mandibular pre-molars Flashcards Preview

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Flashcards in mandibular pre-molars Deck (119):
1

Functionally resembles canine;

mandib 1st pre-molar

2

mandib 1st pre-molar

no significant lingual cusp; shorter root

3

Larger crown and root than first premolar;

2nd mandib pre molar

4

functionally resembles molar

Mandibular Second Premolar

5

(One B cusp and one L cusp)

H and U type

mandib 2nd pre molar

6

most common type of Mandibular Second Premolar

Y-type

7

Y-type

One B cusp and two L cusps

8

leeway's space

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

9

sharp well defined cusp and similar to canine

buccal aspect of mandib 1st pre molar

10

tf mand 1st pre molar has a bell shaped crown

T

11

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

f

shorter

12

mesial slope of mand 1st pre molar

has a concavity

13

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

f

Distinct facial lobes and developmental depressions

14

tf

CEJ is flat on mand 1st pre molar

F

CEJ slightly convex toward apex but less than anterior teeth

15

tf lingual cusps are huge on mand 1st pre molar

f they are small and permit occlusal surface to be visible

16

mesialdistally ligual surface narrower than buccal

mandibular 1st pre molar

17

tf

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

F multiple surfaces

18

ridges visible on lingual aspect of mand 1st pre molar

buccle triangular rdge and transverse ridge

19

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

f

distal and mesial 

20

mand 1st premolar

Lingual height of contour almost ------ on the crown

Lingual height of contour almost centered on the crown

21

unique to mandib 1st pre molar

Prominent mesiolingual developmental groove

22

mesial aspect of mand 1st pre molar

Crown inclines----- over the root

Crown inclines lingually over the root

23

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

T

24

tf

mesial marginal ridge of mand 1st pre molar

is perpendicular to long axis of tooth

f

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

25

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

buccal cusp vs. lingual cusp

26

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

 

ML developmental groove

27

tf 

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

T

28

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

More of the occlusal surface visible

29

distal aspect of mand 1st pre molar

Wider buccolingually than mesial surface

30

tf on distal aspect of mand 1st pre molar

Distal marginal ridge perpendicular to the long axis

t

31

tf on mand 1st pre molar

mesial marginal ridge more occlusally positioned than

distal marginal ridge

f

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

32

mesial aspect of mand 1st premolar

more occlusal surface visible than distal aspect

33

less curved CEJ

distal over mesial of mand 1st pre molar

34

in line with buccal cusp and apex

contact area of mandib 1st pre molar

35

mand 1st pre molar distal aspect

Contact area slightly broader than the mesial

36

Diamond shaped outline form

occlusal aspect of mand 1st pre molar

37

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

occlusal of mand 1st pre molar

38

distal outline more rounded and convex

than mesial outline of mand 1st premolar

39

convex with indentation 

Mesial outline of mand 1st pre molar

 

40

indentation of mand 1st pre molar

where ML groove is located;

41

Prominent line angles but rounded

occlusal of mand 1st pre molar

42

small lingual cusp

mand 1st pre molar

43

central grove of mand 1st pre molar

often not distinct

44

transverse ridge of

occlusal of mand 1st pre molar

45

tf only mesial fossa of mand 1st  pre molar visible

f

mesial and distal fossa

46

which marginal ridge is shorter on mand 1st pre molar

mesial or distal

mesial

47

both converge to lingual)

mesial and distal marginal ridge of mand 1st pre molar

48

ML groove visible

occlusal aspect of mand 1st pre molar

49

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

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

50

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

fall on straight line which is centered on the crown faciolingually

51

root of mand 1st pre molar

Wider buccolingually than mesiodistally

52

tf mand 1st pre molar is ovoid

(cross section)

t

53

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

---- -----

Single root tapering to sharp apex and pulp canal

54

mand 1st pre molar

Wider buccolingually than mesiodistally

55

sloped occlusal surface

mand 1st pre molar

56

mand 1st pre molar

can have two roots (one buccal and one lingual)

but usually only one root canal

57

ML developmetnal depression 

visible on Mand 1st pre molar

58

larger and similar to canine

mand P2

59

tf mand P2 is bell shape 

F

broader

60

shorter, less pointed and form obtuse angle 

buccal cusp of mand P2

61

tf mesial cusp is longer than distal cusp in mand P2

f

shorter

62

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

t

63

occlusocervically mesial crown of Mand P2 is 

longer than distal crown(mand P2)

64

shorter buccal cusp of mand P2

cause M&D contacts appear to be higher

65

smooth with indistinct conveixities or concavities

Mand P2 facial surface

66

conical with flattened facial surface

Mand P2 root (buccal)

67

blunt apex

root of Mand P2

68

Mand P2

CEJ straighter than teeth anterior to it

69

tf mand P2 is

Wider mesiodistally but

shorter occlusogingivally 

than MandP1

F

wider and longer

70

Mesial and distal crown outlines convex

mand P2

71

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

T

72

2 typs of cusps of mand P2

bucal 

ML

DL

73

Lingual cusp or cusps shorter

than buccal cusps of Mand P2

74

tf occlusal surface more visible in mand P2 than mand P1

F

Occlusal surface less visible than in P1

75

ML cusp is larger than DL cusp

in y type mand P2

76

smooth and convex

root of mand P2

77

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

F

tapers to the lingual less than P1

78

mesial aspect of mand P2

Crown and root wider buccolingually than madn P1

79

which buccal cusp is shorter

mand P1 or mand P2

Mand P2

80

B cusp tip slightly buccal to center of root

mand P2

81

higher lingual cusp occlusally

mand P2 or Mand P1

mand p2

82

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

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

83

tf mand P2 has ML developmental groove

F

lacks

84

CEJ less curved

Mand P1 or Mand P2

Mand P2

85

root apex blunted 

mand P1

or mand P2

mand P2

86

TF on mand P2 DL cusps are visible on mesial aspect

F

not visible on mesial aspect

87

Mand P2 lacks

transverse ridge; defined central groove

on mesial aspect

88

89

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

T

90

mand P2

---- crown outline with a ------ tilt

mand P2

Rhomboidal crown outline with a lingual tilt

91

tf on distal aspect of mand P2

Contact area larger and wider buccolingually than mesial aspect

T

92

distal aspect of mand P2

all cusp visible

Y-type P2

93

DL cusp smaller than ML cusp 

in Y-type P2

(distal aspect)

94

distal aspect mand P2

largest cusp

 buccal cusp

95

prominent triangular ridge

on buccal cusp of mand P2(distal view)

96

perpendicular to long axis

Distal marginal ridge of mand P2

97

mand P2 distal view

CEJ flattened and similar to what is seen on molars

98

square outline form

occlusal of mand P2(y type)

99

parralel to each other

 

mesial and distal aspects of mand P2(occlusaL)

100

Less prominent buccal ridge with less distinct developmental depressions

occlusal of mand P2

101

what is major grovve pattern of mand P2(occlusal)

Y

102

order the follwoing cusp in terms of size on mand P2

DL cusp

 ML cusp  

B cusp

B cusp > ML cusp > DL cusp

103

lingual grove separates 

2 lingual cusps of mand P2(occlusal)

104

tf lingual groove of mand P2 is mesial to center

F

distal to center

105

name type of pits of mand P2

Mesial and distal triangular fossae with pits

and central pits

106

• More rounded outline form than Y-type

H and U type Mand P2

107

tf

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

f

Mesial and distal profiles not as parallel

108

converge toward lingual

Mesial and distal profiles of H and U types

109

No lingual groove or central pit

H and U type Mand P2

110

tf

in mand P2 h and u types

Buccal cusp smaller than lingual cusp

F

Buccal cusp larger than lingual cusp

111

root of Mand P2

Single root with one pulp canal

112

tf mand P2 root Slightly wider buccolingually and longer than P1

T

113

root apex of mand P2

blunted

114

root apex of mand P2

incline distally

115

Rarely bifurcated of trifurcated root

mand P2 roots

116

round to ovoid cross section 

mand P2 cross section

117

slightly flattened buccal surface

mand P2(cross section)

118

cross section of mand P2

Slight taper to the lingual

119

Single root canal usually

mand p2