The images and videos of "The Root Canal Anatomy Project" blog were developed at the Laboratory of Endodontics of Ribeirao Preto Dental School - University of Sao Paulo - and may be freely used for attributed noncommercial educational purposes by educators, scholars, student and clinicians. It means that all material used should include proper attribution and citation ( In such cases, this information should be linked to the image in a manner compatible with such instructional objectives. Enjoy!

April 24, 2014

Publication JOE


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.

No comments: