scholarly journals flexural strength of dual cured composite resin cements polymerized with different light sources

2011 ◽  
Vol 11 (3) ◽  
pp. 310-316
Author(s):  
Ali Rasheed ◽  
Eman Yahya ◽  
Sabah Ismail
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Light Sources ◽  
Resin Cements

scholarly journals Effect of light sources and curing mode techniques on sorption, solubility and biaxial flexural strength of a composite resin

2012 ◽  
Vol 20 (2) ◽  
pp. 246-252 ◽  
Author(s):  
Andreia Assis Carvalho ◽  
Francine do Couto Lima Moreira ◽  
Rodrigo Borges Fonseca ◽  
Carlos José Soares ◽  
Eduardo Batista Franco ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Light Sources ◽  
Biaxial Flexural Strength ◽  
Effect Of Light

Evaluation of the flexural strength of dual-cure composite resin cements

2013 ◽  
Vol 101B (5) ◽  
pp. 878-881 ◽  
Author(s):  
Zeynep Yesil Duymus ◽  
Nuran Dinckal Yanikoğlu ◽  
Murat Alkurt
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Resin Cements

scholarly journals Effect of Activation Mode on Flexural Strength and Elasticity Modulus of Dual Cure Resin Cements

2016 ◽  
Vol 18 (1) ◽  
pp. 61
Author(s):  
Isadora Guimaraes DDS, MSc, PhD ◽  
Fabian Murillo DDS, MSc ◽  
Mario De Goes DDS, MSc, PhD
Keyword(s):  
Flexural Strength ◽  
Elasticity Modulus ◽  
Composite Resin ◽  
Testing Machine ◽  
Resin Cements ◽  
Adhesive Resin ◽  
Luting Cements ◽  
Direct Light ◽  
Light Curing ◽  
Flexural Tests

Objective: This study evaluated the effect of the activation mode on flexural strength and elasticity modulus of four dual cure resin-based cements.  Methods: Two self-adhesive resin cements (Clearfil SA Cement (CSA) and  RelyX U100 (U)) and two conventional resin cements (Clearfil Esthetic Cement (CE)and RelyX ARC (ARC)) were used to produce a total of 45 bar specimens (7x2x2 mm) using three different activation modes (n=15): Direct light-cure (D), Indirect light-cure using a 2mm composite resin barrier (I) and Self-cure (S). Three-point flexural tests were performed after 24 hours water storage at 37° C, using a universal testing machine (Instron) at a cross-speed of 0.5 mm/min until fracture. Flexural strength (MPa) and elasticity modulus values were subjected to ANOVA and Tukey’s Test (=0.05). Results: Data revealed that light polymerized groups presented statistically higher flexural strength (CSA/D=113.63 ± 19.65; CSA/I=80.66 ± 23.74; U/D=101.33 ± 9.8; U/I=94.96 ± 36.9; CE/D=219.08 ± 39.94; CE/I=226.42 ± 34.59; ARC/D=150.03 ± 26.15; ARC/I=111.78 ± 14.28) and also  elasticity modulus values (CSA/D = 2.9 ± 0.6; CSA/I = 1.5 ± 0.4; U/D = 2.9 ± 0.5; U/I = 2.6 ± 1.4; CE/D = 6.5 ± 1.3; CE/I = 5.8 ± 1.0; ARC/D = 4.2 ± 0.93; ARC/I = 2.5 ± 0.5) compared to self-cured groups (flexural strength: CSA/S=65.81 ± 21.84; U/S=53.62 ± 28.73; CE/S=129.02 ± 51.67; ARC/S=77.98 ±19.61 and elasticity modulus: CSA/S = 1.4 ± 0.5; U/S = 1.2 ± 0.7; CE/S = 2.2 ± 1.5; ARC/S = 1.0 ± 0.5). The usage of a composite resin barrier only affected the mechanical properties of ARC and CSA. Conventional resin cements presented higher flexural strength values than the self-adhesive cements. CE presented the highest values compared to all other cements. No statistical difference was observed between self-adhesive cements. Conclusion: Light-curing of resin luting cements produced higher flexural strength for all tested materials. Similar mechanical behavior was observed for the tested self-adhesive cements. 

Flexural strength of glass fibre-reinforced posts bonded to dual-cure composite resin cements

2010 ◽  
Vol 118 (2) ◽  
pp. 197-201 ◽  
Author(s):  
Peter Davis ◽  
Luciana S. D. Melo ◽  
Richard M. Foxton ◽  
Martyn Sherriff ◽  
Peter Pilecki ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Glass Fibre ◽  
Composite Resin ◽  
Resin Cements ◽  
Glass Fibre Reinforced

scholarly journals Heat treatment of a direct composite resin: influence on flexural strength

2009 ◽  
Vol 23 (3) ◽  
pp. 241-247 ◽  
Author(s):  
Caroline Lumi Miyazaki ◽  
Igor Studart Medeiros ◽  
Ivone Lima Santana ◽  
Jivaldo do Rosário Matos ◽  
Leonardo Eloy Rodrigues Filho
Keyword(s):  
Heat Treatment ◽  
Flexural Strength ◽  
Composite Resin

scholarly journals Effect of Light-Sources and Thicknesses of Composite Onlays on Micro-Hardness of Luting Composites

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6849
Author(s):  
Francesco De Angelis ◽  
Mirco Vadini ◽  
Mario Capogreco ◽  
Camillo D’Arcangelo ◽  
Maurizio D’Amario
Keyword(s):  
High Power ◽  
Resin Composite ◽  
Composite Layer ◽  
Resin Cement ◽  
Specimen Thickness ◽  
Light Sources ◽  
Curing Time ◽  
Resin Cements ◽  
Halogen Light ◽  
Light Curing

The aim of this study was to compare three different light-curing-units (LCUs) and determine their effectiveness in the adhesive cementation of indirect composite restorations when a light-curing resin cement is used. Two resin composites were selected: Enamel Plus HRI (Micerium) and AURA (SDI). Three thicknesses (3 mm, 4 mm and 5 mm) were produced and applied as overlays and underlays for each resin composite. A standardized composite layer was placed between underlay and overlay surfaces. Light curing of the resin-based luting composites was attained through the overlay filters using LCUs for different exposure times. All specimens were allocated to experimental groups according to the overlay thickness, curing unit and curing time. Vickers Hardness (VH) notches were carried out on each specimen. Data were statistically evaluated. The curing unit, curing time and overlay thickness were significant factors capable of influencing VH values. The results showed significantly decreased VH values with increasing specimen thickness (p < 0.05). Significant differences in VH values were found amongst the LCUs for the various exposure times (p < 0.05). According to the results, a time of cure shorter than 80 s (with a conventional quartz–tungsten–halogen LCU) or shorter than 40 s (with a high-power light-emitting diode (LED) LCU) is not recommended. The only subgroup achieving clinically acceptable VH values after a short 20 s curing time included the 3 mm-thick overlays made out of the AURA composite, when the high-power LED LCU unit was used (VH 51.0). Composite thickness has an intense effect on polymerization. In clinical practice, light-cured resin cements may result in insufficient polymerization for high thickness and inadequate times. High-intensity curing lights can attain the sufficient polymerization of resin cements through overlays in a significantly shorter time than conventional halogen light.

scholarly journals Flexural strength of a composite resin light cured with different exposure modes and immersed in ethanol or distilled water media

2012 ◽  
Vol 15 (4) ◽  
pp. 333 ◽  
Author(s):  
MarcosRibeiro Moysés ◽  
Carlos EduardoPinto Alcântara ◽  
José CarlosRabelo Ribeiro ◽  
João GustavoRabelo Ribeiro ◽  
SauloGalvão dos Santos
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Distilled Water ◽  
Water Media

scholarly journals Effect of light-activation methods and water storage on the flexural strength of two composite resins and a compomer

2006 ◽  
Vol 20 (2) ◽  
pp. 143-147 ◽  
Author(s):  
Leonardo Eloy Rodrigues Filho ◽  
Luis Antônio dos Santos Burger ◽  
Silvia Kenshima ◽  
José Roberto de Oliveira Bauer ◽  
Igor Studart Medeiros ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Water Storage ◽  
Storage Period ◽  
Multiple Comparisons ◽  
Composite Resins ◽  
Activation Method ◽  
Light Activation ◽  
Tukey Test ◽  
Effect Of Light

The present study evaluated the flexural strength of three composite resins recommended for direct esthetic restorations: a polyacid modified composite (Dyract AP), a unimodal composite resin (Filtek Z250) and a hybrid composite resin (Point 4). The variation factors, apart from the type of composite resin, were the light activation method and the water storage period. The composite resins were light-cured in continuous mode (40 s, 500 mW/cm²) or in ramp mode (0-800 mW/cm² for 10 s followed by 30 s at 800 mW/cm²) and stored for 24 hours or 30 days in distilled water at 37°C. The data were analyzed by ANOVA and Tukey test for multiple comparisons (alpha = 0.05). The composite resin Z250 presented the highest mean flexural strength (166.74 MPa) and Dyract AP presented the lowest one (129.76 MPa). The storage for 30 days decreased the flexural strength in ramp mode (24 h: 156.64 MPa; 30 days: 135.58 MPa). The light activation method alone did not lead to different flexural strength values.

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