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Tim's Cards > Dental Anatomy IV- Quiz III > Flashcards

Dental Anatomy IV- Quiz III Flashcards

1
Q

T/F

Lingual cusps are more pointed than Facial cusps in the Maxillary 1st Molar

A

False

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2
Q

Describe the mesiofacial cusp ridges of the Maxillary 1st Molar

A

Obtuse

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3
Q

Describe the distofacial cusp ridges of the Maxillary 1st Molar

A

90 degree angle

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4
Q

Which facial cusp in the maxillary 1st molar is more angulated?

A

Distofacial cusp

*90 degrees

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5
Q

T/F

The Maxillary 1st Molar doesn’t have a Lingual Groove

A

False

*Occlusocervical Facial lingual groove

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6
Q

Describe the Occlusocervical Facial Groove of Max 1M

A

Delineates Mesiofacial and Distofacial

Centered

Slightly angulated toward distal

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7
Q

Which Root Surface has a 4 mm Root Trunk on a Max1M?

A

Facial

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8
Q

Name 3 features on the facial side/surface of the Max1M

A

Depression (at facial groove terminus)
Cervical Ridge (mesial 2/3)
Vertical facial ridges extending from cusps

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9
Q

Where is the Facial Depression in relation to the Cervical Ridge in the Max1M

A

Occlusal and Parallel to

*remember, starts at Lingual groove terminus (cervical limit of)

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10
Q

Where do the Vertical Facial ridges extending from the cusp tips in the Max1M terminate?

A

Cervical 1/3

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11
Q

Where is the Cervical Ridge of the Max1M?

A

Mesial 2/3

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12
Q

Describe the Lingual Cusp of the Max1M

A

Mesiolingual cusp - 60%

Distolingual cusp - 40%

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13
Q

Describe the lingual groove of the Max1M

A

Begins as Distal Oblique and slants cervically and diagonally until middle
Then, parallel to long axis

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14
Q

The mesiofacial and mesiodistal triangular ridges of the Max1M compare to the premolars in what way?

A

Not as inclined

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15
Q

What lines up vertically with the long axis of the mesial surface of the Max1M?
How does it get there?

A

Mesial Marginal Ridge Groove

Crosses Mesial Marginal Ridge

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16
Q

How many roots are visible from the Mesial view of the Max1M?
Which root is wider?

A

2

*Mesiofacial wider

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17
Q

T/F

The root trunk of the mesial view of the Max1M is shorter than the facial view (4mm).

A

True

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18
Q

From what view is the trifurcation concavity evident in the Max1M?

A

Mesial

19
Q

Describe the Mesiofacial Root of the Max1M

3 things

A

Extends facially in middle 1/3
Tapers lingually to blunt tip (apex)
Apex right under Mesiofacial cusp

20
Q

What other surface can be seen from the Distal view of the Max1M?

A

Facial

21
Q

Why does the Maxillary 1st Molar narrow distally?

A

Cervical Ridges flatten distally

22
Q

Name the cusp sizes from larges to smallest on the Maxillary 1st Molar

A 
Mesiolingual
Mesiofacial
Distolingual
Distofacial
5th
23
Q

What are the 2 major fossae of the Max1M?

A

Central

Distal

24
Q

What separates the Central and Distal fossae of the Max1M?

A

Oblique Ridge

25
Q

Describe the Facial Groove of the Max2M

A

Short

Distal

26
Q

What facial cusp is wider in the Max2M

A

Mesiofacial wider than Distofacial

27
Q

Describe the Cervical Line in the Max2M

A

Apical dip midway

*otherwise straight

28
Q

From the lingual aspect of the Max2M, what angle is important?
Measurement?

A

Mesiocuspal Ridge to the Mesial Outline (which is relatively straight)

115 degrees

29
Q

What is the mesiodistal width of the Distolingual cusp in the Max2M

A

35%

30
Q

Name the cusps that can be seen from the Mesial view of the Max2M

What cusp isn’t seen?

A

Mesiofacial
Mesiolingual
Distofacial

Distolingual NOT seen

31
Q

How many roots can be seen from the Mesial view of the Max2M?

A

2

of 3

32
Q

Describe the Facial and Lingual crown outlines from the Mesial Aspect of the Max2M

A

Convex

33
Q

Describe the Mesial Marginal Ridge of the Max2M

2 points

A

Semicircular

No groove

34
Q

Where are the Acute angles of the occlusal view of the Max2M?

A

Mesiofacial and Distolingual Line Angles

35
Q

Which line angles of the Max2M are obtuse?

A

Distofacial and Mesiolingual

36
Q

Where is the mesiofacial cusp?

Distolingual cusp?

A

Most facially and mesially placed cusp
Most lingually and distally places cusp

*More than others because of rhomboid

37
Q

How many cusps are on the Max2M?

A

4 well-developed

38
Q

What cusp of the Max2M is most mesial?

Which is most distal?

A

Mesiofacial

Distolingual

39
Q

What cusp of the Max2M is most Facial?

Most LIngual?

A

Mesiofacial

Distolingual

40
Q

What 2 Ridges of the Max2M meet closer to the Central Pit than in the Max1M?

A

Triangular Ridge of the Distofacial Cusp

Distal Cuspal Ridge of the Mesiolingual Cusp

41
Q

What is the Root to Crown ratio of the Max3M?

A

2:1

42
Q

List the cusp sizes from largest to smallest in the Max3M

A

Mesiofacial
Mesiolingual
Distofacial
Distolingual

43
Q

What are the 3 major pits of the Max3M?

A

Mesial Triangular
Distal Triangular
Central

44
Q

What is lacking in the Max3M that would normally delineate Mesiolingual from the Distolingual cusps?

A

Lingual Groove

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