Diagnosis Basics
Which specific bacterium is identified in the source as being responsible for the primary infection in the manifestation of dental caries?
S. Mutans
Can radiographs distinguish between active and arrested caries?
Nope
In the context of fluorescence-based caries detection, how does the emitted light wavelength typically compare to the absorbed light wavelength?
The emitted wavelength is larger and less energetic than the absorbed one
What type of caries indicator is known to have carcinogenic potential?
Basic Fushian
Which type of caries is DIAGNOdent INCAPABLE of detecting?
Interproximal or subgingival caries
A root surface lesion appears yellowish or light brown and has a soft consistency when probed. How should this lesion be classified?
Active root surface lesion
What level of demineralization is required before a carious lesion becomes detectable on a radiograph?
40%
How do areas of demineralized enamel appear when viewed through Digital Imaging Fiber-Optic Trans-Illumination (DIFOTI)?
Darker than the surrounding structure
The principle of Electrical Conductance (ECD) in caries detection is based on which physiological change in a demineralized tooth?
Demineralized is more porus thus more conductive
What is the primary reason why a carious lesion viewed by QLF appears darker than sound tissue?
Increased scattering in lesion preventing light to penetrate
How do early non cavitated carious lesion appear when tooth is dried?
matte and white chalky
Why is the radiographic depth of a lesion often deceptive?
The depth is often more shallow irl than on the xray
According to the manufacturer's scale for the standard DIAGNOdent device, what clinical condition is indicated by a reading of 32?
Dentin caries
The Vanguard electronic caries detector utilized a specific current frequency to measure conductance. What was this frequency?
25 HZ
What is the wavelength for the DIAGNOdent laser autofluorescence system?
655nm
What is the difference between early and advanced recurrent carious area?
Early has a discolored margin or small ditches with advanced has a larger defect at the margins
How do moderate proximal lesions appear in a radiograph?
Dont extend into DEJ and broad base towards the outer surface
The original QLF system mechanism of action involves filtering light from a special arc lamp. What type of lamp and excitation filter are traditionally used?
Xenon arc lamp with a blue-transmitting filter
Which requirement must be met for the 'Caries Meter' to function correctly, distinguishing its protocol from the Vanguard system?
The pits and fissues must be moistened with saline
In the Caries Meter system, what do the four colored lights typically represent in terms of disease progression?
No caries, enamel caries, dentin caries, pulpal involvement
In the context of digital radiographic methods, which method generate a 'pseudo-hologram'?
What is the difference between the fundamental mechanism of DIAGNOdent with that of QLF regarding fluorescence intensity in carious tissue?
DIAGNOdent uses infrared laser fluorescence where lesions show higher intensity, while QLF identifies lesions by a decrease in green fluorescence compared to sound tissue.
What is the ultrasound technique used for assessing demineralization?
Pulse-echo
In the mechanism of QLF, what component is positioned in front of the color CCD sensor to facilitate the recording of the fluorescent image?
A yellow-transmitting filter