What Happens to the Structure of the Tooth Flashcards

1
Q

What are the components of caries?

A

Dental plaque (biofilm)
Diet
Tooth
Time

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2
Q

What affects sugar attack most?

A

frequency of sugar intake rather than quantity

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3
Q

Why is sucrose more cariogenic than glucose?

A

sucrose is used by bacteria to form plaque while glucose is not directly utilised

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4
Q

What do streptococic/bacteria require for tooth adherence?

A

teeth coated in protein (mucin)
Saliva acts as primer

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5
Q

What do early bacteria species do?

A

prepare the space for the next coloniser

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6
Q

What is the two step process in enamel lesions?

A

Surface goes into remineralisation creating white spots

Deep caries still present in sub-surface region. This is why we don’t probe surface white spots

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7
Q

If lesion has not reached dentine?

A

it can be controlled (remineralised/ arrested)

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7
Q

What are characteristics of enamel lesions?

A
  • Subsurface loss
  • Enlarged gaps between rods due to interrod demineralisation
  • Rod length preserved
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7
Q

What do the enlarged gaps between rods cause?

A

compromised gap for caries

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8
Q

What is the critical pH?

A

5.5

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9
Q

What does brushing teeth do?

A

does not remove biofilm but instead disrupts it

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10
Q

What is the critical element?

A

acid is maintained by biofilm .

the presence of fermentable carbohydrates, especially sucrose (table sugar) and other dietary sugars, is considered the critical element that drives the caries process.

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11
Q

What does mature plaque contain?

A

mature plaque (build up) contains microorganisms that like acid

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12
Q

What does immature plaque contain

A

contains all other microorganisms

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13
Q

What is the balance between?

A

remineralisation
demineralisation

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14
Q

What is more in children?

A

more carbon in immature enamel therefore the tissue is more soluble

15
Q

What can be used on childrens immature enamel?

A

fissure sealant to minimise the loss

16
Q

When removing tissue where should you avoid going further?

A

crystals in tubule lumen in dentine

17
Q

What does not bond to dentine well?

A

composite

18
Q

Where does remineralisation occur?

A

occurs at surface

19
Q

Should you operate on an inactive or no defect lesion?

A

no

20
Q

What treatment should be used for an active lesion with no cavity?

A

non-operative treatment

21
Q

What is NAC and where is it measured?

A

below D
no active care
above normal caries control measures

22
Q

What is PCA and where is it measured?

A

between D- D3
stable non cavitated limited to enamel and somewhat dentine

23
Q

What is PCAOCA?

A

between D3-D4
preventive and operative care advised
progressive/cavitated

24
Q

What may changes in radiograph angle show?

A

hidden caries

25
Q

What must radiographs always be used with?

A

clinical examination