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Mandibular molar Flashcards

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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
lingual
m 1/3
26
From the buccal aspect, what shape is the crown?
Trapezoid
27
How many cusps can you see from the lingual aspect of the mandibular first molar?
3- mesiolingual, distolingual, and off to the side you can see distal
28
What groove is between the mesiolingual and distolingual cusps, that extends on the lingual surface?
Lingual Groove
29
True or False: There is a root depression on the distal aspect
FALSE, Root Depression on Mesial Root
29
True or False: There is a root depression on the distal aspect
FALSE, Root Depression on Mesial Root
30
True or False: There is an enamel projection beyond the CEJ onto the root on the lingual aspect of the mandibular first molar
T
31
What shape is the mandibular molars from the proximal view?
Rhomboidal
32
From the mesial aspect, is there more of a lingual tilt or buccal tilt on the mandibular first molar?
Lingual tilt
33
From the distal aspect, how many cusps can you see?
5
34
From the mesial aspect, how many roots can you see on the mandibular 1st molar?
1- mesial root
35
From the distal aspect, how many roots can you see on the mandibular 1st molar?
2
36
Why can you see all of the cusps on the distal aspect of the mandibular 1st molar?
Because the Distal Marginal Ridge sits LOWER (more cervically) than the Mesial Marginal Ridge
37
What is another name for the mesiobuccal groove?
Mesiobuccal DEVELOPEMENTAL groove
38
What sort of appearance is the central groove in the mandibular 1st molar resemble?
Zigzag shape
39
True or False: The mandibular first molars appear to have a significant lingual and distal taper
T
40
Are cusps part of a transverse ridge?
NO
41
68% of the the time, the mandibular 1st molar will have what?
Mesiomarginal Developemental Groove
42
What other tooth besides a mandibular 1st molar might also has a mesiomarginal developmental groove?
Maxillary 1st Premolar
43
Since the mesial root of the mandibular 1st molar has 2 canals, how many apexes (apex/foramens) does it have?
1
44
True or False: The three cusps on the buccal surface are relatively flat because this helps with the mastication/grinding of food
T
45
True or False: The Lingual Cusps on mandibular molars are functional
FALSE- feel it with your tongue, these are commonly the cusps that will fracture
46
Fill in the blank in regards to the mandibular first molars: Lingual cusps are more ____________ , similar in size, both are _____________ than the mesiobuccal cusp
pointed/taller, smaller
47
How many cusps can you see from the mesial aspect of the mandibular 1st molar?
2 because mesial marginal ridge sits higher, more occlusal than the distal marginal ridge
48
The occlusal crown is what sort of shape?
Hexagonal
49
What converges on the central pit of the occlusal surface of the mandibular first molar?
developmental grooves
50
Mandibular 2nd Molar calcification occurs at
2.5-3 years
51
Enamel completion of the mandibular 2nd molar
7-8 years
52
Eruption of the mandibular 2nd molar
11-13 years
53
Root completion of mandibular 2nd molar
14-15 years
54
Which dimension is wider of the mandibular 2nd molar, the mesial distal or buccal lingual?
Mesial Distal
55
How many cusps does the mandibular 2nd molar have?
4
56
What has a cruciform shape with primary grooves and a lot of secondary anatomy?
The occlusal table of the mandibular second molar
57
Which root of the mandibular 2nd molar head towards the distal and has two canals and one foramen?
Mesial Root
58
Which root fo the mandibular 2nd molar is more straight?
distal root
59
True or False: The four cusps are relatively close in size of the mandibular 2nd molar but the Mesiobuccal cusp is the largest
FALSE, the four cusps are relatively close in size but the size from largest to smallest goes: Mesiolingual, Distolingual, Mesiobuccal, and Distobuccal
60
Are the 2 roots closer together , sometimes fused, but broad B/L than M/D of the mandibular 2nd molar?
Yes
61
From the buccal aspect how many cusps can you see of that on the mandibular 2nd molar?
4
62
What separates the mesiobuccal cusp and the distobuccal cusp?
Buccal groove
63
What shape is the crown from the buccal surface?
Trapezodial
64
Height of contour of the mandibular 2nd molar on the mesial?
Junction between the occlusal and middle third
65
Height of contour of the mandibular 2nd molar on the distal?
m 1/3
66
Height of contour of the mandibular 2nd molar on the Buccal?
Cervical Third (but the cervical ridge is not as prevalent when compared to mandibular 1st molar)
67
Height of contour of the mandibular 2nd molar on the lingual?
m 1/3
68
From the proximal view, what shape is the crown of the mandibular 2nd molar?
Rhomboidal
69
Is there a lingual or buccal tilt on the mandibular 2nd molar?
Lingual
70
From the distal aspect, how many cusps and roots can you see on the mandibular 2nd molar?
4 cusps and 2 roots
71
From the lingual aspect, how many cusps can you see on mandibular 2nd molar?
2
72
From the mesial aspect how many cusps can you see?
3- Mesiobuccal, Mesiolingual, and Distobuccal (only b/c the cervical ridge is less prominent)
73
How many cusps can a mandibular third molar have?
4-6
74
When is the eruption of a mandibular third molar?
17-21 years
75
When is the root completion of the mandibular third molar?
18-25 years

Dental Anatomy (17 decks)

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