Dental Anatomy IV- Quiz III Flashcards Preview

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Flashcards in Dental Anatomy IV- Quiz III Deck (44):
1

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

False

2

Describe the mesiofacial cusp ridges of the Maxillary 1st Molar

Obtuse

3

Describe the distofacial cusp ridges of the Maxillary 1st Molar

90 degree angle

4

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

Distofacial cusp

*90 degrees

5

T/F
The Maxillary 1st Molar doesn't have a Lingual Groove

False

*Occlusocervical Facial lingual groove

6

Describe the Occlusocervical Facial Groove of Max 1M

Delineates Mesiofacial and Distofacial

Centered

Slightly angulated toward distal

7

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

Facial

8

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

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

9

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

Occlusal and Parallel to

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

10

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

Cervical 1/3

11

Where is the Cervical Ridge of the Max1M?

Mesial 2/3

12

Describe the Lingual Cusp of the Max1M

Mesiolingual cusp - 60%

Distolingual cusp - 40%

13

Describe the lingual groove of the Max1M

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

14

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

Not as inclined

15

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

Mesial Marginal Ridge Groove

Crosses Mesial Marginal Ridge

16

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

2

*Mesiofacial wider

17

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

True

18

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

Mesial

19

Describe the Mesiofacial Root of the Max1M
(3 things)

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

20

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

Facial

21

Why does the Maxillary 1st Molar narrow distally?

Cervical Ridges flatten distally

22

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

Mesiolingual
Mesiofacial
Distolingual
Distofacial
5th

23

What are the 2 major fossae of the Max1M?

Central
Distal

24

What separates the Central and Distal fossae of the Max1M?

Oblique Ridge

25

Describe the Facial Groove of the Max2M

Short
Distal

26

What facial cusp is wider in the Max2M

Mesiofacial wider than Distofacial

27

Describe the Cervical Line in the Max2M

Apical dip midway

*otherwise straight

28

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

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

115 degrees

29

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

35%

30

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

What cusp isn't seen?

Mesiofacial
Mesiolingual
Distofacial

Distolingual NOT seen

31

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

2
(of 3)

32

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

Convex

33

Describe the Mesial Marginal Ridge of the Max2M
(2 points)

Semicircular
No groove

34

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

Mesiofacial and Distolingual Line Angles

35

Which line angles of the Max2M are obtuse?

Distofacial and Mesiolingual

36

Where is the mesiofacial cusp?
Distolingual cusp?

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

*More than others because of rhomboid

37

How many cusps are on the Max2M?

4 well-developed

38

What cusp of the Max2M is most mesial?
Which is most distal?

Mesiofacial
Distolingual

39

What cusp of the Max2M is most Facial?
Most LIngual?

Mesiofacial
Distolingual

40

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

Triangular Ridge of the Distofacial Cusp

Distal Cuspal Ridge of the Mesiolingual Cusp

41

What is the Root to Crown ratio of the Max3M?

2:1

42

List the cusp sizes from largest to smallest in the Max3M

Mesiofacial
Mesiolingual
Distofacial
Distolingual

43

What are the 3 major pits of the Max3M?

Mesial Triangular
Distal Triangular
Central

44

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

Lingual Groove

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