Furtos Gabriel

Furtos Gabriel
Babeş-Bolyai University | UBB · Dept. of Dental Composite Materials

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58
Publications
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541
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Publications

Publications (58)
Article
Full-text available
The aim of the present study was to obtain experimental infiltration materials, intended for the treatment of dental white spots, and to investigate them. Two series of infiltrants (P1–P6)/(P1F–P6F) were obtained, based on different monomer mixtures, without/with glass filler (with fluoride release ability). Each infiltrant from the second series c...
Article
Full-text available
Various powders of graphene oxide (GO), GO with silver (GO-Ag) and zinc oxide (GO-ZnO) were obtained. The powders were silanized with (3-aminopropyl) triethoxysilane (APTES) aiming to be used, in a future stage, as additives in the hydraulic lime mortars composition. The powders were characterized by Fourier Transform Infrared Spectrometry (FTIR) a...
Article
Full-text available
Transformation of waste into resources is an important part of the circular economy. Nowadays, the recovery of materials in the most effective way is crucial for sustainable development. Composite materials offer great opportunities for product development and high performance in use, but their position in a circular economy system remains challeng...
Article
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Geopolymers based on fly ash are an emerging alternative to ordinary Portland cement, with a low impact on the environment and a potential to increase the sustainability of the concrete-based construction. Reported here is the design and investigation of new wood fiber reinforced geopolymer composites (WFRGC) based on fly ash and wood fiber (5–35 w...
Article
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The aim of this research was to develop new electrospun membranes (EMs) based on polycaprolactone (PCL) with or without metronidazole (MET)/nano-hydroxyapatite (nHAP) content. New nHAP with a mean diameter of 34 nm in length was synthesized. X-ray diffraction (XRD) and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR)...
Article
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In this work, the mechanical behaviour of composite materials consisting of fly ash-based geopolymer reinforced with wood fibres is investigated for compressive and flexural loadings. The gathered test data were used to calibrate constitutive models for the geopolymer, consisting of the exponential Drucker–Prager yield criterion coupled with the co...
Article
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In the EU there is a pressing need for the change of the current economy into a so-called circular economy in recent years. The rational management of natural resources and the use of waste materials are becoming more and more important. It is also supported by the growing ecological awareness of society, including the consciousness of sustainable...
Article
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The aim of this study was to evaluate the correlation between the percent of inorganic filler by weight (wt. %) and by volume (vol. %) of 11 flowable resin composites (FRCs) and their mechanical properties. To establish the correlation, the quantity of inorganic filler was determined by combustion and shape/size analyzed by SEM images. The compress...
Article
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Introduction This study aims to quantify and compare the amount of light that passes through seven different types of direct and indirect restorative materials comprising light-cured resin based composites (regular and bulk-fill), computer-aided design/computer-aided manufacturing (CAD/CAM) restoratives such as resin based composites, poly(methyl m...
Article
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The article discuss the possibility of using the system for coke oven wastewater treatment process that has been developed within the framework of the project: The innovative system for coke oven wastewater treatment and water recovery with the use of clean technologies — INNOWATREAT that has received funding from the Research Fund for Coal and Ste...
Article
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Fly ash-based geopolymers can be considered as a greener alternative to ordinary Portland cement, featuring comparable properties and cost yet with lower CO2 emissions. New wood fiber reinforced geopolymer composites with sand addition (WFSGC) have been synthesized at room temperature by mixing powder (fly ash, sand and randomly reinforced wood fib...
Article
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In this study, the radiopacity of chairside Computer-Aided Design-Computer-Aided Manufacturing (CAD-CAM) milling materials was evaluated in comparison with dental structures. 105 specimens of 7 different thicknesses from 5 different types of chairside CAD-CAM milling materials: feldspar ceramic, hybrid ceramic, lithium disilicate glass-ceramic, zir...
Article
The aim of this work was to reduce microleakage in giomer restorations by using innovative materials in both adhesive systems and light-cured dental giomer. Two adhesive systems with different primers were investigated. The innovative compounds in the primers were acrylic acid (AA)/itaconic acid (IA) copolymer modified with methacrylic groups and A...
Article
Surface modifications of thin films based on chitosan (Ch), pure Ch and either Ch/montmorillonite (MMT) or Ch/nanoclay composites, were characterised by infrared spectroscopy (ATR-FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Biomineralisation of the Ch-based materials without any pr...
Patent
The invention relates to a dental composition with anticariogenic effect, meant to be used for dental restoration and cavity protection in children. According to the invention, the composition comprises 20...24% organic phase consisting of 25...80% novel Bis-GMA-type oligomers in combination with 20...70% triethylene glycol dimethacrylate, 0.5...2%...
Article
Electrospun nanocomposite matrices based on poly(ε-caprolactone) (PCL), nano-hydroxyapatite (nHAp) and amoxicillin (AMX) were designed and investigated for dental applications. nHAp provides good biocompatibility, bioactivity, osteoconductivity, and osteoinductivity properties, and AMX, as antibiotic model, controls and/or reduces bacterial contami...
Article
Full-text available
The development of polymer and inorganic filler lead to new biocomposite materials with a wide range of applications in orthopedic and dental application. Biocomposites possess an excellent biocompatibility, biodegradability and superior mechanical properties. The inclusion of bioactive filler of hydroxyapatite, wollastonite glass-ceramics and bioa...
Article
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The ability of advanced dental restorative biomaterials to withstand to masticatory forces and permanent changes in the oral environment implies well balanced properties. The aim of this study is to comparatively assess hydrolysis and mechanical behaviour of three nanohybrid filled resin biocomposites with different polymeric matrix content (Experi...
Article
The aim of the present study was to obtain and to investigate nano forsterite and nano forsterite biocomposites for biomedical application. New self-curing forsterite biocomposites were obtained by mixing nano forsterite powder (5, 15, 30, 50, 70 wt %) with 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl]propane (bis-GMA) and triethyleneglyco...
Article
In the present study, the results of Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) studies of chitosan (Ch) with montmorillonite (MMT) or nanoclay are presented. MMT samples have been used without modification and after nanoclay surface modification. Composites of chitosan with montmorillonite samples were obtaine...
Article
Shear Bond Strength testing is one of the most common used tests for Orthodontics Adhesives. However, the standardizations of such procedures is quite difficult due to a large number of factors. While scientists are designing their studies in order to reduce errors, sometime they may find themselves in front of technical difficulties. A custom devi...
Article
In the present paper, the results of mechanical properties and atomic force microscopy studies of chitosan (Ch) with montmorillonite (MMT) or nano-clay are presented. The blends composed of chitosan (Ch) with montmorillonite (MMT) have been prepared as material designed for cosmetic industries and/or biomedical applications. Mechanical properties s...
Article
The structural properties, thermal behaviour and mechanical properties of composites of chitosan (Ch) with nanoclay (montmorillonite, MMT) and/or nanoclays after surface modification have been characterized using scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA) and a tensile tests. The microstructu...
Article
The root canal sealers have the most important role, being responsable for the final sealing of the tooth root. The novelty elements of this study are represented by the endodontic sealing materials developed-the basic monomer, the coloured bioactive glass, hydroxyapatite in combination with the various metal oxide (all obtained in the laboratory),...
Article
Full-text available
Bonding to root canal dentin may be difficult due to various factors: the structural characteristic of the root canal dentin, which is different from that of the coronal dentin; the presence of the organic tissue of the dental pulp inside the root canal, which has to be removed during the cleaning-shaping of the root canal system; the smear-layer r...
Conference Paper
Objective: The aim of this study was to analyze the marginal sealing in cavities restored with giomer in combination with three different adhesive systems by dye penetration (2% methylene blue) and scanning electron microscopy(SEM). Method: Thirty six box-type Class V standardized cavities were prepared on the facial and oral surfaces of eighteen...
Article
Full-text available
Purpose The retentive strength of two self-adhesive resin cements used for the cementation of fiber posts into root canals filled with methacrylate-based sealer and core material (Resilon) was evaluated using the thin-slices push-out test on human molars. Materials and methods RelyX Fiber Posts #3 (3M ESPE, Seefeld, Germany) were luted with RelyX...
Article
Full-text available
A series of new biomedical resin composites based on 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl]propane/triethyleneglycol dimethacrylate resin reinforced with alkaline resistant (AR) glass fibers and BaSO4 powder in different ratios were prepared. The mechanical properties—that is, compressive strength (CS), flexural strength (FS), and f...
Article
Full-text available
Although total joint replacement surgery has become common in recent years, problems due to bacterial infection remain a significant complication following this procedure. One approach in our study was to obtain a self-cured bone cement based on hydroxyapatite with nanosilver (Hap-Ag) and ZrO2 and polymer matrix based on 2,2-bis[4-(2-hydroxy-3-meth...
Article
Full-text available
The aim of this study was to obtain and investigate new biomedical glass fiber resin cements with improved mechanical properties and radiopacity, using alkaline-resistant (AR) glass fibers. New light-curing, self-curing, and dual-curing resin cements were obtained from AR glass fibers and BaSO4 powder mixed with 2,2-bis[4-(2-hydroxy-3-methacryloylo...
Article
Radiopacity is a requirement for dental restorative materials that permits evaluation of the integrity and adaptation over time to the restoration of the tooth structure. This work was to investigate amount of fillers and radiopacity of flowable resin composites using scanned radiograph images. Radiographs of samples (8 mm diameter and 1 mm thickne...
Article
Full-text available
The aim of this study is to investigate the reinforcing effect of woven and unidirectional glass fibers and the effect of post-curing on the flexural strength and flexural modulus of glass fiber-reinforced composites. A series of composites containing 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl]propane and triethyleneglycol dimethacrylate...
Article
Full-text available
Digital radiography was used to measure the radiopacity of 18 resin cements to determine the influence of inorganic filler content on radiopacity. Four disk specimens (n=4) of each light-curing cement were digitally radiographed alongside an aluminum step wedge using an intraoral sensor (XIOS Plus, Sirona, Germany), and their mean gray value measur...
Article
Full-text available
A series of six new experimental light-curing dental composites based on two Bis-GMA-type oligomers, quartz and nano-fluorohydroxyapatite (nano-FHAP), in different ratios, were prepared. The paper refers to the characterization of organic and inorganic phases from the uncured composite pastes and determination of the properties of the light-cured c...
Article
Full-text available
A series of six experimental dental copolymers of different compositions has been prepared from new synthesized Bis-GMA-type oligomers and triethyleneglicol dimethacrylate by photochemical initiation of polymerization. The paper studies the influence of the chemical composition upon the extent of polymerization, mechanical properties and water sorp...
Article
The aim of this work was to investigate the morphology and to determine the roughness of a series of three new experimental resin-based composite materials containing different inorganic fillers using the AFM technique. Dental composites with photochemical initiation of polymerisation were prepared using the same resin consisting of synthesised aro...
Article
The radiopacity of zinc phosphate, polycarboxylate and glass ionomer dental luting materials was determined and the values were compared with those of tooth substrates. The radiographs of the 2 mm thick specimens were taken together with tooth slices and pure aluminum step wedges. The radiographic density of the specimens was measured using a densi...
Article
The purpose of this study was to measure water sorption and solubility of some experimental UDMA-based resin composite sealants. The experimental resin composites consisted of a UDMA resin system and inorganic filler based on quartz and sodium fluoride. Samples of resin composites were stored in bidistilled water over a 21-day period. The results o...
Article
The aim of this study was to establish the conditions to synthesize hydroxyapatite (HAP) with composition and crystalline degree, comparable to bone mineral tissue, able to enssure a good adhesion to dental tissue. We used, in our experiments, two systems of experimental conditions for future technological applications. A significant decrease of th...
Article
Recent studies have shown that composite resins with non-impregnated filler have a higher probability of elution-in-water and water-uptake than the resins with a silane coupling agent-impregnated filler. This coupling agent may induce an interaction between matrix and filler and it may protect the surface of the filler against elution in water. The...
Article
There was prepared a series of 12 experimental fiber reinforced composites (FRCs) based on continuous unidirectional bundles of E glass fibers and resins consisting of BiS-GMA0 monomer- 2,2-bis[4-(2-hydroxy-3- methacryloyloxypropoxy) phenylj-propane-, Bis-GMA0-2 superior oligomers having 81 mol % Bis-GMAo monomer, 17 mol % Bis-GMA1 dimer and 2 mol...
Article
Full-text available
The purpose of the present study was to synthesize and evaluate a series of two inorganic fillers based on oxides of elements with high atomic weight, owing to radiopaque effects, used for dental materials. The obtained inorganic fillers were characterized by BET specific surface. The crystalline phases were identified using X-ray diffraction analy...
Article
Full-text available
The fluoride release from dental composites has reported as an important factor in the inhibition of dental caries. The aim of this study was to determine the amount of fluoride release from two resin composites with different powder/liquid ratio. The experimental resin composites consisted of a resin system and inorganic filler based on quartz and...
Article
A series of glasses of different chemical compositions, based on oxides with radiopacifier effects such as BaO, SrO, Yb2O3, ZrO2, ZnO used as filling in formulation of some opaque dental polymeric composites to X-rays, were prepared. The structure of the glasses was investigated by X-ray diffraction. Two series of fillers formed out of a single gla...
Article
The acrylic acid/itaconic acid copolymers, respectively the acrylic acid/maleic acid copolymers were synthesized. Based on them, new polyelectrolytic systems modified with compatible monomers polymerizable in situ were prepared. New compositions of superficially active glasses based on oxides with radiopacifier effects (SrO, ZnO, Yb2O3) were synthe...
Article
In the present work a mixture of oligomers called (modified bis-GMA)0-2 has been synthesized using the mixture of three components bis-GMA0-2 having 83 mol % bis-GMA0 monomer- 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]-pmpane-, 16 mol % bis-GMA1 dimer, 1 mol % bis-GMA2 and methacryl chloride. The (modified bis-GMA)0-2 oligomers mixture,...
Article
In the present work, a mixture of oligomers called (modified bis-GWA)(0-2) has been synthesized using the mixture of three components bis-GMA(0-2) having 83 mol % bis-GMA(0) nionomer- 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy) phenyl]-propane-, 16 mol % bis-GMA(1) dimer, 1 mol % bis-GMA(2) and methacryl chloride. The (modified bis-GMA)(0-2) oli...
Article
Full-text available
INTRODUCTION: The studies of literatures are based on finding some ways of improvement to the properties of composites by changing the chemical nature the size of particles, the ratio between the base components(1-3) The properties of composites depend of: the composition of the inorganic phase and organic phase; the way the two components are coup...
Conference Paper
Objectives: The aim of this study was to analyse the radiopacity of some glass/carbon fibers and metal post and to compare with the radiopacity of human enamel and dentin. Materials and Methods: Four disks of each post (21 materials), mesiodistal sections of human molar (10.01 mm thickness) and aluminium step wedges were radiographed on dental X-...

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Project (1)
Project
COST Action CA15216 European Network of Bioadhesion Expertise: Fundamental Knowledge to Inspire Advanced Bonding Technologies http://www.cost.eu/COST_Actions/ca/CA15216