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Rezension von Nils Widera – eingestellt am 11.07.2015
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Lack of Causal Relationship between Dentinal Microcracks
and Root Canal Preparation with Reciprocation Systems
Gustavo De-Deus, DDS, MSc, PhD,* Emmanuel Jo~ao Nogueira Leal Silva, DDS, MSc, PhD,*
Juliana Marins, DDS, MSc, PhD,† Erick Souza, DDS, MSc, PhD,‡
Aline de Almeida Neves, DDS, MSc, PhD,* Felipe Gonc¸alves Belladonna, DDS, MSc,†
Haimon Alves, MSc,§ Ricardo Tadeu Lopes, MSc, DSc,§
and Marco Aur_elio Versiani, DDS, MSc, PhD
J Endod 2014;40:1447–1450
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 groupC—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.