6 diagnosis & classification Flashcards
what are the 5 methods of classifying caries?
extent cavitation activity site location
what extent is D1?
all visually detectable lesions
what extent is D3?
lesions extending into dentine
how is caries classified by cavitation?
cavitated
not cavitated
how to determine a cavity in an exam?
run a ball-ended probe over area w/ potential cavitation
if catch felt-cavitated
how is caries classified by activity?
active
-demineralising
inactive
-remineralising
how does an inactive lesion look?
shiny
clean
no plaque
how is caries classified by site?
smooth surface -buccal, labial, lingual occlusal -w/i fissures root surface -purely dentine approximal -smooth surface unreachable i.e interproximal
how is caries classified by location?
primary
secondary
-adjacent to a restoration
how are caries scored?
DMFS -surfaces -each surface considered separately DMFT -worst surface dictates tooth code
what dictates reliability?
accuracy and precision
what is accuracy?
measures what is claimed
what is precision?
consistency of measurement
what are the branches of accuracy?
sensitivity
specificity
what is sensitivity?
% of disease found correctly
what is specificity?
% of health found correctly
what is the relationship between sensitivity and specificity?
as sensitivity increases specificity decreases
what are the basics needed for a good exam?
good light
dry the tooth
take your time
don’t use a sharp probe
what fraction of caries are detected by a clinicial?
1/3
what fraction of caries are correctly detected?
- 97
- meaning unnecessary trauma avoided
how can accuracy be improved?
ICCMS -international caries classification management system radiographs magnification FOTI -fibre optic trans illumination
what are the advantages of radiographs?
in all practices
accurate
quick
go on permanent record
what are the disadvantages of radiographs?
ionising radiation
hard to standardise
type depends on caries
bitewings>periapicals>OPT
what is the advantage of magnification?
simple- loupes
what are the disadvantages of magnification?
time to get used to
cost
what other techniques are available to increase accuracy?
fibre-optic transillumination
diagnodent
-laser based red light
electrical techniques
