Quiz 3 Review

Question 1

Maxillary first molars: which cusps from the facial view are more pointed?

Answer 1

The facial cusps are more pointed than the lingual cusps

Question 2

Maxillary first molars: (Facial) At which angle do the cuspal ridges of the mesiofacial cusp meet?

Answer 2

An obtuse angle

Question 3

Maxillary first molars: (Facial) At what angle do the cuspal ridges of the distofacial cusp meet?

Answer 3

90 degree angle

Question 4

Maxillary first molars: (Facial) the facial groove extends occlusocervically between which two cusps to a point near the center of the facial surface, with a slight angulation at the facial pit location toward the distal?

Answer 4

Extends occlusocervically between the mesiofacial and distofacial cusps

Question 5

Maxillary first molars: (Facial) The facial surface has what extending laterally (both mesially and distally) from the cervical limit of the facial groove?

Answer 5

A slight depression

Question 6

Maxillary first molars: (Facial) T or F, the depression on the facial surface is occlusal to and perpendicular to the cervical ridge

Answer 6

False, it is occlusal to and parallel to the cervical ridge

Question 7

Maxillary first molars: (Facial) The facial surface has vertical facial ridges extending in which direction terminating where?

Answer 7

Extending cervically from the cusp tip of each facial cusp, terminating in the cervical third

Question 8

Maxillary first molars: (Facial) the cervical ridge runs in what direction just occlusal to the cervical line but only in what portion of the crown?

Answer 8

Runs mesiodistally just occlusal to the cervical line but only in the mesial two-thirds of the cervical third of the crown

Question 9

Maxillary first molars: (Facial) The root trunk averages what length?

Answer 9

4 mm

Question 10

Maxillary first molars: (Facial) The distofacial root is ______ and _______ than the mesiofacial root

Answer 10

Straighter and Shorter

Question 11

Maxillary first molars: (Facial) Which root extends apically with a slight mesial curve for what portion of its length? then it curves which direction?

Answer 11

Mesiofacial root extends apically with a slight mesial curve for two-thirds of its length, then curves slightly to the distal

Question 12

Maxillary first molars: (Lingual) Which cusp is well-developed and takes up 40% of the total mesiodistal width of the crown?

Answer 12

The distolingual cusp

Question 13

Maxillary first molars: (Lingual) Distolingual cusp tip can be described as what?

Answer 13

It is so rounded that it is sometimes described as spheroidal

Question 14

Maxillary first molars: (Lingual) T or F, The occlusal outline of the distolingual cusp joins the distal outline of the crown in an arc that is almost that of a semicircle

Answer 14

True

Question 15

Maxillary first molars: (Lingual) The lingual groove begins where? From this origin it slants in which direction?

Answer 15

• Begins at the lingual border of the occlusal table as an extension of the distal oblique groove.
• From this origin between the MESIOLINGUAL and DISTOLINGUAL cusps, it slants cervically and diagonally across the lingual surface until it reaches a position near the center of the mesiodistal width of the surface, then it turns more parallel with the long axis of the tooth.

Question 16

Maxillary first molars: (Mesial) The triangular ridges of what two cusps are not as inclined as what premolars?

Answer 16

• Mesiofacial and Mesiolingual cusps

- Maxillary premolars

Question 17

Maxillary first molars: (Mesial) Which groove crosses the mesial marginal ridge and travels slightly onto the mesial surface and is lined up with the vertical long axis of the tooth

Answer 17

A mesial marginal groove

Question 18

Maxillary first molars: (Mesial) Root trunk is slightly shorter on what aspect of the facial view?

Answer 18

On the mesial aspect

Question 19

Maxillary first molars: (Mesial) How many of the roots of this tooth are visible from the mesial view and why?

Answer 19

• Only two of the three roots are visible

- Since the mesiofacial root is much wider faciolingually and slightly longer than the distofacial root

Question 20

Maxillary first molars: (Mesial) Which root surface shows a concavity in the trifurcation area?

Answer 20

The mesial root surface

Question 21

Maxillary first molars: (Mesial) the outline of which root often extends facially in its middle one-third almost beyond the greatest projection of the crown?

Answer 21

The facial outline of the mesiofacial root

Question 22

Maxillary first molars: (Mesial) In which third of the root does the mesiofacial root curve lingually to a relatively blunt apex that is approximately in line with the tip of the mesiofacial cusp?

Answer 22

The middle third

Question 23

Maxillary first molars: (Distal) The crown of this tooth is narrower in what half of the tooth?

Answer 23

Distal half

Question 24

Maxillary first molars: (Distal) It is possible to see much of what surface when viewing the tooth from the distal aspect?

Answer 24

Facial surface

Question 25

Maxillary first molars: (Distal) There is a shallow, but consistent root surface depression that extends from what third of the root across the cervical line onto what third of the crown?

Answer 25

Cervical third of the root across the cervical line onto the cervical third of the crown.

Question 26

Maxillary first molars: (Distal) the distal depression seen on maxillary first molars makes clinicians be careful why?

Answer 26

They must be careful to restore class II preparations on this surface or be mindful of calculus deposits that may engulf the depression, making the calculus difficult to remove.

Question 27

Maxillary first molars: (Occlusal) The cusp sizes in order from largest to smallest

Answer 27

Mesiolingual cusp (very large), mesiofacial, distolingual, distofacial and fifth (Carabelli's) in that order

Question 28

Maxillary first molars: (Occlusal) There are how many major fossae located on either side of the mid-point of the oblique ridge

Answer 28

2 major fossae, they are named the central fossa and the ditsal fossa

Question 29

Maxillary first molars: (Occlusal) the cusp sizes in order from smallest to largest

Answer 29

``` Fifth cusp (Carabelli) Distofacial Distolingual Mesiofacial Mesiolingual (Very large) ```

Question 30

Maxillary Second Molars: (Facial) The facial groove is what in comparison to the maxillary first molar?

Answer 30

Short and more distally positioned, especially in comparison to the maxillary first molar

Question 31

Maxillary Second Molars: (Facial) Which cusp is wider between the mesiofacial and distofacial

Answer 31

Mesiofacial cusp is wider than the distofacial cusp

Question 32

Maxillary Second Molars: (Facial) Cervical line is what shape from mesial to distal, except for what?

Answer 32

Cervical line is straight across from mesial to distal, except for an apical dip in the mid-point area of the crown

Question 33

Maxillary Second Molars: (Lingual) At what degree angle does the mesial cuspal ridge of the mesiolingual cusp meet the relatively straight mesial outline of the crown?

Answer 33

At a 115 degree angle. NOT 90 DEGREES

Question 34

Maxillary Second Molars: (Lingual) Which cusp is well developed and takes up 35% of total mesiodistal width of the crown?

Answer 34

Distolingual cusp

Question 35

Maxillary Second Molars: (Mesial) A portion of how many cusp tips can be seen from the mesial aspect and which ones are they?

Answer 35

3 of the four cusp tips | - Mesiofacial, Mesiolingual and Distofacial

Question 36

Maxillary Second Molars: (Mesial) The facial and lingual outlines of the crown are both what? Concave or Convex?

Answer 36

Convex

Question 37

Maxillary Second Molars: (Mesial) The mesial marginal ridge outline displays what type of an outline devoid of what?

Answer 37

A semicircular curvature, devoid of a groove

Question 38

Maxillary Second Molars: (Occlusal) How many cusps are well-developed from this view?

Answer 38

4

Question 39

Maxillary Second Molars: (Occlusal) Which cusp is the most facially and mesially placed cusp?

Answer 39

The mesiofacial cusp

Question 40

Maxillary Second Molars: (Occlusal) List the order of cusp sizes from largest to smallest

Answer 40

Mesiolingual Mesiofacial Distofacial Distolingual

Question 41

Maxillary Third Molars: (Mesial) The crown to root ratio in length. Is this significant for molars?

Answer 41

Crown to Root ratio: 1:2 | The root is only twice the length of the crown, which is short for molars

Question 42

Maxillary Third Molars: (Occlusal) The four cusps in order from largest to smallest

Answer 42

Mesiofacial Mesiolingual Distofacial Distolingual

Question 43

Maxillary Second Molars: (Occlusal) The cusps of second molar from smallest to largest in size

Answer 43

Distolingual Distofacial Mesiofacial Mesiolingual

Question 44

Maxillary Third Molars: (Occlusal) What are the major pits of the third molars?

Answer 44

Central, Mesial and distal triangular

Question 45

Maxillary Third Molars: (Occlusal) T or f, A definite lingual groove is evident and separates the mesiolingual and distolingual cusps

Answer 45

False, it is not evident that separates the mesiolingual and distolingual cusps