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structure basics > L7 MAND PREMOLARS > Flashcards

L7 MAND PREMOLARS Flashcards

1
Q

Numbers of mandibular left and right 1st premolars

A 
Left = 21 
Right = 28
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2
Q

Numbers of mandibular left and right 2nd premolars

A 
Left = 20
Right = 29
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3
Q

Do succedaneous or non succedaneous teeth replace primary molars

A

Succedaneous teeth

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4
Q

Mandibular first premolar develops from how many lobes

A

4 = 3 facial, 1 lingual

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5
Q

Mandibular second premolar develops from how many lobes

A

4 or 5 = 3 facial, 1 or 2 lingual

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6
Q

From buccal view of mandibular first premolar, what is iits shape

A

Trapezoidal

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7
Q

From buccal view of mandibular first premolar, the well developed middle buccal lobe becomes the prominent ____ ridge

A

Buccal ridge

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8
Q

From buccal view of mandibular first premolar, the buccal cusp resembles the mandibular _______ but the cusp tip is more _____

A

Resembles mand canine but the cusp is is more rounded

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9
Q

From buccal view of mandibular first premolar, the mesial slope of the buccal cusp is ______ than the distal slope of the buccal cusp

A

Shorter (this opposite of maxillary 1st PM, the ML is longer the DL)

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10
Q

From buccal view of mandibular first premolar, the mesial and distal outline are slightly ______

A

Slightly concave

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11
Q

From buccal view of mandibular first premolar, the M and D heights of contour are in the

A

Middle 1/3

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12
Q

From buccal view of mandibular first premolar, the cervix is much ______ mesiodistally than the crown width at contact areas

A

Much narrow MD

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13
Q

From buccal view of mandibular first premolar, the cervical line exhibits _____ curvature

A

Little curvature

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14
Q

From buccal view of mandibular first premolar, buccal surface is ______ especially at the cervical and middle 1/3

A

Convex

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15
Q

From buccal view of mandibular first premolar, the root length is ____ than the canine.

A

Root is shorter than canine

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16
Q

From buccal view of mandibular first premolar, the root curves in which direction

A

Curves distally

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17
Q

From lingual view of mandibular first premolar, crown and root taper toward the ________

A

Lingual

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18
Q

From lingual view of mandibular first premolar, the lingual cusp is small and may resemble the

A

Cingulum of a canine

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19
Q

From lingual view of mandibular first premolar, the occlusal surface slopes ____ in a _____ directions.

A

Slopes lingually in a cervical direction -visible from lingual view

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20
Q

From lingual view of mandibular first premolar, its smoothly _____ in all directions

A

Convex

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21
Q

From lingual view of mandibular first premolar, M and D outline are concave from where to where

A

Concave from cervical margin to contact areas

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22
Q

From lingual view of mandibular first premolar, what demarcates the lingual lobe from the mesiobuccal lobe

A

Mesiolingual developmental groove

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23
Q

From lingual view of mandibular first premolar, what separates the marginal ridge from the lingual cusp

A

Mesiolingual developmental groove

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24
Q

From lingual view of mandibular first premolar, the root tapers in which direction and what aspects are visible

A

Tapers lingually, mesial and distal aspects are visible

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25
Q

From lingual view of mandibular first premolar, the root tapers in to a point

A

Apex

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26
Q

From lingual view of mandibular first premolar, on the mesial side of the root what will you find

A

Developmental depressions/developmental grooves

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27
Q

From mesial view of mandibular first premolar, what is the outline

A

Rhomboidal

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28
Q

From mesial view of mandibular first premolar, the buccal outline is very

A

Curved/convex

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29
Q

From mesial view of mandibular first premolar, the buccal cusp tip located where in relation to the midline

A

Centered over the midline of the root

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30
Q

From mesial view of mandibular first premolar, the buccal height of contour is

A

At the junction of the middle and cervical 1/3

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31
Q

From mesial view of mandibular first premolar, the lingual outline is less

A

Convex

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32
Q

From mesial view of mandibular first premolar, the lingual height of contour is in

A

The middle 1/3 of the crown height

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33
Q

From mesial view of mandibular first premolar, the lingual height of contour is ______ to the outline of the root

A

Lingual (overhangs root trunk)

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34
Q

From mesial view of mandibular first premolar, lingual cusp tip on a line with the

A

Lingual border of the root

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35
Q

From mesial view of mandibular first premolar, the distance from the CEJ to the lingual cusp tip is ____ distance from the CEJ to the buccal cusp tip

A

2/3 distance

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36
Q

From mesial view of mandibular first premolar, mesial marginal ridge slopes

A

Cervical from buccal to lingual

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37
Q

From mesial view of mandibular first premolar, mesiolingual development groove separates

A

Mesiobuccal lobe from the lingual lobe

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38
Q

From mesial view of mandibular first premolar, cervical line curves _____

A

Occlusally

39
Q

From mesial view of mandibular first premolar, the mesial surface is smoothly ____ except for ___

A

Smoothly convex, except for the mesiolingual developmental groove

40
Q

From mesial view of mandibular first premolar, root outline is tapered to a pointed

A

Apex

41
Q

From mesial view of mandibular first premolar, what cane be found of the surface of the root

A

Deep developmental - depression groove

42
Q

Explain the height relationship of the mesial and distal marginal ridges of the mandibular first premolar

A

The distal marginal ridge is higher above the CEJ than the mesial marginal ridge

43
Q

What is the only tooth in which the mesial marginal ridge is at a lower level than he distal marginal ridge

A

The mandibular first premolar

44
Q

From distal view of mandibular first premolar, distal marginal ridges are at what angle to the long axis of the tooth

A

Almost at right angles to the long axi

45
Q

From distal view of mandibular first premolar, is smoothly convex but may have a concaviity where

A

Above the cervical extending buccolingually

46
Q

From distal view of mandibular first premolar, the distal contact is ______ than mesial

A

Broader

47
Q

From distal view of mandibular first premolar, distal height of contour is in

A

Middle 1/3

48
Q

From distal view of mandibular first premolar, will the cervical curvature is going to be less, more, or similar to the mesial curvature

A

Less or similar

49
Q

From distal view of mandibular first premolar, the root is more ____ than mesial and less _____

A

More convex and less grooved (they have shallow deep depressions but no deep groove)

50
Q

From occlusal view of mandibular first premolar, what iis its outline

A

Diamond

51
Q

From occlusal view of mandibular first premolar, what ridge and cusp are very pronounced

A

Buccal cusp and ridge

52
Q

From occlusal view of mandibular first premolar, what is the size of the lingual cusp

A

Small

53
Q

From occlusal view of mandibular first premolar, the mesiobuccal cusp ridge is _____ than Seth distobuccal cusp ridge

A

MB shorter than DB

54
Q

From occlusal view of mandibular first premolar, the crown is wider ______ than _______

A

Wider buccally than lingually

55
Q

From occlusal view of mandibular first premolar, what converges to form a small lingual cusp

A

Mesial and distal marginal ridges that are well develop

56
Q

From occlusal view of mandibular first premolar, MB and DB line angles are prominent and what shape

A

Rounded

57
Q

From occlusal view of mandibular first premolar, mesial and distal contacts are centered _____

A

Buccolingually

58
Q

From occlusal view of mandibular first premolar, the buccal and lingual triangular ridges join together to for a single ridge called the

A

Transverse ridge

59
Q

From occlusal view of mandibular first premolar, is the buccal or lingual triangular ridge larger

A

Buccal triangular ridge is larger

60
Q

From occlusal view of mandibular first premolar, cusps are separated by a ______ groove

A

Central groove like in maxillary premolars

61
Q

From occlusal view of mandibular first premolar, the transverse ridge separates what two things

A

Mesial occlusal fossa from the distal occlusal fossa

Occlusal = triangular !

62
Q

From occlusal view of mandibular first premolar, which occlusal (triangular) fossa is larger, mesial or distal

A

Distal occlusal fossa is larger

63
Q

From occlusal view of mandibular first premolar, what separates the mesial marginal ridge from the lingual cusp

A

Mesiolingual developmental groove

64
Q

How many roots on a mandibular first premolar

A

Single root

65
Q

What is the shape of the root of a mandibular 1st premolar

A

Rounded

66
Q

Which direction does the root of a mandibular 1st premolar curve

A

Curves distally

67
Q

The root of a mandibular 1st premolar is grooved _______ on the mesial and distal surface-which is more marked

A

Grooved longitudinally. Mesial is more marked

68
Q

How many cusps types can an mandibular second premolar have

A

Three cusp = 5 lobes

Two cusp = 4 lobes

69
Q

From buccal view of mandibular second premolar, the buccal cusp is ______ and _____ pointed than the cusp of the first premolar

A

Buccal cusp is short and less pointed

70
Q

From buccal view of mandibular second premolar, mesial and distal contacts appear higher on the crown due to the

A

Smaller buccal cusp

71
Q

From buccal view of mandibular second premolar, what are the mesial and distal contact points

A

Middle 1/3

72
Q

From buccal view of mandibular second premolar, the root is _______ mesiodistally compare to mandibular first pre molar

A

Broader mesiodistally

73
Q

From buccal view of mandibular second premolar, the root apex is ______ blunt compared to the mandibular 1st premolar

A

Apex is more blunt

74
Q

From lingual view of mandibular second premolar, the lingual lobes are _____ developed than mand 1st PM

A

Better devloped

75
Q

From lingual view of mandibular second premolar, more or less of the occlusal surface is visible compared the mand 1st PM

A

Less of the occlusal surface is visible

76
Q

From lingual view of mandibular second premolar, in the 3 cusp type, the two ML and DL cusps are separated by

A

Lingual groove

77
Q

From lingual view of mandibular second premolar,the root is _____ mesiodistally

A

Wide MD but not as wide as buccal aspect

78
Q

From mesial view of mandibular second premolar, crown and root are ____ buccolingually compared to mandibular 1st PM

A

Wider BL

79
Q

From mesial view of mandibular second premolar, buccal cusp tip is or isn’t lingually placed

A

Isn’t lingually place, differs from Mand 1 PM

80
Q

From mesial view of mandibular second premolar, the buccal cusper is ____ than seen in Mand 1st PM

A

Shorter

81
Q

From mesial view of mandibular second premolar, compared to the man 1st PM, lingual and buccal cusp are more ______ in size

A

More equal in size

82
Q

From mesial view of mandibular second premolar, the mesial marginal ridge is at what angel to the long axis of the tooth

A

Right angle

83
Q

From mesial view of mandibular second premolar, is there a mesiolingual developmental groove present

A

No

84
Q

From mesial view of mandibular second premolar, is the root longer or shorter than Mand 1 PM

A

Longer and the apex is more blunt

85
Q

From distal view of mandibular second premolar, why is more of the occlusal surface visible from this view

A

Because the distal marginal ridge is at a lower level

86
Q

From occlusal view (3 cusp type) of mandibular second premolar, describe the shape

A

Square in shape

87
Q

From occlusal view (3 cusp type) of mandibular second premolar, has two lingual cusp and one buccal, list them from largest to smallest

A

Buccal > mesiolingual > distolingual

88
Q

From occlusal view (3 cusp type) of mandibular second premolar, developmental grooves separates the cusps forming a _____ shape on the occlusal surface

A

Y have = mesial, distal, and lingual developmental grooves

89
Q

From occlusal view (3 cusp type) of mandibular second premolar, what is the name of the pit the Y shaped grooves create

A

Central pit

90
Q

From occlusal view (2 cusp type) of mandibular second premolar, have ____ shaped developmental grooves

A

H and U shaped

91
Q

From occlusal view (2 cusp type) of mandibular second premolar, what is the outline shape

A

Rounded

92
Q

From occlusal view (2 cusp type) of mandibular second premolar, the mesial and distal marginal ridges converges in what direction

A

Lingually

93
Q

From occlusal view (2 cusp type) of mandibular second premolar, is the lingual cusp under or well developed

A

Well developed

94
Q

From occlusal view (2 cusp type) of mandibular second premolar, to they have mesial and distal pits where the grooves connect

A

May or may not

structure basics (18 decks)

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