Question 1

In what percentage of cases does cementum meet enamel?

Accepted Answer

A)   0%
B)   10%
C)   30%
D)   60%E) A) and B)
F) A) and C)

Question 2

Intermediate cementum is softer than dentin.

Accepted Answer

A) True 
 B)False

Question 3

At which of the following the cementum is thickest?

Accepted Answer

A)   Apex of the root
B)   Cementoenamel junction
C)   Cervical region of the root
D)   Furcation of multirooted teethE) A) and B)
F) None of the above

Question 4

Which condition occurs most often?

Accepted Answer

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.E) A) and B)
F) A) and C) B

Question 5

A continuing increase of cementum due to aging may obstruct the

Accepted Answer

A)   apical canal.
B)   periodontal ligament space.
C)   occlusion.
D)   pulp horns.E) C) and D)
F) None of the above

Question 6

Why is cementum insensitive to pain?

Accepted Answer

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.E) A) and B)
F) All of the above

Question 7

Cementum is highly vascularized.

Accepted Answer

A) True 
 B)False  False

Question 8

Which is the preferred term for the first layer of cementum that is deposited by the inner layer of the epithelial cells of the root sheath?

Accepted Answer

A)   Cementoid layer
B)   Intermediate cementum
C)   Celluluar cementum
D)   Acellular cementumE) A) and B)
F) A) and C)

Question 9

The intermediate layer of cementum is _____ thick.

Accepted Answer

A)   10 cm
B)   10 mm
C)   10 µm
D)   10 nmE) A) and D)
F) B) and C) C

Question 10

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

Accepted Answer

A)   Extrinsic fiber bundles
B)   Intrinsic fibers of cementum
C)   Calcified ligament fiber bundles
D)   Principal fibers of the periodontal ligament.E) A) and B)
F) None of the above

Question 11

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

Accepted Answer

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.E) All of the above
F) A) and B)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

Cementum forms more rapidly than dentin.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following best defines a cementicle?

Accepted Answer

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 pulpE) A) and C)
F) A) and D)

Question 15

Which percentage of collagen is found in organic cementum?

Accepted Answer

A)   20% to 25%
B)   30% to 35%
C)   40% to 45%
D)   50% to 55%E) None of the above
F) A) and D)

Question 16

Some __________ have long processes that lie in canaliculi.

Accepted Answer

A)   lacunae
B)   cementicles
C)   cementocytes
D)   collagen fibersE) A) and B)
F) A) and C)

Question 17

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

Accepted Answer

A)   more
B)   fewer
C)   larger
D)   smallerE) None of the above
F) A) and D)

Question 18

Incremental lines in cementum indicate _________.

Accepted Answer

A)   trauma
B)   rhythmic deposition
C)   developmental anomalies
D)   the presence of odontocytesE) C) and D)
F) B) and D)

Question 19

The area where cemental resorption stops and deposition begins is called a

Accepted Answer

A)   cementicle.
B)   reversal line.
C)   cementoblast.
D)   cementocyte.E) All of the above
F) A) and B)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 10: Cementum

In what percentage of cases does cementum meet enamel?

Correct AnswerverifiedShow Answer

Intermediate cementum is softer than dentin.

Correct AnswerverifiedShow Answer

At which of the following the cementum is thickest?

Correct AnswerverifiedShow Answer

Which condition occurs most often?

Correct AnswerverifiedB

A continuing increase of cementum due to aging may obstruct the

Correct AnswerverifiedShow Answer

Why is cementum insensitive to pain?

Correct AnswerverifiedShow Answer

Cementum is highly vascularized.

Correct AnswerverifiedFalse

Which is the preferred term for the first layer of cementum that is deposited by the inner layer of the epithelial cells of the root sheath?

Correct AnswerverifiedShow Answer

The intermediate layer of cementum is _____ thick.

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cementum forms more rapidly than dentin.

Correct AnswerverifiedShow Answer

Which of the following best defines a cementicle?

Correct AnswerverifiedShow Answer

Which percentage of collagen is found in organic cementum?

Correct AnswerverifiedShow Answer

Some __________ have long processes that lie in canaliculi.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Incremental lines in cementum indicate _________.

Correct AnswerverifiedShow Answer

The area where cemental resorption stops and deposition begins is called a

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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B

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False

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C

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