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CZECH MEDICAL ASSOCIATION J. Ev. PURKYNĚ |
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Česky / Czech version | Prakt. zub. Lék., roč. 53, 2005, č. 4, s. 68–72. |
The Accuracy of Electronic Working Length Determination
by Apex Locator Ray-Pex 4 Závodský P., Bednář P., Černý D., Ságlová S. Stomatologická klinika LF UK a FN, oddělení záchovné stomatologie a endodoncie, Hradec Králové, přednostka doc. MUDr. V. Hubková, CSc. |
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Summary: Precise working length determination is one of the prerequisites for successful endodontic treatment.
At present there is an improved way of verifying working length. The fourth generation of electronic apexlocators
has already been developed to specify this so important action of endodontic treatment. In our study we
tried to verify accuracy of working length determination with the Ray-Pex 4, the fourth generation group device.
Evaluation of the quality of the electronic measurement approach was based on the distance from file tip to anatomical
apical foramen. Measurement was accomplished on a digital image of sectioned apical region with instrument
inserted in root canal. One milimeter distance maximum from file tip to anatomical apical foramen was considered
as a correct measurement. Results were satisfactory in 95 % (37 of 39 root canals). Statistical comparison
of single- and multi-canal root group didn’t show any difference. On the basis of results of this study and our experiences
acquired during time of this experiment we finally recommend a rational way of using apex locator Ray-
Pex 4.
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