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Article: Opacity and color changes of tooth-colored restorative materials

TitleOpacity and color changes of tooth-colored restorative materials
Authors
KeywordsChemicals And Cas Registry Numbers
Issue Date1996
PublisherOperative Dentistry. The Journal's web site is located at http://www.jopdent.org
Citation
Operative Dentistry, 1996, v. 21 n. 2, p. 73-80 How to Cite?
AbstractInternal opacity and color changes of several esthetic direct restorative materials were determined using an accelerated test proposed by Asmussen (1981). Five chemically cured composites, seven light-cured composites, and three resin-modified glass-ionomer cements were placed in acrylic rings. After curing, they were left at 37°C for 1 week before baseline measurement, and then stored in 60°C distilled water up to 4 weeks. Color change was determined by a color analyzer, and contrast ratio representing opacity was calculated. All chemically cured composites tested discolored to dark yellow or dark brown after 4 weeks. Opacity decreased for two macrofilled composites. Light-cured composites discolored slightly, but their opacity change was negligible. All resin-modified glass-ionomer cements tested showed an abrupt decrease of opacity at the initial stage, accompanying darkening of the materials. Opacity decrease was found to be a factor of discoloration for some tooth-colored restorative materials, might be caused by a refractive index change of the matrix phase of the materials. ©Operative Dentistry, 1996.
Persistent Identifierhttp://hdl.handle.net/10722/90644
ISSN
2015 Impact Factor: 2.819
2015 SCImago Journal Rankings: 0.641
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorInokoshi, Sen_HK
dc.contributor.authorBurrow, MFen_HK
dc.contributor.authorKataumi, Men_HK
dc.contributor.authorYamada, Ten_HK
dc.contributor.authorTakatsu, Ten_HK
dc.date.accessioned2010-09-17T10:06:09Z-
dc.date.available2010-09-17T10:06:09Z-
dc.date.issued1996en_HK
dc.identifier.citationOperative Dentistry, 1996, v. 21 n. 2, p. 73-80en_HK
dc.identifier.issn0361-7734en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90644-
dc.description.abstractInternal opacity and color changes of several esthetic direct restorative materials were determined using an accelerated test proposed by Asmussen (1981). Five chemically cured composites, seven light-cured composites, and three resin-modified glass-ionomer cements were placed in acrylic rings. After curing, they were left at 37°C for 1 week before baseline measurement, and then stored in 60°C distilled water up to 4 weeks. Color change was determined by a color analyzer, and contrast ratio representing opacity was calculated. All chemically cured composites tested discolored to dark yellow or dark brown after 4 weeks. Opacity decreased for two macrofilled composites. Light-cured composites discolored slightly, but their opacity change was negligible. All resin-modified glass-ionomer cements tested showed an abrupt decrease of opacity at the initial stage, accompanying darkening of the materials. Opacity decrease was found to be a factor of discoloration for some tooth-colored restorative materials, might be caused by a refractive index change of the matrix phase of the materials. ©Operative Dentistry, 1996.en_HK
dc.languageengen_HK
dc.publisherOperative Dentistry. The Journal's web site is located at http://www.jopdent.orgen_HK
dc.relation.ispartofOperative Dentistryen_HK
dc.subjectChemicals And Cas Registry Numbersen_HK
dc.subject.meshAnalysis of Varianceen_HK
dc.subject.meshColoren_HK
dc.subject.meshComposite Resins - chemistryen_HK
dc.subject.meshGlass Ionomer Cements - chemistryen_HK
dc.subject.meshLighten_HK
dc.subject.meshOptics and Photonicsen_HK
dc.subject.meshPolymers - chemistryen_HK
dc.subject.meshProsthesis Coloringen_HK
dc.subject.meshResin Cements - chemistryen_HK
dc.titleOpacity and color changes of tooth-colored restorative materialsen_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.pmid8957922-
dc.identifier.scopuseid_2-s2.0-0030090114en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030090114&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue2en_HK
dc.identifier.spage73en_HK
dc.identifier.epage80en_HK
dc.identifier.isiWOS:A1996UA32100008-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridInokoshi, S=7004592633en_HK
dc.identifier.scopusauthoridBurrow, MF=7005876730en_HK
dc.identifier.scopusauthoridKataumi, M=8941670500en_HK
dc.identifier.scopusauthoridYamada, T=8941670900en_HK
dc.identifier.scopusauthoridTakatsu, T=35993686200en_HK

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