PREHEATING OF SILORANE-BASED COMPOSITES

Year 2022, Volume: 1 Issue: 1, 1 - 9, 24.04.2022

Nihan Gonulol , Emel Karaman , Duygu Tuncer

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.

Keywords

Composite preheating, Degree of conversion, Polymerization Shrinkage, Silorane-based composites

Siloran-esaslı Kompozitlerde Ön Isıtma/Preheating of 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 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
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.
Keywords: Composite preheating, Degree of conversion,
Polymerization Shrinkage, Silorane-based composites

Keywords

Composite preheating, Degree of conversion, Polymerization Shrinkage, Silorane-based composites, Kompozit ön ısıtma, Dönüşüm derecesi, Polimerizasyon Büzülmesi, Siloran bazlı kompozitler

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