IADR Abstract Archives
Experimental Universal Bulk-Fill Composite
Objectives: An experimental universal composite, comprising a packable (EUCpack) and a flowable viscosity (EUCflow), aims to unite fast bulk-curing with tooth-like esthetic. Such materials would combine the desirable topics on efficiency for posterior restorations and esthetics for anterior restorations.
This study focuses on the physical properties of the experimental materials, as compared to the clinically proven reference materials Tetric PowerFill (TPfill) and Tetric PowerFlow (TPflow) (Ivoclar).
Comparison of the materials’ esthetics will follow elsewhere.
Methods: EUCpack and EUCflow as well as the reference materials TPfill and TPflow were polymerized in 3s, using the light curing unit Tetric PowerCure (Ivoclar) at an irradiance of 3050 mW/cm2. The physical properties tested are shown in Table 1.
Results: EUCpack and TPfill exhibited comparable properties for flexural strength and E-modulus, as well as depth of cure determined by ISO4049:2019. Depth of cure by Vicker`s hardness reliably achieving 4mm (80% surface hardness) and absolute hardness at >500 N/mm2. Both volumetric shrinkage and shrinkage stress were comparable.
EUCflow and TPflow performed in a similarly comparable fashion. The mechanical properties are comparable, and the depth of cure of 4mm is reliably met by Vicker‘s hardness measurements. The shrinkage values of EUCflow are higher compared to TPflow due to the adapted filler particle size for anterior restorations and the correlating monomer content.
Both experimental universal composites achieve depth of cure of 4mm reliably but, due to the esthetic shading, the depth of cure is reduced compared to the reference bulk-fill materials. Nevertheless, this difference can only be seen in the Vicker`s hardness values, whereas the depth of cure measurements (ISO 4049) indicates same performance. [7]
Conclusions: Both consistencies of the experimental composites exhibited comparable performance to clinically proven reference materials using fast-curing times of 3s @ 3050 mW/cm2. As to be expected, packable consistencies showed higher mechanical values and lower shrinkage compared to the flowable materials due to the higher filler content.
Physical properties of the experimental universal 3s-curing bulk material met the characteristics of the known efficient posterior reference materials.
This study focuses on the physical properties of the experimental materials, as compared to the clinically proven reference materials Tetric PowerFill (TPfill) and Tetric PowerFlow (TPflow) (Ivoclar).
Comparison of the materials’ esthetics will follow elsewhere.
Methods: EUCpack and EUCflow as well as the reference materials TPfill and TPflow were polymerized in 3s, using the light curing unit Tetric PowerCure (Ivoclar) at an irradiance of 3050 mW/cm2. The physical properties tested are shown in Table 1.
Results: EUCpack and TPfill exhibited comparable properties for flexural strength and E-modulus, as well as depth of cure determined by ISO4049:2019. Depth of cure by Vicker`s hardness reliably achieving 4mm (80% surface hardness) and absolute hardness at >500 N/mm2. Both volumetric shrinkage and shrinkage stress were comparable.
EUCflow and TPflow performed in a similarly comparable fashion. The mechanical properties are comparable, and the depth of cure of 4mm is reliably met by Vicker‘s hardness measurements. The shrinkage values of EUCflow are higher compared to TPflow due to the adapted filler particle size for anterior restorations and the correlating monomer content.
Both experimental universal composites achieve depth of cure of 4mm reliably but, due to the esthetic shading, the depth of cure is reduced compared to the reference bulk-fill materials. Nevertheless, this difference can only be seen in the Vicker`s hardness values, whereas the depth of cure measurements (ISO 4049) indicates same performance. [7]
Conclusions: Both consistencies of the experimental composites exhibited comparable performance to clinically proven reference materials using fast-curing times of 3s @ 3050 mW/cm2. As to be expected, packable consistencies showed higher mechanical values and lower shrinkage compared to the flowable materials due to the higher filler content.
Physical properties of the experimental universal 3s-curing bulk material met the characteristics of the known efficient posterior reference materials.
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