Please use this identifier to cite or link to this item: http://guaiaca.ufpel.edu.br:8080/handle/123456789/881
metadata.dc.type: Article
Title: Influence of light-curing units on the flexural strength and flexural modulus of different resin composites
Authors: Brandt, William Cunha
Cardoso, Leandro
Moraes, Rafael Ratto de
Correr Sobrinho, Lourenço
Sinhoreti, Mário Alexandre Coelho
Abstract: This study aimed to evaluate the flexural strength and flexural modulus of different resin composites (MasterFill, Opallis, Z250, Supreme) after photoactivation with quartz-tungsten-halogen (QTH - XL2500) or light-mitting diode (LED - Radii and Ultrablue Is) light-curing units (LCUs). Methods: The irradiance and spectral emission of each unit were evaluated using a power meter and a spectrometer. Flexural strength (MPa) was determined in a three-point bending test in accordance with the ISO4049 standard specifications. Flexural modulus (GPa) was measured from the linear-elastic range on the stress-eformation profile. Data were submitted to two-way ANOVA and Tukey’s test (p<0.05). Results: Different values for irradiance (850, 780 and 590 mW/cm2) and peak of emission (484,456, 467 nm) were detected for XL2500, Radii and Ultrablue Is, respectively. Flexural strength and modulus were dependent on both material and LCU. Among the resins, Z250 and Supreme showed significantly higher strength and modulus than MasterFill and Opallis. Comparing the LCUs, Ultrablue Is showed significantly lower flexural strength and modulus than the others. Conclusion: Flexural strength and modulus were dependent on the irradiance and the spectral emission of the curing units, as well on the resin composite tested.
Keywords: Composite resin
Light
Physical properties
Polymers
Photoactivation
Publisher: Universidade Estadual de Campinas
Citation: BRANDT, William Cunha; CARDOSO, Leandro; MORAES, Rafael Ratto de; CORRER SOBRINHO, Lourenço; SINHORETI, Mário Alexandre Coelho. Influence of light-curing units on the flexural strength and flexural modulus of different resin composites. Brazilian Journal of Oral Sciences, v. 7, p. 1555-1558, 2008.
URI: http://hdl.handle.net/123456789/881
Issue Date: 2008
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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