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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

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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
Contributors: Yemi Kim, Seung-Jong Lee, Jein Woo, Lee, Seung Jong
Publication Year: 2012
Subject Terms: Adolescent, Adult, Aged, Anatomic Variation, Asian Continental Ancestry Group, Cone-Beam Computed Tomography/methods, Dental Pulp Cavity/diagnostic imaging, Female, Fused Teeth/diagnostic imaging, Humans, Male, Maxilla/diagnostic imaging, Middle Aged, Molar/diagnostic imaging, Republic of Korea, Tooth Root/abnormalities, Tooth Root/diagnostic imaging, Young Adult, Canal morphology, cone-beam computed tomography, Korean, maxillary molars, root morphology
Description: 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 ; open
Document Type: article in journal/newspaper
Language: unknown
Relation: JOURNAL OF ENDODONTICS; J01393; https://ir.ymlib.yonsei.ac.kr/handle/22282913/90783; http://www.sciencedirect.com/science/article/pii/S0099239912004219; T201202472; 33534
Availability: https://ir.ymlib.yonsei.ac.kr/handle/22282913/90783
http://www.sciencedirect.com/science/article/pii/S0099239912004219
Rights: CC BY-NC-ND 2.0 KR ; https://creativecommons.org/licenses/by-nc-nd/2.0/kr/
Accession Number: edsbas.9C06B73D
Database: BASE
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  – Url: https://ir.ymlib.yonsei.ac.kr/handle/22282913/90783#
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: 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
– Name: Author
  Label: Contributors
  Group: Au
  Data: Yemi Kim<br />Seung-Jong Lee<br />Jein Woo<br />Lee, Seung Jong
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2012
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Adolescent%22">Adolescent</searchLink><br /><searchLink fieldCode="DE" term="%22Adult%22">Adult</searchLink><br /><searchLink fieldCode="DE" term="%22Aged%22">Aged</searchLink><br /><searchLink fieldCode="DE" term="%22Anatomic+Variation%22">Anatomic Variation</searchLink><br /><searchLink fieldCode="DE" term="%22Asian+Continental+Ancestry+Group%22">Asian Continental Ancestry Group</searchLink><br /><searchLink fieldCode="DE" term="%22Cone-Beam+Computed+Tomography%2Fmethods%22">Cone-Beam Computed Tomography/methods</searchLink><br /><searchLink fieldCode="DE" term="%22Dental+Pulp+Cavity%2Fdiagnostic+imaging%22">Dental Pulp Cavity/diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Female%22">Female</searchLink><br /><searchLink fieldCode="DE" term="%22Fused+Teeth%2Fdiagnostic+imaging%22">Fused Teeth/diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Humans%22">Humans</searchLink><br /><searchLink fieldCode="DE" term="%22Male%22">Male</searchLink><br /><searchLink fieldCode="DE" term="%22Maxilla%2Fdiagnostic+imaging%22">Maxilla/diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Middle+Aged%22">Middle Aged</searchLink><br /><searchLink fieldCode="DE" term="%22Molar%2Fdiagnostic+imaging%22">Molar/diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Republic+of+Korea%22">Republic of Korea</searchLink><br /><searchLink fieldCode="DE" term="%22Tooth+Root%2Fabnormalities%22">Tooth Root/abnormalities</searchLink><br /><searchLink fieldCode="DE" term="%22Tooth+Root%2Fdiagnostic+imaging%22">Tooth Root/diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Young+Adult%22">Young Adult</searchLink><br /><searchLink fieldCode="DE" term="%22Canal+morphology%22">Canal morphology</searchLink><br /><searchLink fieldCode="DE" term="%22cone-beam+computed+tomography%22">cone-beam computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Korean%22">Korean</searchLink><br /><searchLink fieldCode="DE" term="%22maxillary+molars%22">maxillary molars</searchLink><br /><searchLink fieldCode="DE" term="%22root+morphology%22">root morphology</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: 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 ; open
– Name: TypeDocument
  Label: Document Type
  Group: TypDoc
  Data: article in journal/newspaper
– Name: Language
  Label: Language
  Group: Lang
  Data: unknown
– Name: NoteTitleSource
  Label: Relation
  Group: SrcInfo
  Data: JOURNAL OF ENDODONTICS; J01393; https://ir.ymlib.yonsei.ac.kr/handle/22282913/90783; http://www.sciencedirect.com/science/article/pii/S0099239912004219; T201202472; 33534
– Name: URL
  Label: Availability
  Group: URL
  Data: https://ir.ymlib.yonsei.ac.kr/handle/22282913/90783<br />http://www.sciencedirect.com/science/article/pii/S0099239912004219
– Name: Copyright
  Label: Rights
  Group: Cpyrght
  Data: CC BY-NC-ND 2.0 KR ; https://creativecommons.org/licenses/by-nc-nd/2.0/kr/
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edsbas.9C06B73D
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsbas&AN=edsbas.9C06B73D
RecordInfo BibRecord:
  BibEntity:
    Languages:
      – Text: unknown
    Subjects:
      – SubjectFull: Adolescent
        Type: general
      – SubjectFull: Adult
        Type: general
      – SubjectFull: Aged
        Type: general
      – SubjectFull: Anatomic Variation
        Type: general
      – SubjectFull: Asian Continental Ancestry Group
        Type: general
      – SubjectFull: Cone-Beam Computed Tomography/methods
        Type: general
      – SubjectFull: Dental Pulp Cavity/diagnostic imaging
        Type: general
      – SubjectFull: Female
        Type: general
      – SubjectFull: Fused Teeth/diagnostic imaging
        Type: general
      – SubjectFull: Humans
        Type: general
      – SubjectFull: Male
        Type: general
      – SubjectFull: Maxilla/diagnostic imaging
        Type: general
      – SubjectFull: Middle Aged
        Type: general
      – SubjectFull: Molar/diagnostic imaging
        Type: general
      – SubjectFull: Republic of Korea
        Type: general
      – SubjectFull: Tooth Root/abnormalities
        Type: general
      – SubjectFull: Tooth Root/diagnostic imaging
        Type: general
      – SubjectFull: Young Adult
        Type: general
      – SubjectFull: Canal morphology
        Type: general
      – SubjectFull: cone-beam computed tomography
        Type: general
      – SubjectFull: Korean
        Type: general
      – SubjectFull: maxillary molars
        Type: general
      – SubjectFull: root morphology
        Type: general
    Titles:
      – TitleFull: 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
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Yemi Kim
      – PersonEntity:
          Name:
            NameFull: Seung-Jong Lee
      – PersonEntity:
          Name:
            NameFull: Jein Woo
      – PersonEntity:
          Name:
            NameFull: Lee, Seung Jong
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 01
              Type: published
              Y: 2012
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