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Dental Anatomy > Molars > Flashcards

Molars Flashcards

1
Q

(True for all molars) Molar crowns are wider in which direction?

A

wider mesiodistally than occlusocervically

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2
Q

(True for all molars) Crown height on the mesial is ____ than on the distal

A

longer

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3
Q

Occlusally, crowns taper (get narrower) from the _____ to the _____, and from the _____ to the ____

A

buccal to the lingual & mesial to distal

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4
Q

Exception: Some ______ may taper from lingual to buccal.

A

maxillary 1st molars

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5
Q

(True for all molars) When viewed from what surface is much of the occlusal surface as well as the facial and lingual surfaces seen?

A

distal

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6
Q

(True for all molars) the buccal crest of curvature (height of contour) is in what third?

A

cervical third

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7
Q

(True for all molars) the lingual crest of curvature (height of contour) is in what third?

A

middle third

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8
Q

(True for all molars) the mesial proximal contact is at/near the junction of what two thirds?

A

junction of the occlusal and middle thirds

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9
Q

(True for all molars) the distal proximal contacts are where?

A

more cervical in the middle third

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10
Q

(True for all molars) Proximal contacts are ____ to the midpoint of the inter proximal surface.

A

buccal

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11
Q

(True for all molars) MB & DB roots are wider in which direction?

A

wider buccolingually than mesiodistally

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12
Q

(True for all MAXILLARY molars) Palatal root is wider in which direction?

A

mesiodistally than buccolingually

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13
Q

What is the widest tooth in the mouth buccolingually?

A

1st maxillary molar

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14
Q

What is the widest tooth in the mouth mesiodistally?

A

1st mandibular molar

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15
Q

Which molars are wider buccolingually and have a square or rhomboid shaped occlusal?

A

maxillary molars

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16
Q

Which molars are wider mesiodistally and have a rectangular or pentagonal shaped occlusal?

A

mandibular molars

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17
Q

Which molars can have 4-5 cusps?

A

mandibular molars

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18
Q

What is the order of cusp size of the maxillary molars?

A

ML > MB > DB > DL

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19
Q

What is the order of cusp size of the mandibular first molars?

A

MB > ML > DL > DB > D

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20
Q

What is the order of cusp size of the mandibular second molars?

A

MB = DB > ML > DL

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21
Q

Maxillary molars have 3 roots, which is the longest?

A

lingual root

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22
Q

Which maxillary molar root is the shortest?

A

distobuccal

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23
Q

Mandibular molars usually have 2 roots, mesial and buccal, which is the longest?

A

mesial root

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24
Q

From the buccal view of maxillary molars which cusps are visible?

A

only buccal cusps

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25
Q

From the buccal view of mandibular molars which cusps are visible?

A

all cusps are visible

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26
Q

(True for all molars) which buccal cusps are longer, mesial or distal?

A

mesial

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27
Q

In the maxillary molars which cusps are more pointed, the buccal or lingual?

A

buccal

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28
Q

In mandibular molars which cusps are more pointed, the buccal or the lingual?

A

lingual

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29
Q

From the lingual view of maxillary molars which cusps are visible?

A

all cusps are visible

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30
Q

From the lingual view of mandibular molars which cusps are visible?

A

only lingual cusps are visible

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31
Q

_______ cervical line of all maxillary molars has concavity. This anatomical feature (1) picks up calculus & (2) is difficult to restore.

A

distobuccal cervical line

32
Q

In which arch are the crowns of the molars aligned directly over the roots?

A

Maxillary molars

33
Q

In which arch are the crowns of the molars tilted lingually at the cervix?

A

Mandibular molars

34
Q

In maxillary molars which cusps are longer, buccal or lingual?

A

buccal cusps

35
Q

In mandibular molars which cusps are longer, buccal or lingual?

A

lingual cusps

36
Q

In which arch is the oblique ridge running distobuccal to mesiolingual?

A

maxillary

37
Q

In which are are there two transverse ridges running directly buccolingually?

A

mandibular

38
Q

In which molar does the MB root tip line up the the MB cusp?

A

maxillary 1st molar

39
Q

In which molar does the MB root tip typically not line up with the MB cusp?

A

maxillary 2nd molar

40
Q

In which molar does the DB root tip typically line up with the DB cusp?

A

maxillary 1st molar

41
Q

In which molar does the DB root tip typically not line up with the DB cusp?

A

maxillary 2nd molar

42
Q

In the maxillary 1st molar the palatal root tip lines up with what?

A

buccal groove

43
Q

Which tooth is more likely to have a 5th cusp (cusp of Carabelli on the ML cusp?

A

maxillary 1st molar

44
Q

Which tooth is the only tooth with a lingual concavity on the root?

A

maxillary 1st molar

45
Q

Which cusp in the maxillary 2nd molar is more nearly centered?

A

ML cusp

46
Q

Which of the maxillary molars has more secondary grooves?

A

Maxillary 2nd molar

47
Q

Which Maxillary 1st molar root may have 2 canals?

A

mesial

48
Q

How many cusps does the mandibular 1st molar have?

A

5 cusps (3 buccal, 2 lingual)

49
Q

How many cusps does the mandibular 2nd molar have?

A

4 cusps

50
Q

What is the size order of the mandibular 1st molar cusps?

A

MB>ML>DL>DB>D

51
Q

What is the size order of the mandibular 2nd molar cusps?

A

MB>ML>DB>DL

52
Q

What is the order of the height of the mandibular 1st molar cusps?

A

ML>DL>MB>DB>D

53
Q

What is the order of the height of the mandibular 2nd molar cusps?

A

ML>DL>MB>DM

54
Q

What is the first permanent tooth to erupt?

A

mandibular 1st molar

55
Q

On the mandibular 1st molar which of the 2 developmental grooves on the buccal is shorter?

A

Mesiobuccal developmental groove is shorter

56
Q

On the mandibular 1st molar the MB groove terminates in a ____?

A

buccal pit

57
Q

Which tooth has the largest MD crown dimension of any tooth?

A

Mandibular 1st molar

58
Q

What is the longest root of any molar?

A

mesial root of the mandibular 1st molar

59
Q

Mandibular 1st molar roots are inclined _____

A

distally

60
Q

The mandibular 1st molar has more tapering from the distal proximal contact to the cervical line due to the presence of…

A

distal cusp

61
Q

in the Mandibular molars which cusps are taller?

A

Mesial & Lingual

62
Q

Which tooth has the largest crown dimension buccolingually of any mandibular tooth?

A

Mandibular 1st molar

63
Q

Looking from the mesial which mandibular root is visible ?

A

Only the mesial root is visible since it is wider and longer than the distal root.

64
Q

Root canals in the mesial root of this molar are more divergent (widely separated)

A

mandibular 1st molar

65
Q

Root canals in the mesial root of this molar are more parallel (closer together)

A

Mandibular 2nd molar

66
Q

The mesial root of the mandibular molars has significant depression(s) on the …

A

mesial and distal sides of the mesial root

67
Q

Central groove pattern is “zigzag”

A

Mandibular 1st molar

68
Q

Occlusal groove pattern forms a “cross”

A

Mandibular 2nd molar

69
Q

The central groove of the mandibular molars is located slightly to the ….

A

lingual

70
Q

Mandibular molars have lingual ______ of the crown on the occlusal surface.

A

convergence

71
Q

Mesial root of mandibular molars has how many pulp canals?

A

2

72
Q

How many cusps does the maxillary 3rd molar have?

A

3; MB>DB

73
Q

What is the shape of the occlusal surface of the maxillary 3rd molar?

A

heart shaped

74
Q

Describe the roots of the 3rd molars

A

Roots are closer, or fused, and curved to the distal

75
Q

How many cusps does the mandibular 3rd molar have?

A

4-5 cusps

76
Q

What is the shape of the occlusal groove pattern?

A

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Dental Anatomy (4 decks)

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