! The greatest B-L dimension is at the _____ cusp area

A

greater
maxillary molars
DB/DL

68
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The outline form is described as:
“ a _____
“ a _____

A

pentagon

hexagon

69
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The crown tapers _____
“ smaller M-D dimension on the _____ surface

A

lingually

lingual

70
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The M contact area is located _____l to the center of the crown
! The D contact area is located _____ to the center of the crown
“ _____ to the M contact

A

buccal
buccal
lingual

71
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The cusp size (from largest to smallest) :
“ _____
“ _____ = _____
“ _____
“ _____

A 
MB
ML
DL
DB
D
72
Q 
UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
!  There are three fossae: 
" \_\_\_\_\_
" \_\_\_\_\_ 
" \_\_\_\_\_
A

central
mesial
distal

73
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! There are _____ major grooves present:
“ _____
“ _____
“ _____
“ _____
! The central groove has a _____ M-D form

A 
4
central
MB
DB
L
zigzag
74
Q

UNIQUE CHARACTERISTICS Mandibular First Molar – Occlusal View
! The triangular ridges of the MD and ML cusps and
DB and DL cusps meet to form _____ transverse ridges**
! D cusp has _____ triangular ridge

A

2

lone

75
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Distal View

! The D marginal ridge is located more _____ than the M marginal ridge

A

cervical

76
Q

UNIQUE CHARACTERISTICS Mandibular First Molar–Distal View

! The _____ root is rounder in cross-sectional form than the _____ root

A

distal

mesial

77
Q

UNIQUE CHARACTERISTICS Mandibular First Molar– Lingual View

! The greater height of the _____ cusps hide the _____ cusps from view

A

lingual

buccal

78
Q

UNIQUE CHARACTERISTICS Mandibular First Molar– Lingual View

! The mesiodistal dimension of the mesiolingual cusp is often slightly greater than the _____ cusp

A

distolingual

79
Q

Mandibular Second Molar

Eruption: _____

A

11-13 years

80
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar– Buccal View
! The M-D crown dimension is _____ than the O-C crown dimension
! The outline form of the crown is a _____

A

greater

trapezoid

81
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar–
Buccal View
_____ Buccal cusps:
! The _____ cusp is the larger, wider, and higher B cusp
! There is one buccal _____ separating the cusps.
“ The buccal groove may end in the _____ of the crown with a _____

A

2
MB
developmental groove
middle

82
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar–
Buccal View
! The M contact area is located at the junction of the _____ and _____ thirds
! The D contact is located in the _____ third
“ _____ occlusogingivally
“ _____ to the mesial contact

A 
occlusal
middle
middle
centered
cervical
83
Q 
UNIQUE CHARACTERISTICS Mandibular Second Molar–
Buccal View
!  There are two roots that are
\_\_\_\_\_
" Mesial - \_\_\_\_\_ pulpal chambers
" Distal – \_\_\_\_\_ chamber
!  The M root slightly \_\_\_\_\_
than the D root
!  The root tips are relatively \_\_\_\_\_ to each other
A 
almost the same length
2
1
longer
parallel
84
Q

UNIQUE CHARACTERISTICS
Mandibular Second Molar– Mesial View
! The B-L crown dimension is _____ than the O-C crown dimension
! The shape from the proximal views is a _____

A

greater

rhomboid

85
Q

UNIQUE CHARACTERISTICS
Mandibular Second Molar– Mesial View
! The B height of contour is located in the _____ third of the crown
! The L height of contour is located in the _____ third of the crown

A

cervical

middle

86
Q 
UNIQUE CHARACTERISTICS
Mandibular Second Molar– Mesial View
!  The \_\_\_\_\_ root is wider B-L 
" Contains the \_\_\_\_\_ pulpal canal
" Contains the \_\_\_\_\_ pulpal canal
A

mesial
MB
ML

87
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The M-D crown dimension is _____ than the buccolingual crown dimension **
! The greatest B-L dimension is in the _____ cusp area

A

greater

MB/ML

88
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! The outline form is _____

A

square

89
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The M contact area is located _____ to the center of the crown
! the D contact area is located at the _____ of the crown
“ _____ to the M contact

A

buccal
center
lingual

90
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! The cusp size (from largest to smallest):
“ _____
“ _____
“ _____
“ _____

A

MB
ML
DB
DL

91
Q 
UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
!  There are three fossae: 
" \_\_\_\_\_
" \_\_\_\_\_ 
" \_\_\_\_\_
A

central
mesial
distal

92
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar –
Occlusal View
! There are 3 major grooves present:
“ _____
“ _____
“ _____
! The central groove forms a _____ with the buccal and lingual grooves

A

central
buccal
lingual
+ pattern

93
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar – Occlusal View
! The triangular ridges of the MB and ML cusps and DB and DL cusps meet to form _____

A

2 transverse ridges

94
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar–
Distal View
! The distal marginal ridge is located more _____ than the mesial marginal ridge

A

cervical

95
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar–
Distal View
! The cross-sectional form is similar to the _____

A

mandibular first molar

96
Q

UNIQUE CHARACTERISTICS Mandibular Second Molar–
Lingual View
! The _____ cusp is less high than the _____ cusp
! The M-D dimension of the _____ cusp is slightly greater than the _____ cusp

A

DL
ML
MB
ML

97
Q

Mandibular Third Molar

Eruption: _____

A

17-21 years

Dental Development and Anatomy (13 decks)

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