scholarly journals Effect of light curing protocol on the degree of conversion of a light cured resin cement

2018 ◽  
Vol 64 (1) ◽  
pp. 657-663
Author(s):  
Ahmed Sabet ◽  
Kamal Ebeid
Keyword(s):  
Degree Of Conversion ◽  
Resin Cement ◽  
Light Curing ◽  
Effect Of Light

Effect of LED Light-Curing Spectral Emission Profile on Light-Cured Resin Cement Degree of Conversion

2020 ◽  
Author(s):  
RQ Ramos ◽  
RR Moraes ◽  
GC Lopes
Keyword(s):  
Clinical Relevance ◽  
Degree Of Conversion ◽  
Resin Cement ◽  
Light Activation ◽  
Spectral Emission ◽  
Led Light ◽  
Emission Profile ◽  
Light Curing

Clinical Relevance The use of multipeak LED light-curing guarantees efficiency on light activation of Ivocerin-containing light-cured resin cement.

Effect of Irradiance and Exposure Duration on Temperature and Degree of Conversion of Dual-Cure Resin Cement for Ceramic Restorations

2018 ◽  
Vol 43 (6) ◽  
pp. E280-E287 ◽  
Author(s):  
JS Shim ◽  
SH Han ◽  
N Jha ◽  
ST Hwang ◽  
W Ahn ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Exposure Duration ◽  
Near Infrared ◽  
Degree Of Conversion ◽  
Resin Cement ◽  
Resin Cements ◽  
Digital Thermometer ◽  
Light Curing ◽  
Ceramic Restorations

SUMMARY This study investigated the effects of irradiance and exposure duration on dual-cured resin cements irradiated through ceramic restorative materials. A single light-curing unit was calibrated to three different irradiances (500, 1000, and 1500 mW/cm2) and irradiated to three different attenuating materials (transparent acryl, lithium disilicate, zirconia) with 1-mm thicknesses for 20 or 60 seconds. The changes in irradiance and temperature were measured with a radiometer (or digital thermometer) under the attenuating materials. The degree of conversion (DC) of dual-cure resin cement after irradiation at different irradiances and exposure durations was measured with Fourier transform near infrared spectroscopy. Two-way analysis of variance revealed that irradiance (p<0.001) and exposure duration (p<0.001) significantly affected temperature and DC. All groups showed higher DCs with increased exposure times (p<0.05), but there were no statistically significant differences between the groups irradiated with 1000 mW/cm2 and 1500 mW/cm2 (p>0.05). Higher-intensity irradiances yielded higher temperatures (p<0.05), but exposure time did not affect temperature when materials were irradiated at 500 mW/cm2 (p>0.05).

Effect of Light-Curing Method and Cement Activation Mode on Resin Cement Knoop Hardness

2007 ◽  
Vol 16 (6) ◽  
pp. 480-484 ◽  
Author(s):  
Rubens Nisie Tango ◽  
Mário Alexandre Coelho Sinhoreti ◽  
Américo Bortolazzo Correr ◽  
Lourenço Correr-Sobrinho ◽  
Guilherme Elias Peçanha Henriques
Keyword(s):  
Knoop Hardness ◽  
Resin Cement ◽  
Light Curing ◽  
Curing Method ◽  
Effect Of Light

Effect of Light Energy Density on Conversion Degree and Hardness of Dual-cured Resin Cement

2010 ◽  
Vol 35 (1) ◽  
pp. 120-124 ◽  
Author(s):  
P. C. P. Komori ◽  
A. B. Paula ◽  
A. A. Martin ◽  
R. N. Tango ◽  
M. A. C. Sinhoreti ◽  
...  
Keyword(s):  
Energy Density ◽  
Physical Properties ◽  
Clinical Relevance ◽  
Light Energy ◽  
Resin Cement ◽  
Conversion Degree ◽  
Light Curing ◽  
Effect Of Light

Clinical Relevance Light energy density can influence the curing of dual-cured resin cement. The ultimate physical properties of dual-cured resin cement depend on light energy delivered from the light-curing unit. It can guide the clinicians to select the appropriate curing unit for curing dual cement.

scholarly journals Effect of light-curing units, post-cured time and shade of resin cement on knoop hardness

2009 ◽  
Vol 20 (5) ◽  
pp. 410-413 ◽  
Author(s):  
Rogério Vieira Reges ◽  
Ana Rosa Costa ◽  
Américo Bortolazzo Correr ◽  
Evandro Piva ◽  
Regina Maria Puppin-Rontani ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Knoop Hardness ◽  
Resin Cement ◽  
Light Emitting ◽  
Ceramic Disc ◽  
Quartz Tungsten Halogen ◽  
Cure Time ◽  
Light Curing ◽  
Effect Of Light ◽  
Made In

The aim of this study was to evaluate the Knoop hardness after 15 min and 24 h of different shades of a dual-cured resin-based cement after indirect photoactivation (ceramic restoration) with 2 light-curing units (LCUs). The resin cement Variolink II (Ivoclar Vivadent) shade XL, A2, A3 and opaque were mixed with the catalyst paste and inserted into a black Teflon mold (5 mm diameter x 1 mm high). A transparent strip was placed over the mold and a ceramic disc (Duceram Plus, shade A3) was positioned over the resin cement. Light-activation was performed through the ceramic for 40 s using quartz-tungsten-halogen (QTH) (XL 2500; 3M ESPE) or light-emitting diode (LED) (Ultrablue Is, DMC) LCUs with power density of 615 and 610 mW/cm2, respectively. The Koop hardness was measured using a microhardness tester HMV 2 (Shimadzu) after 15 min or 24 h. Four indentations were made in each specimen. Data were subjected to ANOVA and Tukey's test (a=0.05). The QTH LCU provided significantly higher (p<0.05) KHN values than the LED LCU. When the post-cure times were compared for the same shade, QTH and LED at 24 h provided significantly higher (p<0.05) KHN values than at 15 min. It may be concluded that the Knoop hardness was generally dependent on the LCU and post-cure time. The opaque shade of the resin cement showed lower Knoop hardness than the other shades for both LCUs and post-cure times.

scholarly journals Degree of Conversion and Mechanical Properties of Resin Cements Cured Through Different All-Ceramic Systems

2015 ◽  
Vol 26 (5) ◽  
pp. 484-489 ◽  
Author(s):  
Camila de Carvalho Almança Lopes ◽  
Renata Borges Rodrigues ◽  
André Luis Faria e Silva ◽  
Paulo Cézar Simamoto Júnior ◽  
Carlos José Soares ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Indentation Test ◽  
Degree Of Conversion ◽  
Resin Cement ◽  
Resin Cements ◽  
Mean Values ◽  
Halogen Light ◽  
All Ceramic ◽  
Light Curing ◽  
Better Than

Abstract: The aim of this study was to verify the degree of conversion (DC), Vickers microhardness (VH) and elastic modulus (E) of resin cements cured through different ceramic systems. One 1.5-mm-thick disc of each ceramic system (feldspathic, lithium dissilicate and zircônia veneered with feldspathic) was used. Three dual-cured (Allcem, Variolink II and RelyX U200) and one chemically-cured (Multilink) resin cements were activated through ceramic discs. For dual-cured resin cements was used a conventional halogen light-curing unit (Optilux 501 at 650 mW/cm2 for 120 s). Samples cured without the ceramic disc were used as control. The samples were stored at 37 °C for 24 h. ATR/FTIR spectrometry was used to evaluate the extent of polymerization in the samples (n=5). Micromechanical properties - VH and E - of the resin cements (n=5) were measured with a dynamic indentation test. Data were statistically analyzed with two-way ANOVA, Tukey's test and Pearson's correlation (α=0.05). DC was affected only by the type of resin cement (p=0.001). For VH, significant interaction was detected between resin cement and ceramic (p=0.045). The dual-cured resin cements showed no significant differences in mean values for E and significantly higher values than the chemically-cured resin cement. The degree of conversion and the mechanical properties of the evaluated resin cements depend on their activation mode and the type of ceramics used in 1.5 mm thickness. The dual-cured resin cements performed better than the chemically-cured resin cement in all studied properties.

Effect of light curing protocol on degree of conversion of composites

2014 ◽  
Vol 72 (8) ◽  
pp. 898-902 ◽  
Author(s):  
Anderson Catelan ◽  
Maria do Carmo Aguiar Jordão Mainardi ◽  
Giulliana Panfiglio Soares ◽  
Adriano Fonseca de Lima ◽  
Gláucia Maria Bovi Ambrosano ◽  
...  
Keyword(s):  
Degree Of Conversion ◽  
Light Curing ◽  
Effect Of Light

scholarly journals Effect of light-curing method and indirect veneering materials on the Knoop hardness of a resin cement

2009 ◽  
Vol 23 (2) ◽  
pp. 108-112 ◽  
Author(s):  
Nelson Tetsu Iriyama ◽  
Rubens Nisie Tango ◽  
Izabella Paola Manetta ◽  
Mário Alexandre Coelho Sinhoreti ◽  
Lourenço Correr Sobrinho ◽  
...  
Keyword(s):  
Knoop Hardness ◽  
Resin Cement ◽  
Light Curing ◽  
Curing Method ◽  
Effect Of Light

scholarly journals The effect of light curing units, curing time, and veneering materials on resin cement microhardness

2013 ◽  
Vol 8 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Nurcan Ozakar Ilday ◽  
Yusuf Ziya Bayindir ◽  
Funda Bayindir ◽  
Aysel Gurpinar
Keyword(s):  
Resin Cement ◽  
Curing Time ◽  
Light Curing ◽  
Effect Of Light
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