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Dent Anat > Unit 5-Permanent Pre molars > Flashcards

Unit 5-Permanent Pre molars Flashcards

1
Q

succedaneous teeth

A

different name than the teeth they replace

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2
Q

number facial cusps

A

1

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3
Q

lingual cusps

A

0-2

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4
Q

maxillary 1st size vs max 2nd

A

max 1st> (BUT mand 2nd > Mand 1st)

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5
Q

wider in which direction

A

buccolingually (than m-d)

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6
Q

mandibular crown dimensions (shape)

A

square

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7
Q

compare cusps of Max vs cusps mandibulars

A

cusps of max are equal in size-teeth more symmetrical- whereas on mand lingual are smaller

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8
Q

max proximal view of root inclination

A

none-root centered

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9
Q

mandibular proximal view of root inclination

A

to lingual

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10
Q

smaller crown on max 1st and second

A

2nd, also more rounded

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11
Q

1st max premolar replaces

A

decidious max 1st molar

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12
Q

max 2nd premolar replaces

A

decidious maxillary second molar

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13
Q

shape of both these teeth from buccal

A

pentagonal

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14
Q

height compared to rest of teeth (occlusocervical)

A

tallest post, shorter than anteriors though

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15
Q

mesio occlusal angle from buccal view of max 1st and max 2nd

A

obtuse angle

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16
Q

mesial margin of max 1st premolar from contact to cej (and max 2nd)

A

(shallowly) concave- max 2nd less concave

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17
Q

Mesial crest of curvature/contact of max 1st and max 2nd from buccal

A

middle 1/3 and occlusal junction

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18
Q

distal crest of curvature on max 1st and 2nd compared to mesial

A

slightly more cervical

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19
Q

Mesio-occlusal slope of Max 1st (and max 2nd)

A

longer and straighter (on 2nd it is opposite!!!!!-shorter/sloped)

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20
Q

disto-occlusal slope of max 1st (and max 2nd)

A

shorter and more curved on 1st (longer and straight on 2nds)

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21
Q

cusp straight on max 1st from buccal?

A

no, offset to distal on max 1st

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22
Q

CEJ curvature

A

towards apex (curves up towards tip of root)

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23
Q

the surface of buccal

A

buccal ridge from buccal cusp to CEJ and mesiobuccal and distobuccal development- with imbrication lines

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24
Q

buccal height of contour location

A

in the cervical third

25
Q

cusp straight on max 2nd from buccal?

A

no, offset mesial on max 2nd

26
Q

lingual surfaces of both

A

smooth, convex; NO defined lingual ridge

27
Q

lingual ridge?

A

NO

28
Q

buccal ridge?

A

YES!– large with developmental depressions and imbrication lines

29
Q

lingual cusp of both teeth (and compare to buccal cusp)

A

offset mesially-less on max 2nd;

both are shorter and less pointed than buccal cusp

30
Q

lingual cusp heights-and compare between 1st and second max

A

lingual cusp is shorter than buccal on both-BUT the max 2nd is considerably longer –> less occlusal is visible

31
Q

mesio-occlusal slope vs d-o on lingual surface

A

m-o < d-o

32
Q

developmental depressions on lingual? Grooves? Pits?

A

NO-smooth and convex

33
Q

lingual height of contour

A

middle third

34
Q

buccal and lingual heights of contour

A

buccal is middle 1/3-occlusal junction and lingual is middle third

35
Q

shape from mesial view

A

trapezoidal-longer base is at cervical

36
Q

buccal margin (from mesial)

A

convex

37
Q

lingual margin (from mesial)

A

even arc

38
Q

buccal height of contour

A

cervical third

39
Q

lingual height of contour

A

middle third

40
Q

buccal and lingual heights of contour

A

buccal is cervical and lingual is middle third

41
Q

marginal ridge/height of contour of lingual and contacts

A

1st max: middle third

2nd max: both more cervical

42
Q

occlusal margin? (what does the line between the buccal and lingual cusp look like?)

A

irregular concave

43
Q

mesial surface of both teeth

A

mesial marginal ridge, mesial marginal groove, and mesial concavity on max 1st

Max 2nd lacks mesial concavity and groove

44
Q

CEJ from mesial

A

irregular convex towards occlusal

45
Q

location of mesial concavity

A

max 1st only; found in middle of cervical 3rd

46
Q

mesial height of contour/contact area, in middle?

A

at junction of middle and occlusal thirds-offest to buccal (NOTE; mand is slightly more cervical)

47
Q

shape of mesial contact

A

circle

48
Q

distal is wider in which direction

A

mesio-distally than occlusal-cervically

49
Q

Buccal margin from distal and crest of curvature

A

convex- in gingival 1/3

50
Q

lingual margin from distal and crest of curvature

A

symmetrical and convex; in middle 1/3

51
Q

location of occlusal marginal ridge from distal

A

more cervical, so more of occlusal surface is visible

52
Q

more occlusal surface visible from?

A

distal, occlusal marginal ridge is more cervical

53
Q

marginal groove on distal of max 1st?

A

NO

54
Q

CEJ of distal

A

still occlusally, less than mesial

55
Q

Contact area of distal

A

larger, still at middle and occlusal 1/3 junction but more cervical-ovoid (larger in max 2nd and more cervical)

56
Q

shape of distal contact

A

ovoid

57
Q

shape of outlines of distal

A

Convex in all directions

58
Q

concavity present in distal?

A

no, may be flattened

59
Q

Shape of occlusal and width

A

hexagonal (wider b-l)

Dent Anat (7 decks)

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