Deck 12: Tooth Morphology

Question 1

Which of the following premolar teeth has buccal and a lingual roots?

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

Answer 1

Maxillary first premolar

Question 2

Which of the following teeth vary more in form more than any other teeth in the mouth?

A)Maxillary lateral incisors
B)Mandibular canines
C)Maxillary central incisors
D)Second molars

Answer 2

Maxillary lateral incisors

Question 3

Which of the following teeth are the smallest and most symmetric teeth in the permanent dentition?

A)Maxillary lateral incisors
B)Mandibular central incisors
C)Mandibular canines
D)Maxillary central incisors

Answer 3

Mandibular central incisors

Question 4

Which of the following teeth are usually the last teeth to be lost?

A)Lateral incisors
B)Central incisors
C)Canines
D)Third molars

Question 5

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

A)1, 16, 17, 32
B)3, 14, 19, 30
C)6, 11, 22, 27
D)2, 15, 18, 31

Question 6

Which of the following teeth are sometimes referred to as wisdom teeth?

A)First molars
B)Premolars
C)Third molars
D)Canines

Question 7

Which of the following is true of primary teeth in contrast to permanent teeth?

A)Crowns that are narrower at the cementoenamel junction (CEJ) than permanent teeth.
B)Darker enamel than permanent teeth.
C)Relatively thicker enamel than permanent teeth.
D)A tooth crown that is longer in relation to the total tooth length than is found in permanent teeth.

Question 8

Which of the following is a rounded,raised area on the cervical third of the lingual surface of anterior teeth?

A)Cingulum
B)Fossa
C)Mamelons
D)Marginal ridge

Question 9

How many molars are in each quadrant of the permanent dentition?

A)3
B)4
C)12
D)16

Question 10

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)lingual cusp is larger and almost the same height as the buccal cusp on the maxillary second premolar.
D)second premolar is wider mesiodistally than buccolingually.

Question 11

Which of the following teeth have has a fifth supplemental cusp?

A)Premolars
B)Central incisors
C)Maxillary first molars
D)Maxillary second molars

Question 12

Which of the following adult teeth is nonsuccedaneous?

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

Question 13

Which of the following teeth in the permanent dentition will replace the primary first molars?

A)First molars
B)First and second molars
C)First premolars
D)Second premolars

Question 14

Which of the following permanent maxillary teeth normally have three roots?

A)Incisors
B)Canines
C)Premolars
D)First molars

Question 15

Which of the following is true of the mandibular canine tooth?

A)It is narrower labiolingually and mesiodistally than a maxillary canine.
B)It has a larger and more developed cusp than the maxillary canine does.
C)It has a sharper cusp tip than a maxillary canine does.
D)It has a mesial cusp slope that is longer than the distal cusp slope when it first erupts, whereas the opposite is true for a maxillary canine tooth.

Question 16

The ________ is located where the cusp ridges converge at a central point,where the grooves meet on a posterior tooth.

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

Question 17

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

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

Question 18

How many premolars are there in the primary dentition?

A)0
B)4
C)6
D)8

Question 19

The ________ play an important role in a person's appearance.

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

Question 20

Which of the following teeth is most likely to be out of position in the dental arch?

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

Question 21

The first premolar is anterior to the _____,whereas the second premolar is anterior to the first _____.

A)lateral incisor; molar
B)second premolar; premolar
C)second premolar; molar
D)canine; premolar

Question 22

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

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

Question 23

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

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

Question 24

A common anomaly of the maxillary lateral incisors that is characterized by unusually large open contacts is called:

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

Question 25

How many premolars are in one quadrant of the permanent dentition?

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

Question 26

Which of the following features of the posterior permanent dentition is associated with the termination of triangular grooves?

A)Central fossa
B)Triangular fossa
C)Central groove
D)Inclined cuspal plane

Question 27

Canines are also referred to as:

A)wisdom teeth.
B)eyeteeth.
C)cuspids.
D)bicuspids.

Question 28

What is the canine eminence?

A)A cusp
B)A canus
C)An imbrication line
D)A bony ridge

Question 29

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

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

Question 30

The root of the maxillary lateral incisor is:

A)the same width as the root of the maxillary central incisor.
B)longer than the root of a central incisor.
C)a bifurcated root.
D)the same size as the root of the mandibular lateral incisor.

Question 31

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

A)cusps of second premolars are sharper than 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)maxillary second premolar usually has one root.

Question 32

Which of the following terms is used to describe the rounded enamel extensions on the incisal edge of newly erupted central and lateral incisors?

A)Cusps
B)Mamelons
C)Diastemas
D)Fossas

Question 33

How many canines are in an arch of the permanent dentition?

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

Question 34

Most maxillary first premolars are considered bifurcated because they have a root that is divided into:

A)two roots, buccal and lingual.
B)two roots, mesial and distal.
C)three roots, two mesial and one distal.
D)three roots, two buccal and one lingual.

Question 35

The developmental groove that crosses marginal ridges and allows food to escape during mastication is the _____ groove.

A)marginal
B)triangular
C)central
D)supplemental

Question 36

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 lingual surface of the crown of the maxillary canine is smoother than that of the mandibular canine.
D)The cusp tip is sharper on a maxillary canine than on a mandibular canine.

Question 37

The lingual surfaces of anterior teeth have rounded,raised borders on the mesial and distal surfaces that are called:

A)the cingulum.
B)fossae.
C)marginal ridges.
D)mamelons.

Question 38

The mandibular central incisors are:

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

Question 39

Which of the following is true regarding differences between the maxillary and mandibular central incisors?

A)Mandibular central incisors are larger than the maxillary 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)The cingulum in less prominent on the maxillary central incisors than the cingulum on the mandibular central incisors.
D)The marginal ridges are more prominent on mandibular incisors than they are on maxillary incisors.

Question 40

How many premolars are in each arch of the permanent dentitions?

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

Question 41

In the Universal Numbering System,the four second 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 42

Which of the following types of teeth in the primary dentition are replaced by first premolars in the adult dentition?

A)Incisors
B)Canines
C)First primary molar
D)Second primary molar

Question 43

Premolars and molars are used for _____ food.

A)tearing
B)cutting
C)chewing
D)shearing

Question 44

There are _____ teeth in each arch of the primary dentition.

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

Question 45

Which of the following teeth are the largest and strongest maxillary teeth?

A)First molars
B)Second molars
C)Canines
D)Central incisors