scholarly journals Effect of light intensity, light-curing unit exposure time, and porcelain thickness of ips e.max press and vintage LD press on the hardness of resin cement

2020 ◽  
Vol 4 (1) ◽  
pp. 21
Author(s):  
Silvia Naliani ◽  
Suzan Elias ◽  
Rosalina Tjandrawinata
Keyword(s):  
Light Intensity ◽  
Exposure Time ◽  
Resin Cement ◽  
Light Curing ◽  
Effect Of Light

Diode-pumped solid-state laser for bonding orthodontic brackets: effect of light intensity and light-curing time

2010 ◽  
Vol 26 (5) ◽  
pp. 585-589 ◽  
Author(s):  
Young-Oh Kim ◽  
Soo-Byung Park ◽  
Woo-Sung Son ◽  
Ching-Chang Ko ◽  
Franklin García-Godoy ◽  
...  
Keyword(s):  
Solid State ◽  
Light Intensity ◽  
Solid State Laser ◽  
Orthodontic Brackets ◽  
Curing Time ◽  
State Laser ◽  
Light Curing ◽  
Diode Pumped ◽  
Effect Of Light

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 ON GEMMAE FORMATION: IN MYCENA CITRICOLOR

1967 ◽  
Vol 45 (5) ◽  
pp. 675-679 ◽  
Author(s):  
C. J. Rodrigues Jr. ◽  
D. C. Arny
Keyword(s):  
Light Intensity ◽  
Ultraviolet Light ◽  
Exposure Time ◽  
Lesion Size ◽  
Yellow Pigment ◽  
Limited Size ◽  
Maximum Production ◽  
Near Ultraviolet ◽  
Test Conditions ◽  
Effect Of Light

Maximum production of gemmae and yellow pigment by Mycena citricolor occurred under a glass filter which transmitted near ultraviolet light (310–400 mμ) and infrared. Within the limits of test conditions involving four rather broad areas of the spectrum, gemmae formation decreased as wavelength of light increased. Optimum light intensity was between 20 and 160 ft-c. At 740 ft-c the optimum daily exposure time was 6 hours. Infected leaves of Coffee arabicz in the light produced lesions of limited size and having numerous gemmae, but, in the dark, lesion size was indeterminate and no gemmae were formed.

Effect of Light-Curing Exposure Time, Shade, and Thickness on the Depth of Cure of Bulk Fill Composites

2017 ◽  
Vol 42 (5) ◽  
pp. 505-513 ◽  
Author(s):  
A Rodriguez ◽  
P Yaman ◽  
J Dennison ◽  
D Garcia
Keyword(s):  
Statistical Analysis ◽  
Exposure Time ◽  
Light Exposure ◽  
Testing Machine ◽  
Knoop Hardness ◽  
Bonferroni Correction ◽  
Depth Of Cure ◽  
Light Curing ◽  
Hardness Values ◽  
Effect Of Light

SUMMARY Purpose: To investigate the effect of different light exposure times, shades, and thicknesses on the depth of cure (DOC) of bulk fill composites. Methods and Materials: Two bulk fill composites, Tetric EvoCeram Bulk Fill (TBF) and Sonic Fill (SF), and a conventional composite, Filtek Supreme Ultra (FSU), were evaluated. Samples (n=10) were made using two different shades (light and dark), thicknesses (2 and 4 mm) and exposure times (20 and 40 seconds). A Tukon 2100B-testing machine was used to obtain three Knoop hardness numbers (KHNs) measured at the top and bottom of each sample, and DOC was calculated as the bottom/top ratio. Statistical analysis was done using a Student t-test for comparisons between groups with a Bonferroni correction of p < 0.004. Results: Top hardness values ranged from 79.79 to 85.07 for FSU, 69.49 to 91.65 for SF, and 51.01 to 57.82 for TBF. Bottom KHNs ranged from 23.54 to 73.25 for FSU, 45.74 to 77.12 for SF, and 36.95 to 52.51 for TBF. TBF had the lowest overall KHNs. Light-curing exposure time, shade, and material thickness influenced the DOC in most groups, especially at 4-mm depths. A higher bottom/top ratio was achieved when a 40-second cure was compared to a 20-second cure, when light shades were compared to dark shades, and when 2-mm increments were compared to 4-mm increments.

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 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

scholarly journals Effect of Light Intensity and Curing Time on Color Stability of a Methacrylate-Based Composite Resin Using an LED Light-Curing Unit

2019 ◽  
Vol 11 (3) ◽  
pp. 83-88
Author(s):  
Hosna Teimourian ◽  
Negin Farahmandpour ◽  
Maryam Zali Moghadam ◽  
Hoda Pouyanfar ◽  
Narges Panahandeh
Keyword(s):  
Light Intensity ◽  
Composite Resin ◽  
Color Stability ◽  
Curing Time ◽  
Led Light ◽  
Light Curing ◽  
Effect Of Light
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