Deck 16: Biofilms

Question 1

Bacterial ghosts are calcified bacteria.

Answer 1

True

Question 2

Which type of organism appears supragingivally?

A) Neutral
B) Anaerobic
C) Gram-positive
D) Gram-negative

Answer 2

Gram-positive

Question 3

Which organisms attach to the pellicle to form a thick layer of plaque?

A) Rods
B) Filamentous organisms
C) Desquamated epithelial cells
D) All of the above

Answer 3

All of the above

Question 4

The ______________ of plaque is essential for the prevention of disease.

A) removal
B) disclosure
C) deposition
D) mineralization

Question 5

Which of the following is the best definition for plaque?

A) A type of gingival inflammation
B) A stonelike concretion formed on the teeth
C) A bacterial biofilm on the surface of the teeth
D) An acellular thin film deposited on the surface of teeth from salivary proteins

Question 6

The primary component of calculus is __________.

A) serum
B) bacteria
C) calcium
D) hydroxyapatite

Question 7

The dark color of supragingival calculus is attributed to which of the following?

A) Calcium
B) Hydroxyapatite
C) Organic skeletons
D) Serum and blood pigments

Question 8

Serumal calculus is usually a darker color.

Question 9

Which of the following is a function of a disclosing solution?

A) Diagnosing pulpits
B) Locating calculus deposits
C) Determining whether plaque is still present
D) Showing cracks or fissures in the enamel surface

Question 10

Calculus most often appears near which of the following?

A) A missing tooth
B) A tight labial frenum
C) The incisal edge of a tooth
D) The opening of a salivary duct

Question 11

It takes almost 10 days for the pellicle to develop into a thick plaque.The composition of the plaque varies,depending on the location of the plaque and the extent of gingival disease.

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 12

Subgingival calculus is ________ than supragingival calculus.

A) softer
B) harder
C) thicker
D) lighter

Question 13

Plaque is more mineralized than calculus.

Question 14

Glycoproteins are found in the saliva.

Question 15

Cuticular protein is the most important function of the primary cuticle.

Question 16

The breakdown of ______________ results in a brown spot on the tooth.

A) organic debris
B) enamel crystals
C) salivary corpuscles
D) filamentous organisms

Question 17

Which of the following forms the primary cuticle?

A) Fibroblasts
B) Ameloblasts
C) Odontoblasts
D) Cementocytes

Question 18

High levels of ______________ in the saliva indicate the presence of gingival inflammation.

A) T cells
B) leukocytes
C) lymphocytes
D) macrophages

Question 19

Which type of organism appears subgingivally?

A) Neutral
B) Aerobic
C) Gram-positive
D) Gram-negative

Question 20

Plaque protects the enamel surface but can also serve as an attachment site for bacteria.

Question 21

Gingival inflammation has an effect on the cervical enamel.

Question 22

Which disclosing solution will not permanently discolor composite restorations?

Question 23

The _________ allows plaque to form on the surface of the tooth.

Question 24

Calculus varies in both composition and hardness.

Question 25

Calculus may form on dental prostheses.

Question 26

In tonsillitis,there is a dramatic increase in salivary leukocytes.

Question 27

Salivary mucin contributes to the formation of plaque biofilm.

Question 28

____________ produce acids that can demineralize the surface of enamel.

Question 29

The composition of the dental plaque depends,in part,on the extent of gingival disease.

Question 30

The central __________ of a molar is an ideal site for the colonization of oral organisms.

Question 31

Within days,a pellicle can grow into a thick plaque,containing motile spirochetes.

Question 32

Dental plaque is characterized as a ________.