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Tim's Cards > Dental Anatomy V - Quiz 4 > Flashcards

Dental Anatomy V - Quiz 4 Flashcards

1
Q

Name the Facial Cusps of the Mandibular 1st Molar?

A

Mesiofacial
Distofacial
Distal

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2
Q

Describe the Facial Cusps of the Mandibular 1st Molar

A

Mesiofacial - Almost Flat

Distofacial - 90 degrees, More Pointed than MF

Distal - very small, Lingual, more pointed than MF or DF

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3
Q

Describe the MF cusp of the Mdb1M

A

Almost flat

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4
Q

Describe the DF cusp of the Mdb1M

A

90 degrees

More pointed than MF

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5
Q

Describe the Distal cusp of the Mdb1M

3 things

A

Small
Lingual
More pointed than MF or DF

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6
Q

T/F

There is no Facial groove in the Mdb1M

A

False

  • Two of them
  • Mesiofacial groove
  • Distofacial groove
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7
Q

Which groove is shorter, the Mesiofacial or Distofacial groove of the Mdb1M?

A

Mesiofacial

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8
Q

The Mesiofacial groove of the Mdb1M extends from the ______ to the ______.

A

Occlusal

Halfway to Cervical Line

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9
Q

What is at the end of the MF groove of the Mdb1M?

A

Slight lateral depression

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10
Q

How long is the Root Trunk in the Facial aspect of the Mdb1M?

A

3mm

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11
Q

Describe the Depression on the facial aspect of the Mdb1M

3 points

A

Deep
progressively Shallow occlusally
Does NOT cross cervical line

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12
Q

How are the 2 roots of the Mdb1M positioned from the Facial aspect?

A

Mesially

Distally

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13
Q

How do the roots of the Mdb1M compare to the roots of the Mdb2M?
(2 points)

A

Longer

More divergent

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14
Q

Which root length is greater in the Mdb1M, the Facial or Lingual aspect?
Why?

A

Lingual

Cervical line has moved occlusally 1mm on the Lingual side

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15
Q

Where is the Cervical Line higher in the Mdb1M, Lingual or Facial?
By how much?

A

Lingual

1mm
making root length 4mm

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16
Q

From the mesial aspect of the Mdb1M, what shap is the crown outline?

A

Rhomboidal

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17
Q

Mesial aspect Mdb1M: The Crest of Contour of the Cervical Ridge is _______ than MaxM’s, but _______.

A

Higher Occlusally

Still in Cervical 1/3

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18
Q

Mdb1M - Mesial Aspect

What is the angle between the Triangular Ridge of the ML cusp and the Mesial Marginal Ridge?

A

30 Degrees

19
Q

Why can very little occlusal surface be seen from the Mesial Aspect of the Mdb1M?

A

Mesial cusps Taller

20
Q

Mdb1M - Distal Aspect

The facial outline of the Distal Cusp is _____ to the facial outline of the taller _____ cusp

A

Lingual

Distofacial

21
Q

From the Distal Aspect Mdb1M, what is superimposed onto the Distofacial Cusp?

A

Entire Distal Cusp

22
Q

What EXCLUSIVELY makes up the distal contact area of the Mdb1M?
Where is this located in relation to the faciolingual bisector of the crown?

A

Distal Cusp

```
Slightly Facial
definitely NOT lined up
~~~

23
Q

Mdb1M - Distal Aspect

Both the distal and distofacial cusp tips are _____ to the apices of the mesial and distal roots.

A

Facial

24
Q

What is the most Facially placed cusp in the Mdb1M?

A

Distofacial cusp

25
Q

What is the most Distally placed cusp in the Mdb1M?

A

Distal cusp

26
Q

What is the most Mesially placed cusp in the Mdb1M?

A

Mesiolingual cusp

27
Q

What are the cusp sizes of the Mdb1M from largest to smallest?

A 
Mesiofacial
Mesiolingual
Distolingual
Distofacial
Distal
28
Q

Mdb2M - Facial Aspect
How many facial grooves?
What does it divide?
Where does it end?

A

One

Mesiofacial and Distofacial cusps

Distinct pit in Middle 1/3 of crown

29
Q

What are the 2 pieces of Negative Anatomy on the Facial Aspect of the Mdb2M?

A

Facial Groove

Facial Pit (middle 1/3)

30
Q

Describe the path and location of the facial groove in the Mdb2M

A

path: slight Mesial bend toward Facial Pit
location: slightly Distal to vertical line dividing line in half

31
Q

Mdb2M
Mesiofacial cusp is located closer to:
Vertical faciolingual long axis bisector, or
Facial outline

A

Vertical faciolingual long axis bisector

32
Q

Mb2M - Occlusal View
Which set of cusps is offset further from their respective outlines?
What 1 cusp in particular?

A

Facial Cusps

Mesiofacial cusp especially

33
Q

Describe the Lingual cusps of the Mb2M

A

Not as offset as far from Lingual outline as Facial cusps are offset from Facial outline

34
Q

What divides the Occlusal surface of the Mb2M into halves?

A

Central Groove

35
Q

What meets at right angles at the Central Groove of the Mb2M?
(these are the 3 major grooves)

A

Facial groove
Lingual groove
Central groove

36
Q

What do the facial, lingual, and central grooves of the Mb2M make?
What does this delineate?

A

cross design

4 cusps approximately equal size

37
Q

To what side is the central pit of the Mb2M offset?

A

Lingually

*forms from facial, lingual, central grooves

38
Q

Where do the lateral ends of the central groove end in the Mb2M?

A

Mesial and Distal Triangular fossae

39
Q

T/F

The Mesial and Distal Triangular fossae of the Mb2M each have a triangular Pit

A

True

40
Q

Each of the 4 cusps of the Mb2M have 3 features.

What are they?

A

Mesial and Distal Cuspal Ridges

Triangular Ridge

41
Q

The Triangular Ridges of the Mb2M form what?

A

2 Transverse Ridges

42
Q

What feature of the Mb3M often exhibits decay because it is difficult to clean?
Where is it located?

A

Facial Pit

Middle 1/3 Facial aspect

43
Q

Mb3M - Mesial aspect

Where is the Central Groove located?

A

Lingual to faciolingual long axis bisector

44
Q

Mb3M - Occlusal

What direction is wider?

A

Mesiodistal wider than faciolingual

just like other molars

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