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Light transmittance of zirconia as a function of thickness and microhardness of resin cements under different thicknesses of zirconia

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Light transmittance of zirconia as a function of thickness and microhardness of resin cements under different thicknesses of zirconia

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dc.contributor.author Cekic Nagas, Isil es
dc.contributor.author Egilmez, Ferhan es
dc.contributor.author Ergün, Gülfem es
dc.contributor.author Kaya, Bekir-Murat es
dc.date.accessioned 2014-05-29T07:05:03Z
dc.date.available 2014-05-29T07:05:03Z
dc.date.issued 2013 es
dc.identifier.citation Cekic Nagas, Isil ; Egilmez, Ferhan ; Ergün, Gülfem ; Kaya, Bekir-Murat. Light transmittance of zirconia as a function of thickness and microhardness of resin cements under different thicknesses of zirconia. En: Medicina oral, patología oral y cirugía bucal. Ed inglesa, 2013, Vol. 18, No. 2: 212-218 es
dc.identifier.uri http://hdl.handle.net/10550/35602
dc.description.abstract Objective: The objective of this study was to compare microhardness of resin cements under different thicknesses of zirconia and the light transmittance of zirconia as a function of thickness. Study design: A total of 126 disc-shaped specimens (2 mm in height and 5 mm in diameter) were prepared from dual-cured resin cements (RelyX Unicem, Panavia F and Clearfil SA cement). Photoactivation was performed by using quartz tungsten halogen and light emitting diode light curing units under different thicknesses of zirconia. Then the specimens (n=7/per group) were stored in dry conditions in total dark at 37°C for 24 h. The Vicker's hardness test was performed on the resin cement layer with a microhardness tester. Statistical significance was determined using multifactorial analysis of variance (ANOVA) (alpha=.05). Light transmittance of different thick - nesses of zirconia (0.3, 0.5 and 0.8 mm) was measured using a hand-held radiometer (Demetron, Kerr). Data were analyzed using one-way ANOVA test (alpha=.05). Results: ANOVA revealed that resin cement and light curing unit had significant effects on microhardness (p < 0.001). Additionally, greater zirconia thickness resulted in lower transmittance. There was no correlation between the amount of light transmitted and microhardness of dual-cured resin cements (r = 0.073, p = 0.295). Conclusion: Although different zirconia thicknesses might result in insufficient light transmission, dual-cured resin cements under zirconia restorations could have adequate microhardness en_US
dc.subject Odontología es
dc.subject Ciencias de la salud es
dc.title Light transmittance of zirconia as a function of thickness and microhardness of resin cements under different thicknesses of zirconia es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.type.hasVersion VoR es_ES

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