Deck 12: Tooth Morphology

Question 1

Using the Universal/National Teeth-Numbering System,what are the numbers for the permanent third molars?

A)1, 16, 17, 32
B)3, 14, 19, 30
C)1, 2, 3, 4
D)2, 15, 18, 31

Answer 1

1, 16, 17, 32

Question 2

The primary dentition has _____ molars and _____ premolars.

A)8; 0
B)12; 8
C)8; 4
D)4; 4

Answer 2

8; 0

Question 3

The maxillary second premolar differs from the maxillary first premolar in that the:

A)distobuccal cusp slope is shorter than the mesiobuccal cusp slope on the second premolar.
B)cusps of the maxillary first premolar are not as sharp as the maxillary second premolar.
C)second premolar has only one root, and therefore only one root canal.
D)second premolar is wider mesiodistally than buccolingually.

Answer 3

second premolar has only one root, and therefore only one root canal.

Question 4

Characteristics of the primary dentition include:

A)relatively large pulp chambers.
B)darker enamel.
C)relatively thicker enamel.
D)a tooth crown that is longer in relation to the total tooth length.

Question 5

There are _____ molars in the permanent dentition.

A)8
B)4
C)16
D)12

Question 6

A _____ is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet.

A)pit
B)fossa
C)fissure
D)developmental groove

Question 7

The third molars and the _____ vary in form more than any other teeth in the mouth.

A)maxillary lateral incisors
B)mandibular canines
C)maxillary central incisors
D)second molars

Question 8

The cusp of Carabelli is found on the:

A)premolars.
B)central incisors.
C)maxillary first molars.
D)maxillary second molars.

Question 9

The primary teeth are classified in the Universal/National System using:

A)numbers 1 through 20.
B)letters A through T.
C)a number for each quadrant and a number for each tooth.
D)numbers inside a bracket.

Question 10

The _____ often appear as a developmental anomaly,differing in size,shape,contour,and relative position.

A)maxillary central incisors
B)mandibular incisors
C)mandibular first and second molars
D)maxillary and mandibular third molars

Question 11

The _____ are sometimes referred to as "wisdom" teeth.

A)first molars
B)premolars
C)third molars
D)canines

Question 12

A mandibular canine tooth:

A)usually erupts before the maxillary canine.
B)has a larger and more developed cusp than the maxillary canine.
C)has a sharper cusp tip than a maxillary canine.
D)has a mesial cusp slope that is longer than the distal cusp slope when it first erupts, while the opposite is true for a maxillary canine tooth.

Question 13

The _____ premolar has two bifurcated roots.

A)mandibular first
B)maxillary first
C)maxillary second
D)mandibular second

Question 14

The permanent _____ replace the primary first and second molars.

A)first molars
B)first and second molars
C)canines
D)premolars

Question 15

The rounded enamel extensions on the incisal ridge of newly erupted central and lateral incisors are called:

A)a cingulum.
B)a fossa.
C)mamelons.
D)a marginal ridge.

Question 16

The smallest teeth in the permanent dentition are the:

A)maxillary lateral incisors.
B)mandibular central incisors.
C)mandibular canines.
D)maxillary central incisors.

Question 17

Permanent maxillary molars have _____ roots.

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

Question 18

Which of the following adult teeth is nonsuccedaneous?

A)Maxillary left second premolar
B)Maxillary right canine
C)Mandibular left second molar
D)Mandibular right lateral incisor

Question 19

The _____ are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches.

A)lateral incisors
B)central incisors
C)canines
D)third molars

Question 20

The size,shape,color,and position of the _____ directly relate to how a person looks.

A)molars
B)posterior teeth
C)premolars
D)anterior teeth

Question 21

The difference(s) between the maxillary and mandibular central incisors is(are) the:

A)maxillary central incisors are larger than the mandibular central incisors in all dimensions.
B)labial surfaces of the maxillary central incisors are more rounded from the incisal aspect than those of the mandibular central incisors.
C)cingulum in less prominent on the maxillary central incisors than the cingulum on the mandibular central incisors.
D)both a and b.

Question 22

In the Universal Numbering System,the maxillary permanent premolars are:

A)#4, #5, #12, and #13.
B)#14, #15, #24, and #25.
C)#20, #21, #28, and #29.
D)#34, #35, #44, and #45.

Question 23

The raised border on the mesial and distal surfaces of the lingual surface of anterior teeth is the:

A)cingulum.
B)fossa.
C)marginal ridge.
D)mamelon.

Question 24

Which statement is NOT true of the maxillary canines?

A)The maxillary canines are usually the last permanent anterior teeth to erupt.
B)The canines have incisal edges similar to other anterior teeth.
C)The crown of the maxillary canine is in longer than the crown of the mandibular canine.
D)The cusp tip is sharper on a maxillary canine than on a mandibular canine.

Question 25

A common anomaly of the maxillary lateral incisors that is characterized by the tooth being abnormally pointed or tapered in shape is called:

A)pegged laterals.
B)barrel laterals.
C)fused laterals.
D)dens in dente.

Question 26

The developmental groove that extends mesiodistally and divides the occlusal table in half is the _____ groove.

A)marginal
B)triangular
C)central
D)none of the above

Question 27

The maxillary second premolar differs from the maxillary first premolar in that the:

A)cusps of second premolars are not as sharp as those of first premolars.
B)first premolar is more narrow buccolingually than mesiodistally.
C)lingual cusp is smaller than the buccal cusp on the maxillary second premolar.
D)all of the above.

Question 28

Most maxillary first premolars are considered to be ______ because they have a root that is divided into two roots.

A)succedaneous
B)bifurcated
C)trifurcated
D)bicanineate

Question 29

The bony ridge over the labial portion of the roots of the canines that helps to form the facial contours is the:

A)cusp.
B)canus.
C)imbrication line.
D)canine eminence.

Question 30

An unusually large space between adjacent teeth is known as a:

A)cusp.
B)mamelon.
C)diastema.
D)fossa.

Question 31

There are how many premolars in the permanent dentition?

A)2
B)4
C)6
D)8

Question 32

How many canines are in a quadrant of the permanent dentition?

A)1
B)2
C)4
D)8

Question 33

The area where the cusp ridges converge at a central point on the occlusal surfaces of posterior teeth is the:

A)central fossa.
B)triangular fossa.
C)central groove.
D)triangular groove.

Question 34

The incisal surface of an anterior tooth is also known as the:

A)facial surface.
B)labial surface.
C)incisal edge.
D)incisal ridge.

Question 35

Canines are also referred to as:

A)wisdom teeth.
B)eyeteeth.
C)cuspids.
D)both b and c.

Question 36

There are how many incisors in each arch of the permanent dentitions?

A)2
B)4
C)6
D)8

Question 37

The root of the maxillary lateral incisor:

A)is the same width as the root of the maxillary central incisor.
B)may curve slightly to the distal.
C)is a bifurcated root.
D)is the same size as the root of the mandibular lateral incisor.

Question 38

The first premolar is posterior to the _____ while the second premolar is anterior to the _____.

A)lateral incisor, second molar
B)canine, first molar
C)second premolar, first molar
D)canine, first premolar

Question 39

The mandibular lateral incisors are:

A)larger than the maxillary lateral incisors.
B)larger than the mandibular central incisors.
C)larger than the mandibular canines.
D)smaller than the mandibular central incisors.

Question 40

The root of the mandibular second premolar is ______ than that of a mandibular first premolar,but ______ than the roots of the maxillary premolars.

A)smaller; longer
B)smaller; shorter
C)longer; shorter
D)shorter; longer

Question 41

The largest and strongest teeth in the maxillary dentition are the maxillary:

A)first molars.
B)second molars.
C)canines.
D)central incisors.

Question 42

There are no ______ in the primary dentition.

A)incisors
B)canines
C)premolars
D)molars

Question 43

In the Universal Numbering System,the four first permanent molars are:

A)#16, #26, #36, and #46.
B)#2, #15, #18, and #31.
C)#3, #14, #19, and #30.
D)#18, #28, #38, and #48.

Question 44

Premolars and molars are used for _____ food.

A)tearing
B)cutting
C)grinding
D)all of the above

Question 45

There are ___ teeth in a quadrant of the primary dentition.

A)5
B)10
C)20
D)8