Deck 10: Cementum

Question 1

Intermediate cementum lies between the ___________ and the secondary cementum.

A) enamel
B) periodontal tissue
C) granular layer of Tomes
D) cellular-acellular cementum

Answer 1

granular layer of Tomes

Question 2

Which of the following best defines the term ankylosis?

A) Alveolar bone fuses with cementum.
B) The cementum fuses with underlying dentin.
C) Alveolar bone fuses with the PDL ligament.
D) The cementum of two adjacent teeth fuses together.

Answer 2

Alveolar bone fuses with cementum.

Question 3

Which condition occurs most often?

A) Cementum meets the enamel.
B) Cementum forms on the enamel.
C) Enamel forms over the cementum.
D) A gap occurs between the cementum and enamel.

Answer 3

Cementum forms on the enamel.

Question 4

Cementum is highly vascularized.

Question 5

Cementum is thickest at which of the following?

A) Apex of the root
B) Cementoenamel junction
C) Cervical region of the root
D) Furcation of multirooted teeth

Question 6

Incremental lines in cementum indicate _________.

A) trauma
B) rhythmic deposition
C) developmental anomalies
D) the presence of odontocytes

Question 7

Young children frequently develop free cementicles.

Question 8

Why does aging cementum appear to have a rough surface?

A) Extrinsic wear and occlusal force
B) Calcification of ligament fiber bundles
C) Obstruction of the pattern of incremental lines
D) Cementoblasts cannot repair cementum after resorption.

Question 9

Inner root sheath cells form the cellular-acellular cementum.

Question 10

Intermediate cementum is softer than dentin.

Question 11

Which of the following best defines a cementicle?

A) An ovoid calcification in the periodontal ligament (PDL)
B) A spindle-shaped cell found in the connective tissue
C) A flattened and elongated cell found in the coronal portions of the pulp
D) An irregularly shaped calcified mass appearing in the canal of the pulp

Question 12

Intermediate cementum overlies dentin.

Question 13

Which of the following is formed by cementoblasts and maintained by cementocytes?

A) Extrinsic fiber bundles
B) Intrinsic fibers of cementum
C) Calcified ligament fiber bundles
D) Principal fibers of the periodontal ligament.

Question 14

Which percentage of collagen is found in organic cementum?

A) 20% to 25%
B) 30% to 35%
C) 40% to 45%
D) 50% to 55%

Question 15

Cementocytes found deep in the cementum have _________ organelles than those found near the surface of the cementum.

A) more
B) fewer
C) larger
D) smaller

Question 16

Why is cementum insensitive to pain?

A) Cementum is more permeable than dentin.
B) Dentin forms more quickly than cementum.
C) Cells deep within the cementum are less active.
D) Cementum has no nerve or blood vessel innervation.

Question 17

Cementum resorption is rare,even in older patients.In fact,cementum is more resistant to resorption than bone.

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

Question 18

Intermediate cementum forms completely,before the deposition of secondary cementum begins.

Question 19

The intermediate layer of cementum is _____ thick.

A) 10 cm
B) 10 mm
C) 10 µm
D) 10 nm

Question 20

Some __________ have long processes that lie in canaliculi.

A) lacunae
B) cementicles
C) cementocytes
D) collagen fibers

Question 21

Cementum forms more rapidly than dentin.

Question 22

The initial layer of cementum is known as ____________.

Question 23

List two characteristic differences between cementum and bone.

Question 24

A ________ ________ is created by the deposition of cementum following resorption.

Question 25

The majority of cementocytes reside within the apical cementum.

Question 26

Cementum is a lustrous pale yellow.

Question 27

Aging cementum may obstruct the ______ _______.

Question 28

In terms of cementum formation,what does OMG stand for?

Question 29

Cementum resorption is a characteristic of aging cementum.

Question 30

In what percentage of cases does cementum meet enamel?

Question 31

The initial layer of cementum contains an enamelin-like protein.

Question 32

Following resorption,cemental repair is a function of the ____________.

Question 33

Cementum is devoid of elastic fibers.