Deck 17: Permanent Posterior Teeth

Question 1

What is the developmental disturbance that causes a peg molar?

A) Serious infection
B) Microdontia
C) Impaction
D) Supernumerary involvement

Answer 1

Microdontia

Question 2

Which of the following terms correctly describes a cusp ridge that descends from the cusp tips toward the central part of an occlusal table?

A) Transverse ridge
B) Triangular ridge
C) Marginal ridge
D) Oblique ridge

Answer 2

Triangular ridge

Question 3

Which of the following permanent teeth are usually the first to erupt into the oral cavity?

A) Maxillary central incisors
B) Mandibular central incisors
C) Maxillary first premolars
D) Mandibular first molars

Answer 3

Mandibular first molars

Question 4

The root of tooth #13 is usually completed between _____ years.

A) 8 and 9
B) 9 and 10
C) 10 and 12
D) 12 and 14

Question 5

Which of the following features helps distinguish the permanent right permanent maxillary second premolar from the left?

A) Mesial marginal groove present
B) Differing position of contact areas
C) Lingual cusp offset to mesial
D) Central groove shorter on its mesial part

Question 6

The mesial marginal ridge of the permanent mandibular second premolar is ____ degrees to the long axis of the tooth.

A) 25
B) 45
C) 60
D) 90

Question 7

How many pulp horns does the permanent mandibular second molar have?

A) Two
B) Four
C) Five
D) Six

Question 8

Which of the following can cause patients to have problems performing adequate home care on the permanent mandibular premolars?

A) Narrow lingual surfaces
B) Buccal crown inclination
C) Lingual crown inclination
D) Wide lingual surfaces

Question 9

Which of the following permanent molars have the highest prevalence of root fusion?

A) Maxillary second molars
B) Mandibular second molars
C) Maxillary first molars
D) Mandibular first molars

Question 10

Which of the following permanent teeth can have a lingual pit that is at risk for caries?

A) Maxillary first premolar
B) Mandibular first premolar
C) Maxillary first molar
D) Mandibular first molar

Question 11

What is the approximate percentage of times that the permanent maxillary first premolar has one root?

A) 20%
B) 50%
C) 47%
D) 100%

Question 12

The permanent dentition has only ____ types of molars; the primary dentition only has two types.

A) one
B) two
C) three
D) four

Question 13

The crown outline from an occlusal view of the permanent mandibular first premolar is:

A) diamond shaped.
B) rhomboidal.
C) pentagonal.
D) ovoid shaped.

Question 14

Which of the following teeth have two forms that involve either a three-cusp type or a two-cusp type?

A) #13
B) #20
C) #21
D) #28

Question 15

Which of the following is not a root that can be found on a permanent maxillary molar?

A) Mesial
B) Mesiobuccal
C) Palatal
D) Distobuccal

Question 16

Which cusp on the permanent maxillary second molar shows the most variability?

A) Distobuccal cusp
B) Distolingual cusp
C) Mesiobuccal cusp
D) Distobuccal cusp..

Question 17

Which surface of the permanent maxillary first molars may have increased supragingival tooth deposits?

A) Mesiobuccal
B) Distobuccal
C) Palatal
D) Occlusal

Question 18

The eruption of tooth #29 usually occurs between _____ years.

A) 7 and 8
B) 8 and 9
C) 9 and 10
D) 11 and 12

Question 19

Which of the following is a unique feature of most permanent maxillary molars?

A) Transverse ridge
B) Central groove
C) Furcations
D) Oblique ridge

Question 20

Which of the following permanent teeth has the greatest mesiodistal width of any tooth in the oral cavity?

A) #2
B) #14
C) #19
D) #31

Question 21

How many triangular grooves are present on a permanent maxillary first molar?

A) Two
B) Three
C) Four
D) Five

Question 22

How many pulp horns does the permanent maxillary second molar usually have?

A) Two
B) Three
C) Four
D) Five

Question 23

The crown outline of the permanent mandibular first molar from an occlusal view is:

A) rhomboidal.
B) cuboidal.
C) pentagonal.
D) triangular.

Question 24

Which of the following teeth has a much smaller and nonfunctioning lingual cusp as compared to its buccal cusp?

A) #4
B) #12
C) #13
D) #21

Question 25

Which of the following needs to be considered when dealing with a possible infection due to the location of the roots of the permanent maxillary premolars?

A) Ludwig angina
B) Maxillary sinusitis
C) Syphilis
D) Rubella

Question 26

Which of the following features help with distinguishing a right permanent mandibular first premolar from a left?

A) The mesial cusp slope of the buccal cusp is shorter than the distal cusp slope.
B) The cementoenamel curvature is more occlusal on the distal surface.
C) The mesiolingual groove can be seen near the buccal margin.
D) The mesial marginal ridge is nearly perpendicular to the transverse ridge angulation at a more cervical level.

Question 27

Where is the mesial furcation usually located on a permanent maxillary first molar?

A) One third of way in from the mesial aspect
B) One third of the way across the distal surface from the buccal aspect
C) Two thirds of the way in from the lingual aspect
D) Two thirds of the way across the mesial surface from the buccal aspect

Question 28

Where are the root branches located on tooth #12?

A) Cervical third
B) Middle third
C) Apical third
D) This tooth does not have root branches

Question 29

Which of the following permanent molars is the largest in both dental arches?

A) First molar
B) Second molar
C) Third molar
D) All molars are about the same size.

Question 30

Which of the following teeth are the succedaneous replacements for the primary maxillary first molars?

A) Maxillary first premolars
B) Maxillary second premolars
C) Maxillary first molars
D) Maxillary second molars