2&3 what happens to the structure of the tooth Flashcards Preview

BDS2 CDS caries symposium > 2&3 what happens to the structure of the tooth > Flashcards

Flashcards in 2&3 what happens to the structure of the tooth Deck (18)
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1

what is a plaque biofilm?

an organised bacterial population

2

what 3 things are required for caries?

dental plaque
tooth
diet

3

how does saliva allow bacteria to adhere to enamel

enamel is a smooth surface so bacteria cant adhere w/o a primer
proteins in saliva glue to enamel
-allowing bacterial adhesion
-selective attachment

4

what does bacteria do when attaching?

creates new niches for other bacteria

5

what is a white spot lesion?

what's left over when plaque removed

6

what does a wsl look like?

light, chalky on surface of enamel

7

why can enamel still be mineralized with caries?

when aced demineralizes saliva washes off so demineralization happens on sub-surface

8

what are the characteristics of an enamel lesion?

subsurface loss
enlarged gaps between rods
-mineral loss
rod length preserved

9

what shape do interproximal caries take?

triangle

10

what is a scar of wsl an effect of?

remineralization

11

what kind of surface does an active wsl have?

rough

12

what kind of surface does an inactive wsl have?

smooth

13

how does an inactive lesion look?

plaque can be removed
no cavitation

14

what does a wsl close to gingival margin, gingival bleeding and gingivitis with no plaque suggest?

good oral hygiene done prior to attending but not done regularly

15

why is the pH lower in an active lesion?

uses glucose/sucrose to produce acid much more efficiently than inactive
as bacteria live well in acidic environment it will survive & thrive

16

what is the ecological shift in disease?

S. sanguinis/S. gordonii
-remineralization
MS lactobacilli
-demineralization

17

what is the environmental change in disease?

neutral pH
-remin
low pH
-demin

18

what is the stress change in disease?

excess sugar
-remin
acid production
-demin