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Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a Korean population: Variations in the number of roots and canals and the incidence of fusion

Title
Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a Korean population: Variations in the number of roots and canals and the incidence of fusion
Authors
Kim Y.Lee S.-J.Woo J.
Ewha Authors
김예미
SCOPUS Author ID
김예미scopus
Issue Date
2012
Journal Title
Journal of Endodontics
ISSN
0099-2399JCR Link
Citation
vol. 38, no. 8, pp. 1063 - 1068
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Introduction: The aim of this study was to identify the root and canal morphology of the maxillary first and second molars in a Korean population by analyzing cone-beam computed tomography (CBCT) images. Methods: Maxillary first (n = 814) and second (n = 821) molars from Korean patients (n = 415) of Mongoloid origin were examined by using in vivo CBCT methods. The number and configuration of roots, the number of root canals, and the canal configuration according to Vertucci's classification were determined. Results: Single roots were found in 0.25% of the first molars and 4.63% of the second molars. The incidence of fused roots was 0.73% in the first molars and 10.71% in the second molars. In 802 3-rooted maxillary first molars, additional canals were found in 63.59% of the mesiobuccal (MB) roots and 1.25% of the distobuccal (DB) roots. In 660 3- or 4-rooted maxillary second molars, additional canals were found in 34.39% of the MB roots, 0.30% of the midbuccal roots, 0.30% of the DB roots, and 1.82% of the palatal roots. Bilateral symmetry of the MB roots was found in 88.10% of the first molars and 82.07% of the second molars. Conclusions: The root and canal configuration of a Korean population showed different features from those of other populations. We report the incidence of rare morphologic variations, a single root and 3 buccal roots, that have not been described except for in case reports. CBCT scans can enhance the understanding of root canal anatomy, with the potential of improving the outcome of endodontic treatment. © 2012 American Association of Endodontists.
DOI
10.1016/j.joen.2012.04.025
Appears in Collections:
의과대학 > 의학과 > Journal papers
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