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Dental Plaque 1

Question 1 of 31

1

The dental cuticle consists of which two layers?

Select one or more of the following:

  • Inner amorphous layer

  • Outer cellular layer

  • Fine granular layer

  • Electron dense layer

Explanation

Question 2 of 31

1

Fill the blank spaces to complete the text.

The outer layer of the dental cuticle resembles the

The inner layer of the dental cuticle resembles the last secretion of the

Explanation

Question 3 of 31

1

Which of these are functions of the acquired pellicle?

Select one or more of the following:

  • Semi-permeable barrier

  • Lubrication

  • Modulation of bacterial adherence

  • Cytotoxic factor production

  • Production of fructans

Explanation

Question 4 of 31

1

Fill the blank spaces to complete the text.

The acquired pellicle forms as calcium from enamel dissolves in . These are charged ions. Salivary are charged and are therefore attracted to the charged calcium ions. This permits formation of the pellicle. This deposition of occurs in around 2-3 after prophylaxis.

Explanation

Question 5 of 31

1

The acquired pellicle is composed of mostly...

Select one or more of the following:

  • Acidic amino acids

  • Neutral amino acids

  • Sugars

  • Lipids

  • Methionine

Explanation

Question 6 of 31

1

The presence of stannous fluoride alters the pellicle amino acid composition resulting in more glycine and serine.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 31

1

Fill the blank spaces to complete the text.

Some examples of oral microenvironments are:

mucosa
surface of the tongue
T surfaces
C epithelium
As

Explanation

Question 8 of 31

1

The acquired pellicle penetrates a small distance into the enamel - the sub surface cuticle.

Select one of the following:

  • True
  • False

Explanation

Question 9 of 31

1

Where is the thickest pellicle found?

Select one of the following:

  • Lower posterior lingual surfaces

  • Lower anterior lingual surfaces

  • Upper anterior palatal surfaces

  • Upper posterior distal surfaces

Explanation

Question 10 of 31

1

Where is the thinnest pellicle found?

Select one of the following:

  • Upper anterior palatal surfaces

  • Upper posterior distal surfaces

  • Lower anterior lingual surfaces

  • Lower posterior lingual surfaces

Explanation

Question 11 of 31

1

Mycobacteria form part of the oral flora

Select one of the following:

  • True
  • False

Explanation

Question 12 of 31

1

Where is calculus most commonly found?

Select one of the following:

  • Lower anterior lingual surfaces

  • Lower posterior lingual surfaces

  • Upper posterior palatal surfaces

Explanation

Question 13 of 31

1

Dental plaque is composed of

Select one or more of the following:

  • Dead bacteria

  • Living bacteria

  • Salivary host compounds

  • Calcified material

  • IgA

Explanation

Question 14 of 31

1

Which bacteria is a bridging bacteria?

Select one of the following:

  • Fusobacterium

  • Streptococci

  • Veillonella

Explanation

Question 15 of 31

1

What are some long range pellicle interactions?

Select one or more of the following:

  • Van Der Waals

  • Stereochemical interactions between receptors on pellicle and adhesins on bacteria

  • Hydrogen bonds

  • Ionic bonds

Explanation

Question 16 of 31

1

What are some short range pellicle interactions?

Select one or more of the following:

  • Van Der Waals

  • Stereochemical interactions between receptors on pellicle and adhesins on bacteria

  • Hydrogen bonds

  • Ionic bonds

Explanation

Question 17 of 31

1

P gingivalis is an example of a...

Select one of the following:

  • Late coloniser

  • Early coloniser

Explanation

Question 18 of 31

1

Where does bacterial colonisation of the pellicle begin?

Select one of the following:

  • Gingival margin

  • Occlusal surface of teeth

  • Crevicular epithelium

Explanation

Question 19 of 31

1

The pioneer group of dental plaque are...

Select one of the following:

  • Streptococci

  • Actinomyces

  • Porphyromonas

Explanation

Question 20 of 31

1

Fill the blank spaces to complete the text.

As the biofilm increases in thickness, the initial colonisers are replaced with shaped bacteria which creates a favourable environment for gram and shaped bacteria.

Explanation

Question 21 of 31

1

Collaboration between bacteria to break down complex substrates is an example of what?

Select one of the following:

  • Synergistic interaction

  • Antagonistic interaction

Explanation

Question 22 of 31

1

Bacteria producing bacteriocin is an example of what interaction?

Select one of the following:

  • Antagonistic

  • Synergistic

Explanation

Question 23 of 31

1

Bacteria occupying niches and prevent colonisation is an example of what interaction?

Select one of the following:

  • Antagonistic

  • Synergistic

Explanation

Question 24 of 31

1

The double time of biofilm thickness decreases as time elapses

Select one of the following:

  • True
  • False

Explanation

Question 25 of 31

1

Fissure plaque is dominated by

Select one of the following:

  • Streptococci

  • Actinomyces

  • Lactobacilli

Explanation

Question 26 of 31

1

Approximal plaque is dominated by

Select one of the following:

  • Actinomyces

  • Streptococci

  • Spirochaetes

Explanation

Question 27 of 31

1

Many organisms are proteolytic in crevice plaque

Select one of the following:

  • True
  • False

Explanation

Question 28 of 31

1

Spirochaetes and anaerobic streptococci are almost exclusively isolated from appliance plaque

Select one of the following:

  • True
  • False

Explanation

Question 29 of 31

1

The fitting surface of appliances tends to harbour

Select one of the following:

  • Streptococci

  • Actinomyces

  • Treponema

Explanation

Question 30 of 31

1

As disease progresses toward periodontitis, what changes are seen?

Select one or more of the following:

  • More anaerobic

  • More gram negative

  • More motile organisms

  • Fewer motile organisms

  • More gram positive

  • More aerobic

Explanation

Question 31 of 31

1

Which bacteria is highly associated with caries?

Select one of the following:

  • Streptococcus mutans

  • Streptococcus salivarius

  • Actinomyces Naeslundii

Explanation

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