Light Intensity - Ivoclar Vivadent Bluephase G4 Mode D'emploi

Polyvision - Automatic assistant with intelligent
anti-glare protection
Bluephase G4 features a fully
automated "polyvision" assistant for
safe polymerization. This feature
enables the curing light to
automatically sense if the handpiece is inadvertently
moved from its position during the curing procedure. To
prevent any associated reduction in the amount of
energy being transferred, the device will start to vibrate
to alert the user to the improper use and, if necessary,
will automatically extend the curing time by 20%. If the
handpiece is significantly shifted away from its initial
position (e.g. out of the oral cavity), the light will
automatically switch off so that the curing process can
be restarted and carried out correctly.
In addition, polyvision also acts as intelligent anti-glare
protection. Polyvision ensures that the curing light
cannot be called on in open space. The light can only be
activated once the light guide is positioned directly over
the material to be polymerized. This protects the
operator and patient from being blinded by the light.
If a protective sleeve is used, this function is not
applicable.
If you do not want to use the assistant, you can
deactivate it at any time by long pressing (> 2 seconds)
the time or program selection button. The symbol on
the handpiece (see 1.3 Indicators on the handpiece)
disappears.
Measuring the light intensity (optional, only in
charging base with radiometer)
We recommend checking the light intensity emitted by
the curing light at regular intervals using the integrated
radiometer in order to be sure that the materials are
adequately cured an the composite fillings are of a high
and lasting quality (see 3. Start-Up).
Cure Memory function
The last settings used, together with the combination of
curing program and curing time, are automatically
saved.
Start/Stop
The light is switched on by means of the start/stop
button. It is recommended that the emission window of
the light guide is placed directly on the material to be
polymerized. Once the selected curing time has elapsed,
the curing program is automatically terminated. If
desired, the light can be switched off before the set
curing time has elapsed by pressing the start/stop
button again.
Acoustic signals
Acoustic signals can be heard for the following
functions:
– Start (Stop)
– Every 10 seconds
– Curing time and program change
– Inserting battery
– Error message (if anti-glare protection is activated and
the curing process is aborted)

Light intensity

The light intensity is maintained at a consistent level
during operation. If the supplied 10 mm light guide is
used, the light intensity has been calibrated to
1,200 mW/cm 2 ± 10% in the High Power program. If
another light guide than the one supplied is used, it
directly influences the emitted light intensity.
In a light guide with parallel walls (10 mm), the
diameter of the light entry and the light emission
window is the same. When using focussing light guides
(e.g. Pin-Point light guide 6>2 mm), the diameter of the
light entry is larger than that of the light emission
window. The incident blue light is thus bundled to a
smaller area. In this way, the emitted light intensity is
increased. Pin-Point light guides are suitable for spot-on
poly merization, e.g. to fix veneers before the removal of
excess. For complete polymerization, the light guide
must be changed.
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