caries diagnosis Flashcards
how is electronic resistance used to diagnose caries?
sound enamel = good electrical insulator
caries = porosity = water = passage of an electric current = drop in electrical resistance
types of electronic caries resistance equipment?
- electronic caries meter - early diagnosis, dry tooth
- vanguard caries meter
what is DIFOTI?
digital imaging fibre optic transillumination - impoves approx detection, used for fractures
what are caries detecting dyes?
protein dyes marketed as caries detection agents
stains demineralised areas not infected areas
what is the accuracy of dyes like?
not all stained is infected - false positive
absence of stain doesnt mean no bacteria - false negatives
non specific
what is DIAGNOdent?
laser fluoresence
useful for early caries diagnosis
fluoresces when irradiated by laser light of specific wavelength
caries alters fluoresence
what do diagnodent readings mean?
low - sound tooth
only useful for occlusal lesions
what is QLF?
quantative light induced fluoresence
better than diagnodent
what is air abrasion?
al02 rapidly abrades enamel and dentine
= small shallow cavities without LA
