Accuracy of High-resolution Small-volume Cone-beam Computed Tomography in Detecting Complex Anatomy of the Apical Isthmi: Ex Vivo Analysis.

Autor:	Tolentino ES; Department of Dentistry, State University of Maringá, Maringá, PR, Brazil. Electronic address: elen_tolentino@hotmail.com., Amoroso-Silva PA; Department of Restorative Dentistry, State University of Londrina, Londrina, PR, Brazil., Alcalde MP; Departments of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil., Honório HM; Department of Pediatrics Dentistry, Orthodontics, and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil., Iwaki LCV; Department of Dentistry, State University of Maringá, Maringá, PR, Brazil., Rubira-Bullen IRF; Department of Surgery, Stomatology, Pathology, and Radiology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil., Húngaro-Duarte MA; Departments of Operative Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil.
Jazyk:	angličtina
Zdroj:	Journal of endodontics [J Endod] 2018 Dec; Vol. 44 (12), pp. 1862-1866. Date of Electronic Publication: 2018 Nov 01.
DOI:	10.1016/j.joen.2018.08.015
Abstrakt:	Introduction: The purpose of this study was to evaluate the accuracy of small-volume cone-beam computed tomography (CBCT) to detect and measure isthmi in the apical root canals of mandibular molars by using micro-computed tomography (μ-CT) as the reference standard. Methods: Forty mandibular first molars selected on the basis of μ-CT scan and presenting isthmi in the apical 3-mm mesial roots were scanned by using the highest-resolution settings of a small-volume CBCT unit. Isthmi lengths were measured and compared between both μ-CT and CBCT images to study the accuracy of CBCT readings. Quantitative data for sensitivity rate were depicted as percentage value with 95% confidence interval. Results were analyzed by using linear regression between true lengths (μ-CT) and CBCT lengths, Bland-Altman plot and t test, at α = 0.05. Results: CBCT sensitivity for isthmi detection was 65% (95% confidence interval, 0.4667-0.8333). An average of 74.7% of the lengths could be measured, and differences among the lengths in μ-CT and CBCT were significant (P < .05; mean, 0.756 ± 0.655; t test), showing that there was no agreement between both methods. Conclusions: Accuracy of identifying apical isthmi of mandibular molars was highly influenced by the evaluation method. Small-volume CBCT imaging could not detect and measure apical isthmi length accurately. Moreover, using high-resolution settings in CBCT, it was not reliable to forecast the actual apical root canal anatomy. (Copyright © 2018 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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