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Clinical Practice > Caries Mix > Flashcards

Caries Mix Flashcards

1
Q

what type of disclosing agent are used commonly?

A

erythrosin

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2
Q

what is used for chemical plaque removal?

A

antibiotics
antiseptics
enzymes

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3
Q

what drugs can cause a dry mouth?

A

antihypertensives
antidepressants
diuretics
sedatives

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4
Q

what diet advice can be given to reduce caries?

A 
reduced frequency
no sugar snacks between meals
avoid sugary drinks
avoid sticky sugar foods
suggest safe alternatives
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5
Q

what is microbial succession?

A

as strep moves to actinomyces over 1-14 days

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6
Q

what does acidogenic mean?

A

dietary sugars changed to acid by plaque

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7
Q

what does aciduric mean?

A

can thrive at a low pH

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8
Q

what is the outer zone of dentine caries?

A

demineralised, infected, cant remineralised

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9
Q

what is the inner zone?

A

affected zone
demineralised but can remineralise
minimally infected

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10
Q

what are the 3 modes of action of fluoride?

A

increased remineralisation
increased resistance to demin
reduced acid production by plaque

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11
Q

what is fluorosis?

A

enamel hypoplasia
increased fluoride affects anemal matrix and calcification
causes impaired ameloblastic function

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12
Q

treatment of fluorosis?

A

micro abrasion
bleaching
resin restoration
veneers

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13
Q

what is the content of saliva?

A
  1. 5% water

0. 05% electrolyes and proteins

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14
Q

how much saliva is secreted per day and from where?

A

0.5-0.6 litres per day

submandibular, sublingual and parotid gland

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15
Q

at rest where is the most saliva secreted from?

A

submandibular

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16
Q

when stimulated where is the most saliva secreted from?

A

parotid

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17
Q

what is the appearance like of a dry mouth?

A 
dry glossy atrophic mucosa
infections
angular chelitis
hard to speak/swallow/chew
caries
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18
Q

what is a PRR done for?

A

minimal pits/fissure caries
restore caries and seal rest of system
new/recurrent caries are not an issue

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19
Q

why might restorations fail?

A

new disease - secondary/recurrent caries,pulpal inflammation/trauma
technical failure - tooth/restoration failure,appearance

20
Q

how to tell how active root surface caries are?

A

closer to g.margin = more active
softer = more bacteria
deeper = more active
bigger = more active

21
Q

how to detect approximal caries?

A

transillumination, ortho seperators, radiographs, floss/probe

22
Q

what is electronic resistance measurer?

A

sound enamel insulates

caries = porosities = water/ions = passage of electrinc current

23
Q

types of electrinic resistance measurers?

A

vanguard

electronic caries meter

24
Q

what is DIFOTI?

A

uses transillumination to detect approx caries

25
Q

how are dyes used for caries detection?

A

demin at advancing front, stains demineralised tissue

false negatives/non sepcific

26
Q

what is diagnodent?

A

uses laser to fluoresce tooth tissue
caries alters fluorescing
low reading = sound tooth
QLF better

27
Q

what are vertical bitewings used to detect?

A

furcations

severity and pattern of bone loss

28
Q

what is the rapid drop on a stephan curve caused by?

A

rapid drop in pH caused by plaque metabolising sugar

29
Q

what causes a slow rise in the stephan curve?

A

slow rise is caused by acid products diffusing out and action of saliva

30
Q

how long does pH recovery take?

A

15-40 mins

31
Q

what governs the shape of a stephan curve?

A

saliva
dilutes an clears metabolites
buffers

32
Q

how does xylitol work to prevent caries?

A

suppresses Smutans
remineralisation of initial enamel lesion
synergistic with fluoride

33
Q

how might malnutrition affect teeth?

A

delayed tooth eruption
hyperplastic enamel structure
increase caries because reduced saliva

34
Q

when does etched enamel remineralise?

A

24 hours

35
Q

how to do a fissure sealant?

A 
clean fissures
acid etch 15-20 seconds
wash isolate dry
apply sealant
light cure or self cure
36
Q

what does sealing over caries cause?

A

cariostasis

37
Q

caries vaccinations against what?

A

strep mutans

38
Q

translucent zone?

A

1-2% porosity
1st carious change
large pores = periphery lost

39
Q

dark zone?

A

5-10% porosity
large and small pores
demin/remin

40
Q

body of lesion?

A

25-50% porosity

41
Q

surface zone?

A

highly mineralised - high F content

1-2% porosity

42
Q

what are arrested caries?

A

wide well developed dark zones

43
Q

how is cavitation caused?

A

demineralisation and bacterial invasion

44
Q

defence mechanisms against caries?

A
  • reactionary/tertiary dentine
  • sclerotic/translucent dentine
  • if rapid progression, there is no sclerosis and odontoblasts dies = may be some reparative dentine
45
Q

what is the critical pH of fluoroapatite?

A

4.5

Clinical Practice (22 decks)

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