Lack of Causal Relationship between Dentinal Microcracks and Root Canal Preparation with Reciprocation Systems

Authors: G. De-Deus, E. J. Noqueira da Silva, J. Marins, E. M. Souza, A. de Almeida Neves, F. Gonçalves Belladonna, H. Alves, R. T. Lopes, M. A. Versiani
Year: 2014
Rubrics: Microcracks
Keywords: dentinal microcracks, NiTi instruments, nickel-titanium rotary file, micro-cracks, microcracks, nickel-titanium

Introduction: This study aimed to evaluate the frequency of dentinal microcracks observed after root canal preparation with 2 reciprocating and a conventional fullsequence rotary system using micro–computed tomographic analysis.

Methods: Thirty mesial roots of mandibular molars presenting a type II Vertucci canal configuration were scanned at an isotropic resolution of 14.16 mm. The sample was randomly assigned to 3 experimental groups (n = 10) according to the system used for the root canal preparation: group A—Reciproc (VDW, Munich, Germany), group B—WaveOne (Dentsply Maillefer, Baillagues, Switzerland), and group C—BioRaCe (FKG Dentaire, La-Chaux-de-Fonds, Switzerland). Second and third scans were  taken after the root canals were prepared with instruments sizes 25 and 40, respectively. Then, pre- and postoperative cross-section images of the roots (N = 65,340) were screened to identify the presence of dentinal defects.

Results: Dentinal microcracks were observed in 8.72% (n = 5697), 11.01% (n = 7197), and 7.91% (n = 5169) of the cross-sections from groups A (Reciproc), B (WaveOne), and C (BioRaCe), respectively. All dentinal defects identified in the  postoperative cross-sections were also observed in the corresponding preoperative images. Conclusions: No causal relationship between dentinal microcrack formation and canal preparation procedures with Reciproc, WaveOne, and BioRaCe systems  was observed. (J Endod 2014;-:1–4)

Link to study: 

Back to list

We are using cookies to give you the best experience on our site. Cookies are files stored in your browser and are used by most websites to help personalize your web experience. By using this site, you agree to our Terms of use, Privacy Policy and Use of Cookies for performance, functionality and advertising.