Neuer Artikel für den WURZELSPITZE Journal- Paten
Rezension von Nils Widera – eingestellt am 06.07.2015

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Micro–computed Tomographic Assessment on the Effect
of ProTaper Next and Twisted File Adaptive Systems
on Dentinal Cracks
JOE —

Gustavo De-Deus, DDS, MSc, PhD,* Felipe Gonc¸alves Belladonna, DDS, MSc,†
Erick Miranda Souza, DDS, MSc, PhD,‡ Emmanuel Jo~ao Nogueira Leal Silva, DDS, MSc, PhD,*
Aline de Almeida Neves, DDS, MSc, PhD,§ Haimon Alves, MSc,Ricardo Tadeu Lopes, MSc, DSc,
Marco Aurelio Versiani, DDS, MSc, PhD

Introduction: The aim of the present study was to evaluate the frequency of dentinal microcracks observed after root canal preparation with ProTaper Next (PTN;
Dentsply Maillefer, Ballaigues, Switzerland) and Twisted File Adaptive (TFA; SybronEndo, Orange, CA) systemsthrough micro–computed tomographic analysis.
Methods: Twenty moderately curved mesial roots of mandibular molars presenting a type II Vertucci canal configuration were randomly assigned to 2 experimental
groups (n = 10) according to the system used for the root canal preparation: PTN or TFA systems. The specimens were scanned through high-resolution micro–computed tomographic imaging before and after root canal preparation.
Afterward, pre- and postoperative cross-sectional images of the mesial roots (N = 25,820) were screened to identify the presence of dentinal defects. Results:
Dentinal microcracks were observed in 38.72% (n = 5150) and 30.27% (n = 3790) of the cross-sectional images in the PTN and TFA groups, respectively. All
dentinal defects identified in the postoperative scans were already present in the corresponding preoperative images.
Conclusions: Root canal preparation with PTN and TFA systems did not induce the formation of new dentinal microcracks.

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