Sendoline S5 Apex Locator Manuel De L'utilisateur page 17

Problem
The OVER
indication appears
accompanied by frequent
audio beeps
No audio tones
Problem
1. File position indication
is unstable, erratic
results.
2. Measurements are too
short or too long; poor
accuracy.
Possible Solution
- The file tip has progressed beyond the apical foramen –
move the file back until the OVER indication disappears.
- The volume was adjusted to "mute" - press the volume
key until the desired volume level is reached.
- Device has malfunctioned - contact your supplier.
Possible cause
Is second electrode
(lip clip) making good
contact with mucosa?
Is the file clip dirty?
Is blood or other
fluids overflowing the
access cavity of the
tooth?
Is the canal filled with
blood, or chemical
solutions?
Is the tooth surface
covered with tooth
debris, smear layer or
chemical solutions?
Is the file touching
the gingival tissue?
Is there vital inflamed
pulp tissue left inside
the canal?
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Solution
Make sure the lip clip makes good
contact with the oral mucosa
Clean the file clip with Ethanol 70-
80% vol.
If blood or other fluids are
overflowing the access cavity they
may create a conductive path
outside the canal and cause
incorrect measurements ("OVER"
indication, unstable readings, etc.).
Check the rubber dam isolation,
use OraSeal ® Caulking or Putty to
repair rubber dam leaks. You may
use ViscoStat or Astrigedent
®
control the gingival tissue
bleeding. Clean and dry the pulp
chamber and tooth crown
thoroughly.
The canal length indicator may
suddenly swing when it breaks the
surface of fluids inside the canal,
but it will return to normal as the
file is advanced toward the apex.
Clean entire tooth surface.
This might lead to incorrect
readings or cause the canal length
indicator suddenly to jump all the
way to the "OVER" position.
If a large amount of vital inflamed
pulp tissue is left inside the canal,
particularly in wide canals such as
for
®