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dental anatomy > mandibular pre-molars > Flashcards

mandibular pre-molars Flashcards

1
Q

Functionally resembles canine;

A

mandib 1st pre-molar

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2
Q

mandib 1st pre-molar

A

no significant lingual cusp; shorter root

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3
Q

Larger crown and root than first premolar;

A

2nd mandib pre molar

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4
Q

functionally resembles molar

A

Mandibular Second Premolar

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5
Q

(One B cusp and one L cusp)

A

H and U type

mandib 2nd pre molar

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6
Q

most common type of Mandibular Second Premolar

A

Y-type

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7
Q

Y-type

A

One B cusp and two L cusps

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8
Q

leeway’s space

A

Space gained by the difference in mesiodistal dimensions of the premolars and the primary molars

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9
Q

sharp well defined cusp and similar to canine

A

buccal aspect of mandib 1st pre molar

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10
Q

tf mand 1st pre molar has a bell shaped crown

A

T

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11
Q

mesial ridge longer than distal ridge of mand 1st pre molar(buccal view)

A

f

shorter

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12
Q

mesial slope of mand 1st pre molar

A

has a concavity

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13
Q

tf mand 1t pre molar has no developmental depressions or concavities

A

f

Distinct facial lobes and developmental depressions

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14
Q

tf

CEJ is flat on mand 1st pre molar

A

F

CEJ slightly convex toward apex but less than anterior teeth

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15
Q

tf lingual cusps are huge on mand 1st pre molar

A

f they are small and permit occlusal surface to be visible

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16
Q

mesialdistally ligual surface narrower than buccal

A

mandibular 1st pre molar

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17
Q

tf

only 1 surface visible on lingual aspect of mand 1st premolar

A

F multiple surfaces

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18
Q

ridges visible on lingual aspect of mand 1st pre molar

A

buccle triangular rdge and transverse ridge

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19
Q

tf only distal marginal ridge visible from lingual aspct of mand 1st pre molar

A

f

distal and mesial

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20
Q

mand 1st premolar

Lingual height of contour almost —— on the crown

A

Lingual height of contour almost centered on the crown

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21
Q

unique to mandib 1st pre molar

A

Prominent mesiolingual developmental groove

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22
Q

mesial aspect of mand 1st pre molar

Crown inclines—– over the root

A

Crown inclines lingually over the root

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23
Q

tf short lingual cusp tipps the Occlusal plane is “tipped” lingually in mand 1st pre molat

A

T

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24
Q

tf

mesial marginal ridge of mand 1st pre molar

is perpendicular to long axis of tooth

A

f

mesial marginal ridge is the only marginal ridge of all posterior teeth not perpendicular to long axis of tooth

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25
Q

centered over root vs centered over lingual border of tooth of mand 1st pre molar

A

buccal cusp vs. lingual cusp

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26
Q

which developmental groove is visible from mesial aspect of mand 1st pre molar

A

ML developmental groove

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27
Q

tf

transverse ridge presense will prevent central grove from being visible of mand 1st pre molar

A

T

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28
Q

sloped mesial marginal ridge of mand 1st pre molar allows for

A

More of the occlusal surface visible

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29
Q

distal aspect of mand 1st pre molar

A

Wider buccolingually than mesial surface

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30
Q

tf on distal aspect of mand 1st pre molar

Distal marginal ridge perpendicular to the long axis

A

t

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31
Q

tf on mand 1st pre molar

mesial marginal ridge more occlusally positioned than

distal marginal ridge

A

f

Distal marginal ridge perpendicular to the long axis (and more occlusally positioned than mesial marginal ridge)

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32
Q

mesial aspect of mand 1st premolar

A

more occlusal surface visible than distal aspect

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33
Q

less curved CEJ

A

distal over mesial of mand 1st pre molar

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34
Q

in line with buccal cusp and apex

A

contact area of mandib 1st pre molar

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35
Q

mand 1st pre molar distal aspect

A

Contact area slightly broader than the mesial

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36
Q

Diamond shaped outline form

A

occlusal aspect of mand 1st pre molar

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37
Q

Prominent buccal ridge but uniformly convex buccal outline with much of the buccal surface visible

A

occlusal of mand 1st pre molar

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38
Q

distal outline more rounded and convex

A

than mesial outline of mand 1st premolar

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39
Q

convex with indentation

A

Mesial outline of mand 1st pre molar

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40
Q

indentation of mand 1st pre molar

A

where ML groove is located;

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41
Q

Prominent line angles but rounded

A

occlusal of mand 1st pre molar

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42
Q

small lingual cusp

A

mand 1st pre molar

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43
Q

central grove of mand 1st pre molar

A

often not distinct

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44
Q

transverse ridge of

A

occlusal of mand 1st pre molar

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45
Q

tf only mesial fossa of mand 1st pre molar visible

A

f

mesial and distal fossa

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46
Q

which marginal ridge is shorter on mand 1st pre molar

mesial or distal

A

mesial

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47
Q

both converge to lingual)

A

mesial and distal marginal ridge of mand 1st pre molar

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48
Q

ML groove visible

A

occlusal aspect of mand 1st pre molar

49
Q

mand 1st pre molar; Occlusal surface (table) occupies most of the—- half of the tooth

A

Occlusal surface (table) occupies most of the lingual half of the tooth

50
Q

Mesial contact, facial cusp tip, and distal contact of mand 1st pre molar

A

fall on straight line which is centered on the crown faciolingually

51
Q

root of mand 1st pre molar

A

Wider buccolingually than mesiodistally

52
Q

tf mand 1st pre molar is ovoid

(cross section)

53
Q

Single root of mand 1s pre molar tapering to —- —- and

A

Single root tapering to sharp apex and pulp canal

54
Q

mand 1st pre molar

A

Wider buccolingually than mesiodistally

55
Q

sloped occlusal surface

A

mand 1st pre molar

56
Q

mand 1st pre molar

A

can have two roots (one buccal and one lingual)

but usually only one root canal

57
Q

ML developmetnal depression

A

visible on Mand 1st pre molar

58
Q

larger and similar to canine

59
Q

tf mand P2 is bell shape

60
Q

shorter, less pointed and form obtuse angle

A

buccal cusp of mand P2

61
Q

tf mesial cusp is longer than distal cusp in mand P2

62
Q

tf mand P1(mesial and distal cusp slope) is more inclined than mand P2

63
Q

occlusocervically mesial crown of Mand P2 is

A

longer than distal crown(mand P2)

64
Q

shorter buccal cusp of mand P2

A

cause M&D contacts appear to be higher

65
Q

smooth with indistinct conveixities or concavities

A

Mand P2 facial surface

66
Q

conical with flattened facial surface

A

Mand P2 root (buccal)

67
Q

blunt apex

A

root of Mand P2

68
Q

Mand P2

A

CEJ straighter than teeth anterior to it

69
Q

tf mand P2 is

Wider mesiodistally but

shorter occlusogingivally

than MandP1

A

F

wider and longer

70
Q

Mesial and distal crown outlines convex

71
Q

tf mand P2 has no concavities on mesial and distal crown outline

72
Q

2 typs of cusps of mand P2

A

bucal

ML

DL

73
Q

Lingual cusp or cusps shorter

A

than buccal cusps of Mand P2

74
Q

tf occlusal surface more visible in mand P2 than mand P1

A

F

Occlusal surface less visible than in P1

75
Q

ML cusp is larger than DL cusp

A

in y type mand P2

76
Q

smooth and convex

A

root of mand P2

77
Q

tf root of Mand P2 tapers to the lingual more than P1

A

F

tapers to the lingual less than P1

78
Q

mesial aspect of mand P2

A

Crown and root wider buccolingually than madn P1

79
Q

which buccal cusp is shorter

mand P1 or mand P2

80
Q

B cusp tip slightly buccal to center of root

81
Q

higher lingual cusp occlusally

mand P2 or Mand P1

82
Q

Mesial (and distal) marginal ridges—– to long axis of tooth of mand P2

A

Mesial (and distal) marginal ridges perpendicular to long axis of tooth of mand P2

83
Q

tf mand P2 has ML developmental groove

84
Q

CEJ less curved

Mand P1 or Mand P2

85
Q

root apex blunted

mand P1

or mand P2

86
Q

TF on mand P2 DL cusps are visible on mesial aspect

A

F

not visible on mesial aspect

87
Q

Mand P2 lacks

A

transverse ridge; defined central groove

on mesial aspect

89
Q

tf oclusal table of mand P2 is more perpnedicular to long axis than mand P1

90
Q

mand P2

—- crown outline with a —— tilt

A

mand P2

Rhomboidal crown outline with a lingual tilt

91
Q

tf on distal aspect of mand P2

Contact area larger and wider buccolingually than mesial aspect

92
Q

distal aspect of mand P2

all cusp visible

93
Q

DL cusp smaller than ML cusp

A

in Y-type P2

(distal aspect)

94
Q

distal aspect mand P2

largest cusp

A

buccal cusp

95
Q

prominent triangular ridge

A

on buccal cusp of mand P2(distal view)

96
Q

perpendicular to long axis

A

Distal marginal ridge of mand P2

97
Q

mand P2 distal view

A

CEJ flattened and similar to what is seen on molars

98
Q

square outline form

A

occlusal of mand P2(y type)

99
Q

parralel to each other

A

mesial and distal aspects of mand P2(occlusaL)

100
Q

Less prominent buccal ridge with less distinct developmental depressions

A

occlusal of mand P2

101
Q

what is major grovve pattern of mand P2(occlusal)

102
Q

order the follwoing cusp in terms of size on mand P2

DL cusp

ML cusp

B cusp

A

B cusp > ML cusp > DL cusp

103
Q

lingual grove separates

A

2 lingual cusps of mand P2(occlusal)

104
Q

tf lingual groove of mand P2 is mesial to center

A

F

distal to center

105
Q

name type of pits of mand P2

A

Mesial and distal triangular fossae with pits

and central pits

106
Q

• More rounded outline form than Y-type

A

H and U type Mand P2

107
Q

tf

“H” and “U” types ; mesial and distal profiles are parallel to each other

A

f

Mesial and distal profiles not as parallel

108
Q

converge toward lingual

A

Mesial and distal profiles of H and U types

109
Q

No lingual groove or central pit

A

H and U type Mand P2

110
Q

tf

in mand P2 h and u types

Buccal cusp smaller than lingual cusp

A

F

Buccal cusp larger than lingual cusp

111
Q

root of Mand P2

A

Single root with one pulp canal

112
Q

tf mand P2 root Slightly wider buccolingually and longer than P1

113
Q

root apex of mand P2

114
Q

root apex of mand P2

A

incline distally

115
Q

Rarely bifurcated of trifurcated root

A

mand P2 roots

116
Q

round to ovoid cross section

A

mand P2 cross section

117
Q

slightly flattened buccal surface

A

mand P2(cross section)

118
Q

cross section of mand P2

A

Slight taper to the lingual

119
Q

Single root canal usually

dental anatomy (12 decks)

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