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Endodontics > After Midterm: Lab Mandibular Molars > Flashcards

After Midterm: Lab Mandibular Molars Flashcards

1
Q

Man1M # of roots:

A

2, sometimes 3

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2
Q

Man1M, # of canals:

A

3-4, sometimes 5+

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3
Q

Crown length and avg length, Man1M:

A

7.5mm, 14mm

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4
Q

Most Man1M have how many roots?

A

2

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5
Q

TF? If there are 2 roots on the Man1M they most often join.

A

T

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6
Q

If the Man1M has more than 2 canals, which root is more likely to have 2?

A

mesial

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7
Q

If there are 2 or more canals at apex, which root is more likely to have multiple?

A

M root

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8
Q

If there are 2 or more canals in a root, which root is more likely to have multiple?

A

M root

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9
Q

If there is one canal at the apex, which root is more likely to have 1?

A

D root

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10
Q

If there are 2 or more canals at the apex, which root is more likely to have multiple?

A

M root

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11
Q

Which root is more likely to be distal and straight?

A

M

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12
Q

Which canal is more likely to be straight and distal?

A

D

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13
Q

% of M roots of the Man1M that have 2 canals:

A

71%, 1: 12%, 3: 1%

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14
Q

% of D roots of the Man1M that have 2 canals:

A

30%, 1: 70%

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15
Q

Canal types and %’s when 2 M canals are present:

A

Type IV: 60%, Type II: 40%

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16
Q

Canal types and %’s when 2 D canals are present:

A

Type IV: 40%, Type II: 60%

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17
Q

when M root has 3 canals, the 3rd root is called:

A

Middle Mesial Canal

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18
Q

Location of the Middle Mesial Canal:

A

bw MB and ML canals in the isthmus

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19
Q

Incidence of Middle Mesial Canals in the Man1M:

A

1-15% up to 45%?

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20
Q

Pop that more frequently have Middle Mesial Canals:

A

younger pts

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21
Q

TF? canals don’t mean that they were joined before C and S.

A

T

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22
Q

Is the furcation wall thin or thick bw MB and ML canals?

A

Thin

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23
Q

3rd root is more common in which population?

A

Asian

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24
Q

Types of 3rd roots:

A

radix paramolars and radix entomolaris

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25
Q

Where is the 3rd root w radix paramolars?

A

B

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26
Q

Which is more common, radix paramolaris or radix entomolaris?

A

entomolaris

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27
Q

Where is the 3rd root in radix entomolars?

A

on the L

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28
Q

In which root are instruments most frequently broken?

A

M root

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29
Q

Wider portion of the trapezoid access should face:

A

the M

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30
Q

Center of teh access form of the Man1M should be:

A

centered on the M 2/3’s of the crown

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31
Q

Which canal is usually under the MB cusp tip?

A

MB canal

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32
Q

The mesial wall of the access should approach:

A

the mesial pit

33
Q

Where is the distal canal if only 1?

A

centered bw both mesials

34
Q

Where is the distal canal if 3?

A

offset to the B or L

35
Q

The B canal is broad in this direction:

A

B-L

36
Q

What is the Law of Symmetrty?

A

except for max molars, canal orifices are equidistnat rom a line drawn in a MD direction thru center of the pulp floor

37
Q

Which tooth does the Law of symmetry not apply to?

A

Max molars

38
Q

Man2M, erupton time:

A

12y

39
Q

man1M eruption time:

A

6y

40
Q

Man2M, crown lenth and avg lentgth:

A

7mm, 20mm

41
Q

of roots, Man2M:

A

1-3

42
Q

of canals, Man2M::

A

2-4 (2 least freq)

43
Q

Which root is more likely to have one canal for the Man2M:?

A

D

44
Q

Which root is more likely to have 2+ canals for the Man2M:?

A

M

45
Q

Which root is more likely to have 1 canal at apex for the Man2M:?

A

M

46
Q

Which root is more likely to have 2+ canals at apex for the Man2M:?

A

M

47
Q

Which Man2M root is more often distal and straight?

A

M

48
Q

Which Man2M root is more often straight and distal?

A

D

49
Q

% of M roots w 2 canals for Man2M:

A

73%

50
Q

% of D roots with 2 canals, Man2M:

A

7%

51
Q

% of M roots w 1 canal, Man2M:

A

27%

52
Q

% of D roots w 1 canal for the Man2M:

A

92%

53
Q

Incidence of C shaped canals, Man2M:

A

8%

54
Q

Classification types of C shaped canaled Man2M:

A

Type -4

55
Q

Type i:

A

C

56
Q

Type II:

A

Semicolon

57
Q

Type III:

A

2 or 3 separate canals

58
Q

Type I:

A

no discernible canal

59
Q

Semlcolon is what canal type:

A

II

60
Q

2 or 3 separate canals, canal type:

A

III

61
Q

no discernible canal, canal type:

A

IV

62
Q

Canal type w obviously separated canals:

A

III

63
Q

Canal type that looks like a C from the occlusal:

A

I

64
Q

Smaller semicolon canal type:

A

II

65
Q

Larger semicolon, canal type:

A

III

66
Q

How is the access shape different for the Man1M from the Man2M:

A

their not

67
Q

Access shape for Man2M:

A

trapezoid

68
Q

Where should the access shape of the Man2M be centered?

A

mesial 2/3

69
Q

Which canal is typically under the MB cusp tip of the Man2M?

A

MB canal

70
Q

[Mesial wall of access ofr the Man2M should approach:

A

mesial pit

71
Q

Eruption time of Man3M:

A

17-21

72
Q

This is the most variable tooth in the mouth:

A

Man3M

73
Q

The Man3M typically has this number of cusps and roots:

A

5 cusps, 2 roots

74
Q

What will happen if you don’ tget straight line access for the Man3M:

A

you will file toward the furcation

75
Q

How to determine the reference point for each canal:

A

name of the canal should match the cups tip

76
Q

TF? There are dentinal triangles in the Man3M.

A

T

77
Q

TF? Always file toward the furcation.

A

F

78
Q

File toward this in the MB canal:

A

MB line angle

79
Q

File toward this in the ML canal:

A

ML line angle

Endodontics (22 decks)

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