Home Subscription Services
 
   

 
Endodontic Practice Today
ENDO Home Page
About the Editor
Editorial Board
Submit
Author Guidelines
Submission Form
Reprints / Articles
Permissions
Advertising
MEDLINE Search
Official Site
 
 
 
 
 
FacebookTwitterYouTube
Quintessence Publishing: Journals: ENDO

 

ENDO - Endodontic Practice Today

Edited by Antionio Bonaccorso, Bun San Chong, Edgar Schafer, and Luc van der Sluis

Official Publication of the Belgian Association for Endodontology and Traumatology (BAET), the French Society of Endodontics (SFE) and the Norwegian Endodontic Society (NEF)

ISSN (print) 1753-2809 • ISSN (online) 1753-2817

Publication:

Spring 2014
Volume 8 , Issue 1



Pages: 31-36
Back
Share Abstract:

Torsional resistance and toughness of two nickel-titanium instruments: Reciproc versus WaveOne

Lopes, Hélio P. / Vieira, Márcia V.B. / Elias, Carlos N. / Siqueira Jr., José F. / Vieira, Victor T.L. / Mangelli, Marcelo / Neves, Monica A.S. / Paiva, Eloana S. / de Paula, Cintia B. / Soares, Renata G.

Introduction: This study compared the angular deflection at failure, maximum torque, and toughness of two nickel-titanium (NiTi) instruments under torsional stress: Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland). Two NiTi instruments: Mtwo (VDW) and ProTaper (Dentsply Maillefer) served as controls.
Methods: The instruments were subjected to torsional assays to evaluate the maximum torque and angular deflection at failure. A stress-strain (N × mm) curve was plotted using specific software and toughness was calculated as the integral of the area under the curve. Data obtained were statistically evaluated by ANOVA and Student-Newman-Keuls (SNK) test for multiple comparisons, with the significance level set at 5%.
Results: Significant difference was observed in the angular deflection at failure for pairwise comparisons between ProTaper and the other instruments (P < 0.05). No significant differences were observed in the comparisons between the other instruments (P > 0.05). The maximum torque was ranked as follows: ProTaper > Reciproc > WaveOne > Mtwo; significant differences were observed between all instruments (P < 0.05). Differences in toughness were also detected between all instruments tested (P < 0.05), except for Reciproc versus WaveOne.
Conclusion: The findings from this study revealed that Reciproc and WaveOne displayed similar mechanical behaviour in terms of angular deflection and toughness, typical of ductile metallic materials under torsion. This suggests that both instruments absorb comparable amounts of energy until fracture. Regarding torque, Reciproc exhibited the best results in comparison with WaveOne.

Keywords: angular deflection, endodontic instruments, maximum torque, torsional fracture, toughness

Full Text PDF File | Order Article

 

 
  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog