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structure basics > Mandibular Molars > Flashcards

Mandibular Molars Flashcards

1
Q

How many cusps are in mand 1st molar?

A

5

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2
Q

How many cusps are in mand 2nd molar?

A

4

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3
Q

Mand molars are broader ______ than _____

A

M-D than B-L

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4
Q

The Crown height, root length, MD diameter, and BL diameter of mand molars _____ from 1st to 3rd

A

decrease

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5
Q

Posterior teeth are wider or longer?

A

Wider

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6
Q

Anterior teeth are wider or longer

A

Longer

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7
Q

What are the 5 cusps of 1st mand molar?

A

MB, DB, ML, DL, and distal

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8
Q

How many roots does 1st mand molar?

A

2

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9
Q

Roots of mand molar are broad in which dimension?

A

B-L

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10
Q

Which direction do roots of 1st mand molar point/curve?

A

Distally

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11
Q

How many cusps of mand 1st molar are visible from buccal view?

A

All 5

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12
Q

What is the shape of buccal aspect of 1st mand molar?

A

Trapezoidal

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13
Q

What are the sizes of buccal cusps of 1st mand molar from largest to smallest?

A

MB > DB > Distal

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14
Q

What are the 2 grooves of the buccal aspect of 1st mand molar?

A

MB developmental groove and DB developmental groove

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15
Q

(mand 1st molar) Groove in btwn MB and DB cusp that is shorter and terminates in middle third of tooth

A

MB developmental groove

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16
Q

(mand 1st molar) Groove in btwn distal and DB cusp terminates in cervical 1/3

A

DB developmental groove

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17
Q

Where are heights of contour for 1st mand molar

A

Middle 1/3

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18
Q

Cervical line from buccal aspect of 1st mand molar curves

A

apically

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19
Q

Mesial outline of 1st mand molar from buccal view is _____

A

convex and concave

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20
Q

Distal outline of 1st mand molar from buccal view is _____

A

convex and straight

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21
Q

___ root of 1st mand molar has 2 canals and is straight and curves distally to a tapered apex

A

Mesial

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22
Q

___ root of 1st mand molar has 1 canal and points distally to a more tapered apex canal

A

Distal

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23
Q

Roots of 1st mand molar are _____ on buccal than lingual

A

wider M-D

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24
Q

Root trunk of 1st mand molar is ____ on buccal side than lingual side

A

shorter

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25
Q

How many cusps of 1st mand molar are visible from lingual view?

A

3: ML, DL, and Distal

26
Q

____ bisects the ML and DL cusp of 1st mand molar

A

lingual developmental groove

27
Q

Bifurcation of 1st mand molar is in line with _____

A

Lingual Dev. Groove

28
Q

From the mesial aspect, the 1st mand molar is ___ in outline

A

rhomboidal

29
Q

Which cusps of 1st mand molar are visible from mesial aspect?

A

MB and ML

30
Q

Which root of 1st mand molar is visible from the mesial aspect?

A

Mesial

31
Q

Buccal height of contour of 1st mand molar

A

cervical 1/3

32
Q

Crown of mand PM and Molars tilt ____ to root axis

A

lingual

33
Q

Lingual height of contour of 1st mand molar in

A

middle 1/3

34
Q

Cervical line is higher lingually than buccally from mesial aspect in which tooth?

A

1st mand molar

35
Q

There is a Slight ____ developmental depression on root of 1st mand molar

A

mesial

36
Q

Cervical line curves ____ from mesial aspect of 1st mand molar

A

occlusally

37
Q

Root apex of 1st mand molar lies under ____ cusp

A

MB

38
Q

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

A

2

39
Q

Distal marginal ridge of 1st mand molar is ____ (shorter or longer) and dips ____

A

shorter; cervically

40
Q

What is the shape of 1st mand molar from occlusal aspect?

A

Hexagonal

41
Q

Crown is 1st mand molar is wider _____ (buccally or lingually) and ____ (mesially or distally)

A

buccally and mesially

42
Q

What are the size of cusps of 1st mand molar from largest to smallest?

A

MB > ML ≥ DL > DB > D

43
Q

How many major fossae does 1st mand molar?

A

1

44
Q

How many minor fossae does 1st mand molar have

A

2

45
Q

___ fossa is Circular and Centrally placed between cusp ridges (major fossa)

A

Central Fossa

46
Q

What are the 2 minor fossae of 1st mand molar?

A

Mesial triangular fossa & Distal triangular fossa

47
Q

Distal slope of MB cusp, Mesial and distal slopes of DB cusp, Mesial slope of D cusp, Distal slope of ML cusp, Mesial slope of DL cusp, and Triangular ridges of the MB, D, DL and ML cusps are boundaries of ___ of 1st mand molar

A

Central fossa

48
Q

How many cusps does 2nd mand molar have?

A

4

49
Q

How many roots does 2nd mand molar have?

A

2

50
Q

How many cusps visible from buccal aspect of 2nd mand molar?

A

4

51
Q

_______ separates the two buccal cusps of 2nd mand molar

A

Buccal developmental groove

52
Q

Where are the mesial and distal contacts of 2nd mand molar?

A

middle 1/3

53
Q

Cervical line from buccal aspect of 2nd mand molar points

A

toward bifurcation

54
Q

Mesial root of 2nd mand molar is more ____ at apex than 1st

A

pointed

55
Q

Is the cervical line more curved from mesial aspect in mand 2nd molar or 1st?

A

1st mand molar

56
Q

Mand 2nd molar distal contact is ______ B-L

A

centered

57
Q

T/F: In mand 2nd molar, all cusps are same size

A

True

58
Q

What are the 3 grooves on occlusal surface of 2nd mand molar?

A

Central, lingual, and buccal groove

59
Q

What is the shape of 2nd mand molar from occlusal aspect?

A

Rectangular

60
Q

Most max 3rd molars have ___ crowns

A

oversized crowns

61
Q

Most mand 3rd molars have ____ crowns

A

undersized crowns

structure basics (18 decks)

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