Dental Anatomy IV- Quiz III

Question 1

T/F

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

Answer 1

False

Question 2

Describe the mesiofacial cusp ridges of the Maxillary 1st Molar

Answer 2

Obtuse

Question 3

Describe the distofacial cusp ridges of the Maxillary 1st Molar

Answer 3

90 degree angle

Question 4

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

Answer 4

Distofacial cusp

*90 degrees

Question 5

T/F

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

Answer 5

False

*Occlusocervical Facial lingual groove

Question 6

Describe the Occlusocervical Facial Groove of Max 1M

Answer 6

Delineates Mesiofacial and Distofacial

Centered

Slightly angulated toward distal

Question 7

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

Answer 7

Facial

Question 8

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

Answer 8

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

Question 9

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

Answer 9

Occlusal and Parallel to

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

Question 10

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

Answer 10

Cervical 1/3

Question 11

Where is the Cervical Ridge of the Max1M?

Answer 11

Mesial 2/3

Question 12

Describe the Lingual Cusp of the Max1M

Answer 12

Mesiolingual cusp - 60%

Distolingual cusp - 40%

Question 13

Describe the lingual groove of the Max1M

Answer 13

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

Question 14

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

Answer 14

Not as inclined

Question 15

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

Answer 15

Mesial Marginal Ridge Groove

Crosses Mesial Marginal Ridge

Question 16

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

Answer 16

2

*Mesiofacial wider

Question 17

T/F

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

Answer 17

True

Question 18

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

Answer 18

Mesial

Question 19

Describe the Mesiofacial Root of the Max1M

3 things

Answer 19

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

Question 20

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

Answer 20

Facial

Question 21

Why does the Maxillary 1st Molar narrow distally?

Answer 21

Cervical Ridges flatten distally

Question 22

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

Answer 22

Mesiolingual
Mesiofacial
Distolingual
Distofacial
5th

Question 23

What are the 2 major fossae of the Max1M?

Answer 23

Central

Distal

Question 24

What separates the Central and Distal fossae of the Max1M?

Answer 24

Oblique Ridge

Question 25

Describe the Facial Groove of the Max2M

Answer 25

Short | Distal

Question 26

What facial cusp is wider in the Max2M

Answer 26

Mesiofacial wider than Distofacial

Question 27

Describe the Cervical Line in the Max2M

Answer 27

Apical dip midway *otherwise straight

Question 28

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

Answer 28

Mesiocuspal Ridge to the Mesial Outline (which is relatively straight) 115 degrees

Question 29

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

Answer 29

35%

Question 30

Name the cusps that can be seen from the Mesial view of the Max2M What cusp isn't seen?

Answer 30

Mesiofacial Mesiolingual Distofacial Distolingual NOT seen

Question 31

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

Answer 31

2 | of 3

Question 32

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

Answer 32

Convex

Question 33

Describe the Mesial Marginal Ridge of the Max2M | 2 points

Answer 33

Semicircular | No groove

Question 34

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

Answer 34

Mesiofacial and Distolingual Line Angles

Question 35

Which line angles of the Max2M are obtuse?

Answer 35

Distofacial and Mesiolingual

Question 36

Where is the mesiofacial cusp? | Distolingual cusp?

Answer 36

Most facially and mesially placed cusp Most lingually and distally places cusp *More than others because of rhomboid

Question 37

How many cusps are on the Max2M?

Answer 37

4 well-developed

Question 38

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

Answer 38

Mesiofacial | Distolingual

Question 39

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

Answer 39

Mesiofacial | Distolingual

Question 40

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

Answer 40

Triangular Ridge of the Distofacial Cusp Distal Cuspal Ridge of the Mesiolingual Cusp

Question 41

What is the Root to Crown ratio of the Max3M?

Answer 41

2:1

Question 42

List the cusp sizes from largest to smallest in the Max3M

Answer 42

Mesiofacial Mesiolingual Distofacial Distolingual

Question 43

What are the 3 major pits of the Max3M?

Answer 43

Mesial Triangular Distal Triangular Central

Question 44

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

Answer 44

Lingual Groove