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Oral Anatomy > Lecture 4 > Flashcards

Lecture 4 Flashcards

1
Q

upper right premolar numbers

A

4 and 5

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2
Q

upper left premolar numbers

A

12 and 13

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3
Q

lower left premolar numbers

A

20 and 21

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4
Q

lower right premolar numbers

A

28 and 29

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5
Q

functions of premolars

A
  • mastication
  • maintaining vertical dimension of face
  • assist canines to cut and shear food
  • support cheeks and corners of mouth
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6
Q

Most premolars have _______(one buccal and one lingual) but sometimes there are ____ (one buccal and two lingual)

A

two cusps; three cusps

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7
Q

premolars develop from ___ facial lobes and from one or two ____ lobes corresponding to one or two ____ cusps

A

three; lingual; lingual

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8
Q

the CEJ is ____ on premolars, compared to anterior teeth

A

less curved

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9
Q

roots taper narrower ____ and ____

A

apically; lingually

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10
Q

premolars have two or three ____ versus _____

A

occlusal cusps; incisal edge

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11
Q

marginal ridges are more ____, except mesial marginal ridge of mandibular first premolar

A

horizontal

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12
Q

crowns of premolars are ____ compared to anterior teeth

A

shorter

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13
Q

height of contour on premolars

A
  • in cervical third on facial (not too close to CEJ except mandibular first premolar)
  • in middle third on lingual
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14
Q

proximal contact areas more ____ and broader

A

cervical

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15
Q

All Premolars From Buccal View: have ___ outline of crown (like canine)

A

pentagon

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16
Q

All Premolars From Buccal View: contact areas are ____; the distal contact is more ___ than the mesial (except mandibular first premolar)

A

convex; cervical

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17
Q

All Premolars From Buccal View: ____ cusp ridge is shorter than the ____ (except on the maxillary first premolar)

A

mesial; distal

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18
Q

All Premolars From Lingual View: crown outline narrows toward ____ so some ____ surfaces are visible (except some three cusp type mandibular second premolars with two lingual cusps, seen best on occlusal view)

A

lingual; proximal

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19
Q

All Premolars From Lingual View: ____ cusp longer than ____ cusp

A

buccal; lingual

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20
Q

All Premolars From Lingual View: ___ cusp off center to the ____, except on the mandibular first premolar

A

lingual; mesial

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21
Q

All Premolars From Proximal Views: ____ marginal ridges are more ____ than ____, except on mandibular first premolar

A

mesial; occlusal; distal

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22
Q

All Premolars From Occlusal View: they are wider ____ than _____

A

faciolingually; mesiodistally

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23
Q

All Premolars From Occlusal View: occlusal table bound by ____ and _____

A

marginal ridges; cusp ridges

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24
Q

All Premolars From Occlusal View: proximal contacts are located ____ to the _____; ____ embrasure spaces are larger

A

buccal; buccolingual midline; lingual

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25
Q

All Premolars From Occlusal View: _____ join to form ____ ridges (except on three cusp type mandibular second premolars)

A

triangular ridges; transverse

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26
Q

All Premolars From Occlusal View: a groove extends from ____ to ____ (except on some mandibular first premolars)

A

mesial fossa; distal fossa

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27
Q

Arch Traits That Differentiate Maxillary From Mandibular Premolars: mandibular premolars have more noticeable _____ than maxillary

A

lingual crown tilt

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28
Q

Arch Traits That Differentiate Maxillary From Mandibular Premolars: mandibular premolars have less prominent ____

A

buccal ridge

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29
Q

all premolars are larger _____ than _____

A

buccolingually; mesiodistally

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30
Q

BUT, the mandibular premolar is closer to ____ (buccolingual slightly greater than mesiodistal)

A

square

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31
Q

maxillary premolar is ______ (buccolingual is obviously greater than mesiodistal)

A

rectangular

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32
Q

Relative Size of Maxillary Premolar Crowns From the Buccal View: maxillary first premolar is ____ than the second

A

larger

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33
Q

Relative Size of Maxillary Premolar Crowns From the Buccal View: there is more convergence from proximal contact to the cervical on the ____ than the ____

A

first; second

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34
Q

Location of Contacts for Maxillary Premolars From the Buccal View: mesial contact is ____, distal contact is _____ (for both types)

A

junction of occlusal and middle third; middle third

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35
Q

Location of Buccal Cusp Tip of Maxillary Premolars From the Buccal View: on the maxillary second, the ___ cusp ridge is shorter than the ____ (cusp tip is ____ or ____)

A

mesial; distal; mesial; centered

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36
Q

Location of Buccal Cusp Tip of Maxillary Premolars From the Buccal View: the maxillary first premolar has _____ longer than the _____ (this is unique); the cusp tip is ____

A

mesial cusp ridge; distal; distal

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37
Q

Shape of the Buccal Cusp of Maxillary Premolars From the Buccal View: the cusp is sharper on ____ than _____

A

maxillary first premolar; second

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38
Q

Buccal Ridge and Depression of Maxillary Premolars From the Buccal View: the buccal ridge is more prominent on the ____ than _____

A

maxillary first premolar; maxillary second

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39
Q

Root of Maxillary Premolars From the

Buccal View: maxillary ____ premolar is more likely to have two roots, whereas the ____ premolar has one root

A

first; second

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40
Q

Relative Cusp Size of Maxillary Premolars From the Lingual View: the ___ cusp is shorter than the ____; more so on the maxillary first than the maxillary second

A

lingual; buccal

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41
Q

Cusp Ridges of Maxillary Premolars From the Lingual View: the lingual cusp is relatively sharper on the _____ than on the _____

A

maxillary second premolar; first premolar

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42
Q

Lingual Cusp Position for Maxillary Premolars From the Lingual View: both maxillary first and second premolars have the lingual cusp tip positioned ____ to the midroot axis

A

mesial

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43
Q

Marginal Ridges of Maxillary Premolars From the Lingual View: the ____ marginal ridge is more ____ than _____ for both maxillary first and second premolars (best seen when comparing mesial and distal views)

A

distal; cervical; mesial

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44
Q

Roots of Maxillary Premolars From the

Lingual View: on the maxillary first premolar, the ___ root is shorter than the ____ root

A

lingual; buccal

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45
Q

Roots of Maxillary Premolars From the

Lingual View: the root crown ratio is 1.56 on the ____ and 1.82 on the ____

A

first maxillary premolar; second maxillary premolar

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46
Q

Crown Shape and Morphology of Maxillary Premolars From the Proximal Views: maxillary premolars have ____ outline

A

trapezoid

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47
Q

Crown Shape and Morphology of Maxillary Premolars From the Proximal Views: the _____ is the only premolar to have a crown depression (always on the mesial)

A

maxillary first premolar

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48
Q

Relative Cusp Height of Maxillary Premolars From the Proximal Views: the ____ cusp is shorter than the ____ cusp, more so on the maxillary first premolar than second premolar

A

lingual; buccal

49
Q

Height (Crest) of Contour of Maxillary Premolars From the Proximal Views: the facial height of contour is in the ____ (like all teeth)

A

cervical

50
Q

Height (Crest) of Contour of Maxillary Premolars From the Proximal Views: the lingual height of contour is in the _____ (like all posterior teeth)

A

middle

51
Q

Distance Between Cusps on Maxillary Premolars From the Proximal Views: the distance between cusps is the same for both maxillary first and second premolars; both ___ and ____ cusp tips are located ____

A

buccal; lingual; over the root

52
Q

Marginal Ridge Grooves of Maxillary Premolars From the Proximal Views: the marginal ridge groove is found most often on : ______ (not as common on all other maxillary premolars)

A

the mesial marginal ridge of maxillary first premolars

53
Q

Cervical Lines of Maxillary Premolars When Comparing the Proximal Views: there is more CEJ curvature on ____ than ____ on both 1st and 2nd premolars (as on all premolars and anterior teeth)

A

mesial; distal

54
Q

Roots and Root Depressions of Maxillary Premolars From the Proximal Views: _____ is the only premolar with the ____ more pronounced than the distal

A

maxillary first premolar; mesial root depression

55
Q

the maxillary first premolar is the only premolar with ____ joining with the _____

A

mesial crown depression; deep root depression

56
Q

_____ more pronounced on maxillary second premolar

A

distal root depression

57
Q

Relative Size of Maxillary Premolars From the Occlusal View: _____ likely to be slightly larger than ____

A

maxillary first premolar; the second

58
Q

Grooves and Fossae of Maxillary Premolars From the Occlusal View: the ____ of the maxillary first premolar is longer than on the second premolar

A

central groove

59
Q

the maxillary second premolar has more ____ than the first

A

supplemental grooves

60
Q

Both maxillary premolars have noticeably greater dimension _____ than _____ (by over 2 mm)

A

faciolingually; mesiodistally

61
Q

Outline of Maxillary Premolars From the

Occlusal View: the ____ is more prominent on the maxillary first premolar than the second

A

buccal ridge

62
Q

Outline of Maxillary Premolars From the

Occlusal View: the maxillary first premolar is more _____ than the second premolar

A

asymmetrical (hexagonal)

63
Q

Contact Areas and Heights of Contour of Maxillary Premolars From the Occlusal View: contacts are ____ for both

A

near the junction of the buccal/middle thirds

64
Q

mandibular premolars _____ more than maxillary premolars

A

vary in shape

65
Q

_____ is the only premolar more likely to have 3 cusps (one buccal and two lingual: mesiolingual and distolingual)

A

mandibular second premolar

66
Q

Relative Crown Shape and Size of Mandibular Premolars From the Buccal View: the _____ is longer than the ____

A

mandibular first premolar; second

67
Q

Relative Crown Shape and Size of Mandibular Premolars From the Buccal View: both have rounded _____ (first wider than second)

A

shoulders

68
Q

Relative Crown Shape and Size of Mandibular Premolars From the Buccal View: the ____ of the mandibular first premolar is sharper than the second

A

buccal cusp apex

69
Q

Relative Crown Shape and Size of Mandibular Premolars From the Buccal View: cusp ridge notches are more common on the ____ of the first and the ____ of the second

A

mesial; distal

70
Q

Morphology of Mandibular Premolars From the Buccal View: buccal developmental grooves on either side of buccal ridge (when present) are likely deeper on the ____ of the first premolar and on the ____ of the second premolar

A

mesial; distal

71
Q

___ are shorter than ____

A

mesial cusp ridges; distal

72
Q

Cervical Lines of Mandibular Premolars From the Buccal View: CEJ more curved on ____ than ____

A

mandibular first premolar; second

73
Q

Contact Areas of Mandibular Premolars From the Buccal View: the mandibular first premolar is the only premolar (only adult tooth) where the mesial contact is ____ than the distal

A

more cervical

74
Q

Contact Areas of Mandibular Premolars From the Buccal View: first premolar distal contact is in _____ and mesial contact is ____

A

occlusal third; at the junction of the occlusal and middle third

75
Q

Roots of Mandibular Premolars From the

Buccal View: both types of mandibular premolar roots taper to ____ with ____ of apex more common

A

apex; distal bend

76
Q

root to crown ratio on _____ is larger

A

mandibular second premolar

77
Q

Crown Shape of Mandibular Premolars From the Lingual View: most mandibular premolars taper narrower toward _____ (EXCEPT 3 cusp type of mandibular second premolar where lingual half may be wider than buccal half)

A

lingual

78
Q

Lingual Cusps of Mandibular Premolars From the Lingual View: lingual cusp of mandibular first premolar is ____ than the buccal, is ____ and is located ____

A

shorter; nonfunctional; mesial, center, or distal

79
Q

Lingual Cusps of Mandibular Premolars From the Lingual View: the lingual cusp of the mandibular second premolar (with one lingual cusp) is slightly ___ than the buccal and is ___ to the midroot axis

A

mesial

80
Q

Lingual Cusps of Mandibular Premolars From the Lingual View: when the mandibular 2nd premolar has two lingual cusps, the _____ cusp is normally wider and longer than the ____

A

mesiolingual; distolingual

81
Q

Marginal Ridges of Mandibular Premolars From the Lingual View: the mandibular first premolar is the only premolar (only posterior tooth) to have its mesial marginal ridge more ____ than the distal

A

cervical; distal

82
Q

Grooves on Mandibular Premolars From the Lingual View: only mandibular second premolar with two lingual cusps have a ____ separating them

A

lingual groove

83
Q

Grooves on Mandibular Premolars From the Lingual View: most mandibular first premolars have a _____ separating the ____ from the _____

A

mesiolingual groove; mesial marginal ridge; mesial cusp ridge of the lingual cusp

84
Q

Roots of Mandibular Premolars From the

Lingual View: roots taper ____ and to ____

A

lingual; apex

85
Q

Crown Shape of Mandibular Premolars From the Proximal Views: crowns tip noticeably to the ____, more so on _____ than ____

A

mandibular first premolar; second

86
Q

Crown Shape of Mandibular Premolars From the Proximal Views: outlines are ____

A

rhomboid

87
Q

Crown Shape of Mandibular Premolars From the Proximal Views: lingual cusps are ___ than buccal, more so on first with nonfunctional lingual cusp

A

shorter

88
Q

Marginal Ridges of Mandibular Premolars From the Proximal Views: the mesial marginal ridge of mandibular first premolar slopes at ____, nearly parallel to _____

A

45 degrees; buccal triangular ridge

89
Q

Marginal Ridges of Mandibular Premolars From the Proximal Views: _____ is very short

A

lingual triangular ridge

90
Q

Marginal Ridges of Mandibular Premolars From the Proximal Views: other posterior marginal ridges are more _____

A

horizontal

91
Q

Marginal Ridges of Mandibular Premolars From the Proximal Views: occlusal plane in relation to midroot axis line ___ on 1st mandibular premolar

A

45 degrees

92
Q

Marginal Ridge Grooves and Mesiolingual Grooves on Mandibular Premolars From the Proximal
Views: mesiolingual groove is often present on _____, not _____

A

mandibular first premolars; seconds

93
Q

second premolars ____ have marginal ridge grooves

A

sometimes

94
Q

Height (Crest) of Contour of Mandibular Premolars From the Proximal Views: the buccal height of contour is the _____ (near the CEJ on first premolar)

A

cervical third

95
Q

Height (Crest) of Contour of Mandibular Premolars From the Proximal Views: the lingual height of contour is in ____, nearly to cusp tip in mandibular first premolar, and beyond root outline)

A

middle third

96
Q

Cervical Lines of Mandibular Premolars From the Proximal Views: more CEJ curve on ____ than ___ surface (as on all premolars)

A

mesial; distal

97
Q

Cervical Lines of Mandibular Premolars From the Proximal Views: ___ CEJ more ____ than ____ CEJ (as on all premolars)

A

lingual; occlusal; buccal

98
Q

Roots of Mandibular Premolars From the

Proximal Views: roots taper to ____ (as they all do)

A

apex

99
Q

Root Depressions of Mandibular Premolars From the Proximal Views: _____ has mesial and distal root depressions, deeper on ____

A

mandibular first premolar; distal

100
Q

Root Depressions of Mandibular Premolars From the Proximal Views: mandibular second premolar likely to have ____ but none on ____

A

distal root depression; mesial

101
Q

Outline Shape of Mandibular Premolars From the Occlusal View: the mandibular first premolar has more bulk in ___ half than ____ half

A

distal; mesial

102
Q

Outline Shape of Mandibular Premolars From the Occlusal View: the ____ line angle is flat or pushed in on the mandibular first premolar

A

mesiolingual

103
Q

the mandibular first premolar has a ____ occlusal outline

A

diamond shaped

104
Q

the occlusal table on the mandibular first premolar is ____

A

triangular

105
Q

Outline Shape of Mandibular Premolars From the Occlusal View: the mandibular second premolar has ____ outline (on 2 cusped type)

A

almost rounded

106
Q

3 cusped type has more ___ outline ; may actually taper narrower from ___ to ____

A

square; lingual; buccal

107
Q

occlusal tables are ____ on mandibular second premolars

A

square

108
Q

Ridges, Fossae, and Grooves of Mandibular First Premolars From the Occlusal View: prominent ____ may separate ____ and ____ fossae (with no central groove)

A

transverse ridge; mesial; distal

109
Q

Ridges, Fossae, and Grooves of Mandibular First Premolars From the Occlusal View: mesial and distal _____ fossae resemble ____

A

circular; “snake eyes”

110
Q

Ridges, Fossae, and Grooves of Mandibular First Premolars From the Occlusal View: the ____ fossa is larger than the ____

A

distal; mesial

111
Q

Ridges, Fossae, and Grooves of Mandibular First Premolars From the Occlusal View: _____ extends from _____

A

mesiolingual groove; mesial circular fossa

112
Q

Ridges, Fossae, and Grooves of the Two-Cusp Mandibular Second Premolars From the Occlusal View: ____ connects mesial and distal fossae

A

central groove

113
Q

Ridges, Fossae, and Grooves of the Two-Cusp Mandibular Second Premolars From the Occlusal View: groove pattern may be ___ or ___ shaped

A

H; U

114
Q

Ridges, Fossae, and Grooves of the Two-Cusp Mandibular Second Premolars From the Occlusal View: ___ and ____ triangular ridges form ____

A

buccal; lingual; transverse ridge

115
Q

Ridges, Fossae, and Grooves of the Three-Cusp Mandibular Second Premolar: there are ____ triangular ridges that do not connect, so there is no ____

A

three; transverse ridge

116
Q

Ridges, Fossae, and Grooves of the Three-Cusp Mandibular Second Premolar: only premolar with a _____

A

central fossa

117
Q

Ridges, Fossae, and Grooves of the Three-Cusp Mandibular Second Premolar: central groove may be called mesial and distal grooves, joining at _____

A

central fossa

118
Q

Ridges, Fossae, and Grooves of the Three-Cusp Mandibular Second Premolar: lingual groove forms ____ pattern

A

Y

119
Q 
\_\_\_\_\_ are not common on
mandibular premolars (although the mandibular first premolar often has a \_\_\_\_\_\_, which separates the mesial marginal ridge from mesial cusp ridge of lingual cusp)
A

marginal ridge grooves; mesiolingual groove

Oral Anatomy (9 decks)

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