KERR ENDODONTICS Apex Connect Mode D'emploi page 7

PRECAUTION
If the file is not properly secured to the file holder, the file may
become detached during use and may result in inaccurate readings.
6. Place the lip hook on the lip opposite the tooth to be
worked on.
7. Slowly insert the file into the root canal, checking the
information on the measurement screen.
• Refer to "Measuring Working Length" on to measure
the length of the root canal.
• When measuring with file holder A, confirm that the file is
connected to the metal part under the file handle.
PRECAUTIONS
• When measuring the root canal length, the file length may vary
depending on the operator's viewing angle.
• After root canal instrumentation, the length of the file may differ
from the measured angle of the original working length. After
instrumenting the root canal, check the working length again.
8. When finished, press, and hold the
2 seconds. The display turns off.
9. Press the [Push]
file from the clip.
10. Refer to "Disassembling the Device" to remove the lip
hook and file holder from the device.
11. Refer to "Cleaning, Disinfection and Sterilization
Instructions" to manage the device.
1
Measuring Working Length
1. Slowly insert the file into the root canal while checking
the readings.
• When the file approaches the APEX reference value, an
alarm beeps.
• When the file reaches or passes the APEX reference
value, the device will sound the alarm continuously and
measurement screen and file holder will flash at the
same time.
• The measured value range and corresponding color will be
shown on the display with the file holder lamp.
See Table Below.
5
[ ] button for
button on the file holder B to remove the
Lamp Color Lamp Status
Blue
Yellow
Red
2. Once the distance between the file and APEX reaches the
APEX reference value, stop inserting the file, place the
rubber stopper of the file on the reference point of the tooth,
and then remove the file from the tooth.
3. Use an Endo ruler to measure the working length between
the end of the file and the rubber stopper.
NOTE:
Use radiographs to check the working length.
Different results from radiographs than the results obtained from
the measuring device may be shown. This is not a malfunction
of the measuring device. It may be due to the anatomical apex
and/or the physiologic apex may be located coronal to the
radiographic apex, or there was a misalignment of the angle of
the X-ray beam and the film. (See Figure 1)
2
Helpful Tips to Avoid Measuring Errors
• Before measuring root canal length, remove any exudates
such as blood from the root canal.
• Before measuring the root canal length, be sure to dry the
pulp chamber around the root canal opening.
• If the root canal is completely dry, the actual length and
measurement may differ. Fill the inside of the root canal
with saline water and measure.
• After inserting the file to approximately half the length of
the root canal, attach the file to the file holder.
• When measuring the root canal length, start working with a
thicker file. If the reading does not reach the APEX point, use
a thinner file to measure the root canal length.
• During root canal length measurement, be mindful of the
errors that may occur if the file touches a metal restoration.
• The presence of necrotic dentition and cementum within
the root canal can affect the measurements. Measure
several times, extending the root canal with a file of the
appropriate thickness.
• If the root canal is not fully formed or is over instrumented,
the measurement of the working length may be shorter
than the actual measurement.
• To obtain a more accurate measurement with minimal error,
measure at least twice.
• If the root canals within the tooth are connected, such as
a multi-root canals or the tooth has a crack, it may affect
the measured value and cause an error. Use a radiograph to
check the structure of the tooth, including cracks
USER ENVIRONMENT SETTINGS
Follow the steps below to set the user environment for the
Apex Connect unit
1. With the device powered on, press, and hold the
for about 2 seconds. Entering the settings mode, the figures
and graphs flash on the display.
[ ]
2. Press the button to select the APEX reference value, and
[ ]
then press the
volume icon blinks.
• The APEX reference value is displayed as a line on the graph
on the measurement screen, and this line can be used as an
estimate of the working length of the root canal.
Measured value range (mm)
On 3.0–1.1
On 1.0–0.1
On 0.0– -0.5
button. The settings are saved, and the
[ ] button