Micro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputs

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dc.coverageDOI: 10.4012/dmj.2016-430
dc.creatorAtria, Pablo J.
dc.creatorSampaio, Camila S.
dc.creatorCáceres, Eduardo
dc.creatorFernández, Jessica
dc.creatorReis, Andre F.
dc.creatorGiannini, Marcelo
dc.creatorCoelho, Paulo G.
dc.creatorHirata, Ronaldo
dc.date2018
dc.date.accessioned2025-11-18T19:40:56Z
dc.date.available2025-11-18T19:40:56Z
dc.description<p>This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm<sup>2</sup>); 2 —Low (650 mW/cm<sup>2</sup>); 3 —Soft-start (650–1,200 mW/cm<sup>2</sup>); and 4 —Turbo (2,000 mW/cm<sup>2</sup>). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p&gt;0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.</p>eng
dc.descriptionThis study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 —High (1,200 mW/cm2); 2 —Low (650 mW/cm2); 3 —Soft-start (650–1,200 mW/cm2); and 4 —Turbo (2,000 mW/cm2). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p&gt;0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.spa
dc.identifierhttps://investigadores.uandes.cl/en/publications/9aaf344b-5b2c-4ccb-a6ae-53bf07e9f383
dc.identifier.urihttps://repositorio.uandes.cl/handle/uandes/51545
dc.languageeng
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourcevol.37 (2018) nr.1 p.33-39
dc.subjectComposite
dc.subjectComputed-tomography
dc.subjectLight-curing
dc.subjectPolymerization
dc.subjectShrinkage
dc.titleMicro-computed tomography evaluation of volumetric polymerization shrinkage and degree of conversion of composites cured by various light power outputseng
dc.typeArticleeng
dc.typeArtículospa
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