Change of shade by light polymerization in a resin cement polymerized beneath a ceramic restoration

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dc.contributor.authorKucukesmen, H. Cenker
dc.contributor.authorUsumez, Ashhan
dc.contributor.authorOzturk, Nilqun
dc.contributor.authorEroglu, Erdal
dc.date.accessioned2020-03-26T17:26:29Z
dc.date.available2020-03-26T17:26:29Z
dc.date.issued2008
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractObjectives: The aim of this in vitro study was to examine the effect of the color changes of a resin cement material (Variolink II) polymerized beneath a simulated ceramic restoration (IPS Empress II) by two different light polymerizing units. Methods: A conventional halogen light and a light emitting diode unit were used to polymerize resin cement with catalyst. A pressable ceramic block (10 mm in diameter, 2 or 1 mm in height) was used as an interface between the polymerizing light tip and resin cement. Colorimetric values of the specimens before and after polymerization were measured using a spectrophotometer (Easy Shade). The CIE L*a*b color system was used for the determination of the color difference. Differences between measurements were calculated as Delta E*(ab). Repeated measurements analysis of variance (ANOVA) was used to analyze the data (polymerization of resin cement, polymerizing unit and ceramic thickness) for significant differences. The Tukey HSD test and paired two-tailed tests were used to perform multiple comparisons (alpha = .05). Results: L*a*b values of ceramic system were affected by the polymerization of resin cement (before and after) (P < .01). The a* value was affected by polymerization unit (P < .05), however L* and b* values were not affected by the light polymerization unit (P > .05). The b* value was affected by ceramic thickness (1 or 2 mm) (P < .05), but L* and a* values were not affected by ceramic thickness (P > .05). The specimens polymerized beneath 1 mm ceramic thickness with conventional halogen light induced a significantly higher color changes than any other specimen (P < .05). Conclusions: The results of this in vitro study suggest that light polymerization of the resin cement (Variolink II) used in this study is an important factor for the color of the definitive restoration and should be considered during shade selection and fabrication. (C) 2007 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.jdent.2007.12.005en_US
dc.identifier.endpage223en_US
dc.identifier.issn0300-5712en_US
dc.identifier.issn1879-176Xen_US
dc.identifier.issue3en_US
dc.identifier.pmid18241969en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage219en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.jdent.2007.12.005
dc.identifier.urihttps://hdl.handle.net/20.500.12395/22243
dc.identifier.volume36en_US
dc.identifier.wosWOS:000254064000007en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherELSEVIER SCI LTDen_US
dc.relation.ispartofJOURNAL OF DENTISTRYen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectresin cementen_US
dc.subjectlight polymerizationen_US
dc.subjectcolor changeen_US
dc.titleChange of shade by light polymerization in a resin cement polymerized beneath a ceramic restorationen_US
dc.typeArticleen_US

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