Effect of self and dual-curing on degree of conversion and crosslink density of dual-cure core build-up materials

Karakış, Duygu; Doğan, Arife; Koralay, Haluk; Çavdar, Şükrü

doi:10.1016/j.jpor.2016.05.002

Cited by 15 publications

(29 citation statements)

References 41 publications

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“…Since the parameters of the present and previous study [ 22 ] were fairly similar, such large differences in monomer elution from Clearfil-Self and Clearfil-Dual should be attributed to variations in sample preparation, i.e., dosage and mixing of base and catalyst. As expected, these variations were more pronounced in the case of the self-cured than dual-cured material, which is in agreement with the study of Karakis et al [ 36 ]…”

Section: Discussionsupporting

confidence: 93%

Effect of the Degree of Conversion on Mechanical Properties and Monomer Elution from Self-, Dual- and Light-Cured Core Composites

et al. 2021

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The objective of this work was to measure and correlate the degree of conversion (DC), mechanical properties and monomer elution from self-, dual- and light-cured core composites. Five samples of each of the following materials were prepared for each test: Clearfil (Core, Photo Core, Automix), Bisco (Core-Flo, Light-Core and Bis-Core). DC was determined using FTIR, compressive and flexural strength and modulus of elasticity using a universal testing machine and microhardness using Vickers hardness. Elution was measured using HPLC. One-way ANOVA with Tukey’s post-test and Pearson’s correlation were used to statistically analyze the data. DC of Clearfil-Dual (70.1%) and Clerafil-Photo (66.8%) were higher than Clearfil-Self (55.4%) and all Bisco materials (51.4–55.3%). Flexural strength of Clearfilwas higher than that of Bisco composites. The Microhardness of Clearfil-Dual (119.8VHN) and Clearfil-Photo (118.0VHN) were higher compared to other materials. The greatest elution was detected from self-cured materials. DC positively correlated to microhardness and compressive/flexural strength and negatively to BisGMA elution. Clearfil-Photo and Automix showed higher conversion, lower monomer elution and, generally, better mechanical properties. Self-cured composites should not be recommended for routine clinical use as their performance was inferior to dual- and light-cured composites. Microhardness may be used as an indicator of elution.

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Section: Discussionsupporting

confidence: 93%

Effect of the Degree of Conversion on Mechanical Properties and Monomer Elution from Self-, Dual- and Light-Cured Core Composites

et al. 2021

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“…The tendency to favor a light-curing mode, as seen in this study, supports prior findings [ 7 , 18 ]. It can be noted that another type of dual-cure resin composite, i.e., luting resin composite, has previously shown a similar tendency [ 19 , 20 ].…”

Section: Discussionsupporting

confidence: 92%

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

et al. 2021

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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.

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“…This actually differs from the procedure of polymerization that is typically employed in a clinical situation, where it is being done from one side only. A recent study 30) revealed that in Clearfil DC Core Automix One, the degree of conversion showed no statistical difference between self and dual cured modes.…”

Section: Discussionmentioning

confidence: 94%

Comprehensive micro-mechanical characterization of experimental direct core build-up resin composites with different amounts of filler contents

et al. 2019

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Dual-cured resin-based composites are gaining popularity as core build-up materials. Physical and elastoplastic characteristics of new experimental core build-up materials with variable filler contents (+2.5 and +5 wt%) were investigated using classic macroexperiments and nanoindentation. Flexural fracture strength increased from 91.7±11.8 to 114.1±9.1 and 116.6±14.7 MPa in the +2.5 and +5 wt% groups, respectively; similarly, elastic moduli increased from 12.6±0.9 to 15.4±1.2 and 15.3±2.0 MPa, respectively. Fracture toughness increased from 1.82±0.60 to 2.28±0.53 and 2.67±0.88 MPa•m 1/2 for the +2.5 and +5 wt% groups, respectively; indentation hardness increased significantly from 0.45±0.03 to 0.55±0.04 and 0.60±0.10 GPa, respectively. The addition of +5 wt% filler content led to a mechanically superior material; the addition of +2.5 wt% filler led to better reliability.

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Effect of self and dual-curing on degree of conversion and crosslink density of dual-cure core build-up materials

Cited by 15 publications

References 41 publications

Effect of the Degree of Conversion on Mechanical Properties and Monomer Elution from Self-, Dual- and Light-Cured Core Composites

Effect of the Degree of Conversion on Mechanical Properties and Monomer Elution from Self-, Dual- and Light-Cured Core Composites

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

Comprehensive micro-mechanical characterization of experimental direct core build-up resin composites with different amounts of filler contents

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