Question 1

Each mamelon forms the incisal edge of one of the primary labial lobes of the incisors. With wear, the rounded incisal edge becomes flat and is then referred to the incisal ridge.

Accepted Answer

A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. 
A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. D

Question 2

Maxillary central incisors usually develop normally. Two anomalies that sometimes occur are a longer root or a shorter crown.

Accepted Answer

A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. 
A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. B

Question 3

Each of the following is true of the permanent central incisor EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)  Evidence of calcification occurs at three months. 
B)  This is the widest mesiodistally of any of the anterior teeth. 
C)  Root formation is completed by six years of age. 
D)  Gemination is an anomaly that sometimes occurs. 
E)  Development is usually normal. 
A)  Evidence of calcification occurs at three months. 
B)  This is the widest mesiodistally of any of the anterior teeth. 
C)  Root formation is completed by six years of age. 
D)  Gemination is an anomaly that sometimes occurs. 
E)  Development is usually normal. C

Question 4

Proximal grooves are commonly found on the roots of the maxillary incisors.

Accepted Answer

A) True 
 B)False

Question 5

Which incisor is not derived from four primary lobes?

Accepted Answer

A)  Maxillary central 
B)  Maxillary lateral 
C)  Mandibular central 
D)  Mandibular lateral 
E)  All of the above are derived from four lobes. 
A)  Maxillary central 
B)  Maxillary lateral 
C)  Mandibular central 
D)  Mandibular lateral 
E)  All of the above are derived from four lobes.

Question 6

Which of the following are characteristic of one or both mandibular incisors (select all that apply)?

Accepted Answer

A)  All contact areas are in incisal third 
B)  Rounded distoincisal angle 
C)  Smooth, shallow lingual surface 
D)  Slender roots 
A)  All contact areas are in incisal third 
B)  Rounded distoincisal angle 
C)  Smooth, shallow lingual surface 
D)  Slender roots

Question 7

Maxillary lateral incisors vary in form more than any other teeth in the mouth.

Accepted Answer

A) True 
 B)False

Question 8

Mandibular lateral incisors are generally smaller than mandibular central incisors. Mandibular lateral incisors have greater facial curvature than the central incisors.

Accepted Answer

A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. 
A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false.

Question 9

All incisors can erupt with mamelons.

Accepted Answer

A) True 
 B)False

Question 10

Mandibular lateral incisors are distolingually inclined when viewed incisally.

Accepted Answer

A) True 
 B)False

Question 11

The eruption time for both the maxillary central incisor and mandibular lateral incisor is

Accepted Answer

A)  6 to 7 years 
B)  7 to 8 years 
C)  8 to 9 years 
D)  None of the above 
A)  6 to 7 years 
B)  7 to 8 years 
C)  8 to 9 years 
D)  None of the above

Question 12

Which anatomical landmark could make an incisor more prone to dental caries?

Accepted Answer

A)  Cingulum 
B)  Lingual pit 
C)  Mamelons 
D)  Prominent marginal ridges 
A)  Cingulum 
B)  Lingual pit 
C)  Mamelons 
D)  Prominent marginal ridges

Question 13

Extracted mandibular central incisors are the easiest to identify as either right or left because they are located anteriorly and near the midline.

Accepted Answer

A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct, but the reason is NOT correct. 
D)  The statement is NOT correct, but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct. 
A)  Both the statement and the reason are correct and related. 
B)  Both the statement and the reason are correct but are NOT related. 
C)  The statement is correct, but the reason is NOT correct. 
D)  The statement is NOT correct, but the reason is correct. 
E)  NEITHER the statement NOR the reason is correct.

Question 14

Gemination is an anomaly that most commonly occurs in mandibular incisors.

Accepted Answer

A) True 
 B)False

Question 15

Each of the following statements correctly describes maxillary lateral incisors EXCEPT one. Which is the EXCEPTION?

Accepted Answer

A)  The incisal aspect can resemble that of a central incisor or a canine. 
B)  Incisally, they exhibit more convexity both labially and lingually than maxillary centrals. 
C)  Of all incisors, the maxillary laterals vary the least in form. 
D)  The mesial aspect of a maxillary lateral incisor is similar to that of a small central incisor. 
E)  Frequently maxillary lateral incisors are peg-shaped. 
A)  The incisal aspect can resemble that of a central incisor or a canine. 
B)  Incisally, they exhibit more convexity both labially and lingually than maxillary centrals. 
C)  Of all incisors, the maxillary laterals vary the least in form. 
D)  The mesial aspect of a maxillary lateral incisor is similar to that of a small central incisor. 
E)  Frequently maxillary lateral incisors are peg-shaped.

Question 16

In an anterior crossbite, the maxillary central incisors would exhibit wear in which location?

Accepted Answer

A)  Labioincisal edge 
B)  Linguloincisal edge 
C)  Cervical region 
D)  Apex 
A)  Labioincisal edge 
B)  Linguloincisal edge 
C)  Cervical region 
D)  Apex

Question 17

Which of the following are commonly found on roots of maxillary incisors?

Accepted Answer

A)  Proximal grooves 
B)  Evidence of division 
C)  Bifurcation 
D)  Indentation 
E)  None of the above 
A)  Proximal grooves 
B)  Evidence of division 
C)  Bifurcation 
D)  Indentation 
E)  None of the above

Question 18

All incisors have two marginal ridges, a cingulum, and a lingual fossa. The mandibular central incisor has the least distinct lingual anatomy.

Accepted Answer

A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. 
A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false.

Question 19

Which incisor has a lingual pit?

Accepted Answer

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

Question 20

The maxillary lateral incisor usually has a straight, thick, cylindrically shaped root. The root length of the maxillary lateral incisor is about 1.5 times the length of the crown.

Accepted Answer

A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false. 
A)  Both statements are true. 
B)  The first statement is true; the second is false. 
C)  The first statement is false; the second is true. 
D)  Both statements are false.

Exam 12: Incisors

Each mamelon forms the incisal edge of one of the primary labial lobes of the incisors. With wear, the rounded incisal edge becomes flat and is then referred to the incisal ridge.

Maxillary central incisors usually develop normally. Two anomalies that sometimes occur are a longer root or a shorter crown.

Each of the following is true of the permanent central incisor EXCEPT one. Which one is the EXCEPTION?

Proximal grooves are commonly found on the roots of the maxillary incisors.

Which incisor is not derived from four primary lobes?

Which of the following are characteristic of one or both mandibular incisors (select all that apply)?

Maxillary lateral incisors vary in form more than any other teeth in the mouth.

Mandibular lateral incisors are generally smaller than mandibular central incisors. Mandibular lateral incisors have greater facial curvature than the central incisors.

All incisors can erupt with mamelons.

Mandibular lateral incisors are distolingually inclined when viewed incisally.

The eruption time for both the maxillary central incisor and mandibular lateral incisor is

Which anatomical landmark could make an incisor more prone to dental caries?

Extracted mandibular central incisors are the easiest to identify as either right or left because they are located anteriorly and near the midline.

Gemination is an anomaly that most commonly occurs in mandibular incisors.

Each of the following statements correctly describes maxillary lateral incisors EXCEPT one. Which is the EXCEPTION?

In an anterior crossbite, the maxillary central incisors would exhibit wear in which location?

Which of the following are commonly found on roots of maxillary incisors?

All incisors have two marginal ridges, a cingulum, and a lingual fossa. The mandibular central incisor has the least distinct lingual anatomy.

Which incisor has a lingual pit?

The maxillary lateral incisor usually has a straight, thick, cylindrically shaped root. The root length of the maxillary lateral incisor is about 1.5 times the length of the crown.

Oral Cavity

The Tooth: Functions and Terms

Fundamental and Preventive Curvatures

Dentition

Development, Form, and Eruption

Occlusion

Dental Anomalies

Supporting Structures

Clinical Considerations

Tooth Identification

Root Morphology

Canines

Premolars

Molars

Deciduous Dentition

Basic Tissues

Development of Orofacial Complex

Dental Lamina and Enamel Organ

Enamel, Dentin, and Pulp

Root Formation and Attachment Apparatus

Eruption and Shedding of Teeth

Oral Mucous Membrane

The Tongue

Salivary Glands

Osteology of the Skull

Nose, Nasal Cavity, and Paranasal Sinuses

Muscles of Mastication, Hyoid Muscles, and Sternocleidomastoid and Trapezius Muscles

Temporomandibular Joint

Muscles of Facial Expression

Soft Palate and Pharynx

Arterial Supply and Venous Drainage

Salivary Glands

Nervous System

Lymphatics and Spread of Dental Infection

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