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of the apical constriction. (Generally we suggest to use 0.5 for
measurement the length of root canal).
Note: Please do not make the measurement when in charge.
6.
Deciding the working length of root canal
Measure the distance from the bottom of rubber positioning ring to
the tip of the file until the figure indicated 0.5. So the length of root
canal need to minus 0.5~1.0mm is the most suitable working length of
root canal.
The working length of root canal varies from different shapes of
teeth and root canal.
7.
After operation, please pull out the probe wire and switch off the
instrument. If the dentists forgot to switch off the instrument, the
instrument will automatically shut down.
SECTION 6: SAFETY PRECAUTIONS
CAUTIONS:
a. Before operation, you have to read user manual carefully.
b. Like all of the other electric facilities, this machine has an
electromagnetism disturbance. When there is a patient who is now
using the cardiac pacemaker, or there is an electronic operation,
please don't put the machine around. The cardiac pacemaker
sufferer, viz. the serious cardiac pulse abnormality sufferer, is forbidden
to use this machine.
c. Please put in the battery before use. Make sure that the power
of the battery is in sufficient supply to guarantee the correct
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measurement result.
When change the battery, do not mix the old battery with the new
one and mix the alkali battery with the manganic one.
Please take off the battery in the event of longtime nonuse or long
–distance transit.
d. Please use the file with the resin handle rather than metal one.
Even when using the file with the resin handle, please notice that the
fingers should be avoided touching the mental part of the file.
e. Please clip the upper portion of the file rather than the down
portion with the holder, other wise, the metal part of the holder and
the resin part of the file would be damaged. The damaged holder will
affect the measure result.
f. When the file accidentally touches the inner part of the
root-canal, the reading of scale will get a bit abnormality, then will get
right automatically a few seconds later.
g. The device is not suitable for use in the presence of flammable
anesthetic mixtures with air or with oxygen or nitrous oxide.
h. The enclosure of the main body of device is not designed to give
any protection against ingress of water. Please keep the device away
from any harmful ingress of water.
For ACCURATE MARESUREMENT:
●
Make sure that stainless hook entirely contact patient’s mouth
mucosa
●
Check all connections
●
Make sure that when the device is switched on, the device can