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dc.contributor.author김범산-
dc.contributor.author김예미-
dc.date.accessioned2018-01-12T16:30:14Z-
dc.date.available2018-01-12T16:30:14Z-
dc.date.issued2018-
dc.identifier.issn0099-2399-
dc.identifier.urihttp://dspace.ewha.ac.kr/handle/2015.oak/239776-
dc.description.abstractIntroduction The aim of this study was to determine the morphologic characteristics of mandibular first molars having 2 canals in distal roots. Interorifice distance, buccal bone thickness, and root curvature were evaluated using cone-beam computed tomography images in a Korean population. Methods In total, 1958 mandibular first molars were evaluated in axial, coronal, sagittal, and paraxial planes. Distal roots having 2 canals were classified according to their root and canal shapes (2 roots, 2 canals [2R2C]; 1 root, 2 canals with 2 apical foramina [1R2C(2-2)]; and 1 root, 2 canals with 1 apical foramen [1R2C(2-1)]). The distances between orifices and the distance from the apex to the buccal bone plate were measured for each root canal shape (2R2C, 1R2C[2-2], and 1R2C[2-1]). The curvature of distolingual (DL) roots was classified according to severity using 3-dimensional reconstructed images, and the direction of curvature was determined. The relationships of these characteristics to sex and side were evaluated. Results The prevalences of 2R2C, 1R2C(2-2), and 1R2C(2-1) were 25.89%, 10.32%, and 14.15%, respectively. The distances between distobuccal (DB) and DL orifices were 3.77 ± 0.74 mm for 2R2C, 3.02 ± 0.65 mm for 1R2C(2-2), and 2.44 ± 0.64 mm for 1R2C(2-1). The distances from the buccal plate to the DB canal were 3.84 ± 1.35 mm for 2R2C, 5.33 ± 1.41 mm for 1R2C(2-2), and 5.96 ± 1.63 mm for 1R2C(2-1). The distance from the buccal plate to the DL canal was 9.85 ± 1.46 mm for 2R2C, and 8.28 ± 1.50 mm for 1R2C(2-2). All distances differed significantly according to root canal configurations, and all were greater in men than women (P <.05), except for the DB-DL orifice distance in 1R2C(2-2) and the DB to buccal cortical plate distance in all root configurations (P >.05). No significant difference between the left and right sides was found (P >.05). The prevalence of most severely curved DL roots (type III) was 62.92%, and the direction was commonly toward the buccal side (69.03%). Conclusions The prevalence of mandibular first molars having 2 canals in distal roots was more than 50% in a Korean population. Interorifice distances between DB and DL canals and distances from the apex to the buccal cortical plate differed according to root and canal numbers and shapes. © 2017 American Association of Endodontists-
dc.languageEnglish-
dc.publisherElsevier Inc.-
dc.subjectBuccal bone thickness-
dc.subjectcone-beam computed tomography-
dc.subjectdistolingual root-
dc.subjectinterorifice distance-
dc.subjectKorean-
dc.subjectmandibular first molar-
dc.subjectroot curvature-
dc.titleMorphological Characteristics and Classification of Mandibular First Molars Having 2 Distal Roots or Canals: 3-Dimensional Biometric Analysis Using Cone-beam Computed Tomography in a Korean Population-
dc.typeArticle-
dc.relation.issue1-
dc.relation.volume44-
dc.relation.indexSCI-
dc.relation.indexSCIE-
dc.relation.indexSCOPUS-
dc.relation.startpage46-
dc.relation.lastpage50-
dc.relation.journaltitleJournal of Endodontics-
dc.identifier.doi10.1016/j.joen.2017.08.005-
dc.identifier.scopusid2-s2.0-85031106265-
dc.author.googleKim Y.-
dc.author.googleRoh B.-D.-
dc.author.googleShin Y.-
dc.author.googleKim B.S.-
dc.author.googleChoi Y.-L.-
dc.author.googleHa A.-
dc.contributor.scopusid김범산(35223582600)-
dc.contributor.scopusid김예미(36059180800)-
dc.date.modifydate20180112145922-
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의학전문대학원 > 의학과 > Journal papers
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