Exploring the Efficacy of 6 Preparation Systems for Achieving Minimal Root Canal Transportation: A Micro-CT Investigation

Felipe Gonçalves Belladonna; Tiago de Mello Guimarães; Emmanuel João Nogueira Leal Silva; Esio de Oliveira Vieira; Jong-Ki Lee; Evaldo de Almeida Rodrigues; Erick Miranda Souza; Marco Aurélio Versiani

doi:10.1016/j.joen.2023.09.004

Exploring the Efficacy of 6 Preparation Systems for Achieving Minimal Root Canal Transportation: A Micro-CT Investigation

J Endod. 2023 Dec;49(12):1722-1732. doi: 10.1016/j.joen.2023.09.004. Epub 2023 Sep 16.

Authors

Felipe Gonçalves Belladonna¹, Tiago de Mello Guimarães², Emmanuel João Nogueira Leal Silva³, Esio de Oliveira Vieira⁴, Jong-Ki Lee⁵, Evaldo de Almeida Rodrigues⁶, Erick Miranda Souza⁷, Marco Aurélio Versiani⁸

Affiliations

¹ Department of Endodontics, Fluminense Federal University, Rio de Janeiro, Brazil. Electronic address: felipebelladonna@hotmail.com.
² Department of Endodontics, Fluminense Federal University, Rio de Janeiro, Brazil.
³ Department of Endodontics, Fluminense Federal University, Rio de Janeiro, Brazil; Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil.
⁴ Department of Periodontics, Fluminense Federal University, Rio de Janeiro, Brazil.
⁵ Private Practice, Changwon, Republic of Korea.
⁶ Department of Endodontics, Feira de Santana State University, Feira de Santana, Bahia, Brazil.
⁷ Department of Dentistry II, Federal University of Maranhão, São Luís, Maranhão.
⁸ Dental Specialty Center, Brazilian Military Police, Minas Gerais, Brazil.

PMID: 37717910
DOI: 10.1016/j.joen.2023.09.004

Abstract

Introduction: This study aimed to assess the canal transportation with 6 preparation systems.

Methods: Sixty curved mesial roots of mandibular molars were scanned, and their root canals (n = 20 per group) were prepared with XP-endo Shaper, BioRace, ProTaper Next, Twisted File Adaptive, Reciproc, or Reciproc Blue systems. After preparation, a new scan was conducted, and transportation was determined by comparing the geometric center of the canal in 13,542 cross-sectional slices. The transport direction frequencies were recorded, and linear transport were compared using a Univariate GLM model and Tukey honestly significant difference tests (α = 5 %).

Results: Transportation was affected by the preparation system and root third (P < .05), with no significant effect observed for the root canal (P > .05). The Twisted File Adaptive had the highest transport (P < .05), and the lowest transports were observed with XP-endo Shaper, ProTaper Next, and BioRace (P < .05). Reciproc Blue and Reciproc showed intermediate results (P < .05). The apical and coronal third exhibited the lowest and highest transportation, respectively (P < .05). A significant interaction was observed between the preparation system and root third (P < .05). In the coronal third, transportation was mostly toward the disto-inside direction, whereas in the middle and apical thirds, transportation was predominantly toward the mesio-outside direction.

Conclusions: XP-endo Shaper had the lowest mean linear transportation followed by the ProTaper Next, BioRace, Reciproc Blue, and Reciproc systems. The Twisted File Adaptive system had the worst performance. The direction of transportation was generally toward the inner aspect of the canal at the coronal third and toward the outer aspect of the curve at the middle and apical thirds.

Keywords: Anatomy; endodontics; mandibular molar; micro-CT; reciprocating system; root canal; rotary system; transportation.

MeSH terms

Cross-Sectional Studies
Dental Pulp Cavity* / diagnostic imaging
Equipment Design
Root Canal Preparation* / methods
Root Canal Therapy
X-Ray Microtomography / methods