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Article: Ultrastructural study of a glass ionomer-based, all-in-one adhesive

TitleUltrastructural study of a glass ionomer-based, all-in-one adhesive
Authors
Issue Date2001
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdent
Citation
Journal Of Dentistry, 2001, v. 29 n. 7, p. 489 How to Cite?
AbstractObjective: Reactmer Bond (Shofu Inc., Kyoto, Japan) is a glass ionomer (GI) based, tri-curable, all-in-one, filled adhesive. Both fluoroaluminosilicate glass (FASG) and fully pre-reacted glass (F-PRG) are used as fillers. This study examined the ultrastructure and elemental composition of resin-dentine interfaces that were treated with this adhesive. Methods: Dentine disks prepared from human third molars were abraded with either 600- or 60-grit SiC paper to create smear layers of different thickness. They were bonded using Reactmer Bond. Cryo-fractured dentine surfaces devoid of smear layers were also bonded by chemical-activation and GI reaction without additional light-activation, or allowing the GI reaction to proceed for l min before the adhesive was applied and light-activated. Undemineralised and demineralised sections were processed for TEM examination and STEM/EDX analysis. Results: Resin-dentine interface from specimens with smear layers consisted of a mineral-dense surface layer that resided on top of a partially demineralised dentine. The partially demineralised zone was considerably thicker in the 600-grit than the 60-grit specimens. In smear layer-free specimens that were cured by chemical-activation/GI modes only, the surface layer concurred with the partially demineralised zone, and appeared as an electron-dense layer over the undemineralised intact dentine. Smear layer-free specimens that were cured by the light-activation of the partially neutralised adhesive contained incomplete amorphous surface layers only. Apart from colloidal silica, FASG fillers were the predominant filler type within the resin matrices. Peripheral hydrogel layers that contained electron-dense 'seeds' were found around the FASG fillers. F-PRG fillers were only sparsely observed. In specimens that were laboratory demineralised with formic acid, phase separation of the unstained resin matrices into electron-dense and electron-lucent domains occurred. Artefactual dendritic deposits were found within the electron-dense domains. Conclusions: The presence of a surface interaction layer on top of a partially demineralised zone along the resin-dentine interface suggests that either a GI-type reaction or precipitation of insoluble carboxylate salts around remnant apatite crystallites may occur when this single-step adhesive interacts with dentine. Appearance of artefactual dendritic deposits suggests that continuous ion movement is possible within the hydrophilic portion of the resin matrix in this fluoride-releasing adhesive. © 2001 Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/66673
ISSN
2014 Impact Factor: 2.749
2013 SCImago Journal Rankings: 1.159
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTay, FRen_HK
dc.contributor.authorSano, Hen_HK
dc.contributor.authorTagami, Jen_HK
dc.contributor.authorHashimoto, Men_HK
dc.contributor.authorMoulding, KMen_HK
dc.contributor.authorYiu, Cen_HK
dc.contributor.authorPashley, DHen_HK
dc.date.accessioned2010-09-06T05:48:21Z-
dc.date.available2010-09-06T05:48:21Z-
dc.date.issued2001en_HK
dc.identifier.citationJournal Of Dentistry, 2001, v. 29 n. 7, p. 489en_HK
dc.identifier.issn0300-5712en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66673-
dc.description.abstractObjective: Reactmer Bond (Shofu Inc., Kyoto, Japan) is a glass ionomer (GI) based, tri-curable, all-in-one, filled adhesive. Both fluoroaluminosilicate glass (FASG) and fully pre-reacted glass (F-PRG) are used as fillers. This study examined the ultrastructure and elemental composition of resin-dentine interfaces that were treated with this adhesive. Methods: Dentine disks prepared from human third molars were abraded with either 600- or 60-grit SiC paper to create smear layers of different thickness. They were bonded using Reactmer Bond. Cryo-fractured dentine surfaces devoid of smear layers were also bonded by chemical-activation and GI reaction without additional light-activation, or allowing the GI reaction to proceed for l min before the adhesive was applied and light-activated. Undemineralised and demineralised sections were processed for TEM examination and STEM/EDX analysis. Results: Resin-dentine interface from specimens with smear layers consisted of a mineral-dense surface layer that resided on top of a partially demineralised dentine. The partially demineralised zone was considerably thicker in the 600-grit than the 60-grit specimens. In smear layer-free specimens that were cured by chemical-activation/GI modes only, the surface layer concurred with the partially demineralised zone, and appeared as an electron-dense layer over the undemineralised intact dentine. Smear layer-free specimens that were cured by the light-activation of the partially neutralised adhesive contained incomplete amorphous surface layers only. Apart from colloidal silica, FASG fillers were the predominant filler type within the resin matrices. Peripheral hydrogel layers that contained electron-dense 'seeds' were found around the FASG fillers. F-PRG fillers were only sparsely observed. In specimens that were laboratory demineralised with formic acid, phase separation of the unstained resin matrices into electron-dense and electron-lucent domains occurred. Artefactual dendritic deposits were found within the electron-dense domains. Conclusions: The presence of a surface interaction layer on top of a partially demineralised zone along the resin-dentine interface suggests that either a GI-type reaction or precipitation of insoluble carboxylate salts around remnant apatite crystallites may occur when this single-step adhesive interacts with dentine. Appearance of artefactual dendritic deposits suggests that continuous ion movement is possible within the hydrophilic portion of the resin matrix in this fluoride-releasing adhesive. © 2001 Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jdenten_HK
dc.relation.ispartofJournal of Dentistryen_HK
dc.rightsJournal of Dentistry. Copyright © Elsevier Ltd.en_HK
dc.subject.meshAluminum Compounds - chemistryen_HK
dc.subject.meshApatites - chemistryen_HK
dc.subject.meshArtifactsen_HK
dc.subject.meshCarbon Compounds, Inorganicen_HK
dc.subject.meshCarboxylic Acids - chemistryen_HK
dc.subject.meshChemical Precipitationen_HK
dc.subject.meshDental Bondingen_HK
dc.subject.meshDentin - ultrastructureen_HK
dc.subject.meshDentin-Bonding Agents - chemistryen_HK
dc.subject.meshElectron Probe Microanalysisen_HK
dc.subject.meshFluorides - chemistryen_HK
dc.subject.meshFormic Acids - chemistryen_HK
dc.subject.meshGlass Ionomer Cements - chemistryen_HK
dc.subject.meshHumansen_HK
dc.subject.meshHydrogel - chemistryen_HK
dc.subject.meshLighten_HK
dc.subject.meshMethacrylates - chemistryen_HK
dc.subject.meshMicroscopy, Electronen_HK
dc.subject.meshMicroscopy, Electron, Scanningen_HK
dc.subject.meshPolyurethanes - chemistryen_HK
dc.subject.meshSilicon Compounds - chemistryen_HK
dc.subject.meshSilicon Dioxide - chemistryen_HK
dc.subject.meshSmear Layeren_HK
dc.subject.meshSurface Propertiesen_HK
dc.subject.meshTricarboxylic Acids - chemistryen_HK
dc.titleUltrastructural study of a glass ionomer-based, all-in-one adhesiveen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0300-5712&volume=29&spage=489&epage=498&date=2001&atitle=Ultrastructural+study+of+a+glass+ionomer-based,+all-in-one+adhesiveen_HK
dc.identifier.emailYiu, C:ckyyiu@hkucc.hku.hken_HK
dc.identifier.authorityYiu, C=rp00018en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0300-5712(01)00046-Xen_HK
dc.identifier.pmid11809327en_HK
dc.identifier.scopuseid_2-s2.0-0035468333en_HK
dc.identifier.hkuros72229en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035468333&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume29en_HK
dc.identifier.issue7en_HK
dc.identifier.spage489en_HK
dc.identifier.epage489en_HK
dc.identifier.isiWOS:000172058100005-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridTay, FR=7102091962en_HK
dc.identifier.scopusauthoridSano, H=7403159147en_HK
dc.identifier.scopusauthoridTagami, J=7005967527en_HK
dc.identifier.scopusauthoridHashimoto, M=35380578400en_HK
dc.identifier.scopusauthoridMoulding, KM=6701466356en_HK
dc.identifier.scopusauthoridYiu, C=7007115156en_HK
dc.identifier.scopusauthoridPashley, DH=35448600800en_HK

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