Abstract
Introduction
This study aimed to describe the anatomy of mandibular central and lateral incisors
using micro–computed tomographic imaging.
Methods
One hundred mandibular incisors were scanned in a micro–computed tomographic device
using an isotropic resolution of 22.9 μm. The anatomy of each tooth (length of the
roots, presence and location of accessory canals and apical deltas, and number of
canals) as well as the 2- and 3-dimensional morphologic aspects of the canal (area,
roundness, diameter, volume, surface area, and structure model index) were evaluated.
Data were statistically compared using the Student t test (alpha = 0.05).
Results
The mean lengths of the mandibular central and lateral incisors were 20.71 and 21.56
mm, respectively. Most of the central (60%) and lateral (74%) incisors had no accessory
canals. An apical delta was observed in only 1 specimen. The cross-section analysis
of the apical third showed the presence of 1, 2, or 3 canal orifices. No statistical
difference was observed in the comparison of the 2- and 3-dimensional morphologic
parameters between central and lateral incisors (P < .05). The qualitative analyses of the 3-dimensional models of the root canal systems
of the central and lateral incisor teeth confirm that the most prevalent configurations
were Vertucci's types I (50% and 62%, respectively) and III (28%).
Conclusions
Overall, mandibular central and lateral incisors were similar in terms of the 2- and
3-dimensional analyzed parameters. Vertucci's types I and III were the most prevalent
canal configurations of the mandibular incisors; however, 8 new types have also been
described.
Key Words
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Article info
Publication history
Published online: October 18, 2013
Identification
Copyright
© 2014 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.
