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Fluorescence in Caries
direct relationship between fluroescence and demineralized content.
QLF- quantitative Light-induced fluroescence
use arc lamp 360 nm wavelength(blue)
QLF software parameters
- lesion area
- lesion depth
- lesion volume
QLF performance standards
Good correlation between fluroescence loss and lesion depth.
Better specificity and sensitivity for smooth surfaces.
- Early lesion detection and quantificaiton
- image storing
- lesion monitoring over time
- IR light and 655 nm
- shoots tooth with laser and receives fluroscence
Diagnodent probe tip
two way fiber bundles with transmitter and receiver
Accuracy is increased by
- cleaning/drying teeth
- slightly rotating tip in all three dimensions
Diagnodent peak display records
- "max value"
- 20-30-lower enamel
High mean sensitivity for dentinal caries but wide range
Lower specifity than visual...false positives
LED reflect, refract
How does this work?
Healthy is more translucent than decalcified
Midwest Caries will analyze
reflectance and refraction by enamel LED emission
Emits LED light when up is applied to.....
wet tooth surface
Which fiber captures reflected and refracted light?
Midwest Caries: red light switches on when
demineralized tooth is reached
T/F MidwestCaries: ceramic calibration per patient
Midwest Caries: Interproximal lesion detection probe must be oriented
down tooth long axis
Midwest Caries ID.
sensitivity for interproximal and occusla
- 80% and 92%
- based on radiography and histology
False positives caused by
- atypical enamel morph
- sealants restorations
- stains, debris
- If tooth is dry(Midwest) OR wet(Diagnodent)
- Probe not in contact with tooth surface
Spectra Fluroescent Caries Aid Detection
6 LEDs emitting blue light at 405nm
- combo intraoral camera and caries detection
- Healthy tooth green
- Caries is red or dark
AC impedance spectroscopy (sound enamel has high electrical resistance)
CarieScan Pro: demineralization causes
- enamel permeability increase.
- electrical resistance decrease.
CarieScan Pro: scale
30 means it has reached dentin
What would you like to do?
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