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Article

Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites

1
Research Development and Production Department, Stick Tech Ltd.—Member of GC Group, 20520 Turku, Finland
2
Department of Biomaterials Science and Turku Clinical Biomaterial Center—TCBC, Institute of Dentistry, University of Turku, 20500 Turku, Finland
3
City of Turku Welfare Division, Oral Health Care, 20101 Turku, Finland
*
Author to whom correspondence should be addressed.
Academic Editor: Luciano Feo
Polymers 2021, 13(14), 2281; https://doi.org/10.3390/polym13142281
Received: 18 June 2021 / Revised: 7 July 2021 / Accepted: 8 July 2021 / Published: 12 July 2021
As a core build-up material, dual-cured (DC) resin-based composites are becoming popular. The aim of this research was to investigate specific physical and handling properties of new experimental short-fiber-reinforced DC resin composites (SFRCs) in comparison to different commercial, conventional DC materials (e.g., Gradia Core, Rebilda DC, LuxaCore Z, and Visalys® CemCore). Degree of monomer conversion (DC%) was determined by FTIR-spectrometry using either self- or light-curing mode. The flexural strength, modulus, and fracture toughness were calculated through a three-point bending setup. Viscosity was analyzed at room (22 °C) and mouth (35 °C) temperatures with a rotating disk rheometer. The surface microstructure of each resin composite was examined with scanning electron microscopy (SEM). Data were statistically analyzed with analysis of variance ANOVA (p = 0.05). The curing mode showed significant (p < 0.05) effect on the DC% and flexural properties of tested DC resin composites and differences were material dependent. SFRC exhibited the highest fracture toughness (2.3 MPa m1/2) values and LuxaCore showed the lowest values (1 MPa m1/2) among the tested materials (p < 0.05). After light curing, Gradia Core and SFRCs showed the highest flexural properties (p < 0.05), while the other resin composites had comparable values. The novel DC short-fiber-reinforced core build-up resin composite demonstrated super fracture toughness compared to the tested DC conventional resin composites. View Full-Text
Keywords: physical properties; fiber-reinforced resin; core-build-up material; fracture toughness physical properties; fiber-reinforced resin; core-build-up material; fracture toughness
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MDPI and ACS Style

Säilynoja, E.; Garoushi, S.; Vallittu, P.K.; Lassila, L. Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites. Polymers 2021, 13, 2281. https://doi.org/10.3390/polym13142281

AMA Style

Säilynoja E, Garoushi S, Vallittu PK, Lassila L. Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites. Polymers. 2021; 13(14):2281. https://doi.org/10.3390/polym13142281

Chicago/Turabian Style

Säilynoja, Eija, Sufyan Garoushi, Pekka K. Vallittu, and Lippo Lassila. 2021. "Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites" Polymers 13, no. 14: 2281. https://doi.org/10.3390/polym13142281

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