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Article: Effects of resin hydrophilicity on water sorption and changes in modulus of elasticity

TitleEffects of resin hydrophilicity on water sorption and changes in modulus of elasticity
Authors
Issue Date2005
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biomaterials
Citation
Biomaterials, 2005, v. 26 n. 33, p. 6449-6459 How to Cite?
AbstractAs acidic monomers of self-etching adhesives are incorporated into dental adhesives at high concentrations, the adhesive becomes more hydrophilic. Water sorption by polymers causes plasticization and lowers mechanical properties. The purpose of this study was to compare the water sorption and modulus of elasticity (E) of five experimental neat resins (EX) of increasing hydrophilicity, as ranked by their Hoy's solubility parameters and five commercial resins. Methods: After measuring the initial modulus of all resin disks by biaxial flexure, half the specimens were stored in hexadecane and the rest were stored in water. Repeated measurements of stiffness were made for 3 days. Water sorption and solubility measurements were made in a parallel experiment. Results: None of the specimens stored in oil showed any significant decrease in modulus. All resins stored in water exhibited a time-dependent decrease in modulus that was proportional to their degree of water sorption. Water sorption of EX was proportional to Hoy's solubility parameter for polar forces (δp) with increasing polarity resulting in higher sorption. The least hydrophilic resin absorbed 0.55 wt% water and showed a 15% decrease in modulus after 3 days. The most hydrophilic experimental resin absorbed 12.8 wt% water and showed a 73% modulus decrease during the same period. The commercial resins absorbed between 5% and 12% water that was associated with a 19-42% reduction in modulus over 3 days. © 2005 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/65997
ISSN
2015 Impact Factor: 8.387
2015 SCImago Journal Rankings: 3.565
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorIto, Sen_HK
dc.contributor.authorHashimoto, Men_HK
dc.contributor.authorWadgaonkar, Ben_HK
dc.contributor.authorSvizero, Nen_HK
dc.contributor.authorCarvalho, RMen_HK
dc.contributor.authorYiu, Cen_HK
dc.contributor.authorRueggeberg, FAen_HK
dc.contributor.authorFoulger, Sen_HK
dc.contributor.authorSaito, Ten_HK
dc.contributor.authorNishitani, Yen_HK
dc.contributor.authorYoshiyama, Men_HK
dc.contributor.authorTay, FRen_HK
dc.contributor.authorPashley, DHen_HK
dc.date.accessioned2010-09-06T05:42:44Z-
dc.date.available2010-09-06T05:42:44Z-
dc.date.issued2005en_HK
dc.identifier.citationBiomaterials, 2005, v. 26 n. 33, p. 6449-6459en_HK
dc.identifier.issn0142-9612en_HK
dc.identifier.urihttp://hdl.handle.net/10722/65997-
dc.description.abstractAs acidic monomers of self-etching adhesives are incorporated into dental adhesives at high concentrations, the adhesive becomes more hydrophilic. Water sorption by polymers causes plasticization and lowers mechanical properties. The purpose of this study was to compare the water sorption and modulus of elasticity (E) of five experimental neat resins (EX) of increasing hydrophilicity, as ranked by their Hoy's solubility parameters and five commercial resins. Methods: After measuring the initial modulus of all resin disks by biaxial flexure, half the specimens were stored in hexadecane and the rest were stored in water. Repeated measurements of stiffness were made for 3 days. Water sorption and solubility measurements were made in a parallel experiment. Results: None of the specimens stored in oil showed any significant decrease in modulus. All resins stored in water exhibited a time-dependent decrease in modulus that was proportional to their degree of water sorption. Water sorption of EX was proportional to Hoy's solubility parameter for polar forces (δp) with increasing polarity resulting in higher sorption. The least hydrophilic resin absorbed 0.55 wt% water and showed a 15% decrease in modulus after 3 days. The most hydrophilic experimental resin absorbed 12.8 wt% water and showed a 73% modulus decrease during the same period. The commercial resins absorbed between 5% and 12% water that was associated with a 19-42% reduction in modulus over 3 days. © 2005 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biomaterialsen_HK
dc.relation.ispartofBiomaterialsen_HK
dc.rightsBiomaterials. Copyright © Elsevier BV.en_HK
dc.subject.meshAbsorptionen_HK
dc.subject.meshAlkanes - chemistryen_HK
dc.subject.meshAnalysis of Varianceen_HK
dc.subject.meshBiocompatible Materialsen_HK
dc.subject.meshComposite Resinsen_HK
dc.subject.meshDental Cements - chemistryen_HK
dc.subject.meshElasticityen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMethacrylates - chemistryen_HK
dc.subject.meshMicroscopy, Electron, Transmissionen_HK
dc.subject.meshModels, Chemicalen_HK
dc.subject.meshOilsen_HK
dc.subject.meshPhenols - chemistryen_HK
dc.subject.meshResin Cementsen_HK
dc.subject.meshResins, Synthetic - chemistryen_HK
dc.subject.meshSolubilityen_HK
dc.subject.meshTensile Strengthen_HK
dc.subject.meshTime Factorsen_HK
dc.subject.meshTissue Adhesionsen_HK
dc.subject.meshWater - chemistryen_HK
dc.titleEffects of resin hydrophilicity on water sorption and changes in modulus of elasticityen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0142-9612&volume=26&spage=6449&epage=6459&date=2005&atitle=Effects+of+resin+hydrophilicity+on+water+sorption+and+changes+in+modulus+of+elasticityen_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/j.biomaterials.2005.04.052en_HK
dc.identifier.pmid15949841-
dc.identifier.scopuseid_2-s2.0-22544463664en_HK
dc.identifier.hkuros102364en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-22544463664&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue33en_HK
dc.identifier.spage6449en_HK
dc.identifier.epage6459en_HK
dc.identifier.isiWOS:000231189800005-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridIto, S=35414429700en_HK
dc.identifier.scopusauthoridHashimoto, M=35380578400en_HK
dc.identifier.scopusauthoridWadgaonkar, B=8602590200en_HK
dc.identifier.scopusauthoridSvizero, N=8602590300en_HK
dc.identifier.scopusauthoridCarvalho, RM=7103357029en_HK
dc.identifier.scopusauthoridYiu, C=7007115156en_HK
dc.identifier.scopusauthoridRueggeberg, FA=35450189900en_HK
dc.identifier.scopusauthoridFoulger, S=7004888082en_HK
dc.identifier.scopusauthoridSaito, T=36063820300en_HK
dc.identifier.scopusauthoridNishitani, Y=7005012678en_HK
dc.identifier.scopusauthoridYoshiyama, M=7101976652en_HK
dc.identifier.scopusauthoridTay, FR=7102091962en_HK
dc.identifier.scopusauthoridPashley, DH=35448600800en_HK

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