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Mandibular second molar root canal morphology and variants in a Korean subpopulation

Title
Mandibular second molar root canal morphology and variants in a Korean subpopulation
Authors
Kim, S. Y.Kim, B. S.Kim, Y.
Ewha Authors
김범산김예미
SCOPUS Author ID
김범산scopus; 김예미scopus
Issue Date
2016
Journal Title
INTERNATIONAL ENDODONTIC JOURNAL
ISSN
0143-2885JCR Link1365-2591JCR Link
Citation
vol. 49, no. 2, pp. 136 - 144
Keywords
cone-beam computed tomographyC-shaped canalKoreanmandibular second molarO-shaped canalroot and canal morphology
Publisher
WILEY-BLACKWELL
Indexed
SCIE; SCOPUS WOS scopus
Abstract
AimTo determine the root canal anatomy of mandibular second molars in a Korean population by analysing cone-beam computed tomography (CBCT) images. MethodologyThe CBCT images of 960 subjects were examined. The number and configuration of roots and canals were categorized according to Vertucci's and modified Melton's classifications. ResultsOf the 1920 mandibular second molars, 41% had one root, 58% had two roots, and <1% had three roots. In the mesial roots of two-rooted molars, Vertucci's Type lV (44%) and Type II (37.75%) canals were most frequent. The prevalence of C-shaped roots was 40%, and C-shaped roots in combination with additional mesiolingual or distolingual roots were found in <1% of molars. Interestingly, O-shaped canals were detected in 0.10% of the molars. Of the C-shaped roots, the most common configuration types were Melton's Type I (66%) in the coronal region and Melton's Type III (56%) in the apical region. The prevalence of C-shaped roots was higher in females (47%) than in males (32%) (P<0.001) and did not differ with age (P=0.497) or tooth position (P=0.514). Most (82%) C-shaped canals were bilateral (P<0.001). ConclusionsA high prevalence of C-shaped canals and a low incidence of three-rooted molars were observed in the mandibular second molars of the Korean subpopulation studied.
DOI
10.1111/iej.12437
Appears in Collections:
의과대학 > 의학과 > Journal papers
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