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Article: C-shaped canal system in mandibular second molars: Part I - Anatomical features

TitleC-shaped canal system in mandibular second molars: Part I - Anatomical features
Authors
Issue Date2004
PublisherElsevier Inc. The Journal's web site is located at http://www.jendodon.com
Citation
Journal Of Endodontics, 2004, v. 30 n. 12, p. 899-903 How to Cite?
AbstractThe purpose of this study was to investigate the anatomical features of C-shaped root canal system in mandibular second molars using micro-computed tomography (μCT). Fifty-eight extracted mandibular second molars with fused roots were collected from a native Chinese population. The teeth were scanned into layers of 0.5-mm thickness by μCT and measurements were made at eleven levels. The ratio of the depth of the deepest part of the groove to the buccal-lingual thickness of the cross-section of the root was calculated for each tooth. The canal shapes of the scanned cross-sections were assessed and classified according to a modified Melton's method. Results were subject to the Kruskal-Wallis test. Of the 58 molars, 54 had a C-shaped canal system with a mean groove-to-thickness ratio of 47.96%; the four teeth without a C-shaped canal had a mean ratio of 14.82%. Most orifices (98.1%) were found within 3 mm below the cementoenamel junction. Of teeth with a C-shape canal system, a majority demonstrated an orifice with an uninterrupted "C" configuration. Seventeen canals divided in the apical portion, most of which did so within 2 mm from the apex. The cross-sectional shape varied drastically along the length of the canal. Teeth with a high groove-to-thickness ratio had at least one section with C1, C2, or C3 configuration. The canal shape in middle and apical thirds of C-shaped canal systems could not be predicted on the basis of the shape at the orifice level. Section 2 of this paper addressed the correlation between the radiographic appearance and these μCT images.
Persistent Identifierhttp://hdl.handle.net/10722/66107
ISSN
2015 Impact Factor: 2.904
2015 SCImago Journal Rankings: 1.681
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFan, Ben_HK
dc.contributor.authorCheung, GSPen_HK
dc.contributor.authorFan, Men_HK
dc.contributor.authorGutmann, JLen_HK
dc.contributor.authorBian, Zen_HK
dc.date.accessioned2010-09-06T05:43:38Z-
dc.date.available2010-09-06T05:43:38Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of Endodontics, 2004, v. 30 n. 12, p. 899-903en_HK
dc.identifier.issn0099-2399en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66107-
dc.description.abstractThe purpose of this study was to investigate the anatomical features of C-shaped root canal system in mandibular second molars using micro-computed tomography (μCT). Fifty-eight extracted mandibular second molars with fused roots were collected from a native Chinese population. The teeth were scanned into layers of 0.5-mm thickness by μCT and measurements were made at eleven levels. The ratio of the depth of the deepest part of the groove to the buccal-lingual thickness of the cross-section of the root was calculated for each tooth. The canal shapes of the scanned cross-sections were assessed and classified according to a modified Melton's method. Results were subject to the Kruskal-Wallis test. Of the 58 molars, 54 had a C-shaped canal system with a mean groove-to-thickness ratio of 47.96%; the four teeth without a C-shaped canal had a mean ratio of 14.82%. Most orifices (98.1%) were found within 3 mm below the cementoenamel junction. Of teeth with a C-shape canal system, a majority demonstrated an orifice with an uninterrupted "C" configuration. Seventeen canals divided in the apical portion, most of which did so within 2 mm from the apex. The cross-sectional shape varied drastically along the length of the canal. Teeth with a high groove-to-thickness ratio had at least one section with C1, C2, or C3 configuration. The canal shape in middle and apical thirds of C-shaped canal systems could not be predicted on the basis of the shape at the orifice level. Section 2 of this paper addressed the correlation between the radiographic appearance and these μCT images.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.jendodon.comen_HK
dc.relation.ispartofJournal of Endodonticsen_HK
dc.rightsThe Journal of Endodontics. Copyright © Lippincott Williams & Wilkins.en_HK
dc.subject.meshAnatomy, Cross-Sectionalen_HK
dc.subject.meshAsian Continental Ancestry Groupen_HK
dc.subject.meshChinaen_HK
dc.subject.meshDental Pulp Cavity - anatomy & histology - radiographyen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMandibleen_HK
dc.subject.meshMolar - anatomy & histologyen_HK
dc.subject.meshOdontometryen_HK
dc.subject.meshStatistics, Nonparametricen_HK
dc.subject.meshTomography, X-Ray Computed - methodsen_HK
dc.subject.meshTooth Root - anatomy & histologyen_HK
dc.titleC-shaped canal system in mandibular second molars: Part I - Anatomical featuresen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0099-2399&volume=30 &issue=12&spage=899&epage=903&date=2004&atitle=C-shaped+canal+system+in+mandibular+second+molars:+Part+I+-+Anatomical+featuresen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1097/01.don.0000136207.12204.e4-
dc.identifier.pmid15564874-
dc.identifier.scopuseid_2-s2.0-10044267934en_HK
dc.identifier.hkuros96525en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-10044267934&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume30en_HK
dc.identifier.issue12en_HK
dc.identifier.spage899en_HK
dc.identifier.epage903en_HK
dc.identifier.isiWOS:000225327200017-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridFan, B=7102879328en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK
dc.identifier.scopusauthoridFan, M=7201970773en_HK
dc.identifier.scopusauthoridGutmann, JL=7103288888en_HK
dc.identifier.scopusauthoridBian, Z=7103314705en_HK

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