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Article: Nano-scale structure and mechanical properties of the human dentine-enamel junction

TitleNano-scale structure and mechanical properties of the human dentine-enamel junction
Authors
KeywordsBiomineralization
Dentine-enamel junction
Nanomechanical testing
Transmission electron microscope
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/wps/find/journaldescription.cws_home/711005/description#description
Citation
Journal Of The Mechanical Behavior Of Biomedical Materials, 2011, v. 4 n. 5, p. 785-795 How to Cite?
AbstractDespite being an interface between two mechanically mismatched phases of the soft dentine and hard enamel, the dentine-enamel junction (DEJ) in a human tooth is in general capable of withstanding a long working life of repeated dynamic loading. The current poor understanding of the structure and properties of the DEJ has presented a major obstacle to designing better therapeutic protocols for complications concerning the DEJ. In this investigation, it was discovered that the DEJ is a thin, but gradual interface with characteristics transiting from those of dentine to those of enamel. The collagen fibres in dentine enter into the enamel side of the DEJ and terminate in a region in which the hydroxyapatite crystals begin to show enamel characteristics. Using focused ion beam machining, micro-beams were fabricated from regions within 50 μm of the DEJ and were subjected to bend tests. In spite of the similarity in the flexural strength of the DEJ and enamel, fractographs revealed cracks in the DEJ that propagated along structures with dentine characteristics. To the best of our knowledge, this is the first report on the testing of the mechanical properties of the DEJ. © 2010 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/139361
ISSN
2014 Impact Factor: 3.417
2014 SCImago Journal Rankings: 0.999
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, YLen_HK
dc.contributor.authorNgan, AHWen_HK
dc.contributor.authorKing, NMen_HK
dc.date.accessioned2011-09-23T05:48:50Z-
dc.date.available2011-09-23T05:48:50Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of The Mechanical Behavior Of Biomedical Materials, 2011, v. 4 n. 5, p. 785-795en_HK
dc.identifier.issn1751-6161en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139361-
dc.description.abstractDespite being an interface between two mechanically mismatched phases of the soft dentine and hard enamel, the dentine-enamel junction (DEJ) in a human tooth is in general capable of withstanding a long working life of repeated dynamic loading. The current poor understanding of the structure and properties of the DEJ has presented a major obstacle to designing better therapeutic protocols for complications concerning the DEJ. In this investigation, it was discovered that the DEJ is a thin, but gradual interface with characteristics transiting from those of dentine to those of enamel. The collagen fibres in dentine enter into the enamel side of the DEJ and terminate in a region in which the hydroxyapatite crystals begin to show enamel characteristics. Using focused ion beam machining, micro-beams were fabricated from regions within 50 μm of the DEJ and were subjected to bend tests. In spite of the similarity in the flexural strength of the DEJ and enamel, fractographs revealed cracks in the DEJ that propagated along structures with dentine characteristics. To the best of our knowledge, this is the first report on the testing of the mechanical properties of the DEJ. © 2010 Elsevier Ltd.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/wps/find/journaldescription.cws_home/711005/description#descriptionen_HK
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materialsen_HK
dc.subjectBiomineralizationen_HK
dc.subjectDentine-enamel junctionen_HK
dc.subjectNanomechanical testingen_HK
dc.subjectTransmission electron microscopeen_HK
dc.subject.meshBiomechanicsen_HK
dc.subject.meshDental Enamel - chemistryen_HK
dc.subject.meshDentin - chemistryen_HK
dc.subject.meshElastic Modulusen_HK
dc.subject.meshHardnessen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMechanical Processesen_HK
dc.subject.meshNanostructures - chemistryen_HK
dc.titleNano-scale structure and mechanical properties of the human dentine-enamel junctionen_HK
dc.typeArticleen_HK
dc.identifier.emailNgan, AHW: hwngan@hkucc.hku.hken_HK
dc.identifier.emailKing, NM: hhdbknm@hkucc.hku.hken_HK
dc.identifier.authorityNgan, AHW=rp00225en_HK
dc.identifier.authorityKing, NM=rp00006en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jmbbm.2010.09.003en_HK
dc.identifier.pmid21565726en_HK
dc.identifier.scopuseid_2-s2.0-79955729028en_HK
dc.identifier.hkuros192469en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955729028&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume4en_HK
dc.identifier.issue5en_HK
dc.identifier.spage785en_HK
dc.identifier.epage795en_HK
dc.identifier.isiWOS:000291914800015-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridChan, YL=8250546500en_HK
dc.identifier.scopusauthoridNgan, AHW=7006827202en_HK
dc.identifier.scopusauthoridKing, NM=7201762850en_HK

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