Comparative assessment of the effects of Gates-Glidden, Largo, LA-Axxess, and New Brazilian Drill CPdrill on coronal pre-enlargement: cone-beam computed tomographic analysis.

Autor:	Flores CB; Public Practice, Santa Maria, Rio Grande do Sul, Brazil. Electronic address: cbfendo@gmail.com., Montagner F; Endodontic Division, Department of Conservative Dentistry, Federal University of Rio Grande do Sul, Rio Grande do Sul, Brazil., Gomes BP; Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil., Dotto GN; Radiology Division, Department of Stomatology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil., da Silva Schmitz M; Endodontic Division, Department of Stomatology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of endodontics [J Endod] 2014 Apr; Vol. 40 (4), pp. 571-4. Date of Electronic Publication: 2013 Oct 16.
DOI:	10.1016/j.joen.2013.08.028
Abstrakt:	Introduction: The removal of dentin interferences from the cervical third of root canals is essential for their correct cleaning and shaping and to facilitate access of endodontic instruments to the critical apical region. In mandibular molars, the concavity observed in the furcation area reduces dentin thickness, making this region more susceptible to perforation. The present ex vivo study used cone-beam computed tomographic imaging to compare 3 rotary burs with a new rotary bur recently launched in Brazil (ie, CPdrill; Helse Industry and Commerce Ltda, Santa Rosa, São Paulo, Brazil) regarding the amount of dentin removal from the distal wall of the mesial root of mandibular first molars. Methods: A total of 40 root canals were selected and randomly divided into 4 groups for cervical preparation: Gates-Glidden burs #2 and #3 (Dentsply Maillefer, Ballaigues, Switzerland), Largo burs #1 and #2 (Dentsply Maillefer), LA-Axxess burs #1 and #2 (SybronEndo, Glendora, CA), and CPdrill burs (1-size only). Dentin thickness in the distal wall of mesial canals at 2 mm from the furcation was measured using I-CATvision software before and after cervical preparation. Results: There was no statistically significant difference between groups regarding residual dentin thickness after instrumentation with the drills (P = .684). Conclusions: It was concluded that CPdrill is safe for use in cervical preparation of the mesial root of mandibular first molars because it did not promote excessive dentin removal on distal walls. (Copyright © 2014 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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