Precautions - Dentsply Sirona ProPex II Manual Del Usuario

Precautions

4 PRECAUTIONS
Important notice
The use of apex locators alone without a preoperative and
postoperative radiograph is not a recommended practice, since apex
locators may not be able to work properly in all conditions.
It is mandatory to confirm radiographically the working length
established using the apex locator.
It is important to follow the precautions below and pay close attention
to any condition or situation that may influence the electrical
conductivity during the procedure.
• Inaccurate or incorrect readings are likely to occur in the following
cases, all procedure related:
- partially blocked canal;
- size of the measuring file differing significantly from the canal
diameter. Ideally, the selected file should be the thickest one
capable of reaching the apex;
- presence of liquids and/or tissue debris in the access cavity. Prior
to the use of the device, the access cavity must be dried with a
cotton pellet in order to prevent leaking current;
- contact of the file or the lip clip with metallic dental structures. Be
particularly careful with patients fitted with metal crowns or
bridges;
- contact of the file with another instrument;
- very dry canal, for instance in the presence of restoration. In this
case the canal must be moistened with an irrigation solution, or
with Glyde™ file prep;
- contact between the file and the gums (this may cause a false
reading indicating that the apex has been reached);
- use of an ultrasonic scaler with the counter electrode attached to
the patient (electrical noise from the scaler could interfere with the
apex localization);
- use of the apex locator in conjunction with an electric scalpel;
- use of a damaged lip clip, hook or fork.
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