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Broken crown.
If the crown is broken and a section
of the gingival tissue intrudes into the
cavity surrounding the canal opening,
contact between the gingival tissue and
the file will result in electrical leakage
and an accurate measurement cannot be
obtained. In this case, build up the tooth
with a suitable material to insulate the
gingival tissue.
Fractured tooth.
Leakage through a branch canal
Fractured tooth will cause electrical
leakage and an accurate measurement
cannot be obtained.
A branch canal will also cause electrical
leakage.
Re-treatment of a root filled with gutta-
percha.
The gutta-percha must be completely
removed to eliminate its insulating
effect. After removing the gutta-percha,
pass a small file all the way through
the apical foramen and then put a little
saline in the canal, but do not let it
overflow the canal opening.
Crown or metal prosthesis touching
gingival tissue.
Accurate measurement cannot be
obtained if the file touches a metal
prosthesis that is touching gingival
tissue. In this case, widen the opening at
the top of the crown so that the file will
not touch the metal prosthesis before
taking a measurement.
Extremely dry canal.
If the canal is extremely dry, the meter
may not move until it is quite close to
the apex. In this case, try moistening the
canal with saline.
Difference in measuring result between apex locator reading and
radiography.
Sometimes the reading of apex locator and the X-ray image will not
correspond. This does not mean that the apex locator is not working
properly or that the X-ray exposure is a failure. An X-ray image might not
show the apex correctly depending on the angle of the X-ray beam, and
the location of the apex might seem to be other than it really is.
The actual apex for the canal is not the
same as that for the anatomical apex.
There are frequently cases where the
apical foramen is located up towards the
crown. In these cases, an X-ray might
indicate that the file has not reached the
apex even though it has actually reached
the apical foramen.
4.9 Battery Charging
The motor handpiece has built-in rechargeable lithium battery.
When charging the battery, leave approximately 10cm around the
charging base for easy access to inlet and the power cord.
Insert the power adapter plug into the charging base power socket
and confirm that they are correctly connected. Then insert the motor
handpiece into the charging base (the motor handpiece needs to be
correctly aligned with the charging base in the same direction for
charging). When the blue indicator on the charging base flashes, it is
charging. When the motor handpiece is fully charged, the blue indicator
on the charging base is always on.
After charging, please unplug the power adapter.
4.10 Replacing Battery
Replace the battery if it seems to be running out of power sooner than
it should. Please use the original lithium battery.
Содержание BA OPTIMA E+ BAE380R
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