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Dental Anatomy > Mandibular molar > Flashcards

Mandibular molar Flashcards

1
Q

What is the largest and strongest set of teeth in the mandibular arch?

A

Mandibular Molars

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2
Q

What is the crown shape of mandibular molars?

A

Quadrilateral

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3
Q

Which dimension is wider of mandibular molars, Mesial Distal or Buccal Lingual?

A

Mesial Distal

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4
Q

True or False: Mandibular molars are longer crevico-occlusally than teeth anterior to them?

A

FALSE
Mandibular molars are shorter cervico-occlusally than teeth anterior to them, but larger in all other dimensions

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5
Q

True or False: Mandibular molars are longer crevico-occlusally than teeth anterior to them?

A

FALSE
Mandibular molars are shorter cervico-occlusally than teeth anterior to them, but larger in all other dimensions

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6
Q

How many roots are typically present in mandibular molars?

A

2 - bifurcated

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7
Q

True or False: The sum of the mesial distal measurement of molars is equal to or greater than the sum of the mesial distal measurements of all teeth anterior to them to the midline

A

T

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8
Q

First calcification

A

birth

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9
Q

enamel completion

A

2.5-3

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10
Q

eruption

A

6-7 years

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11
Q

root completion

A

9-10 years

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12
Q

Is the mesial distal width greater than or smaller than the buccal lingual width in the mandibular first molar?

A

Greater than

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13
Q

How many cusps does the mandibular 1st molar have?

A

5 cusps

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14
Q

Which root of the mandibular 1st molar curves more distal and usually has 2 canals and 1 foramen?

A

Mesial Root

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15
Q

Which root of the mandibular 1st molar is more straight that has a single canal and one foramen, but might have 2 canals occasionally?

A

Distal root

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16
Q

From the buccal aspect, how many cusps are visible?

A

All 5

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17
Q

Rank the cusps of the mandibular 1st molar from largest to smallest

A

Mesiobuccal, Mesiolingual, Distolingual, Distobuccal, Distal

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18
Q

What dimension are the 2 roots more broad in?

A

Bucco/lingual dimension, mesial root is usually bigger

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19
Q

True or false: the lingual cusps are taller than the buccal cusps on the mandibular first molar

A

T

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20
Q

What groove separates the distobuccal cusp and distal cusp?

A

Distobuccal Groove

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21
Q

What groove separates the mesiobuccal cusp and the distobuccal cusp?

A

Mesiobuccal Goove

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22
Q

Where is the height of contour on the mesial?

A

Junction of the occlusal and middle third

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23
Q

distAL

A

M1/3

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24
Q

buccal

A

c 1/3

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25
Q

lingual

A

m 1/3

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26
Q

From the buccal aspect, what shape is the crown?

A

Trapezoid

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27
Q

How many cusps can you see from the lingual aspect of the mandibular first molar?

A

3- mesiolingual, distolingual, and off to the side you can see distal

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28
Q

What groove is between the mesiolingual and distolingual cusps, that extends on the lingual surface?

A

Lingual Groove

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29
Q

True or False: There is a root depression on the distal aspect

A

FALSE, Root Depression on Mesial Root

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29
Q

True or False: There is a root depression on the distal aspect

A

FALSE, Root Depression on Mesial Root

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30
Q

True or False: There is an enamel projection beyond the CEJ onto the root on the lingual aspect of the mandibular first molar

A

T

31
Q

What shape is the mandibular molars from the proximal view?

A

Rhomboidal

32
Q

From the mesial aspect, is there more of a lingual tilt or buccal tilt on the mandibular first molar?

A

Lingual tilt

33
Q

From the distal aspect, how many cusps can you see?

A

5

34
Q

From the mesial aspect, how many roots can you see on the mandibular 1st molar?

A

1- mesial root

35
Q

From the distal aspect, how many roots can you see on the mandibular 1st molar?

A

2

36
Q

Why can you see all of the cusps on the distal aspect of the mandibular 1st molar?

A

Because the Distal Marginal Ridge sits LOWER (more cervically) than the Mesial Marginal Ridge

37
Q

What is another name for the mesiobuccal groove?

A

Mesiobuccal DEVELOPEMENTAL groove

38
Q

What sort of appearance is the central groove in the mandibular 1st molar resemble?

A

Zigzag shape

39
Q

True or False: The mandibular first molars appear to have a significant lingual and distal taper

A

T

40
Q

Are cusps part of a transverse ridge?

A

NO

41
Q

68% of the the time, the mandibular 1st molar will have what?

A

Mesiomarginal Developemental Groove

42
Q

What other tooth besides a mandibular 1st molar might also has a mesiomarginal developmental groove?

A

Maxillary 1st Premolar

43
Q

Since the mesial root of the mandibular 1st molar has 2 canals, how many apexes (apex/foramens) does it have?

A

1

44
Q

True or False: The three cusps on the buccal surface are relatively flat because this helps with the mastication/grinding of food

A

T

45
Q

True or False: The Lingual Cusps on mandibular molars are functional

A

FALSE- feel it with your tongue, these are commonly the cusps that will fracture

46
Q

Fill in the blank in regards to the mandibular first molars: Lingual cusps are more ____________ , similar in size, both are _____________ than the mesiobuccal cusp

A

pointed/taller, smaller

47
Q

How many cusps can you see from the mesial aspect of the mandibular 1st molar?

A

2 because mesial marginal ridge sits higher, more occlusal than the distal marginal ridge

48
Q

The occlusal crown is what sort of shape?

A

Hexagonal

49
Q

What converges on the central pit of the occlusal surface of the mandibular first molar?

A

developmental grooves

50
Q

Mandibular 2nd Molar calcification occurs at

A

2.5-3 years

51
Q

Enamel completion of the mandibular 2nd molar

A

7-8 years

52
Q

Eruption of the mandibular 2nd molar

A

11-13 years

53
Q

Root completion of mandibular 2nd molar

A

14-15 years

54
Q

Which dimension is wider of the mandibular 2nd molar, the mesial distal or buccal lingual?

A

Mesial Distal

55
Q

How many cusps does the mandibular 2nd molar have?

A

4

56
Q

What has a cruciform shape with primary grooves and a lot of secondary anatomy?

A

The occlusal table of the mandibular second molar

57
Q

Which root of the mandibular 2nd molar head towards the distal and has two canals and one foramen?

A

Mesial Root

58
Q

Which root fo the mandibular 2nd molar is more straight?

A

distal root

59
Q

True or False: The four cusps are relatively close in size of the mandibular 2nd molar but the Mesiobuccal cusp is the largest

A

FALSE, the four cusps are relatively close in size but the size from largest to smallest goes: Mesiolingual, Distolingual, Mesiobuccal, and Distobuccal

60
Q

Are the 2 roots closer together , sometimes fused, but broad B/L than M/D of the mandibular 2nd molar?

A

Yes

61
Q

From the buccal aspect how many cusps can you see of that on the mandibular 2nd molar?

A

4

62
Q

What separates the mesiobuccal cusp and the distobuccal cusp?

A

Buccal groove

63
Q

What shape is the crown from the buccal surface?

A

Trapezodial

64
Q

Height of contour of the mandibular 2nd molar on the mesial?

A

Junction between the occlusal and middle third

65
Q

Height of contour of the mandibular 2nd molar on the distal?

A

m 1/3

66
Q

Height of contour of the mandibular 2nd molar on the Buccal?

A

Cervical Third (but the cervical ridge is not as prevalent when compared to mandibular 1st molar)

67
Q

Height of contour of the mandibular 2nd molar on the lingual?

A

m 1/3

68
Q

From the proximal view, what shape is the crown of the mandibular 2nd molar?

A

Rhomboidal

69
Q

Is there a lingual or buccal tilt on the mandibular 2nd molar?

A

Lingual

70
Q

From the distal aspect, how many cusps and roots can you see on the mandibular 2nd molar?

A

4 cusps and 2 roots

71
Q

From the lingual aspect, how many cusps can you see on mandibular 2nd molar?

A

2

72
Q

From the mesial aspect how many cusps can you see?

A

3- Mesiobuccal, Mesiolingual, and Distobuccal (only b/c the cervical ridge is less prominent)

73
Q

How many cusps can a mandibular third molar have?

A

4-6

74
Q

When is the eruption of a mandibular third molar?

A

17-21 years

75
Q

When is the root completion of the mandibular third molar?

A

18-25 years

Dental Anatomy (17 decks)

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