Cross-link Density Evaluation Through Softening Tests: Effect Of Ethanol Concentration.

dc.creatorSchneider, Luis Felipe J
dc.creatorMoraes, Rafael R
dc.creatorCavalcante, Larissa M
dc.creatorSinhoreti, Mário A C
dc.creatorCorrer-Sobrinho, Lourenço
dc.creatorConsani, Simonides
dc.date2008-Feb
dc.date2015-11-27T13:12:28Z
dc.date2015-11-27T13:12:28Z
dc.date.accessioned2018-03-29T01:06:17Z
dc.date.available2018-03-29T01:06:17Z
dc.identifierDental Materials : Official Publication Of The Academy Of Dental Materials. v. 24, n. 2, p. 199-203, 2008-Feb.
dc.identifier0109-5641
dc.identifier10.1016/j.dental.2007.03.010
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/17544496
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/197669
dc.identifier17544496
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1297902
dc.descriptionThe aim of this study was to investigate whether the ethanol concentration used would influence the outcomes obtained through softening tests when comparing light-activation modes. Disc specimens (n=20) of Filtek Z250 and Filtek Z100 (3M ESPE) were light activated by standard (S) and pulse-delay (PD) modes. Initial Knoop hardness (KHN) measurements were performed 24h after dry storage at 37 degrees C. Half of the specimens (n=10) of each resin-composite were stored in absolute ethanol (100%) and the other half in 75% ethanol solution, for 24h at room temperature, and KHN was determined anew. Initial hardness data were submitted to Student's t-test (p=0.05). Percentages of hardness decrease were analyzed by two-way ANOVA followed by pairwise Tukey's test (p=0.05). The statistical analyses were performed separately for each resin-composite. No statistically significant differences were observed between standard and pulse-delay modes for initial Knoop hardness values. After storage in 75% ethanol solution, KHN was decreased in all cases but no significant differences were detected between light-activation modes (Filtek Z250: PD=12.6%, S=13.5%; Filtek Z100: PD=13.5%, S=11.8%) regardless of the resin-composite tested. After absolute ethanol storage, higher decrease in KHN were observed. Samples light-activated by the PD mode (Filtek Z250=20.4% and Filtek Z100=16.9%) exhibited significantly higher percentage decrease of KHN than specimens light-activated by the standard mode (Filtek Z250=14.1% and Filtek Z100=8.8%), regardless of the resin-composite tested. The ethanol concentration affected the outcomes of the softening test.
dc.description24
dc.description199-203
dc.languageeng
dc.relationDental Materials : Official Publication Of The Academy Of Dental Materials
dc.relationDent Mater
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectComposite Resins
dc.subjectCross-linking Reagents
dc.subjectEthanol
dc.subjectHardness
dc.subjectHumans
dc.subjectLight
dc.subjectMaterials Testing
dc.subjectPolymers
dc.subjectRadiation Dosage
dc.subjectSilicon Dioxide
dc.subjectSolvents
dc.subjectTemperature
dc.subjectTime Factors
dc.subjectZirconium
dc.titleCross-link Density Evaluation Through Softening Tests: Effect Of Ethanol Concentration.
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución