Unit 12

Question 1

Which of the following protects oral biofilm from the host’s immune response and antimicrobial agents?

Answer 1

Slime layer

Question 2

Which best describes the stages of oral biofilm formation?

Answer 2

Acquired pellicle forms/bacteria adhere to the tooth surface/bacteria multiply and colonize

Question 3

The longer oral biofilm remains undisturbed, the greater is its pathologic potential. In periodontal disease there is a shift in oral biofilm bacteria to higher portions of gram-negative and anaerobic bacteria

Answer 3

Both statements are true

Question 4

Calculus is formed due to the presence of which of the following?

Answer 4

Minerals in saliva

Question 5

Which of the following describes sources of stain that originate from outside the tooth?

Answer 5

Exogenous

Question 6

Which of the following best describes materia alba?

Answer 6

An unstructured mass of oral debris and bacteria

Question 7

Which of the following provide the source for the formation of acquired pellicle?

Answer 7

Glycoproteins from saliva

Question 8

Which of the following stains are associated with chromogenic bacteria?

Answer 8

Orange

Question 9

Subgingival biofilm results from the apical proliferation of microorganisms from supragingival biofilm. Subgingival biofilm includes more anaerobic and motile organisms, and are predominantly gram-negative.

Answer 9

Both statements are true

Question 10

Which of the following is the most efficient means of identifying supragingival calculus

Answer 10

Visual observation and compressed air

Question 11

Each of the following species of bacteria is associated with periodontitis EXCEPT one. Which is the EXCEPTION?

Answer 11

Streptococcus mutans

Question 12

Each of the following is a characteristic of black line stain EXCEPT one. Which is the EXCEPTION

Answer 12

Associated with poor oral hygiene

Question 13

Intrinsic stains are best removed by

Answer 13

whitening agents

Question 14

Staining caused by drinking coffee that can be removed by scaling and polishing are best be classified as

Answer 14

exogenous extrinsic stain

Question 15

Tooth discoloration that results from trauma to the pulp and subsequent decomposition of hemoglobin can best be classified as

Answer 15

endogenous intrinsic stain

Question 16

Which of the following is an example of intrinsic stain?

Answer 16

Tetracycline

Question 17

The dark color of subgingival calculus can be attributed to which of the following?

Answer 17

Pigments from blood

Question 18

Which of the following is present in higher levels in light formers of calculus

Answer 18

Pyrophosphate

Question 19

Each of the following is an antimicrobial agent associated with tooth staining EXCEPT one. Which is the EXCEPTION?

Answer 19

Triclosan

Question 20

Which of the following is most commonly associated with yellow stain?

Answer 20

Heavy biofilm accumulation

Question 21

The application of disclosing agents should occur following the clinical assessment of the gingiva. Disclosing agents can mask the signs of inflammation.

Answer 21

Both statements are true

Question 22

Each of the following is an example of intrinsic stain EXCEPT one. Which is the EXCEPTION

Answer 22

Black line

Question 23

What is the reason why supragingival calculus appears most frequently on the lingual surface of mandibular anterior teeth and buccal surface of maxillary molars?

Answer 23

These areas are adjacent to the salivary ducts.

Question 24

Which of the following best describes a Simplified Oral Debris score of 0?

Answer 24

Excellent

Question 25

Documentation of the patient’s deposits should occur at the initial appointment to establish a baseline. The assessment of oral deposits should be a factor in developing an individualized treatment plan.

Answer 25

Both statements are true