BENPPIQDFUWEB / Rev.04 / 08-2018
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Step by Step Instructions
If the device indications change too slowly, please review the following check-list:
6.10.8
Comparison of electronic length determination versus
radiography
Radiography represents a two-dimensional projection of a three-dimensional root canal
system. There are some cases when the radiographic length and the electronic length do
not match. In case of discrepancy, please refer to GCP standards applicable in your
country as well as your clinical expertise.
Issue
Solution
Blocked root canal impeding the conductive
path and preventing normal device functioning.
Check the comparative radiographs for
support information on canal length;
Catheterize with ISO 06 / 08 endodontic file
until the working length is reached.
Retreatment: blockage by old canal filling
material residue, impeding the conductive path
and preventing normal device functioning.
Take a radiograph to re-check and try to
completely remove the old canal filling material
prior to determining length.
Blockage by remnants of a medicated
substance (e.g. calcium hydroxide) impeding
the conductive path and preventing normal
device functioning.
Completely remove the remnants prior to
determining length.
Extremely dry root canal impeding the
conductive path and preventing normal device
functioning.
Rinse root canal with irrigating solution such as
NaCl or NaOCl and dry the access cavity with
a cotton pellet / air- blower.
Special condition symptom: exceptionally large
apical foramen due to lesion or incomplete
formation.
May lead to incorrect feedback from
Propex IQ
®
Apex Locator. Perform
radiography.
Root fracture or perforation.
May lead to incorrect feedback from
Propex IQ
®
Apex Locator. Perform
radiography.
