Evaluation of experimental bioactive glass resin composites

2015 ◽  
Author(s):  
Muhammad Dian Firdausy
Keyword(s):  
Bioactive Glass ◽  
Resin Composites

scholarly journals Cytotoxicity of resin composites containing bioactive glass fillers

2015 ◽  
Vol 31 (2) ◽  
pp. 195-203 ◽  
Author(s):  
Satin Salehi ◽  
Fernanda Gwinner ◽  
John C. Mitchell ◽  
Carmem Pfeifer ◽  
Jack L. Ferracane
Keyword(s):  
Bioactive Glass ◽  
Resin Composites ◽  
Glass Fillers

scholarly journals Light Transmittance and Polymerization of Bulk-Fill Composite Materials Doped with Bioactive Micro-Fillers

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4087 ◽  
Author(s):  
Phoebe Dieckmann ◽  
Dirk Mohn ◽  
Matthias Zehnder ◽  
Thomas Attin ◽  
Tobias T. Tauböck
Keyword(s):  
Detection Limit ◽  
Portland Cement ◽  
Bioactive Glass ◽  
Knoop Hardness ◽  
Light Transmittance ◽  
Resin Composites ◽  
Bottom To Top ◽  
Glass Fillers ◽  
Barium Glass ◽  
Micro Fillers

This study investigated the effect of bioactive micro-fillers on the light transmittance and polymerization of three commercially available bulk-fill resin composites. These were mixed with 20 wt% bioactive glass 45S5, Portland cement, inert dental barium glass, or nothing (controls). Composites were photo-activated and light transmittance through 4 mm thick specimens was measured in real time. Moreover, degree of conversion (DC) and Knoop hardness (KHN) were assessed. Light transmittance of all bulk-fill composites significantly decreased (p < 0.05) with addition of 20 wt% bioactive glass 45S5 but not when inert barium glass was added. For bulk-fill composites modified with Portland cement, light irradiance dropped below the detection limit at 4 mm depth. The DC at the top surface of the specimens was not affected by addition of bioactive or inert micro-fillers. The bottom-to-top ratio of both DC and KHN surpassed 80% for bulk-fill composites modified with 20 wt% bioactive or inert glass fillers but fell below 20% when the composites were modified with Portland cement. In contrast to Portland cement, the addition of 20 wt% bioactive glass maintains adequate polymerization of bulk-fill composites placed at 4 mm thickness, despite a decrease in light transmittance compared to the unmodified materials.

Ion release and hydroxyapatite precipitation of resin composites functionalized with two types of bioactive glass

2022 ◽  
pp. 103950
Author(s):  
Matej Par ◽  
Andrea Gubler ◽  
Thomas Attin ◽  
Zrinka Tarle ◽  
Andro Tarle ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Resin Composites ◽  
Ion Release

scholarly journals Polymerization shrinkage behaviour of resin composites functionalized with unsilanized bioactive glass fillers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Matej Par ◽  
Dirk Mohn ◽  
Thomas Attin ◽  
Zrinka Tarle ◽  
Tobias T. Tauböck
Keyword(s):  
Bioactive Glass ◽  
Degree Of Conversion ◽  
Stress Rate ◽  
Partial Replacement ◽  
Shrinkage Stress ◽  
Resin Composites ◽  
Dental Resin ◽  
Polymerization Shrinkage ◽  
Reinforcing Fillers ◽  
Shrinkage Behaviour

Abstract Previous work has shown that partial replacement of reinforcing fillers with unsilanized silica particles can diminish polymerization shrinkage stress of dental resin composites. The aim of the present study was to investigate whether such an effect can be attained by using unsilanized bioactive glass (BG). Incorporating BG fillers into resin composites is interesting due to their potential for exerting caries-preventive effects. Experimental light-curable composites with a total filler load of 77 wt% were prepared. Reinforcing fillers were partially replaced with 0–60 wt% of BG 45S5 and an experimental low-sodium fluoride-containing BG. The following properties were investigated: linear shrinkage, degree of conversion, shrinkage stress, maximum shrinkage stress rate, and time to achieve maximum shrinkage stress rate. The diminishing effect of BG 45S5 on shrinkage stress was mediated by a decrease in degree of conversion caused by this BG type. In contrast, as the degree of conversion remained unaffected by the experimental BG, the resulting shrinkage behaviour was governed by the effect of varying amounts of silanized and unsilanized fillers on material’s viscoelastic properties. The replacement of silanized reinforcing fillers with unsilanized BG did not reduce polymerization shrinkage stress unless the reduction was attained indirectly through a diminished degree of conversion.

scholarly journals Degree of conversion of experimental resin composites containing bioactive glass 45S5: the effect of post-cure heating

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Matej Par ◽  
Nika Spanovic ◽  
Tobias T. Tauböck ◽  
Thomas Attin ◽  
Zrinka Tarle
Keyword(s):  
Bisphenol A ◽  
Bioactive Glass ◽  
Inhibitory Effect ◽  
Reactive Species ◽  
Independent Effect ◽  
Resin Composites ◽  
Resin System ◽  
Direct Inhibitory Effect ◽  
Urethane Dimethacrylate ◽  
Restricted Mobility

AbstractResin composites containing reinforcing inert glass fillers combined with bioactive glass (BG) can aid in the prevention of secondary caries, which is a major cause of failure of contemporary composite restorations. A series of previous studies on experimental resin composites filled with BG 45S5 has demonstrated that methacrylate resin polymerization can be impaired by the addition of unsilanized BG, leading to lower degrees of conversion (DC). In order to distinguish whether the polymerization inhibition is caused by a direct (temperature-independent) effect of BG or an indirect (temperature-dependent) effect of restricted mobility of reactive species, this study used Raman spectroscopy to evaluate the DC values of experimental composites post-cured at 37 °C and 150 °C. The potential of BG to adversely affect DC was highly dependent on the resin system. The highest DC reduction was observed in the resin system based on ethoxylated bisphenol A dimethacrylate (Bis-EMA), followed by bisphenol A glycidyl methacrylate (Bis-GMA). In contrast, the DC for urethane dimethacrylate (UDMA) was not compromised by BG. Increasing the mobility of reactive species by heating at 150 °C showed limited potential for increasing the DC in the Bis-EMA and Bis-GMA resin systems, indicating a direct inhibitory effect of BG on polymerization.

scholarly journals Incorporation of Copper-Doped Mesoporous Bioactive Glass Nanospheres in Experimental Dental Composites: Chemical and Mechanical Characterization

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2611
Author(s):  
Danijela Marovic ◽  
Håvard J. Haugen ◽  
Visnja Negovetic Mandic ◽  
Matej Par ◽  
Kai Zheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bioactive Glass ◽  
Flexural Modulus ◽  
Sol Gel ◽  
Organic Polymer ◽  
Resin Composites ◽  
Clinical Implementation ◽  
X Ray Diffraction ◽  
Dental Resin ◽  
Mesoporous Bioactive Glass

Experimental dental resin composites incorporating copper-doped mesoporous bioactive glass nanospheres (Cu-MBGN) were designed to impart antibacterial and remineralizing properties. The study evaluated the influence of Cu-MBGN on the mechanical properties and photopolymerization of resin composites. Cu-MBGN were synthesized using a microemulsion-assisted sol–gel method. Increasing amounts of Cu-MBGN (0, 1, 5, and 10 wt %) were added to the organic polymer matrix with inert glass micro- and nanofillers while maintaining a constant resin/filler ratio. Six tests were performed: X-ray diffraction, scanning electron microscopy, flexural strength (FS), flexural modulus (FM), Vickers microhardness (MH), and degree of conversion (DC). FS and MH of Cu-MBGN composites with silica fillers showed no deterioration with aging, with statistically similar results at 1 and 28 days. FM was not influenced by the addition of Cu-MBGN but was reduced for all tested materials after 28 days. The specimens with 1 and 5% Cu-MBGN had the highest FS, FM, MH, and DC values at 28 days, while controls with 45S5 bioactive glass had the lowest FM, FS, and MH. DC was high for all materials (83.7–93.0%). Cu-MBGN composites with silica have a potential for clinical implementation due to high DC and good mechanical properties with adequate resistance to aging.

scholarly journals Polymerization kinetics of experimental resin composites functionalized with conventional (45S5) and a customized low-sodium fluoride-containing bioactive glass

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Matej Par ◽  
Katica Prskalo ◽  
Tobias T. Tauböck ◽  
Hrvoje Skenderovic ◽  
Thomas Attin ◽  
...  
Keyword(s):  
Bioactive Glass ◽  
Polymerization Kinetics ◽  
Light Transmittance ◽  
Polymerization Reaction ◽  
Resin Composites ◽  
Dental Resin ◽  
Low Sodium ◽  
Dental Resin Composites ◽  
Light Curing ◽  
Thick Layers

AbstractThis study aimed to investigate polymerization kinetics and curing light transmittance of two series of experimental dental resin composites filled with 0–40 wt% of either 45S5 bioactive glass (BG) or a customized low-Na F-containing BG. Polymerization kinetics in 0.1-mm and 2-mm thick layers were investigated through real-time degree of conversion measurements using a Fourier transform infrared (FTIR) spectrometer. FTIR spectra were continuously collected at a rate of 2 s−1 during light-curing (1340 mW/cm2). Light transmittance through 2-mm thick composite specimens was measured using a UV–Vis spectrometer at a rate of 20 s−1. Unlike BG 45S5, which led to a dose-dependent reduction in the rate and extent of polymerization, the customized low-Na F-containing BG showed a negligible influence on polymerization. The reduction in light transmittance of experimental composites due to the addition of the low-Na F-containing BG did not translate into impaired polymerization kinetics. Additionally, the comparison of polymerization kinetics between 0.1-mm and 2-mm thick layers revealed that polymerization inhibition identified for BG 45S5 was not mediated by an impaired light transmittance, indicating a direct effect of BG 45S5 on polymerization reaction. A customized low-Na F-containing BG showed favourable behaviour for being used as a functional filler in light-curing dental resin composites.

scholarly journals Mechanical properties of resin composites containing bioactive glass and experimental nano zinc-silica complex

2021 ◽  
Vol 11 (Suppl. 1) ◽  
pp. 137-142
Author(s):  
Mehmet Gökberkkaan Demirel ◽  
Makbule Tuğba Tunçdemir
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Bioactive Glass ◽  
Resin Composite ◽  
Testing Machine ◽  
Control Sample ◽  
Dental Composite ◽  
Resin Composites ◽  
Nano Zinc

Aim: Secondary caries is an important problem in dental composite restoration, and nanoparticles are commonly added to the structures of resin composites to improve their antimicrobial properties. The aim of this study is to evaluate the mechanical properties of composite materials containing bioactive glass (BAG) and an experimental nano zinc-silica (NZS) complex. Methodology: An experimental resin composite containing 70 wt% filler was produced and used as a control sample. This experimental resin composite was then modified by adding different amounts of BAG (10%), NZS (10%), and both BAG and NZS (10% + 10%). NZS was synthesized in situ by milling zinc and silica to nanoscale level. Compressive strength and flexural strength were investigated using a universal testing machine. Data were analyzed using one-way ANOVA and the Tukey post-hoc test. Results: There were no statistically significant differences in compressive strength caused by the filler amount, but statistically significant changes were found in flexural strength. Although the addition of antimicrobial agents to resin composites reduces their physical properties, this is not a clinically unacceptable limit. Conclusion: NZS exhibits better mechanical properties than does BAG, but both materials can be used safely in restorative materials.   How to cite this article: Tunçdemir MT, Demirel MG. Mechanical properties of resin composites containing bioactive glass and experimental nano zinc-silica complex. Int Dent Res 2021;11(Suppl.1):137-42. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.21   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.  

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