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

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 D...

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Autores principales: Säilynoja, Eija, Garoushi, Sufyan, Vallittu, Pekka K., Lassila, Lippo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309262/
https://www.ncbi.nlm.nih.gov/pubmed/34301038
http://dx.doi.org/10.3390/polym13142281
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author Säilynoja, Eija
Garoushi, Sufyan
Vallittu, Pekka K.
Lassila, Lippo
author_facet Säilynoja, Eija
Garoushi, Sufyan
Vallittu, Pekka K.
Lassila, Lippo
author_sort Säilynoja, Eija
collection PubMed
description 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 m(1/2)) values and LuxaCore showed the lowest values (1 MPa m(1/2)) 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.
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spelling pubmed-83092622021-07-25 Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites Säilynoja, Eija Garoushi, Sufyan Vallittu, Pekka K. Lassila, Lippo Polymers (Basel) Article 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 m(1/2)) values and LuxaCore showed the lowest values (1 MPa m(1/2)) 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. MDPI 2021-07-12 /pmc/articles/PMC8309262/ /pubmed/34301038 http://dx.doi.org/10.3390/polym13142281 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Säilynoja, Eija
Garoushi, Sufyan
Vallittu, Pekka K.
Lassila, Lippo
Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title_full Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title_fullStr Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title_full_unstemmed Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title_short Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
title_sort characterization of experimental short-fiber-reinforced dual-cure core build-up resin composites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309262/
https://www.ncbi.nlm.nih.gov/pubmed/34301038
http://dx.doi.org/10.3390/polym13142281
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