Cargando…
Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study
AIMS: The purpose of this study was to evaluate the resistance to torsional failure and cyclic fatigue resistance of ProTaper Next (PTN), WaveOne, and Mtwo files in continuous and reciprocating motion. SETTINGS AND DESIGN: Randomized control trial in a tertiary care setting. SUBJECTS AND METHODS: A...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872575/ https://www.ncbi.nlm.nih.gov/pubmed/27217634 http://dx.doi.org/10.4103/0972-0707.181937 |
_version_ | 1782432754344919040 |
---|---|
author | Varghese, N. O. Pillai, Rajesh Sujathen, U-Nu Sainudeen, Shan Antony, Abe Paul, Sinju |
author_facet | Varghese, N. O. Pillai, Rajesh Sujathen, U-Nu Sainudeen, Shan Antony, Abe Paul, Sinju |
author_sort | Varghese, N. O. |
collection | PubMed |
description | AIMS: The purpose of this study was to evaluate the resistance to torsional failure and cyclic fatigue resistance of ProTaper Next (PTN), WaveOne, and Mtwo files in continuous and reciprocating motion. SETTINGS AND DESIGN: Randomized control trial in a tertiary care setting. SUBJECTS AND METHODS: A total of 10 new size 25.06 taper PTN X2, 25.06 taper Mtwo files, and 25.08 taper WaveOne primary files each was selected. A custom fabricated cyclic fatigue testing device with a 70° angle of curvature and 3 mm width; curvature starting at 6 mm from the tip was used. All instruments were rotated and reciprocated till fracture occurred and time till fracture of each instrument was recorded in seconds. For torsional failure testing 5 mm tip of each file was embedded in composite resin block and uniform torsional stresses (300 rpm, 2.0 Ncm) were applied repetitively by an endodontic motor with auto stop mode until file succumbed to torsional failure. Number of load applications leading to failure was recorded. STATISTICAL ANALYSIS USED: Data were analyzed using t-test for equality of means, Pearson correlation, and ANOVA test. RESULTS: All the files showed superior resistance to cyclic fatigue in reciprocating motion when compared with continuous rotation mode. WaveOne primary files displayed maximum resistance to cyclic fatigue both in continuous and reciprocating motion. WaveOne primary files also demonstrated maximum resistance to torsional failure followed by PTN with Mtwo files exhibiting least resistance. CONCLUSIONS: Operating files in reciprocating motion enhances their cyclic fatigue resistance. WaveOne files showed maximum resistance to cyclic fatigue and torsional failure due to their cross-sectional diameter coupled M-Wire technology. |
format | Online Article Text |
id | pubmed-4872575 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-48725752016-05-23 Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study Varghese, N. O. Pillai, Rajesh Sujathen, U-Nu Sainudeen, Shan Antony, Abe Paul, Sinju J Conserv Dent Original Article AIMS: The purpose of this study was to evaluate the resistance to torsional failure and cyclic fatigue resistance of ProTaper Next (PTN), WaveOne, and Mtwo files in continuous and reciprocating motion. SETTINGS AND DESIGN: Randomized control trial in a tertiary care setting. SUBJECTS AND METHODS: A total of 10 new size 25.06 taper PTN X2, 25.06 taper Mtwo files, and 25.08 taper WaveOne primary files each was selected. A custom fabricated cyclic fatigue testing device with a 70° angle of curvature and 3 mm width; curvature starting at 6 mm from the tip was used. All instruments were rotated and reciprocated till fracture occurred and time till fracture of each instrument was recorded in seconds. For torsional failure testing 5 mm tip of each file was embedded in composite resin block and uniform torsional stresses (300 rpm, 2.0 Ncm) were applied repetitively by an endodontic motor with auto stop mode until file succumbed to torsional failure. Number of load applications leading to failure was recorded. STATISTICAL ANALYSIS USED: Data were analyzed using t-test for equality of means, Pearson correlation, and ANOVA test. RESULTS: All the files showed superior resistance to cyclic fatigue in reciprocating motion when compared with continuous rotation mode. WaveOne primary files displayed maximum resistance to cyclic fatigue both in continuous and reciprocating motion. WaveOne primary files also demonstrated maximum resistance to torsional failure followed by PTN with Mtwo files exhibiting least resistance. CONCLUSIONS: Operating files in reciprocating motion enhances their cyclic fatigue resistance. WaveOne files showed maximum resistance to cyclic fatigue and torsional failure due to their cross-sectional diameter coupled M-Wire technology. Medknow Publications & Media Pvt Ltd 2016 /pmc/articles/PMC4872575/ /pubmed/27217634 http://dx.doi.org/10.4103/0972-0707.181937 Text en Copyright: © Journal of Conservative Dentistry http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution NonCommercial ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non commercially, as long as the author is credited and the new creations are licensed under the identical terms. |
spellingShingle | Original Article Varghese, N. O. Pillai, Rajesh Sujathen, U-Nu Sainudeen, Shan Antony, Abe Paul, Sinju Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title | Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title_full | Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title_fullStr | Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title_full_unstemmed | Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title_short | Resistance to torsional failure and cyclic fatigue resistance of ProTaper Next, WaveOne, and Mtwo files in continuous and reciprocating motion: An in vitro study |
title_sort | resistance to torsional failure and cyclic fatigue resistance of protaper next, waveone, and mtwo files in continuous and reciprocating motion: an in vitro study |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872575/ https://www.ncbi.nlm.nih.gov/pubmed/27217634 http://dx.doi.org/10.4103/0972-0707.181937 |
work_keys_str_mv | AT vargheseno resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy AT pillairajesh resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy AT sujathenunu resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy AT sainudeenshan resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy AT antonyabe resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy AT paulsinju resistancetotorsionalfailureandcyclicfatigueresistanceofprotapernextwaveoneandmtwofilesincontinuousandreciprocatingmotionaninvitrostudy |