Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites
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 (DKHN) was recorded as the difference between pre and post-storage values. KHN1 data were submitted to one-way ANOVA and Tukey's test (alpha = 0.05), and hardness deterioration was analyzed by two-way ANOVA and Tukey's test (alpha= 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% ethanol.
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ABM, ABC, ABPol
2007
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oai:scielo:S1516-143920070001000172007-05-03Influence of ethanol concentration on softening tests for cross-link density evaluation of dental compositesMoraes,Rafael Ratto deSchneider,Luis Felipe JochimsCorrer-Sobrinho,LourençoConsani,SimonidesSinhoreti,Mário Alexandre Coelho dental composite cross-link density ethanol softening 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 (DKHN) was recorded as the difference between pre and post-storage values. KHN1 data were submitted to one-way ANOVA and Tukey's test (alpha = 0.05), and hardness deterioration was analyzed by two-way ANOVA and Tukey's test (alpha= 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% ethanol.info:eu-repo/semantics/openAccessABM, ABC, ABPolMaterials Research v.10 n.1 20072007-03-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000100017en10.1590/S1516-14392007000100017 |
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Moraes,Rafael Ratto de Schneider,Luis Felipe Jochims Correr-Sobrinho,Lourenço Consani,Simonides Sinhoreti,Mário Alexandre Coelho |
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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 |
author_facet |
Moraes,Rafael Ratto de Schneider,Luis Felipe Jochims Correr-Sobrinho,Lourenço Consani,Simonides Sinhoreti,Mário Alexandre Coelho |
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Moraes,Rafael Ratto de |
title |
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
title_short |
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
title_full |
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
title_fullStr |
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
title_full_unstemmed |
Influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
title_sort |
influence of ethanol concentration on softening tests for cross-link density evaluation of dental composites |
description |
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 (DKHN) was recorded as the difference between pre and post-storage values. KHN1 data were submitted to one-way ANOVA and Tukey's test (alpha = 0.05), and hardness deterioration was analyzed by two-way ANOVA and Tukey's test (alpha= 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% ethanol. |
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ABM, ABC, ABPol |
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2007 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392007000100017 |
work_keys_str_mv |
AT moraesrafaelrattode influenceofethanolconcentrationonsofteningtestsforcrosslinkdensityevaluationofdentalcomposites AT schneiderluisfelipejochims influenceofethanolconcentrationonsofteningtestsforcrosslinkdensityevaluationofdentalcomposites AT corrersobrinholourenco influenceofethanolconcentrationonsofteningtestsforcrosslinkdensityevaluationofdentalcomposites AT consanisimonides influenceofethanolconcentrationonsofteningtestsforcrosslinkdensityevaluationofdentalcomposites AT sinhoretimarioalexandrecoelho influenceofethanolconcentrationonsofteningtestsforcrosslinkdensityevaluationofdentalcomposites |
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