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AI InsightPreheating of both silorane-based anddimethacrylate-based composites prior to polymerizationmay be beneficial to enhance degree of conversion.Keywords: Composite preheating, Degree of conversion,Polymerization Shrinkage, Silorane-based composites
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Özet
Aim: To evaluate the degree of conversion,and polymerization shrinkage of silorane-based(Filtek Silorane, 3M ESPE St. Paul, MN, USA) anddimethacrylate-based (Filtek Z550, 3M ESPE, St. Paul,MN, USA) composites after preheating procedures.Materials and Methods: For assessing degreeof conversion, three cylindrical specimens for eachexperimental condition (4 °C, 21 °C, 39°C, 55°C)were built in a Teflon mold and after 24 h storage aFourier transform infrared spectrometer was used foranalyses. The volumetric polymerization shrinkage of thecomposite resins was determined using a video imagingdevice (n=10). Student’s t-test and one-way ANOVA withTukey multiple comparison tests (p< 0.05) were used toassess the results.Results: In terms of all tested parameters andtemperatures, Filtek Z550 showed higher values thanFiltek Silorane (p< 0.05). The preheated groups showedbetter degree of conversion for both of the compositegroups. Preheating procedures did not significantly altervolumetric polymerization shrinkage values of the testedcomposite groups (p>0.05).Conclusion: Preheating caused a higher degree ofconversion for silorane-based and dimethacrylate-basedcomposites. Preheating of both silorane-based anddimethacrylate-based composites prior to polymerizationmay be beneficial to enhance degree of conversion.Keywords: Composite preheating, Degree of conversion,Polymerization Shrinkage, Silorane-based composites
Abstract
Aim: To evaluate the degree of conversion, and polymerization shrinkage of silorane-based (Filtek Silorane, 3M ESPE St. Paul, MN, USA) and dimethacrylate-based (Filtek Z550, 3M ESPE, St. Paul, MN, USA) composites after preheating procedures. Materials and Methods: For assessing the degree of conversion, three cylindrical specimens for each experimental condition (4 °C, 21 °C, 39°C, 55°C) were built in a Teflon mold and after 24 h storage a Fourier transform infrared spectrometer was used for analyses. The volumetric polymerization shrinkage of the composite resins was determined using a video imaging device (n=10). Student’s t-test and one-way ANOVA with Tukey multiple comparison tests (p< 0.05) were used to assess the results. Results: In terms of all tested parameters and temperatures, Filtek Z550 showed higher values than Filtek Silorane (p< 0.05). The preheated groups showed a better degree of conversion for both of the composite groups. Preheating procedures did not significantly alter volumetric polymerization shrinkage values of the tested composite groups (p>0.05). Conclusion: Preheating caused a higher degree of conversion for silorane-based and dimethacrylate-based composites. Preheating of both silorane-based and dimethacrylate-based composites prior to polymerization may be beneficial to enhance degree of conversion.