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Article: The effect of ytterbium fluoride and barium sulphate nanoparticles on the reactivity and strength of a glass-ionomer cement

TitleThe effect of ytterbium fluoride and barium sulphate nanoparticles on the reactivity and strength of a glass-ionomer cement
Authors
KeywordsChemicals And Cas Registry Numbers
Issue Date2006
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
Citation
Dental Materials, 2006, v. 22 n. 8, p. 746-751 How to Cite?
AbstractObjectives: While clinical advantages of glass-ionomers include fluoride release and radiopacity, disadvantages include low strength, slow initial setting times and opacity. The addition of nanoparticles, in particular those containing fluoride and cross-linkable ions, may mitigate the disadvantages while further improving the advantages. This investigation evaluated the effects of the addition of ytterbium fluoride (YbF3) and barium sulphate (BaSO4) on the strength and reactivity of a commercial glass-ionomer cement. Methods: YbF3 and BaSO4 nanoparticles were incorporated into the powder component of Riva SC (SDI Ltd., Bayswater, Australia) at 1, 2, 5, 10, 15, and 25% by weight. Capsules were assembled at a powder:liquid ratio of 2.9:1, activated and mixed, and the resultant pastes evaluated for working time, initial setting time, 24-h surface hardness and 24-h compressive strength. Results: Working and initial setting times were reduced with the addition of YbF3. Addition of BaSO4 at low concentrations reduced working and initial setting times, but further addition delayed the setting reaction. Compressive strength decreased with the addition of either YbF3 or BaSO4, while surface hardness was slightly but insignificantly higher at 1-2% nanoparticles and then decreased with increasing nanoparticle concentrations. Significance: Nanoparticles modified the setting characteristics, strength and surface hardness of a commercial glass-ionomer cement, and may be useful for refining the handling characteristics of these materials. Further improvements in powder blending may result in more significant improvements in mechanical properties. © 2005 Academy of Dental Materials.
Persistent Identifierhttp://hdl.handle.net/10722/90722
ISSN
2015 Impact Factor: 3.931
2015 SCImago Journal Rankings: 1.339
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPrentice, LHen_HK
dc.contributor.authorTyas, MJen_HK
dc.contributor.authorBurrow, MFen_HK
dc.date.accessioned2010-09-17T10:07:19Z-
dc.date.available2010-09-17T10:07:19Z-
dc.date.issued2006en_HK
dc.identifier.citationDental Materials, 2006, v. 22 n. 8, p. 746-751en_HK
dc.identifier.issn0109-5641en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90722-
dc.description.abstractObjectives: While clinical advantages of glass-ionomers include fluoride release and radiopacity, disadvantages include low strength, slow initial setting times and opacity. The addition of nanoparticles, in particular those containing fluoride and cross-linkable ions, may mitigate the disadvantages while further improving the advantages. This investigation evaluated the effects of the addition of ytterbium fluoride (YbF3) and barium sulphate (BaSO4) on the strength and reactivity of a commercial glass-ionomer cement. Methods: YbF3 and BaSO4 nanoparticles were incorporated into the powder component of Riva SC (SDI Ltd., Bayswater, Australia) at 1, 2, 5, 10, 15, and 25% by weight. Capsules were assembled at a powder:liquid ratio of 2.9:1, activated and mixed, and the resultant pastes evaluated for working time, initial setting time, 24-h surface hardness and 24-h compressive strength. Results: Working and initial setting times were reduced with the addition of YbF3. Addition of BaSO4 at low concentrations reduced working and initial setting times, but further addition delayed the setting reaction. Compressive strength decreased with the addition of either YbF3 or BaSO4, while surface hardness was slightly but insignificantly higher at 1-2% nanoparticles and then decreased with increasing nanoparticle concentrations. Significance: Nanoparticles modified the setting characteristics, strength and surface hardness of a commercial glass-ionomer cement, and may be useful for refining the handling characteristics of these materials. Further improvements in powder blending may result in more significant improvements in mechanical properties. © 2005 Academy of Dental Materials.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dentalen_HK
dc.relation.ispartofDental Materialsen_HK
dc.subjectChemicals And Cas Registry Numbersen_HK
dc.subject.meshBarium Sulfate - chemistryen_HK
dc.subject.meshCariostatic Agents - chemistryen_HK
dc.subject.meshCompressive Strengthen_HK
dc.subject.meshContrast Media - chemistryen_HK
dc.subject.meshDental Materials - chemistryen_HK
dc.subject.meshFluorides - chemistryen_HK
dc.subject.meshGlass Ionomer Cements - chemistryen_HK
dc.subject.meshHardnessen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMicroscopy, Electron, Transmissionen_HK
dc.subject.meshNanostructures - chemistryen_HK
dc.subject.meshPowdersen_HK
dc.subject.meshStress, Mechanicalen_HK
dc.subject.meshSurface Propertiesen_HK
dc.subject.meshTime Factorsen_HK
dc.subject.meshViscosityen_HK
dc.subject.meshYtterbium - chemistryen_HK
dc.titleThe effect of ytterbium fluoride and barium sulphate nanoparticles on the reactivity and strength of a glass-ionomer cementen_HK
dc.typeArticleen_HK
dc.identifier.emailBurrow, MF:mfburr58@hku.hken_HK
dc.identifier.authorityBurrow, MF=rp01306en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.dental.2005.11.001en_HK
dc.identifier.pmid16364424-
dc.identifier.scopuseid_2-s2.0-33745714007en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745714007&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue8en_HK
dc.identifier.spage746en_HK
dc.identifier.epage751en_HK
dc.identifier.isiWOS:000239532400006-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridPrentice, LH=8656056400en_HK
dc.identifier.scopusauthoridTyas, MJ=7006088443en_HK
dc.identifier.scopusauthoridBurrow, MF=7005876730en_HK

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