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Article: Nanoleakage types and potential implications: evidence from unfilled and filled adhesives with the same resin composition.

TitleNanoleakage types and potential implications: evidence from unfilled and filled adhesives with the same resin composition.
Authors
Issue Date2004
PublisherMosher & Linder, Inc. The Journal's web site is located at http://www.amjdent.com
Citation
American Journal Of Dentistry, 2004, v. 17 n. 3, p. 182-190 How to Cite?
AbstractPURPOSE: To compare nanoleakage patterns of an unfilled (OS; One-Step), a 6 wt% spherical silica-filled (OSs; One-Step Plus) and a 15 wt% glass-filled (OSg) version of a two-step, acetone-based self-priming adhesive. Permeability of bonded dentin treated with OS and OSs was also examined. METHODS: Deep, coronal dentin from extracted third molars were etched and bonded using these adhesives. One-mm thick sections were immersed in 50 wt% ammoniacal silver nitrate (pH 9.5) for 24 hours. Unstained, undemineralized sections were examined by TEM. The permeability of dentin bonded with OS and OSs were investigated at 20 cm of H2O hydrostatic pressure and compared with the osmotic conductance determined with 4.8 M CaCl2 at zero hydrostatic pressure. Composite-dentin beams bonded with OS, OSs and OSg that were fractured after microtensile bond testing were examined by SEM. RESULTS: Two types of nanoleakage patterns were recognized along the resin-dentin interfaces. The reticular type consisted of discontinuous islands of silver deposits and was exclusively seen in hybrid layers. The spotted type consisted of isolated silver grains and was evident throughout the hybrid and adhesive layers in OS. These two patterns were seen to variable extents in the two filled adhesive versions OSs and OSg and their distribution was independent of one another. OS and OSs bonded dentin were permeable to fluid filtration. However, part of this fluid movement was due to the permeability of the adhesive layer, as demonstrated by osmotic fluid conductance in the absence of hydrostatic pressure. Fractographic analysis revealed denuded collagen fibrils within fractured hybrid layers that were indicative of incomplete resin infiltration.
Persistent Identifierhttp://hdl.handle.net/10722/154520
ISSN
2015 Impact Factor: 1.194
2015 SCImago Journal Rankings: 0.443
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTay, FRen_US
dc.contributor.authorPashley, DHen_US
dc.contributor.authorYiu, Cen_US
dc.contributor.authorCheong, Cen_US
dc.contributor.authorHashimoto, Men_US
dc.contributor.authorItou, Ken_US
dc.contributor.authorYoshiyama, Men_US
dc.contributor.authorKing, NMen_US
dc.date.accessioned2012-08-08T08:25:56Z-
dc.date.available2012-08-08T08:25:56Z-
dc.date.issued2004en_US
dc.identifier.citationAmerican Journal Of Dentistry, 2004, v. 17 n. 3, p. 182-190en_US
dc.identifier.issn0894-8275en_US
dc.identifier.urihttp://hdl.handle.net/10722/154520-
dc.description.abstractPURPOSE: To compare nanoleakage patterns of an unfilled (OS; One-Step), a 6 wt% spherical silica-filled (OSs; One-Step Plus) and a 15 wt% glass-filled (OSg) version of a two-step, acetone-based self-priming adhesive. Permeability of bonded dentin treated with OS and OSs was also examined. METHODS: Deep, coronal dentin from extracted third molars were etched and bonded using these adhesives. One-mm thick sections were immersed in 50 wt% ammoniacal silver nitrate (pH 9.5) for 24 hours. Unstained, undemineralized sections were examined by TEM. The permeability of dentin bonded with OS and OSs were investigated at 20 cm of H2O hydrostatic pressure and compared with the osmotic conductance determined with 4.8 M CaCl2 at zero hydrostatic pressure. Composite-dentin beams bonded with OS, OSs and OSg that were fractured after microtensile bond testing were examined by SEM. RESULTS: Two types of nanoleakage patterns were recognized along the resin-dentin interfaces. The reticular type consisted of discontinuous islands of silver deposits and was exclusively seen in hybrid layers. The spotted type consisted of isolated silver grains and was evident throughout the hybrid and adhesive layers in OS. These two patterns were seen to variable extents in the two filled adhesive versions OSs and OSg and their distribution was independent of one another. OS and OSs bonded dentin were permeable to fluid filtration. However, part of this fluid movement was due to the permeability of the adhesive layer, as demonstrated by osmotic fluid conductance in the absence of hydrostatic pressure. Fractographic analysis revealed denuded collagen fibrils within fractured hybrid layers that were indicative of incomplete resin infiltration.en_US
dc.languageengen_US
dc.publisherMosher & Linder, Inc. The Journal's web site is located at http://www.amjdent.comen_US
dc.relation.ispartofAmerican journal of dentistryen_US
dc.subject.meshAcetone - Chemistryen_US
dc.subject.meshAcid Etching, Dentalen_US
dc.subject.meshComposite Resins - Chemistryen_US
dc.subject.meshDental Bondingen_US
dc.subject.meshDental Leakage - Classificationen_US
dc.subject.meshDentin Permeabilityen_US
dc.subject.meshDentin-Bonding Agents - Chemistryen_US
dc.subject.meshDentinal Fluid - Chemistryen_US
dc.subject.meshHumansen_US
dc.subject.meshHydrostatic Pressureen_US
dc.subject.meshMaterials Testingen_US
dc.subject.meshMethacrylates - Chemistryen_US
dc.subject.meshMicroscopy, Electronen_US
dc.subject.meshMicroscopy, Electron, Scanningen_US
dc.subject.meshNanotechnologyen_US
dc.subject.meshOsmosisen_US
dc.subject.meshPermeabilityen_US
dc.subject.meshSilicon Dioxide - Chemistryen_US
dc.subject.meshSilver Stainingen_US
dc.subject.meshTensile Strengthen_US
dc.titleNanoleakage types and potential implications: evidence from unfilled and filled adhesives with the same resin composition.en_US
dc.typeArticleen_US
dc.identifier.emailYiu, C:ckyyiu@hkucc.hku.hken_US
dc.identifier.emailCheong, C:cheongch@hkucc.hku.hken_US
dc.identifier.emailKing, NM:hhdbknm@hkucc.hku.hken_US
dc.identifier.authorityYiu, C=rp00018en_US
dc.identifier.authorityCheong, C=rp00034en_US
dc.identifier.authorityKing, NM=rp00006en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.pmid15301215-
dc.identifier.scopuseid_2-s2.0-4444344424en_US
dc.identifier.hkuros97463-
dc.identifier.volume17en_US
dc.identifier.issue3en_US
dc.identifier.spage182en_US
dc.identifier.epage190en_US
dc.identifier.isiWOS:000222698700009-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridTay, FR=7102091962en_US
dc.identifier.scopusauthoridPashley, DH=35448600800en_US
dc.identifier.scopusauthoridYiu, C=7007115156en_US
dc.identifier.scopusauthoridCheong, C=7004368071en_US
dc.identifier.scopusauthoridHashimoto, M=35380578400en_US
dc.identifier.scopusauthoridItou, K=7005976430en_US
dc.identifier.scopusauthoridYoshiyama, M=7101976652en_US
dc.identifier.scopusauthoridKing, NM=7201762850en_US

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