Question 1

_____ are enamel-forming cells.

Accepted Answer

A)  Osteoblasts
B)  Odontoblasts
C)  Cementoblasts
D)  AmeloblastsE) A) and B)
F) B) and D)

Question 2

Each tooth develops from its own tooth bud,which develops during the ____ stage of tooth development.

Accepted Answer

A)  bud
B)  bell
C)  cap
D)  none of the aboveE) A) and B)
F) A) and C)

Question 3

The process of tooth formation is:

Accepted Answer

A)  odontogenesis.
B)  calcification.
C)  eruption.
D)  exfoliation.E) All of the above
F) A) and D)

Question 4

What is the difference between secondary dentin and tertiary dentin?

Accepted Answer

A)  Secondary dentin forms before the tooth erupts and continues forming during the life of the tooth while tertiary dentin forms after eruption, making up the bulk of the tooth.
B)  Secondary dentin forms after the tooth is erupted as a response to trauma, while tertiary dentin appears within the wall of the pulp chambers.
C)  Secondary dentin forms after the tooth erupts, forming the bulk of the tooth, while tertiary dentin forms as a response to trauma.
D)  Secondary dentin forms on the apical half of the root, while tertiary dentin forms within the wall of the pulp chambers.E) None of the above
F) All of the above

Question 5

The tapered end of each root tip is known as the:

Accepted Answer

A)  anatomic crown.
B)  clinical crown.
C)  apex.
D)  CEJ.E) All of the above
F) A) and C)

Question 6

The tough,light pink,keratinized tissue that covers the hard palate and includes the attached gingiva is _____ mucosa.

Accepted Answer

A)  specialized
B)  lining
C)  gingival
D)  masticatoryE) A) and C)
F) None of the above

Question 7

The embedded portions of the periodontal ligament fibers that connect the cementum of the tooth and the bone are called:

Accepted Answer

A)  Sharpey's fibers.
B)  gingival fibers.
C)  interradicular fibers.
D)  lamina dura.E) B) and C)
F) A) and B)

Question 8

The _____ within the periodontium.

Accepted Answer

A)  cementum connects the alveolar bone and periodontal ligaments
B)  alveolar bone connects the cementum and periodontal ligaments
C)  periodontal ligaments connect the cementum and alveolar bone
D)  cemento-enamel junction connects the alveolar bone and periodontal ligamentsE) C) and D)
F) A) and D)

Question 9

The primary dentition will begin to form during the _____ month of gestation.

Accepted Answer

A)  second
B)  fourth
C)  sixth
D)  eighthE) A) and B)
F) A) and C)

Question 10

Which statement is NOT true of succedaneous teeth?

Accepted Answer

A)  Succedaneous teeth are permanent teeth.
B)  Succedaneous teeth begin forming at 12 to 14 weeks of gestation.
C)  Succedaneous teeth are only permanent molars.
D)  Succedaneous teeth form during the cap stage of tooth development.E) A) and B)
F) A) and C)

Question 11

Which statement is NOT true about teratogens?

Accepted Answer

A)  Teratogens may cause birth defects.
B)  Drinking alcohol during pregnancy is considered a teratogen.
C)  Taking antibiotics during pregnancy could be considered a teratogen.
D)  Women of childbearing years should avoid teratogens after the second month of pregnancy.E) All of the above
F) A) and D)

Question 12

The attachment apparatus that retains the tooth in its functional position in the jaw includes the:

Accepted Answer

A)  alveolar bone.
B)  cementum.
C)  periodontal ligaments.
D)  all of the above.E) None of the above
F) All of the above

Question 13

The face begins to develop during the _____ week of pregnancy.

Accepted Answer

A)  first
B)  fourth
C)  eighth
D)  twelfthE) None of the above
F) B) and D)

Question 14

Variations in the shades or coloring of enamel are caused by _____ the enamel.

Accepted Answer

A)  differences in the thickness of
B)  translucency of
C)  color of the dentin beneath
D)  all of the aboveE) All of the above
F) B) and C)

Question 15

The root of the tooth is covered with:

Accepted Answer

A)  cementum.
B)  dentin.
C)  enamel.
D)  pulp.E) All of the above
F) A) and D)

Question 16

The teeth develop in which sequence?

Accepted Answer

A)  Mandibular anterior then mandibular posterior
B)  Maxillary anterior then maxillary posterior
C)  Mandibular anterior then maxillary anterior
D)  Maxillary anterior then mandibular posteriorE) All of the above
F) None of the above

Question 17

When are the first signs of tooth development found in the anterior mandibular region of the developing embryo?

Accepted Answer

A)  Six weeks after the baby is born
B)  During the third trimester of pregnancy
C)  When the embryo is five to six weeks old
D)  At three months of ageE) A) and B)
F) A) and C)

Question 18

Which of the following statements is true concerning developmental disturbances during tooth formation?

Accepted Answer

A)  During prenatal tooth development, the environmental factor that is most often of concern is tooth and jaw size.
B)  During prenatal tooth development, the genetic factor that is most often of concern is tooth and jaw size.
C)  Developmental disturbances can be caused by genetic but not environmental factors.
D)  Developmental disturbances can be caused by environmental but not genetic factors.E) B) and D)
F) All of the above

Question 19

During the bell stage of tooth development,the odontoblasts form:

Accepted Answer

A)  enamel.
B)  dentin.
C)  cementum.
D)  pulp.E) B) and D)
F) B) and C)

Question 20

Which statement is NOT true of dentin?

Accepted Answer

A)  Dentin makes up the main portion of the tooth structure.
B)  Dentin extends almost the entire length of the tooth.
C)  Dentin is the hardest tissue in the body.
D)  Dentin is capable of growth and repair.E) B) and D)
F) None of the above

Exam 8: Oral Embryology and Histology

The process of tooth formation is:

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The teeth develop in which sequence?

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The attachment apparatus that retains the tooth in its functional position in the jaw includes the:

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During the bell stage of tooth development,the odontoblasts form:

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The _____ within the periodontium.

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Which statement is NOT true of succedaneous teeth?

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The tough,light pink,keratinized tissue that covers the hard palate and includes the attached gingiva is _____ mucosa.

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The embedded portions of the periodontal ligament fibers that connect the cementum of the tooth and the bone are called:

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The primary dentition will begin to form during the _____ month of gestation.

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The face begins to develop during the _____ week of pregnancy.

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The root of the tooth is covered with:

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Which statement is NOT true of dentin?

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What is the difference between secondary dentin and tertiary dentin?

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Which of the following statements is true concerning developmental disturbances during tooth formation?

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Variations in the shades or coloring of enamel are caused by _____ the enamel.

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The tapered end of each root tip is known as the:

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When are the first signs of tooth development found in the anterior mandibular region of the developing embryo?

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Which statement is NOT true about teratogens?

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_____ are enamel-forming cells.

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Each tooth develops from its own tooth bud,which develops during the ____ stage of tooth development.

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