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dc.contributor.authorYiu, CKY
dc.contributor.authorTay, FR
dc.contributor.authorPashley, DH
dc.contributor.authorKing, NM
dc.contributor.authorSuh, BI
dc.contributor.authorItthagarun, A
dc.date.accessioned2017-05-03T15:18:47Z
dc.date.available2017-05-03T15:18:47Z
dc.date.issued2005
dc.identifier.issn0894-8275
dc.identifier.urihttp://hdl.handle.net/10072/18430
dc.description.abstractPURPOSE: To evaluate, by transmission electron microscopy, the extent of silver nitrate penetration into four polymerized resin blends with increasing degree of hydrophilicity after a period of 24 hours. METHODS: The uncured resin was polymerized in an experimental composite inlay processing chamber under a pressurized nitrogen atmosphere maintained at 551.6 KPa and light-activated for one complete cycle at 125 degrees C for 10 minutes. The resin blocks were sectioned occluso-gingivally into multiple 0.9 x 0.9 x 5 mm resin beams, and immersed in 50% basic, ammoniacal silver nitrate for 24 hours, exposed to a photodeveloping solution and prepared for transmission electron microscopy. The percentage distributions of silver deposits were compared using Kruskal-Wallis one-way analysis of variance (ANOVA) on ranks and Dunn's multiple comparison tests. RESULTS: No silver uptake occurred in the two most hydrophobic resins (Groups 1 & 2). The percentage distributions of silver deposits in the more hydrophilic Group 3 (6.23 +/- 1.35%) and 4 (5.08 +/- 1.09%) resins were significantly higher (P < 0.05) than were found in the more hydrophobic resins but Groups 3 and 4 were not significantly different from each other. The intensity of silver uptake increased with hydrophilicity of the resin blends. TEM examination revealed two types of silver deposits: fine spotted-type silver grains, and islands of interconnecting electron-dense clusters of silver grains. Phase separation of resin components was observed in Group 4 resin blends.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_US
dc.publisherMosher & Linder, Inc.,
dc.publisher.placeUnited States
dc.publisher.urihttp://www.amjdent.com/Archive/2005/August and June 2005 Issues.html
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom160
dc.relation.ispartofpageto164
dc.relation.ispartofjournalAmerican Journal of Dentistry
dc.relation.ispartofvolume18
dc.rights.retentionY
dc.subject.fieldofresearchDentistry
dc.subject.fieldofresearchcode1105
dc.titleEffect of resin hydrophilicity on tracer penetration. A preliminary study
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2015-02-04T04:26:09Z
gro.hasfulltextNo Full Text
gro.griffith.authorItthagarun, Anut


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