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CC BY 4.0 · Eur J Dent 2023; 17(03): 699-705
DOI: 10.1055/s-0042-1750694
Original Article

Microtomographic Assessment of the Shaping Ability of the Hyflex CM and XP-endo Shaper Systems in Curved Root Canals

Wania Christina Figueiredo Dantas
1   Department of Endodontics, São Leopoldo Mandic College, São Leopoldo Mandic Research Institute, Campinas, São Paulo, Brazil
,
Marilia Fagury Videira Marceliano-Alves
2   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Eduardo Fagury Videira Marceliano
3   Department of Dental Prosthesis, Belem General Hospital, Belém, Pará, Brazil
,
Eduardo Fernandes Marques
4   President Antonio Carlos University, Porto Nacional, ITPAC, Porto/ FAPAC, Palmas, Brazil
,
Thais Machado de Carvalho Coutinho
2   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Flavio R.F. Alves
2   Department of Endodontics and Dental Research, Iguaçu University, Nova Iguaçu, Brazil
,
Alexandre Sigrist De Martin 
1   Department of Endodontics, São Leopoldo Mandic College, São Leopoldo Mandic Research Institute, Campinas, São Paulo, Brazil
,
Rina Andrea Pelegrine 
1   Department of Endodontics, São Leopoldo Mandic College, São Leopoldo Mandic Research Institute, Campinas, São Paulo, Brazil
,
Ricardo Tadeu Lopes
5   Departament of Nuclear Energy, Rio de Janeiro Federal University, Rio de Janeiro, Brazil
,
Carlos Eduardo da Silveira Bueno
1   Department of Endodontics, São Leopoldo Mandic College, São Leopoldo Mandic Research Institute, Campinas, São Paulo, Brazil
› Author Affiliations Funding This study was supported by grants from Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazilian Governmental Institutions.
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Abstract

Objective This study compared the shaping ability of the Hyflex CM and XP-endo Shaper rotary file systems in curved mesial canals of mandibular molars using micro-computed tomography.

Material and Methods Seventeen mesial roots of extracted first mandibular molars with two independent mesial canals were scanned before and after root canal preparation with the tested rotatory file systems. Each mesial canal from the same specimen was prepared with one of the two systems. The parameters analyzed were canal centering (transportation) for the cervical, middle, and apical segments, as well as for the entire canal (0–10 mm from the apex); and canal volume increase, canal surface area increase, and unprepared canal walls for two segments, 0 to 4 mm and 0 to 10 mm from the apex.

Results There was no significant difference between both systems regarding canal centering (transportation), volume increase, and unprepared canal walls for the 0 to 10 mm segment (p> 0.05); however, a significant difference was observed for the 0 to 4 mm segment (p <0.01), where the Hyflex CM left 28.46% of unprepared walls and XP-endo Shaper left 13.26%.

Conclusions The shaping ability of the two tested rotatory file systems in mesial roots of first mandibular molars was similar for all parameters in all the segments evaluated, except for the 0 to 4 mm segment, where XP-endo Shaper left a smaller area of unprepared canal walls than Hyflex CM.

Keywords

root canal therapy - microtomographic analysis - unprepared canal walls - rotary instruments - Hyflex CM - XP-endo Shaper - curved canals


Publication History

Article published online:
11 October 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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