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DAM 1001 > Molars > Flashcards

Molars Flashcards

1
Q

What are the molar Numbers?

A

1,2,3 and 14,15,16 and 17,18,19 and 30,31,32

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2
Q

the only teeth with no tooth in proximal contact with the distal surface

A

3rd Molars

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3
Q

What are quadrant width of max and mandibular molars?

A

Max= 44% of quadrant
Mand= 51% of quadrant

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4
Q

What are the 4 functions of molars?

A
  1. Mastication
  2. Maintain vertical dimension of face
  3. Maintain continuity within dental arch
  4. Keeps cheeks full
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5
Q

What happens to the face if molars are missing?

A

Suken face look+ anteiror teeth flare out

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6
Q

What can result as the loss of a mandibular 1st molar?

A
  • Hole
  • Super eruption of the oposing maxillary 1st molar
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7
Q

What can result as the loss of a maxillary 1st molar?

A
  • Hole
  • Tipping and imigration of posteior teeth to feel the space
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8
Q

Largest tooth in the mouth, 80mm2 of chewing surface

A

1st molars

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9
Q

the relationship between the maxillary and mandibular teeth when they approach each other.

Teeth to teeth relationship

A

Occlusion

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10
Q

Explain crown size trend on molars?

A
  1. Larger MD than BL
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11
Q

Explain the trend of buccal to lingual size trend of molars, what is the exception?

A

All molars taper from buccal to lingual in size, EXCEPT maxillary 1st molar with large DL cusp.

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12
Q

Explain the trend of mesial to distal sze trend of molars

A

Taper smaller mesial to distal from an occlusal view

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13
Q

Explain the trend of mesial to distal height of molars

Buccal View

A

Taper shorter from mesial to distal.
Mesial cusp taller.

Buccal View

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14
Q

Explain the height of contour for most molars?

A

Buccal crest of contour is at cervical 3rd, lingual crest of contour is in the middle 3rd.

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15
Q

Explain contact locations on molars?

A
  • Mesial contact= occlusal 3rd
  • Distal contact=middle 3rd
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16
Q

What is the crown outline of maxillary molars?

A

Wider FL, Square/rhomboid shape

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17
Q

What is the crown outline of mandibular molars?

A

Wider MD, rectangle

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18
Q

What molars have an oblique ridge from the ML to the DB cusp?

A

Maxillary Molars

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19
Q

What molars have cross like shape central groove?

A

Mandibular Molars

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20
Q

How many cusps do maxillary molars have?

A

3-5 Cusps
* DL cusps can be missing sometimes on 2nd maxillary molars.
* Cusp of carabellie can be present on ML of 1st maxillary molar.

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21
Q

How many cusps do mandibular molars have?

A

4-5 Cusps
* 1st molars can have a 5th DB cusp
* 2nd molars always have 4 cusps

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22
Q

Explain crown tilt in molars?

A

Max molars= no tilt
Mand molar= lingual tilt

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23
Q

Number of roots on molars

A

Max= 3 roots; 1 paletal, 2 buccal
Mand= 2 roots

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24
Q

Explain roots on maxillary molars

A

3 roots
1. Longest paletal root
2. DB root; shortest
3. MB; wider + longer

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25
Q

Explain mandibular roots

A

2 roots
1. Mesial root (longer, wider)
2. Distal root (shorter, narrower)

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26
Q

Mandibular Molars

Name the buccal cusps of Mandibular 1st molars and rank them from greatest to smallest

A

Largest to Smallest
1. MB
2. ML
3. DL
4. DB
5. D

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27
Q

Name the buccal cusps of Mandibular 1st molars and rank them from tallest to shortest

A

Tallest to shortest
1. ML
2. DL
3. MB
4. DB
5. D

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28
Q

How many buccal grooves does the mandibular first molar have? Name?

A
  1. Mesio buccal groove
  2. Disto buccal groove
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29
Q

How many buccal grooves does the mandibular second molar have? Name?

A

Buccal groove

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30
Q

Only 15-20% of mandibular 1st molars are what?

A

the 4 cusp type. No distal cusp

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31
Q

How many cusp on mandibular 2nd molars, name, rank in size.

A

4 cusps ; MB, DB, ML, DL
Tallest cusp= ML
Biggest cusp= MB

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32
Q

Name the buccal cusps of Mandibular 2nd molars and rank them from tallest to shortest

A

Tallest to shortest
1. ML
2. DL
3. MB
4. DB

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33
Q

Name the buccal cusps of Mandibular 2nd molars and rank them from largest to smallest

A

Largest to Smallest
1. MB
2. DB
3. ML
4. DL

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34
Q

Explain proximal cotact of mandibular molars

A

Mesia= more occlusal
Distal= More middle 3rd

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35
Q

Explain CEJ on molars

A

Cut straight across and somtimes dips into frucation area

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36
Q

The mesial contour on mandibular is what?

A

Straighter

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37
Q

Compare roots on mandibular molars

A

1st= wider roots, more bent at apex (distal shorter)
2nd= closer roots, straighter

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38
Q

On mandibular molars, the ____ cusp is wider than the ____ cusp

A

ML wider than DL.

Can oven be viewd from buccal side cause theyre taller.

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39
Q
A
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40
Q

What is the purpose of the lingual till of mandibular molars

A

Prevents cheeks biting

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41
Q

Expalin crest of contour on mandibular molars

A

Lingual= middle 3rd
Buccal= Cervical 3rd

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42
Q

Mandibular molars

ridge forms a buccal bulge running mesiodistally and is often more prominent in mesial half

A

Cervical Ridge

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43
Q

WHat cusps side are more pointed on mandibular molars?

A

Lingual cusps more pointed & longer than buccal cusps.

44
Q

When looking at a mandibular molar froma proximal view, which side is higher?

A

Mesial higher, tapes down distally.

45
Q

Compare the marginal ridges on mandibilar molars

A
  • MMR is more occlusal
  • DMR is more cervical
46
Q

Explain the roots of mandibular molars

A

Mesial root is broader FL and longer than the distal root. You cant see anything past mesial root.

47
Q

Explain the canals in mandibular molar roots

A

Mesial Root has 2 canals
Distal root has 1 canal

48
Q

Mandibular

How many cusps do 1st molars have?

A

5 cusps; MB biggest, Distal smallest

49
Q

Mandibular

How many cusps do 2nd molars have?

A

4 cusps; MB largest, DL the smallest

50
Q

On what molars are buccal pits and decay common?

A

Mandibular molars

51
Q

occlusal view

**Buccal cervical ridge **more prominent on mesiobuccal outline on what mandibular molars?

A

Mandibular 2nd molars =

52
Q

occulsal view

Buccal cervical ridge more prominent near the middle (over distobuccal cusp), making outline more pentagon shaped what mandibular molar?

A

Mandibular 1st molars

53
Q

How many transverse ridges do mandibular molars have, what is the extra?

A

Both mandibular molars have 2 transverse ridge (MB-ML) and (DB-DL) and 1st molars have seperate triangular ridge on Distal cusp.

54
Q

How many fossa do mandibular molars have?

A

3 fossa; 3 pits. Central is largest.

55
Q

What mandibular molar has more zig zag central groove.

A

Mandibular 1st

56
Q

On both mandibular molars the mesial and distal contacts are slighlty more ____ so the ____ embasure is larger.

A

Contact more buccal, lingual embasure larger.

57
Q

What is the largest maxillary tooth?

A

Mandibular 1st Molar

57
Q
A
58
Q

What are the names of the two buccal cusps of a maxillary molar?

A

DB and MB

59
Q

Which cusp tip may also be visible from the buccal view on max molars?

A

ML cusp, b/c it is much taller and does a lot of work

60
Q

____ groove separates the mesiobuccal and distobuccal cusps, but is not caries prone on what molars?

A

Buccal groove on Max Molars

61
Q

What cusps form the oblique ridge on max molars?

A

ML to DB

62
Q

Where are proximal contact on max molars?

A

Mesial contact= middle 3rd
Distal contact= cervical 3rd

63
Q

Which one is the longest maxillary molar root? Which is the shortest?

A

Longest= Paletal
Shortest= Distal-buccal

64
Q

How does the root trunk on the Max first molar compared to that of a Max second molar? How about root divergence?

A

Max 1st= short root trunk
Max 2nd= thicker

65
Q

Explain root trends on max molars

A

Max 1st= wider roots
Max 2nd= closer roots

66
Q

On Max molars the occlusal cervical dimension is what compared to FL?

A

Shorter. Max crowns are wide and short

67
Q

How many cusp can you see from mesial view of a max molar?

A

Only two cusps (plus Carabelli, if present) visible from mesial view** since distal cusps are shorter**

68
Q

How many cusp can you see from distal view of a max molar?

A

4 cusps, since distal cusps are much shorter, you may be able to see some of the facial and lingual surfaces as well.

69
Q

Explain marginal ridges on max molars

A

MMR is more occlusal, DMR is more cerivical, see more past.

70
Q

Tubercles are More Common on ____ Marginal Ridges than __

A

More common on MMR

71
Q

How many roots can you see on a max molar from a mesial view?

A

Only 2 (MB & Lingual) , becauase MB root is wider and taller covering the DB root.

You can see all 3 roots from distal

72
Q

Max 2nd molars have 3 larger cusps (mesiobuccal, distobuccal, and mesiolingual) and one smaller or absent cusp ?

A

The DL cusp

73
Q

Max 1st molars have 4 cusp plus a ____ on the ____ cusp

A

Cusp of Carabellie on large ML cusp

74
Q

Max First and second have ____ greater than ____ dimension

A

BL narrower than MD dimesion

75
Q

Explain Occlsual shape of Max 1st molars and why

A

Buccal half of crown is narrower than lingual half due to the large DL cusp.

Rhomboid almost square.

occlusal view

76
Q

What molar

More rectangular outline

A

Mandibular 2nd molar

77
Q

What is the transverse ridge on max molars?

A

MB to ML cusp

78
Q
A
79
Q

Occlusal preperations of maxillary molars may not what?

A

NOT pass the oblique ridge

80
Q

Explain proximal contacts on maxillary molars

A

They are both slightly buccal to the midline, so the lingual embasure is larger.

81
Q

Explain main traits of all 3rd molars

A
  • Smaller
  • Bulbous+ smaller occlusal table
  • Wrinkled surface
  • Fused roots, open apices
  • Roots bend distally
82
Q

only maxillary teeth to occlude with only one tooth

A

Maxillary 3rd molars

Mandibular centrals also.

83
Q

3rd molars when they havent fully errupted may be covered witha tissue flap called

A

Opperculum

84
Q

Trauma and infection to the opperculum may cause

A

Pericoronitis

85
Q

What are the shortest permanent teeth? Short crowns and roots

A

3rd molars

86
Q

What varitation on what tooth?

Extra cusp on buccal surface of cusp

A

mandibular molars

87
Q

Possible extra lingual cusp on mandibular molars

A

Tuberculum intermedium

88
Q

Extra cusp (tubercle) on distal marginal ridge of mandibular first molar is called

A

tuberculum sextum

89
Q

Which three grooves radiate out from the central fossa in a maxillary first molar?

A
  • Central
  • Transverse groove of oblique ridges
  • Buccal
90
Q

Which cusp on a maxillary first molar has two ridges: one that forms part of a transverse ridge and the other that forms part of an oblique ridge?

A

Mesiolingual

91
Q

Which cusp is the largest and longest on a maxillary second molar?

A

Mesiolingual

92
Q

Which cusp is most likely to be absent on a maxillary second molar?

A

Distolingual

93
Q

Of the four fossae on a maxillary first molar, which is the largest?

A

Central

94
Q

From which view are only two roots visible on a maxillary first molar?

A

Mesial

95
Q

Which two cusps have the ridges that make up or join to form the oblique ridge on a maxillary molar?

A

ML and DB

96
Q

Which two cusps have a triangular ridge that make up or join to form a transverse (not oblique) ridge on most maxillary molars?

A

MB and ML

97
Q

List cups of max 1st molar from largest to smallest

A

Largest to smallest
1. ML
2. MB
3. DB
4. DL
5. CC (if present)

98
Q

Which of the following grooves radiate out from the central fossa in a mandibular second molar?

A

Central, Lingual, Buccal

99
Q

Which cusp is the largest and longest on a mandibular second molar?

A

ML

100
Q

Which cusp may be absent on a mandibular first molar?

A

Distal

101
Q

When the distal cusp is present which groove(s) would not be present?

A

Mesiobuccal and distobucclal; it would just be a buccal groove

102
Q

From which view is only one root visible on a mandibular first molar?

A

Mesial

103
Q

Which root may occasionally be divided or bifurcated on a mandibular first molar?

A

Meisal root

104
Q

On a five-cusped molar, which cusp does not have a triangular ridge that forms part of a transverse ridge?

A

Distal

105
Q

Which two pairs of cusp triangular ridges make up or join to form the two transverse ridges on a mandibular second molar?

A

DB-DL and MB-ML

DAM 1001 (13 decks)

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