Deck 13: Biofilm,calculus,and Stain

Question 1

"Healthy" biofilm contains

A) Motile,gram positive bacteria
B) Non-motile,gram positive bacteria
C) Motile,gram negative bacteria
D) Nonmotile,gram negative bacteria

Answer 1

Non-motile,gram positive bacteria

Question 2

Which of the following explorers is suggested for use in a normal sulci or shallow pocket as well as deep periodontal pockets?

A) Curved
B) Pigtail
C) 11/12
D) Cow horn

Answer 2

11/12

Question 3

Supragingival biofilm accumulates on the clinical crown and subgingival biofilm is located within the periodontal pocket or sulcus.Disclosing solution can be used to detect supragingival and subgingival biofilm.

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.

Answer 3

The first statement is true; the second is false.

Question 4

Gingivitis is directly associated with

A) How long the biofilm has been on the teeth
B) How much biofilm is on the teeth
C) How many times the individual brushes his or her teeth in a day's time
D) All of the above
E) Both A and B

Question 5

A thin film that coats the tooth immediately upon exposure to saliva is called

A) Biofilm
B) Materia alba
C) Acquired pellicle
D) Food debris

Question 6

Biofilm is an accumulation of microbial cells within an inorganic matrix.Contained within the matrix are polysaccharides,proteins,and DNA.

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 7

A loosely attached accumulation of bacteria that can be easily removed by mechanical actions is

A) Biofilm
B) Acquired pellicle
C) Materia alba
D) Calculus

Question 8

Which of the following can be seen radiographically?

A) Biofilm
B) Acquired pellicle
C) Materia alba
D) Calculus

Question 9

The most common form of gingivitis found in the general population is

A) Gingivitis associated with biofilm
B) Gingivitis associated with systemic disease
C) Gingivitis associated with Dilantin use
D) None of the above

Question 10

Green stain is primarily found on children's

A) Maxillary anterior teeth at the cervical line
B) Mandibular anterior teeth at the cervical line
C) Maxillary posterior teeth at the cervical line
D) Mandibular posterior teeth at the cervical line

Question 11

A soft,sticky deposit that adheres to the teeth as a natural occurrence in the oral cavity is

A) Biofilm
B) Materia alba
C) Acquired pellicle
D) Food debris

Question 12

Which of the following is NOT an example of intrinsic endogenous staining?

A) Tobacco use
B) Fluorosis
C) Tetracycline stain
D) Endodontic therapy stain

Question 13

Which of the following bacteria is NOT associated with the acquired pellicle and biofilm formation?

A) Streptococcus mutans
B) Streptococcus sanguinis
C) Streptococcus viridans
D) Actinomyces viscosis

Question 14

Most Streptococcus and Actinomyces species metabolize sugars,such as glucose,to lactic acid.Lactic acid is then broken down further into hydrogen,methane,and carbon dioxide by other members of the biofilm.

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

Question 15

Calculus mineralization takes

A) Less than 24 hours with complete maturation within 3 days on average
B) 24 to 36 hours with complete maturation within 6 days on average
C) 24 to 72 hours with complete maturation within 10 days on average
D) 24 to 72 hours with complete maturation within 12 days on average

Question 16

The manner in which calculus does NOT present itself is

A) Spicules
B) Rings
C) Ledges
D) Triangles

Question 17

Which of the following is NOT considered a soft deposit of the oral cavity?

A) Calculus
B) Acquired pellicle
C) Materia alba
D) Biofilm

Question 18

Clinical research shows a direct link between one chronic inflammatory condition,such as periodontal disease,to others,such as heart disease,premature birth weight,and diabetes.If a patient has periodontal disease he or she should be referred to a cardiologist.

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

Question 19

Poor or neglected oral hygiene and diet are the two most common risk factors for caries formation.The regular removal of dental plaque biofilm,which contains the bacteria responsible for caries formation,gingivitis,and periodontitis,is the basis for maintaining oral health.

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.