The comparison of relative reliability on biaxial and three point flexural strength testing methods of light curing composite resin

2006 ◽  
Vol 31 (1) ◽  
pp. 58 ◽  
Author(s):  
Deog-Gyu Seo ◽  
Byoung-Duck Roh
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Strength Testing ◽  
Testing Methods ◽  
Relative Reliability ◽  
Light Curing

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. 

scholarly journals The effect of specimen dimensions on the flexural strength of a composite resin

2005 ◽  
Vol 13 (3) ◽  
pp. 265-268 ◽  
Author(s):  
Antonio Muench ◽  
Ivo Carlos Correa ◽  
Rosa Helena Miranda Grande ◽  
Mário João
Keyword(s):  
Flexural Strength ◽  
Composite Resin ◽  
Specimen Length ◽  
Light Curing ◽  
Different Dimensions

PUORPOSE: The aim of this study was to evaluate the effect of specimen dimensions on the flexural strength of a composite resin (Heliomolar RO). METHODS: The different dimensions tested - length x width x height (mm) were: 25x2x4; 25x2x2 (ISO 4049); 15x2x2; 10x2x2 and 10x2x1. Light-curing was performed at 600 mW/cm² for 40s, three times along the 25mm specimens, twice along 15mm specimen and once for the 10mm specimens. Specimens of all dimensions were light-cured on both surfaces, or only on one side. In the latter, the load was applied on the irradiated side or on the opposite one. RESULTS: It was shown that the flexural strength was not affected by specimen length. When light-curing was performed on both surfaces, similar flexural strength values were obtained for any dimension. Despite the number of irradiated surfaces, specimens with a height of 1mm also obtained similar values. On the contrary, specimens with a height of 4mm, exposed only on one surface, reached the lowest strength. CONCLUSION: The use of specimens with lower dimensions can lead to flexural strength values similar to the ones obtained with standardized specimen (ISO 4049), with the advantage of demanding less amount of material and being less time consuming.

scholarly journals Ball‐on‐ring Test Validation for Equibiaxial Flexural Strength Testing of Engineered Ceramics

2021 ◽  
Author(s):  
Adrianna E. Lupercio ◽  
Ehsan Moshkelgosha ◽  
Riley C. Winters ◽  
Cayden Doyle ◽  
Mahmood Mamivand ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Test Validation ◽  
Ring Test ◽  
Strength Testing

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

Chairside CAD/CAM materials. Part 2: Flexural strength testing

2017 ◽  
Vol 33 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Michael Wendler ◽  
Renan Belli ◽  
Anselm Petschelt ◽  
Daniel Mevec ◽  
Walter Harrer ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Strength Testing ◽  
Cad Cam

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

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 The Influence of Different Light Curing Modes on the Depth of Cure of the Composite Resin

2018 ◽  
Vol 35 (1) ◽  
pp. 58-64
Author(s):  
Nikola Miljković ◽  
Stefan Dačić ◽  
Tamara Karuntanović ◽  
Marko Igić ◽  
Milica Dačić ◽  
...  
Keyword(s):  
Composite Resin ◽  
Composite Layer ◽  
Composite Specimen ◽  
Depth Of Cure ◽  
Average Value ◽  
Clinical Recommendation ◽  
Significant Difference ◽  
Light Curing ◽  
Metal Block ◽  
Digital Caliper

Summary The aim of this study was to investigate the influence of different light curing modes on the depth of cure of the composite resin. The metal block with formed round holes served as a mold for the placement of the composite resin. The composite resin was cured with Penguin DB-685 lamp with four optional working modes: strong, low, gradually strong, and flashing. Unpolymerized part of the composite specimen was removed by scraping with a plastic spatula, and then each specimen was placed into the capsule with 1 ml of ethanol alcohol and mixed for 20 s in amalgamator. The length of the remaining composite specimen was measured with the digital caliper with a precision of 0.01 mm. The measured values were divided by 2 (according to ISO 4049 standard) and then statistically processed. Based on the measured lengths of the polymerized part of the composite specimens, the lowest average value of the depth of cure (2.75 ± 0.08 mm) was determined after polymerization with the low mode and the highest value was obtained (2.98 ± 0.08 mm) with strong polymerization mode. Statistically significant difference (p < 0.05) was determined between low polymerization mode and all other modes (strong, gradually strong and flashing mode). The observed statistically significant differences are not clinically important because all curing modes provided the necessary depth of cure, which is in accordance with the clinical recommendation of 2 mm thick composite layer.

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