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Operation 12. 21. ’04
Metal Part
File Release Button
WARNING
•
Electric noise could cause malfunction of the unit. Do not depend entirely on the unit
controlling itself; always watch the display, listen to the sound and be aware of tactile
feedback.
•
Accurate measurement is not always possible depending on the root canal condition. Make
sure to take an x-ray to check the results. Also Nickel-Titanium files can sometimes wear
out rather quickly depending on the shape and the degree of curvature of the root canal. Stop
using the unit immediately if it does not seem to be working properly.
•
When shaping and cleaning a root canal, make sure that the file or contrary electrode does
not come in contact with an electrical power source such as an electrical socket. This could
result in a severe electrical shock.
•
Nickel-Titanium files are more easily broken than stainless steel files by the amount of
torque applied to them. Do not try to force the file down the root canal. Also do not use these
files for the root canals that have a relatively sharp curve near the apical foramen.
•
Nickel-Titanium files will eventually break due to metal fatigue and should be replaced
before they reach this point.
•
Always examine files for separation and other deformities or damage before using them.
Any type of deformity could result in the file breaking.
•
If the file touches the oral mucosa or a tooth, it will automatically start to rotate and could
injure the patient.
•
Do not touch the oral mucosa with the metal part at the
end of the contra angle. This could result in injuring
the patient.
•
If the contra angle’s file release button is pressed
against the teeth opposite the one being treated, the file
could come out and injure the patient.
•
Never press the file release button while the
micromotor is running. This could cause the button to
heat up and burn the patient or the file to come out and
injure the patient.
NOTE
•
Root canal preparation cannot be performed entirely with this unit; use this unit
in
conjunction with standard manual techniques for root canal preparation. Stop using the
unit immediately if tactile sensation indicates an unusual or abnormal condition inside the
root canal.
•
Files break more easily at high speeds; always check the rotation speed setting before using
the unit.
•
Do not use stainless steel files. Use only Nickel-Titanium files. The file electrode cannot be
attached to the following types of Nickel-Titanium files:
•
Files with a diameter greater than 1.2 mm
•
Files which do not have circular handles
•
Gates-Glidden Drills
•
Cutting tools with large bits such as a Largo burr
Use the above types of tools by putting the unit in manual mode without attaching the file
electrode.
•
Make sure to remove the file from the micromotor after completing root canal preparation.
•
Electrical noise will cause the motor to stop and automatically put the unit into the root canal
measurement mode, which is the safest mode. However, it will return to normal operation
when the file is taken out of the root canal.
* The file electrode must be clipped onto the file for accurate measurement and instrument control.
(In some cases, a root canal cannot be measured because of an overflow of blood, saliva or
chemicals or because the root canal is blocked.)
* For difficulty to reach areas, such as maxillary molars, it may be easier to insert the file into the
root canal before activating the micromotor power; remove the contrary electrode from the
patient’s mouth and then insert the file. Then hook the contrary electrode back in the corner of
the patient’s mouth to start the file rotating.