PRDS Quiz

Question 1

At what age does the permanent first mandibular molar erupt?

Answer 1

6-7 Years

Question 2

TRUE OR FALSE: Root formation of the permanent first molar is usually complete when the maxillary first premolar starts to erupt.

Answer 2

True

Question 3

How many cusps does the permanent second mandibular molar usually have?

Answer 3

Four cusps

Question 4

Which of the following statements about the permanent second mandibular molar is correct?

Answer 4

Has characteristically 2 roots, mesial root has 2 canals, Mesiobuccal cusp is most prominent cusp, pulp chamber has 4 horns.

Question 5

Which primary tooth is exfoliated when the mandibular first permanent molar erupts?

Answer 5

None.

Question 6

When comparing the anatomy of the mandibular third molar to that of other mandibular molars, the mandibular third molar is more likely to exhibit:

Answer 6

a more irregular CEJ

Question 7

Which of the following statements is correct with regard to the mandibular third molar?

Answer 7

(All of the above): tooth tapers dramatically from proximal contacts to root apex, root system may be fused, coronal outline is quite rounded in form.

Question 8

From the occlusal view of the mandibular third molar:

Answer 8

the occlusal groove pattern varies considerably.

Question 9

Which of the following is correct regarding the root system of the mandibular third molar?

Answer 9

(All of the above): root system is more compact in form, root system curves towards the distal, the internal and external root morphology varies considerably.

Question 10

Which of the following characteristics of the mandibular third molar is most likely to be similar to the mandibular second molar?

Answer 10

Number of cusps.

Question 11

From the facial view of the mandibular second molar

Answer 11

lingual cusps appear taller and sharper than facial cusps

Question 12

From the facial view of the mandibular second molar (2)

Answer 12

(All of the above): mesial outline of the crown is straighter than the distal outline of the crown, the mesial contact is located at junction of the occlusal and middle thirds of the crown, the distal contact is located in the middle third of the crown

Question 13

From the mesial view of mandibular second molar

Answer 13

The mesiofacial cusp is shorter and more blunt than the mesiolingual cusp

Question 14

From the mesial view of the mandibular second molar (2)

Answer 14

the facial height of contour is near the cervical 1/3 of the crown

Question 15

From the distal view of the mandibular second molar:

Answer 15

(All of the above) All four cusps are visible, more occlusal surface is visible than from the mesial view, the distal cusps are further apart faciolingually than are the mesial cusps

Question 16

From the occlusal view of the mandibular second molar:

Answer 16

(All of the above): the central developmental groove is the longest groove, there are more supplemental grooves than are seen on the first mandibular molar, both proximal contacts are centered faciolingually

Question 17

When comparing the mandibular first and second molars, which of the following features is common to both teeth:

Answer 17

A large central fossa and two triangular fossae

Question 18

When examining the occlusal view of the mandibular first and second molars, which of the following features is common to both teeth?

Answer 18

None of the above. (Eliminates faciolingual position of distal contact, number of cusps, occlusal outline form of the crown)

Question 19

Which of the following developmental grooves is not located on the occlusal surface of the mandibular second molar?

Answer 19

distofacial developmental groove

Question 20

Which of the following statements is correct when examining the cervical cross section of the mandibular second molar?

Answer 20

(All of the above) The root is wider mesiodistally than faciolingually, depressions are usually located on the facial and lingual surfaces of the root, occasionally there may only be one C-shaped canal

Question 21

From the facial view of the mandibular first molar, the root bifurcation is:

Answer 21

distal to the mesiofacial developmental groove

Question 22

From the mesial view of the mandibular first molar, the contact area is:

Answer 22

centered faciolingually

Question 23

From the lingual view of the mandibular first molar

Answer 23

(All of the above) The lingual cusps are taller than the facial cusps, the distal cusp forms the distal height of contour, the roots appear longer than from the facial view

Question 24

When examining the distal view of the mandibular first molar

Answer 24

the contact area is located facial to center on the crown

Question 25

The cusps of the mandibular first molar are ranked in size from largest to smallest

Answer 25

mesiofacial, mesiolingual, distolingual, distofacial, distal

Question 26

on the mandibular first molar

Answer 26

the central developmental groove is the longest developmental groove

Question 27

on the mandibular first molar (2)

Answer 27

the root trunk has a facial and lingual developmental depression

Question 28

on the mandibular first molar (3)

Answer 28

the central fossa is the largest fossa

Question 29

From the distal view of the mandibular first molar

Answer 29

(All of the above) distal root is narrower faciolingually than the mesial root, the distal marginal ridge is shorter faciolingually than the mesial marginal ridge, the facial surface tapers more to the distal than the lingual surface

Question 30

At what age do the mandibular 1 molars’ enamel complete?

Answer 30

2.5 years

Question 31

At what age do mandibular 2nd molar enamel complete?

Answer 31

7-8 years

Question 32

At what age do mandibular 2nd molars complete eruption

Answer 32

11-13 years

Question 33

at what age do mandibular 1 molar roots complete

Answer 33

9-10 years

Question 34

at what age do mandibular 2nd molar roots complete

Answer 34

14-15