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7.5 Tips for Successful Length Too lazy or extremely delayed movement is Comparison of electronic length determination To select the settings features, use the scrolling
Determination indicated for the following reasons: versus radiography: bar (Fig. 19). (see 6 features in chapter 7.6.1)
X-ray radiography represents two-dimensional
en Please review the below checklist to better Symptom Solution projection of three-dimensional root canal system. en
understand any implausible measuring results and There are some cases when the radiographic
to take appropriate actions: Obliterated root • Check the comparative length and the electronic length do not match.
canal Impeding the x-ray for hints.
Too fast movement or even jumping to the apex is conductive path and • Catheterize with
indicated for the following reasons:
preventing normal device ISO 06/ 08 file till the
functioning. working length.
Symptom Solution
Excess liquid in the pulp Dry the access cavity Retreatment: Blockage • Take an x-ray to
chamber or root canal with a cotton pellet/ by old canal filling re-check and try to
(rinsing solution, blood or air-blower. material residue, completely remove the
saliva), creating wrong Wait until excess impeding the conductive old canal filling material
conductive path and bleeding can be stopped. path and preventing prior to measuring
incorrect measurements normal device Fig. 19 Scroll between settings
functioning
Gingival proliferation Isolate the access cavity
can lead to direct contact by: Blockage by remnants Completely remove In the case of a lateral canal curvature the x-ray To exit the Settings Menu, tap the back arrow icon
with the measuring • adequate preparation of a medicated the remnants prior to may show a shorter working length than with or the RAYPEX 6 “home” icon (Fig. 20)
®
®
file causing a short filling substance (e.g. calcium measuring. RAYPEX 6.
circuit and incorrect • placing a rubber dam hydroxide) impeding
measurements • electrocauterizing the conductive path and Electronic length determined using RAYPEX 6
®
preventing normal device is usually more accurate than the radiographic
The measuring file Carefully enlarge the functioning
contacting metallic access cavity and isolate length.
restorations (crown, with flow composite. Extremely dry root Rinse root canal with
parapulpal post, Widen carefully the canal impeding the irrigating solution such
amalgam filling) may opening at the top of the conductive path and as NaCl or NaOCl 7.6 Device Setup
cause a short circuit and crown preventing normal device and dry the access cavity
incorrect measurements functioning with a cotton pellet/ To enter the Settings Menu, tap the settings icon
air-blower. (Fig. 18).

WARNING
In some cases precise determination of
file position cannot be obtained.

Special condition May lead to shorter Fig. 20 Exit settings menu
symptom: Exceptionally measurement than the
large apical foramen actual length.
due to lesion or
incomplete formation
Fig. 18 Tap the settings icon
Root fracture or May lead to incorrect
perforation measurements.

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