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CC BY 4.0 · Eur J Dent 2022; 16(03): 663-668
DOI: 10.1055/s-0041-1739440
Original Article

Microtomographic Evaluation of Canal Centralization and Dentine Removal after Canal Preparation with Two Rotary Systems: HyFlex EDM and ProTaper Next

Vivian Ronquete
1   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Alexandre Sigrist de Martin
2   Department of Endodontics, São Leopoldo Mandic University, Campinas, Brazil
,
Karin Zuim
2   Department of Endodontics, São Leopoldo Mandic University, Campinas, Brazil
,
Thais Machado de Carvalho Coutinho
1   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Eduardo Fagury Videira Marceliano
3   Dental Clinic Department, Brazilian Army General Hospital of Belem, Belem, Brazil
,
Paula Avelar Da Silva Ribeiro Goulart
1   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Ricardo Tadeu Lopes
4   Laboratory for Nuclear Instrumentation, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
,
Carlos Eduardo Da Silveira Bueno
2   Department of Endodontics, São Leopoldo Mandic University, Campinas, Brazil
,
Marília Fagury Videira Marceliano-Alves
1   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
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Abstract

Objective This study compared the ProTaper Next (PTN; Dentsply Sirona, Tulsa, Oklahoma, United States) and HyFlex EDM (HEDM; Coltene/Whaledent AG, Alstätten, Switzerland) systems using micro–computed tomography (CT).

Materials and Methods Twenty-one mesial roots classified as Vertucci's type IV from extracted mandibular first molars with curvatures between 20 and 40 degrees were selected. The teeth were scanned using a micro-CT before and after root canal preparation by both systems, applied to the same root, in alternating canals. The following parameters were analyzed: canal centering, apical transportation, root canal diameter/root diameter.

Results No statistically significant differences between both systems were observed for any of the assessed morphological parameters (p > 0.05). All canals presented diameter enlargement of more than 40% in relation to root diameter in the cervical and middle segments. No statistically significant difference was noted between the HEDM and PTN groups. The wear percentage for the HEDM group in the cervical and middle thirds were 49.66 ± 8.65 and 46.48 ± 14.29, respectively, and 51.02 ± 11.81 and 45.48 ± 10.79 for the PTN group, respectively.

Conclusion Both systems displayed similar mandibular molar mesial canals preparation, with no differences noted for any of the assessed parameters. Both groups showed increased canal diameter in the cervical and middle thirds by more than 40%.

Keywords

micro–computed tomography - nickel–titanium alloy - apical transportation - ProTaper Next - HyFlex EDM


Publication History

Article published online:
11 January 2022

© 2022. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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