Please use this identifier to cite or link to this item: http://guaiaca.ufpel.edu.br:8080/handle/123456789/882
metadata.dc.type: Article
Title: Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites
Authors: Moraes, Rafael Ratto de
Schneider, Luis Felipe Jochims
Correr Sobrinho, Lourenço
Consani, Simonides
Sinhoreti, Mário Alexandre Coelho
Abstract: This study investigated the influence of ethanol concentration on softening tests for cross-link density evaluation (microhardness) of dental composites. Specimens of Filtek Z100 (3M ESPE) were light-activated by standard or pulse-delay methods. After initial Knoop hardness readings (KHN1), half of specimens (n = 10) for each irradiation method was stored in 100% ethanol, and half in 75% ethanol, during 24 hours, and hardness was determined anew. Hardness deterioration (ΔKHN) was recorded as the difference between pre and post-storage values. KHN1 data were submitted to one-way ANOVA and Tukey’s test (α = 0.05), and hardness deterioration was analyzed by two-way ANOVA and Tukey’s test (α = 0.05). For KHN1, no significant differences were detected between the activation modes (p = 0.697). Samples light-activated by the pulse-delay method presented significantly higher softening compared to the standard mode when samples were immersed in 100% ethanol. Conversely, no significant differences between curing modes were detected for samples stored in 75% etanol.
Keywords: Dental composite
Cross-link density
Ethanol
Softening
Publisher: Cubo Multimidia
Citation: MORAES, Rafael Ratto de; SCHNEIDER, Luis Felipe Jochims; CORRER SOBRINHO, Lourenço; CONSANI, Simonides; SINHORETI, Mário Alexandre Coelho. Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites. Materials Research (São Carlos. Impresso), v. 10, p. 79-81, 2007.
URI: http://hdl.handle.net/123456789/882
Issue Date: 2007
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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