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structure basics > Maxillary Molars > Flashcards

Maxillary Molars Flashcards

1
Q

Which max molar is the largest crown height and diameter?

A

1st molar

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2
Q

Crown height and MD crown diameter of maxillary molars ______ from 1st to third molars

A

decrease

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3
Q

How many lingual roots does the max 1st molar have?

A

1

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4
Q

Which root is the largest on the max 1st molar?

A

lingual root

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5
Q

How many buccal roots does 1st max molar have?

A

2

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6
Q

Which cusp is the largest cusp of the max molars?

A

Mesiolingual cusp

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7
Q

How many cusps does the 2nd and 3rd molars have?

A

4

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8
Q

How many cusps does the 1st molar have?

A

5

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9
Q

ML, MB and DB cusps form

A

trigon or primary cusp triangle

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10
Q

DL cusp is the smallest and _____ in size from 1st to 3rd molar

A

decreases

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11
Q

Which cusps make up the trigon on max molars?

A

ML, MB, and DB

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12
Q

Are the crowns on max molars broader M-D or F-L?

A

B-L

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13
Q

DB cusp is connected to the ML cusp of max molars by an _____

A

OBLIQUE RIDGE

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14
Q

What cusps of max molar are connected by oblique ridge?

A

DB and ML

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15
Q

Crown outline of max 1st molar from buccal view

A

trapezoidal

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16
Q

Distal profile from buccal is ___

A

Convex

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17
Q

Mesial profile from buccal is ___

A

Convex and flat

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18
Q

Which cusp is larger on max 1st molar: MB or DB?

A

MB

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19
Q

MB and DB cusps on 1st max molar separated by ______

A

Buccal Developmental Groove

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20
Q

Which cusp is more pointed on max 1st molar: MB and DB?

A

DB

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21
Q

Mesial and Distal contacts (mesial and distal heights of contour) of max 1st molar located in the

A

middle 1/3

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22
Q

Where is the concavity on 1st max molar that can complicate restoring the tooth and make it difficult to remove calculus?

A

cervical of DB cusp

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23
Q

(1st max molar root) straight, curves distally; apex in line with MB cusp tip

A

Mesiobuccal

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24
Q

(1st max molar root) the longest; in line with the buccal groove

A

Lingual/Palatal

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25
Q

(1st max molar root) the smallest;distal inclination, then mesial

A

Distobuccal

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26
Q

How many roots of 1st max molar ae visible from buccal view?

A

all 3

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27
Q

Roots of 1st max molar are _____ as long as crown

A

2x

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28
Q

Root trunk of 1st max molar is how much of the length of root from buccal?

A

1/3

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29
Q

Which root has 2 canals on 1st max molar?

A

MB

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30
Q

Which cusps are visible from the buccal view of 1st max molar?

A

All 4 major cusps

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31
Q

Which cusps are visible from lingual view of 1st max molar?

A

DL and ML (major) and cusp of carabelli

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32
Q

ML and DL cusps are separated by _____ which ends in the middle of the lingual surface

A

lingual groove

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33
Q

ML cusp of max 1st molar makes up how much of the total width of the tooth?

A

3/5

34
Q

Which cusp of 1st max molar does the cusp of carabelli reside?

A

ML

35
Q

How. many roots visible 1st max molar from lingula view?

A

3

36
Q

T/F: 1st max molar Shallow depression on lingual aspect from the terminus of the lingual groove extending to the middle 1/3 of the root

A

True

37
Q

Which cusps of 1st max molar are visible from mesial view?

A

ML, MB, and cusp of carabelli

38
Q

Where is the max B-L width of max 1st molar?

A

cervix

39
Q

Buccal height of contour of 1st max molar

A

cervical 1/3

40
Q

lingual height of contour of 1st max molar

A

Middle 1/3

41
Q

Mesial contact area of max 1st molar in the ______, and offset to the _______

A

middle 1/3; buccal

42
Q

Which roots are visible from mesial aspect of max 1st molar?

A

Lingual and MB

43
Q

Crown of max 1st molar constricts toward ____

A

distal

44
Q

How many cusps of max 1st molar are visible from distal?

A

4 major cusps

45
Q

How many roots of max 1st molar are visible from distal?

A

3

46
Q

1st max molar Distal contact area is in the _____, and offset to the _____

A

middle 1/3; buccal

47
Q

Occlusal outline of 1st max molar

A

rhomboidal

48
Q

Which cusps of 1st max molar form acute angles?

A

MB and DL

49
Q

Which cusps of 1st max molar form obtuse angles?

A

ML and DB

50
Q

From the occlusal aspect of 1st max molar crown is ____ B-L than M-D

A

wider

51
Q

MD width of 1st max molar is greater on the ____ side

A

lingual

52
Q

What are the cusps sizes from largest to smallest on 1st max molar?

A

ML> MB > DB > DL > cusp of carabelli

53
Q

How many major fossae does the 1st max molar have?

A

2

54
Q

____ of 1st max molar lies in center of the trigon mesial to the oblique ridge, roughly triangular

A

Central fossa

55
Q

_____ of 1st max molar lies distal to oblique ridge, roughly linear

A

Distal Fossa

56
Q

How many minor fossae does the 1st max molar have?

A

2

57
Q

____ of 1st max molar is at junction of Central Developmental Groove, Buccal Groove, Transverse groove of the oblique ridge

A

Central Pit

58
Q

____ of 1st max molar is at junction of Distal oblique groove, Lingual groove

A

Distal Pit

59
Q

root divides into three roots

A

Trifurcation

60
Q

What are the levels of furcation of the 3 roots of 1st max molar from longest to shortest?

A

Distal, buccal, and mesial

61
Q

What are the 2 occlusal shapes of the 2nd max molar?

A

Rhomboidal or heart shaped

62
Q

Roots of 2nd molar are _____, and more ____ inclined compared to 1st Molar

A

as long or longer; distally

63
Q

___ root apex is in line with buccal groove in 2nd max molar

A

MB

64
Q

The apex of lingual root lines-up with ______ in 2nd max molar (vs. lingual groove in Maxillary 1st)

A

DL cusp tip

65
Q

Roots are more splayed in which max omlar?

A

1st max molar

66
Q

T/F: 2nd max molar roots don’t diverge as much and are confined with crown width

A

True

67
Q

Contact area on distal and mesial of 2nd max molar is in _____ and offset to ___

A

middle 1/3; buccal

68
Q

How many roots are visible from distal of 2nd max molar?

A

3

69
Q

2nd max molar constricts toward ____ and converges toward _____

A

distal; lingual

70
Q

If 2nd max molar is heart shaped, which cusp is absent?

A

DL

71
Q

All roots of 2nd max molar exhibit ____ angulation

A

Distal

72
Q

___ is the most variable tooth anatomy in the dentition

A

Max 3rd molar

73
Q

Smaller M-D and cervico-occlusally, less developed than maxillary 2nd Molar, May resemble maxillary 1st or 2nd Molar, DL cusp poorly developed or absent, One lingual cusp usually, heart shaped occlusal, Roots are shorter and usually fused on the ______ max molar

A

3rd

74
Q

When does Max 1st molar erupt?

A

6 yrs

75
Q

When does Max 2nd molar erupt?

A

12

76
Q

When does Max 3rd molar erupt?

A

17+

77
Q

When does 1st max molar initiate calcification?

A

Birth

78
Q

When does 2nd max molar initiate calcification?

A

2 1/2 yrs

79
Q

When is 1st max molar crown completed?

A

3-4 yrs

80
Q

When is 2nd max molar crown completed?

A

7-8 yrs

81
Q

When are 1st max molar roots completed?

A

9-10 yrs

82
Q

When are 2nd max molar roots completed?

A

14-16 yrs

structure basics (18 decks)

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