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Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system

BACKGROUND: The purpose of this study was to investigate the consistency of working length control between hand instrumentation in comparison to engine driven Mtwo nickel-titanium rotary files. MATERIAL AND METHODS: Forty extracted maxillary molars were selected and divided onto two parallel groups....

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Autores principales: Krajczár, Károly, Varga, Enikő, Marada, Gyula, Jeges, Sára, Tóth, Vilmos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medicina Oral S.L. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4808307/
https://www.ncbi.nlm.nih.gov/pubmed/27034752
http://dx.doi.org/10.4317/jced.52561
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author Krajczár, Károly
Varga, Enikő
Marada, Gyula
Jeges, Sára
Tóth, Vilmos
author_facet Krajczár, Károly
Varga, Enikő
Marada, Gyula
Jeges, Sára
Tóth, Vilmos
author_sort Krajczár, Károly
collection PubMed
description BACKGROUND: The purpose of this study was to investigate the consistency of working length control between hand instrumentation in comparison to engine driven Mtwo nickel-titanium rotary files. MATERIAL AND METHODS: Forty extracted maxillary molars were selected and divided onto two parallel groups. The working lengths of the mesiobuccal root canals were estimated. The teeth were fixed in a phantom head. The root canal preparation was carried out group 1 (n=20) with hand K-files, (VDW, Munich, Germany) and group 2 (n=20) with Mtwo instruments (VDW, Munich, Germany). Vestibulo-oral and mesio-distal directional x-ray images were taken before the preparation with #10 K-file, inserted into the mesiobuccal root canal to the working length, and after preparation with #25, #30 and #40 files. Working lenght changes were detected with measurements between the radiological apex and the instrument tips. RESULTS: In the Mtwo group a difference in the working competency (p<0.05) could be noticed only in the vestibulo-oral direction from #10 to #40 file. The hand instrument group showed a significant difference in working length competency for each larger file size (p<0.05) (ANOVA). Regression analysis in the hand instrumentation group indicated a working length decrease with a mean of 0,2 mm after each consecutive file size (p<0.01). CONCLUSIONS: The outcome of our trial indicated a high consistency in working length control for root canal preparation under simulated clinical condition using Mtwo rotary files. Mtwo NiTi rotary file did therefore proved to be more accurate in comparison to the conventional hand instrumentation. Key words:Working length, Mtwo, nickel-titanium, hand preparation, engine driven preparation.
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spelling pubmed-48083072016-04-01 Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system Krajczár, Károly Varga, Enikő Marada, Gyula Jeges, Sára Tóth, Vilmos J Clin Exp Dent Research BACKGROUND: The purpose of this study was to investigate the consistency of working length control between hand instrumentation in comparison to engine driven Mtwo nickel-titanium rotary files. MATERIAL AND METHODS: Forty extracted maxillary molars were selected and divided onto two parallel groups. The working lengths of the mesiobuccal root canals were estimated. The teeth were fixed in a phantom head. The root canal preparation was carried out group 1 (n=20) with hand K-files, (VDW, Munich, Germany) and group 2 (n=20) with Mtwo instruments (VDW, Munich, Germany). Vestibulo-oral and mesio-distal directional x-ray images were taken before the preparation with #10 K-file, inserted into the mesiobuccal root canal to the working length, and after preparation with #25, #30 and #40 files. Working lenght changes were detected with measurements between the radiological apex and the instrument tips. RESULTS: In the Mtwo group a difference in the working competency (p<0.05) could be noticed only in the vestibulo-oral direction from #10 to #40 file. The hand instrument group showed a significant difference in working length competency for each larger file size (p<0.05) (ANOVA). Regression analysis in the hand instrumentation group indicated a working length decrease with a mean of 0,2 mm after each consecutive file size (p<0.01). CONCLUSIONS: The outcome of our trial indicated a high consistency in working length control for root canal preparation under simulated clinical condition using Mtwo rotary files. Mtwo NiTi rotary file did therefore proved to be more accurate in comparison to the conventional hand instrumentation. Key words:Working length, Mtwo, nickel-titanium, hand preparation, engine driven preparation. Medicina Oral S.L. 2016-04-01 /pmc/articles/PMC4808307/ /pubmed/27034752 http://dx.doi.org/10.4317/jced.52561 Text en Copyright: © 2016 Medicina Oral S.L. http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Krajczár, Károly
Varga, Enikő
Marada, Gyula
Jeges, Sára
Tóth, Vilmos
Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title_full Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title_fullStr Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title_full_unstemmed Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title_short Comparison of working length control consistency between hand K-files and Mtwo NiTi rotary system
title_sort comparison of working length control consistency between hand k-files and mtwo niti rotary system
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4808307/
https://www.ncbi.nlm.nih.gov/pubmed/27034752
http://dx.doi.org/10.4317/jced.52561
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