Instructions for use KEY Laser III 1243
4 Operation
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4.9 Modes
4.9 Modes
Three modes are available to the user:
▪ Standard therapy mode
▪ DETECT (detection mode)
▪ FEEDBACK (feedback mode)
Note
Foreign light sources can cause problems with the detection/feedback system by
illuminating the optical applicators. This is identified by a broad spread of MOMENT
values. These outside disturbances must be identified and eliminated.
Tools for finding plaque can generate an elevated fluorescence signal; teeth should
therefore be carefully cleaned beforehand.
Fluorinated toothpastes can change the fluorescence signal. The measurements
should hence be taken before using fluorinated toothpastes.
Seals, amalgam and composite fillings can also change the fluorescence signal.
Detection and feedback modes use the fluorescent radiation emitted by altered tooth
substance on exposure to a specific light wavelength. This radiation is detected and
evaluated.
When the following points are not taken into consideration, the detection and feed‐
back values can be misinterpreted:
▪ Soiling
▪ Composite fillings that are fluorescent
▪ Composite fillings with contaminated edges
▪ calculus/concretions
▪ Instances of higher values have been observed close to the pulp
▪ Food residue in the fissures
▪ Prophylaxis pastes
▪ remineralised caries
▪ discoloured teeth that are naturally highly fluorescent
▪ patients who have been exposed to radiation
4.9.1 Changing the mode
The mode (DETECT or FEEDBACK) whose key appears bright with dark inscription
is activated.
To change to another mode, press the corresponding key.
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