NDLI: Depth-Related Curing Potential of Ormocer- and Dimethacrylate-Based Bulk-Fill Composites

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Depth-Related Curing Potential of Ormocer- and Dimethacrylate-Based Bulk-Fill Composites

Content Provider	MDPI
Author	Tobias, T. Tauböck Oltramare, Ramona S. Odermatt, Reto Burrer, Phoebe Attin, Thomas
Copyright Year	2021
Description	The aim of this in vitro study was to investigate the degree of C=C double bond conversion of high-viscosity dimethacrylate- or ormocer-based bulk-fill composites as a function of measurement depth. Four bulk-fill composites (Tetric EvoCeram Bulk Fill, x-tra fil, SonicFill, and Bulk Ormocer) and the conventional nanohybrid composite Tetric EvoCeram were applied in standardized Class II cavities (n = 6 per group) and photoactivated for 20 s at 1350 $mW/cm^{2}$. The degree of conversion of the composites was assessed using Fourier-transform infrared spectroscopy at seven measurement depths (0.15, 1, 2, 3, 4, 5, 6 mm). Data were analyzed using repeated measures ANOVA and one-way ANOVA with Bonferroni post-hoc tests (α = 0.05). The investigated bulk-fill composites showed at least 80% of their maximum degree of conversion (80% $DC_{max}$) up to a measuring depth of at least 4 mm. Tetric EvoCeram Bulk Fill and Bulk Ormocer achieved more than 80% $DC_{max}$ up to a measuring depth of 5 mm, x-tra fil up to 6 mm. The conventional nanohybrid composite Tetric EvoCeram achieved more than 80% $DC_{max}$ up to 3 mm. In contrast to the conventional composite, the investigated ormocer- and dimethacrylate-based bulk-fill composites can be photo-polymerized in thick layers of up to at least 4 mm with regard to their degree of C=C double bond conversion.
Starting Page	6753
e-ISSN	19961944
DOI	10.3390/ma14226753
Journal	Materials
Issue Number	22
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-11-09
Access Restriction	Open
Subject Keyword	Materials Bulk-fill Resin Composite Degree of Conversion Ormocer-based Bulk-fill Composite Polymerization
Content Type	Text
Resource Type	Article

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