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Comparative Study
. 2014 Nov;40(11):1865-8.
doi: 10.1016/j.joen.2014.07.012. Epub 2014 Sep 26.

Detection of a second mesiobuccal canal in maxillary molars by swept-source optical coherence tomography

Yoshiko Iino  1 , Arata Ebihara  2 , Toshihiko Yoshioka  1 , Jun Kawamura  1 , Satoshi Watanabe  1 , Takahiro Hanada  1 , Kiwako Nakano  1 , Yasunori Sumi  3 , Hideaki Suda  1
Affiliations
Comparative Study

Detection of a second mesiobuccal canal in maxillary molars by swept-source optical coherence tomography

Yoshiko Iino et al. J Endod. 2014 Nov.

Abstract

Introduction: The purpose of this study was to investigate the ability of swept-source optical coherence tomographic (SS-OCT) imaging to detect a second mesiobuccal canal (MB2) in maxillary molars compared with visual inspection (VI) and dental operating microscopy (DOM).

Methods: Forty extracted human maxillary molars were examined. After the removal of half the crown and access cavity preparation, the existence of MB2 canals was confirmed based on cross-sectional images of each tooth obtained by micro-computed tomographic scanning as the reference standard. Then, the pulp chamber floor was scanned by SS-OCT imaging. Three dentists independently evaluated the SS-OCT images and the pulp chamber floor under VI and DOM for the presence of MB2 canals. The detection rate of MB2 canals for SS-OCT imaging, VI, and DOM was calculated, and statistical analysis was performed.

Results: MB2 canals existed in 19 of 40 teeth (47.5%) using micro-CT imaging. Sensitivity of DOM (0.947) was significantly higher than that of SS-OCT imaging (0.632). Specificity of SS-OCT imaging (0.714) was significantly higher than that of DOM (0.333). No statistically significant differences were found for accuracy among the 3 methods. Kappa values of SS-OCT, VI, and DOM were 0.526, 0.417, and 0.326, respectively.

Conclusions: SS-OCT imaging is noninvasive, involves no ionizing radiation, and is accurate for the detection of MB2 canals.

Keywords: Canal detection; mesiobuccal canal; molar; optical coherence tomography.

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