Deck 8: Dentin

Question 1

Dentin is _______ than enamel.

A) harder
B) more elastic
C) a whiter shade
D) less radiolucent

Answer 1

more elastic

Question 2

Mantle dentin contains larger collagen fibers than circumpulpal dentin.

Answer 2

True

Question 3

Which type of dentin forms to protect and maintain the vitality of the pulp?

A) Mantle
B) Sclerotic
C) Peritubular
D) Reactionary

Answer 3

Reactionary

Question 4

The appositional growth of dentin is apparent in which feature?

A) Incremental lines
B) Lateral canaliculi
C) Transparent dentin
D) Interglobular spaces

Question 5

Odontoblasts have a singular process when they first differentiate.

Question 6

Odontoblastic processes taper in diameter,being largest near the dentinoenamel junction and smallest near the pulp.

Question 7

_______ are extensions of the odontoblast process into enamel.

A) Dead tracts
B) Neonatal lines
C) Enamel spindles
D) Lines of von Ebner

Question 8

Secondary dentin is the result of insufficient mineralization.

Question 9

The major organic component of dentin is _______.

A) water
B) collagen
C) enamelin
D) hydroxyapatite

Question 10

Which best defines sclerotic dentin?

A) The dentinal matrix that immediately surrounds the dentinal tubule
B) The first dentin formed and deposited at the dentinoenamel junction
C) Dentin directly underlying mantle dentin, comprising the bulk of primary dentin
D) Obliterated tubules, found mainly in areas of attrition, abrasion, fracture, and caries

Question 11

The junction between dentin and enamel is scalloped.

Question 12

Which type of dentin separates mantle dentin from circumpulpal dentin?

A) Granular
B) Globular
C) Transparent
D) Reactionary

Question 13

Interglobular dentin is associated with vitamin B deficiency.

Question 14

Which is the following is a hypermineralized collar of dentin that grows within the tubule?

A) Sclerotic dentin
B) Peritubular dentin
C) Intertubular dentin
D) Interglobular dentin

Question 15

Mineralized tubules are associated with which type of dentin?

A) Mantle
B) Sclerotic
C) Reparative
D) Secondary

Question 16

Peritubular dentin is not found in the dentinal tubules of interglobular dentin.

Question 17

Which type of dentin borders the pulp?

A) Globular
B) Predentin
C) Reactionary
D) Circumpulpal

Question 18

Osteodentin is a form of reparative dentin that resembles cartilage.

Question 19

Odontoblast organelles are usually located within the cytoplasmic process.

Question 20

The granular layer of Tomes is located in the _________.

A) dentin of the root
B) dentin of the crown
C) periodontal ligament
D) cementum of the root

Question 21

An ________ __________ is the defining characteristic of globular dentin.

Question 22

Dentinal tubules contain odontoblast processes,nerve terminals,and dentinal fluid.

Question 23

Odontoblastic injury during a cavity preparation usually results in ________ dentin.

Question 24

Incremental lines are also known as _______ _________.

Question 25

_________ dentin forms when newly recruited odontoblasts begin depositing dentin.

Question 26

Secondary dentin is deposited more quickly than primary dentin.

Question 27

Name three areas in which sclerotic dentin can be found.

Question 28

Primary dentin consists of mantle,globular,and _________ dentin.

Question 29

Dentin is responsive to the environment.

Question 30

Dead tracts develop when odontoblasts die from trauma or old age.