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      The Effect of File Size on the Accuracy of the Raypex 5 Apex Locator: An In Vitro Study

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          Abstract

          Background and aims

          Determining the proper length of the root canals is essential for successful endodontic treatment. The purpose of this in vitro study was to evaluate the effect of file size on the accuracy of the Raypex 5 electronic apex locator for working length determination of uninstrumented canals.

          Materials and methods

          Twenty maxillary central incisors with single straight canals were used. Following access cavity preparation, electronic working length by means of Raypex 5 apex locator and actual working length were determined. Data were analyzed using ANOVA with repeated measurements and LSD test.

          Results

          There was no significant difference between electronic and actual working lengths when a size 15 K-file was used.

          Conclusion

          Under the conditions of the present study, a size 15 K-file is a more suitable size for de-termining working length.

          Related collections

          Most cited references 22

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          Factors affecting the long-term results of endodontic treatment.

          The influence of various factors that may affect the outcome of root canal therapy was evaluated in 356 patients 8 to 10 yr after the treatment. The results of treatment were directly dependent on the preoperative status of the pulp and periapical tissues. The rate of success for cases with vital or nonvital pulps but having no periapical radiolucency exceeded 96%, whereas only 86% of the cases with pulp necrosis and periapical radiolucency showed apical healing. The possibility of instrumenting the root canal to its full length and the level of root filling significantly affected the outcome of treatment. Of all of the periapical lesions present on previously root-filled teeth, only 62% healed after retreatment. The predictability from clinical and radiographic signs of the treatment-outcome in individual cases with preoperative periapical lesions cases was found to be low. Thus, factors which were not measured or identified may be critical to the outcome of endodontic treatment.
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            Microscopic investigation of root apexes.

             Y Kuttler (1955)
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              Twenty years of endodontic success and failure.

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                Author and article information

                Journal
                J Dent Res Dent Clin Dent Prospects
                J Dent Res Dent Clin Dent Prospects
                Journal of Dental Research, Dental Clinics, Dental Prospects
                Journal of Dental Research, Dental Clinics, Dental Prospects
                Tabriz University of Medical Sciences
                2008-210X
                2008-2118
                Winter 2008
                15 May 2008
                : 2
                : 1
                : 24-27
                Affiliations
                1Assistant Professor, Department of Endodontics, Dental School, Guilan University of Medical Science, Iran
                2Dentist, Private Practice
                Author notes
                [* ]Corresponding Author: sadeghi_dds@ 123456yahoo.com
                Article
                10.5681/joddd.2008.005
                3533634
                23285326
                Categories
                Original Article

                Dentistry

                working length, root canal therapy, apex locator

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