Dental Plaque 1

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Quiz by , created about 3 years ago

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Created by 0 9 about 3 years ago
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Question 1

Question
The dental cuticle consists of which two layers?
Answer
  • Inner amorphous layer
  • Outer cellular layer
  • Fine granular layer
  • Electron dense layer

Question 2

Question
The outer [blank_start]cellular[blank_end] layer of the dental cuticle resembles the [blank_start]enamel organ[blank_end] The inner [blank_start]amorphous[blank_end] layer of the dental cuticle resembles the last secretion of the [blank_start]ameloblasts[blank_end]
Answer
  • cellular
  • amorphous
  • enamel organ
  • ameloblasts

Question 3

Question
Which of these are functions of the acquired pellicle?
Answer
  • Semi-permeable barrier
  • Lubrication
  • Modulation of bacterial adherence
  • Cytotoxic factor production
  • Production of fructans

Question 4

Question
The acquired pellicle forms as calcium from enamel dissolves in [blank_start]saliva[blank_end]. These are [blank_start]positively[blank_end] charged ions. Salivary [blank_start]glycoproteins[blank_end] are [blank_start]negatively[blank_end] charged and are therefore attracted to the [blank_start]positively[blank_end] charged calcium ions. This permits formation of the pellicle. This deposition of [blank_start]glycoproteins[blank_end] occurs in around 2-3 [blank_start]minutes[blank_end] after prophylaxis.
Answer
  • glycoproteins
  • glycoproteins
  • negatively
  • positively
  • positively
  • saliva
  • minutes

Question 5

Question
The acquired pellicle is composed of mostly...
Answer
  • Acidic amino acids
  • Neutral amino acids
  • Sugars
  • Lipids
  • Methionine

Question 6

Question
The presence of stannous fluoride alters the pellicle amino acid composition resulting in more glycine and serine.
Answer
  • True
  • False

Question 7

Question
Some examples of oral microenvironments are: [blank_start]Buccal[blank_end] mucosa [blank_start]Dorsal[blank_end] surface of the tongue T[blank_start]ooth[blank_end] surfaces C[blank_start]revicular[blank_end] epithelium A[blank_start]ppliance[blank_end]s
Answer
  • Buccal
  • Dorsal
  • ooth
  • revicular
  • ppliance

Question 8

Question
The acquired pellicle penetrates a small distance into the enamel - the sub surface cuticle.
Answer
  • True
  • False

Question 9

Question
Where is the thickest pellicle found?
Answer
  • Lower posterior lingual surfaces
  • Lower anterior lingual surfaces
  • Upper anterior palatal surfaces
  • Upper posterior distal surfaces

Question 10

Question
Where is the thinnest pellicle found?
Answer
  • Upper anterior palatal surfaces
  • Upper posterior distal surfaces
  • Lower anterior lingual surfaces
  • Lower posterior lingual surfaces

Question 11

Question
Mycobacteria form part of the oral flora
Answer
  • True
  • False

Question 12

Question
Where is calculus most commonly found?
Answer
  • Lower anterior lingual surfaces
  • Lower posterior lingual surfaces
  • Upper posterior palatal surfaces

Question 13

Question
Dental plaque is composed of
Answer
  • Dead bacteria
  • Living bacteria
  • Salivary host compounds
  • Calcified material
  • IgA

Question 14

Question
Which bacteria is a bridging bacteria?
Answer
  • Fusobacterium
  • Streptococci
  • Veillonella

Question 15

Question
What are some long range pellicle interactions?
Answer
  • Van Der Waals
  • Stereochemical interactions between receptors on pellicle and adhesins on bacteria
  • Hydrogen bonds
  • Ionic bonds

Question 16

Question
What are some short range pellicle interactions?
Answer
  • Van Der Waals
  • Stereochemical interactions between receptors on pellicle and adhesins on bacteria
  • Hydrogen bonds
  • Ionic bonds

Question 17

Question
P gingivalis is an example of a...
Answer
  • Late coloniser
  • Early coloniser

Question 18

Question
Where does bacterial colonisation of the pellicle begin?
Answer
  • Gingival margin
  • Occlusal surface of teeth
  • Crevicular epithelium

Question 19

Question
The pioneer group of dental plaque are...
Answer
  • Streptococci
  • Actinomyces
  • Porphyromonas

Question 20

Question
As the biofilm increases in thickness, the initial colonisers are replaced with [blank_start]filament[blank_end] shaped bacteria which creates a favourable environment for gram [blank_start]negative[blank_end] and [blank_start]spiral[blank_end] shaped bacteria.
Answer
  • filament
  • negative
  • spiral

Question 21

Question
Collaboration between bacteria to break down complex substrates is an example of what?
Answer
  • Synergistic interaction
  • Antagonistic interaction

Question 22

Question
Bacteria producing bacteriocin is an example of what interaction?
Answer
  • Antagonistic
  • Synergistic

Question 23

Question
Bacteria occupying niches and prevent colonisation is an example of what interaction?
Answer
  • Antagonistic
  • Synergistic

Question 24

Question
The double time of biofilm thickness decreases as time elapses
Answer
  • True
  • False

Question 25

Question
Fissure plaque is dominated by
Answer
  • Streptococci
  • Actinomyces
  • Lactobacilli

Question 26

Question
Approximal plaque is dominated by
Answer
  • Actinomyces
  • Streptococci
  • Spirochaetes

Question 27

Question
Many organisms are proteolytic in crevice plaque
Answer
  • True
  • False

Question 28

Question
Spirochaetes and anaerobic streptococci are almost exclusively isolated from appliance plaque
Answer
  • True
  • False

Question 29

Question
The fitting surface of appliances tends to harbour
Answer
  • Streptococci
  • Actinomyces
  • Treponema

Question 30

Question
As disease progresses toward periodontitis, what changes are seen?
Answer
  • More anaerobic
  • More gram negative
  • More motile organisms
  • Fewer motile organisms
  • More gram positive
  • More aerobic

Question 31

Question
Which bacteria is highly associated with caries?
Answer
  • Streptococcus mutans
  • Streptococcus salivarius
  • Actinomyces Naeslundii