Journal of Conservative Dentistry
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Year : 2017  |  Volume : 20  |  Issue : 1  |  Page : 21-24

A comparative evaluation of the effect of 8% and 17% ethylenediaminetetraacetic acid exposure for 1min and 10min on the fracture resistance of endodontically treated roots: An invitro study

Department of Conservative Dentistry and Endodontics, Amrith Educational and Cultural Society, Maaruti College of Dental Sciences and Research Centre, Bengaluru, Karnataka, India

Correspondence Address:
Sapna Kakamari
T-4, Shivaganga Bliss, 1st Cross, 1st Main, Harsha Layout, Off Kanakapura Main Road, Bengaluru - 560 062, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-0707.209073

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Objective: The objective of this study was to evaluate the effect of 8% and 17% ethylenediaminetetraacetic acid(EDTA) exposure for 1min and 10min on the fracture resistance of endodontically treated roots. Methodology: Sixty human single-rooted teeth were decoronated and divided into six groups(n=10). Canal preparation was carried out except in negative control group, using the ProTaper rotary file system. Final irrigation was performed using distilled water, 17% EDTA for 1min and 10min, 8% EDTA for 1min and 10min. Thereafter, roots were obturated with ProTaper F3 Gutta-percha points and AH Plus sealer using a single-cone technique. The specimens were loaded vertically at 1mm/min crosshead speed until vertical root fracture occurred. Results were evaluated statistically with one-way analysis of variance and post hoc Tukey test. Results: Analysis of results showed that the unprepared roots showed the highest fracture resistance and roots irrigated with 17% EDTA for 10min showed the lowest fracture resistance. The mean fracture resistance of unprepared roots, roots irrigated with 8% EDTA for 10min and 17% EDTA for 1min was significantly higher than roots irrigated with 8% EDTA for 1min, 17% EDTA for 10min and distilled water. Conclusion: From a clinical viewpoint, if EDTA has to be used, it is safer to use higher concentration for a shorter application time or a low concentration with a longer application time. Prolonged use of high concentrations of EDTA might increase the risk of root fracture.

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