Deck 5: Development, Form, and Eruption

Question 1

Which choice best indicates the years of eruption for all of the premolars?

A) 8-10
B) 9-11
C) 10-12
D) 11-13

Answer 1

C
The first premolars erupt at 10-11 years of age. The second premolars erupt at 10-12 years of age with eruption of the maxillary teeth preceding the mandibular. This unique pattern is the most common exception to the rule that mandibular teeth erupt prior to their maxillary counterparts.

Question 2

Edentulous refers to

A) The final dentition period
B) A space maintainer
C) Absence of teeth
D) Unerupted third molars

Answer 2

C
Edentulous means that all teeth are missing. A space maintainer is an appliance utilized to preserve space for either premature loss of a deciduous tooth or loss of any tooth. Unerupted third molars are considered impacted if they remain embedded in bone or soft tissue and fail to erupt.

Question 3

An impacted tooth is one that has

A) Not erupted fully
B) No tooth germs
C) Less cusps or roots
D) To be extracted
E) Both a and c

Answer 3

A
Impacted teeth are those that do not completely erupt but remain embedded in bone or soft tissue. There are varying degrees of impaction.

Question 4

The first deciduous teeth, the mandibular central incisors, erupt at approximately 6.5 to 7 months. The first permanent teeth, the maxillary premolars, erupt at approximately 6 years of age.

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

Question 5

Which is the last permanent incisor to erupt?

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

Question 6

Another name for the wearing away of the tooth through contact with an opposing tooth is

A) Exfoliation
B) Attrition
C) Impaction
D) Resorption

Question 7

A 6-year-old has a space maintainer on the area of the deciduous mandibular left first molar. Which permanent tooth will erupt in the space?

A) First premolar
B) Second premolar
C) First molar
D) Second molar

Question 8

Bicuspid is not an accurate name for premolars. Premolars can have two, three, or four cusps.

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

Question 9

The most common exception to the rule of eruption that mandibular teeth precede eruption of maxillary teeth is the maxillary first premolar because this tooth often precedes eruption of its mandibular counterpart.

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 10

Which of the following selections include teeth that should be present in the dentition of a 3-year-old child (select all that apply)?

A) Primary maxillary and mandibular canines
B) Primary maxillary and mandibular central incisors
C) Primary maxillary molars, but NOT primary mandibular molars
D) Primary mandibular central and lateral incisors, but NOT primary mandibular incisors
E) Primary mandibular and maxillary premolars

Question 11

Small clumps of cells that will later form teeth are called

A) Tooth germs
B) Ameloblasts
C) Lobes
D) Tubercles

Question 12

The rounded protuberances on the incisal edge of a newly erupted incisor are called

A) Mamelons
B) Developmental grooves
C) Cusp tips
D) Tooth buds
E) Attrition

Question 13

Exfoliation is the process by which the roots of a deciduous tooth are pushed together by the calcification process. Resorption is the phenomenon where osteoblasts destroy the roots of primary teeth.

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

Question 14

Which of the following selections include teeth that should have erupted or may be in the process of eruption in the dentition of an 8-year-old child (select all that apply)?

A) All deciduous teeth
B) Permanent maxillary central and lateral incisors
C) Permanent maxillary and mandibular first molars
D) Permanent canines

Question 15

It is unusual for a 3-year-old child to have all twenty primary teeth because second molars do not typically erupt until 4 years of age.

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 16

Roots of primary teeth resorb and dissolve because odontoblasts destroy the surrounding bone.

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 17

A 15-month-old toddler would generally have (select all that apply):

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

Question 18

Formation of teeth can be affected by nutritional deficiencies, fever, or childhood illnesses. While trauma to the dentition may delay eruption, it does not negatively impact formation of teeth.

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

Question 19

Maxillary molars have three major buccal cusps because the third buccal cusp develops from the lobe of Carabelli.

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 20

Permanent mandibular central incisors are the first succedaneous teeth to erupt. The earliest visible portion of an anterior tooth is the cusp of Carabelli, the name for the lingual lobe of mandibular central incisors.

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

Question 21

The crypt will become the tooth socket.

Question 22

Third molar roots continue to calcify until about 25 years of age.

Question 23

Calcification of all deciduous teeth begins near the end of the sixth month in utero.

Question 24

A developmental groove separates one cusp from another.

Question 25

A 10-year-old will generally have which of the following permanent teeth (select all that apply)?

A) Maxillary lateral incisors
B) Maxillary canines
C) Mandibular canines
D) Mandibular second premolars
E) Mandibular first molars

Question 26

A tooth with two cusps, such as a maxillary premolar, was formed from two lobes.

Question 27

Third molars are the most unpredictable of all teeth.