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Wang Y, Jiang X, Yang B, Wei S, Chen Y, Yan J, Zhuang Z, Yu Y. Heterointerface of Monodispersed Ultrathin-MnO 2@Amorphous Carbon to Attain Durable Lattice Oxygen Redox Chemistry through Creation of Dual Lattice Oxygens. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39418081 DOI: 10.1021/acsami.4c12071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
Lattice oxygen (OL) redox chemistry is a key to alleviating the energy and environmental crisis, but it faces challenges in activating the OL while ensuring structural stability. We disclosed herein that engineering a heterogeneous interface between ultrathin oxide and amorphous carbon can attain the durable OL redox chemistry without introducing catalytically impure sites. To this end, we proposed a green strategy to grow ∼3.9 nm-thickness wrinkled δ-MnO2 nanosheets that are rich in defects and are vertically aligned on amorphous carbon spheres. Experiments and calculations reveal that the electrons can easily migrate from the amorphous carbon to MnO2 at the δ-MnO2@C heterointerface. The heterogeneous interfaces can not only regulate the Mn-O bond and create oxygen defects in δ-MnO2 but also introduce lattice oxygen with varying reactivities. Specifically, the δ-MnO2@C structure carries more activated lattice oxygen that contributes to the enhanced activity on catalytic oxidation of bioderived 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), with a high FDCA formation rate of 1759 μmol gcat-1 h-1 and a high selectivity of 95%. The heterogeneous interface of MnO2@C also brings inert lattice oxygen, so that it manifests high structural stability during the oxidation reactions. This work deepens the fundamental understandings in the engineering of lattice oxygen for durable lattice oxygen redox chemistry and showcases an effective interface technique in creating advanced catalysts for clean sustainable energy.
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Affiliation(s)
- Yaping Wang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Xingpeng Jiang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Bixia Yang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Siyuan Wei
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Yixie Chen
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Jiawei Yan
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Zanyong Zhuang
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
| | - Yan Yu
- College of Materials Science and Engineering, Fuzhou University, New Campus, Minhou, Fujian 350108, China
- Key Laboratory of Advanced Materials Technologies, Fuzhou University, Fuzhou 350108, China
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Zhang S, Zhang X, Bai H, Wang K. Resource utilization of stone waste and loess to prepare grouting materials. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120452. [PMID: 38401503 DOI: 10.1016/j.jenvman.2024.120452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/12/2024] [Accepted: 02/20/2024] [Indexed: 02/26/2024]
Abstract
Loess, a terrestrial clastic sediment, is formed essentially by the accumulation of wind-blown dust, while stone waste (SW) is an industrial waste produced during stone machining. Utilising loess and SW to prepare environmentally-friendly supplementary cementitious materials can not only address environmental issues caused by solid waste landfills but also meet the demand of reinforcement of coal-seam floor aquifer for grouting materials. In this paper, the effects of the loess/SW mass ratio and calcination temperature on the transformation of calcined products are investigated and their pozzolanic activities are evaluated. The workability, environmental impact and cost of grouting materials based on cement and calcined products are also assessed. Experimental results reveal that higher temperatures favour the formation of free lime and periclase, which tend to be involved in solid-state reactions. Higher temperature and loess/SW mass ratio strengthens the diffraction peaks of dodecalcium hepta-aluminate (C12A7), dicalcium ferrite (C2F) and dicalcium silicate (C2S). The clay minerals in loess become completely dehydroxylated before 825 °C, generating amorphous SiO2 and Al2O3. Covalent Si-O bonds are interrupted and that disordered silicate networks are generated in the calcined products, which is confirmed by the increased strength of the Si29 resonance region at -60 ppm to -80 ppm. Although co-calcined loess and SW contain the most four-fold aluminium at 950 °C, recrystallisation depresses the pozzolanic activity. Hence, the loess/SW sample designated LS2-825 exhibits the better hydration activity. Additionally, grouting materials composed of cement and LS2-825 exhibit good setting times, fluidity, strength and a low carbon footprint in practical engineering applications, and they also provide the additional benefit of being cost effective.
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Affiliation(s)
- Shiyu Zhang
- School of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Xiaoqiang Zhang
- School of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
| | - Hao Bai
- School of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
| | - Kai Wang
- School of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
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Fortis SP, Batrinou A, Georgatzakou HT, Tsamesidis I, Alvanidis G, Papageorgiou EG, Stamoulis K, Gkiliopoulos D, Pouroutzidou GK, Theocharidou A, Kontonasaki E, Kriebardis AG. Effect of silica-based mesoporous nanomaterials on human blood cells. Chem Biol Interact 2024; 387:110784. [PMID: 37939894 DOI: 10.1016/j.cbi.2023.110784] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 10/18/2023] [Accepted: 10/25/2023] [Indexed: 11/10/2023]
Abstract
Different mesoporous nanomaterials (MSNs) are constantly being developed for a range of therapeutic purposes, but they invariably interact with blood components and may cause hazardous side effects. Therefore, when designing and developing nanoparticles for biomedical applications, hemocompatibility should be one of the primary goals to assess their toxicity at the cellular level of all blood components. The aim of this study was to evaluate the compatibility of human blood cells (erythrocytes, platelets, and leukocytes) after exposure to silica-based mesoporous nanomaterials that had been manufactured using the sol-gel method, with Ca and Ce as doping elements. The viability of lymphocytes and monocytes was unaffected by the presence of MSNs at any concentration. However, it was found that all nanomaterials, at all concentrations, reduced the viability of granulocytes. P-selectin expression of all MSNs at all concentrations was statistically significantly higher in platelet incubation on the first day of storage (day 1) compared to the control. When incubated with MSNs, preserved platelets displayed higher levels of iROS at all MSNs types and concentrations examined. Ce-containing MSNs presented a slightly better hemocompatibility, although it was also dose dependent. Further research is required to determine how the unique characteristics of MSNs may affect various blood components in order to design safe and effective MSNs for various biomedical applications.
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Affiliation(s)
- Sotirios P Fortis
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), Egaleo, Greece
| | - Anthimia Batrinou
- Department of Food Science and Technology, University of West Attica, 12243, Egaleo, Greece
| | - Hara T Georgatzakou
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), Egaleo, Greece
| | - Ioannis Tsamesidis
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Grigorios Alvanidis
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), Egaleo, Greece
| | - Effie G Papageorgiou
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), Egaleo, Greece
| | | | - Dimitrios Gkiliopoulos
- Laboratory of Chemical and Environmental Technology, School of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgia K Pouroutzidou
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece; School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Anna Theocharidou
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eleana Kontonasaki
- Department of Prosthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | - Anastasios G Kriebardis
- Laboratory of Reliability and Quality Control in Laboratory Hematology (HemQcR), Department of Biomedical Sciences, School of Health & Caring Sciences, University of West Attica (UniWA), Egaleo, Greece.
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de Souza JR, Kukulka EC, Araújo JCR, Campos TMB, do Prado RF, de Vasconcellos LMR, Thin GP, Borges ALS. Electrospun polylactic acid scaffolds with strontium- and cobalt-doped bioglass for potential use in bone tissue engineering applications. J Biomed Mater Res B Appl Biomater 2023; 111:151-160. [PMID: 35950464 DOI: 10.1002/jbm.b.35141] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 11/11/2022]
Abstract
The development of nanoscale biomaterials associated with polymers has been growing over the years, due to their important structural characteristics for applications in biological systems. The present study aimed to produce and test polymeric scaffolds composed of polylactic acid (PLA) fibers associated with a 58S bioglass doped with therapeutic ions for use in tissue engineering. Three 58S Bioglass was obtained by the sol-gel route, pure and doped with 5% strontium and cobalt ions. Solutions of 7% PLA was used as control and added the three different bioglass, 4% of 58S bioglass (PLA-BG), 4% bioglass-doped strontium (PLA-BGSr) and 4% bioglass-doped cobalt (PLA-BGCo). Scaffolds were produced through electrospinning process, and was characterized chemical and morphologically. The in vitro tests were performed using mesenchymal cells cultures from femurs of nine rats, grown in osteogenic supplemented total culture medium. After osteoblastic differentiation induction cell viability, alkaline phosphatase activity, total protein content quantification, and visualization of mineralization nodule tests were performed. Analysis of normal distribution used the Shapiro-Wilk test (nanofibers diameter and biological assay). Data were compared using the Kruskal-Wallis nonparametric test (p = 0.05). The bioglasses produced proved to be free of nitrate, chlorinated and nano-sized, with effective incorporation of therapeutic ions in their structure. All materials showed cell viability (>70%), total protein production, and alkaline phosphatase activity. It was possible to develop polylactic acid scaffolds associated with 58S bioglass doped with therapeutic ions without cytotoxicity. Scaffolds characteristics appear to sustain its application in bone tissue engineering.
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Affiliation(s)
- Joyce Rodrigues de Souza
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
| | - Elisa Camargo Kukulka
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
| | - Juliani Caroline Ribeiro Araújo
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
| | - Tiago Moreira Bastos Campos
- Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, São José dos Campos, São Paulo, Brazil
| | - Renata Falchete do Prado
- Department of Social Dentistry and Children's Clinic, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
| | - Luana Marotta Reis de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
| | - Gilmar Patrocínio Thin
- Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, São José dos Campos, São Paulo, Brazil
| | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), Institute of Science and Technology of São José dos Campos, São Paulo State University (UNESP), São José dos Campos, São Paulo, Brazil
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Zhang X, Zhang M, Lin J. Effect of pH on the In Vitro Degradation of Borosilicate Bioactive Glass and Its Modulation by Direct Current Electric Field. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7015. [PMID: 36234355 PMCID: PMC9570734 DOI: 10.3390/ma15197015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Controlled ion release and mineralization of bioactive glasses are essential to their applications in bone regeneration. Tuning the chemical composition and surface structure of glasses are the primary means of achieving this goal. However, most bioactive glasses exhibit a non-linear ion release behavior. Therefore, modifying the immersion environment of glasses through external stimuli becomes an approach. In this study, the ion release and mineralization properties of a borosilicate bioactive glass were investigated in the Tris buffer and K2HPO4 solutions with different pH. The glass had a faster ion release rate at a lower pH, but the overly acidic environment was detrimental to hydroxyapatite production. Using a direct current (DC) electric field as an external stimulus, the pH of the immersion solution could be modulated within a narrow range, thereby modulating ion release from the glass. As a result, significant increases in ion release were observed after three days, and the development of porous mineralization products on the glass surface after six days. This study demonstrates the effectiveness of the DC electric field in modulating the ion release of the bioactive glass in vitro and provides a potential way to regulate the degradation of the glass in vivo.
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Affiliation(s)
- Xuanyu Zhang
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Minhui Zhang
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Jian Lin
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
- Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Shanghai 200092, China
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Heat Treatment of Geopolymer Samples Obtained by Varying Concentration of Sodium Hydroxide as Constituent of Alkali Activator. Gels 2022; 8:gels8060333. [PMID: 35735677 PMCID: PMC9222481 DOI: 10.3390/gels8060333] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/19/2022] [Accepted: 05/23/2022] [Indexed: 12/04/2022] Open
Abstract
In this paper, raw natural metakaolin (MK, Serbia) clay was used as a starting material for the synthesis of geopolymers for thermal treatment. Metakaolin was obtained by calcination of kaolin at 750 °C for 1 h while geopolymer samples were calcined at 900 °C, which is the key transition temperature. Metakaolin was activated by a solution of NaOH of various concentrations and sodium silicate. During the controlled heat treatment, the geopolymer samples began to melt slightly and coagulate locally. The high-temperature exposure of geopolymer samples (900 °C) caused a significant reduction in oxygen, and even more sodium, which led to the formation of a complex porous structure. As the concentration of NaOH (6 mol dm−3 and 8 mol dm−3) increased, new semi-crystalline phases of nepheline and sanidine were formed. Thermal properties were increasingly used to better understand and improve the properties of geopolymers at high temperatures. Temperature changes were monitored by simultaneous use of thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The loss of mass of the investigated samples at 900 °C was in the range of 8–16%. Thermal treatment of geopolymers at 900 °C did not have much effect on the change in compressive strength of investigated samples. The results of thermal treatment of geopolymers at 900 °C showed that this is approximately the temperature at which the structure of the geopolymer turns into a ceramic-like structure. All investigated properties of the geopolymers are closely connected to the precursors and the constituents of the geopolymers.
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Effect of Ce-doped bioactive glass/collagen/chitosan nanocomposite scaffolds on the cell morphology and proliferation of rabbit’s bone marrow mesenchymal stem cells-derived osteogenic cells. J Genet Eng Biotechnol 2022; 20:33. [PMID: 35192077 PMCID: PMC8864049 DOI: 10.1186/s43141-022-00302-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 01/15/2022] [Indexed: 12/17/2022]
Abstract
Background Cerium-containing materials have wide applications in the biomedical field, because of the mimetic catalytic activities of cerium. The study aims to deeply estimate the biocompatibility of different scaffolds based on Ce-doped nanobioactive glass, collagen, and chitosan using the first passage of rabbit bone marrow mesenchymal stem cells (BM-MSCs) directed to osteogenic lineage by direct and indirect approach. One percentage of glass filler was used (30 wt. %) in the scaffold, while the percentage of CeO2 in the glass was ranged from 0 to 10 mol. %. Cytotoxicity was evaluated by monitoring of cell morphological changes and reduction in cell proliferation activity of BMMSCs maintained under osteogenic condition using proliferation assays, MTT assay for the direct contact of cells/scaffolds twice in a week, trypan blue and hemocytometer cell counting for indirect contact of cells/scaffolds extracts at day 7. Cell behaviors growth, morphology characteristics were monitored daily under a microscope and cell counting were conducted after 1 week of the incubation of the cells with the extracts of the four composite scaffolds in the osteogenic medium at the end of the week. Results Showed that at 24 h after direct contact with composite scaffold, all scaffolds showed proliferation of cells > 50% and increased in cell density on day 7. The scaffold of the highest percentage of CeO2 in bioactive glass nanoparticles (sample CL/CH/C10) showed the lowest inhibition of cell proliferation (< 25%) at day 7. Moreover, the indirect cell viability test showed that all extracts from the four composite scaffolds did not demonstrate a toxic effect on the cells (inhibition value < 25%). Conclusion The addition of CeO2 to the glass composition improved the biocompatibility of the composite scaffold for the proliferation of rabbit bone marrow mesenchymal stem cells directed to osteogenic lineage. Supplementary Information The online version contains supplementary material available at 10.1186/s43141-022-00302-x.
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Superparamagnetic and highly bioactive SPIONS/bioactive glass nanocomposite and its potential application in magnetic hyperthermia. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2022; 135:112655. [DOI: 10.1016/j.msec.2022.112655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 12/16/2021] [Accepted: 01/05/2022] [Indexed: 11/18/2022]
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Zhu L, Li J, Dong Y. Effect of mesoporous bioactive glass on odontogenic differentiation of human dental pulp stem cells. PeerJ 2021; 9:e12421. [PMID: 34900414 PMCID: PMC8621711 DOI: 10.7717/peerj.12421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 10/11/2021] [Indexed: 01/09/2023] Open
Abstract
Healthy pulp tissue plays an important role in normal function and long-term retention of teeth. Mesoporous bioactive glass (MBG) as a kind of regenerative biomaterials shows the potential in preserving the vital pulp. In this study, MBG prepared by organic template method combined with sol-gel method were used in human dental pulp cell culture and ectopic mineralization experiment. Real-Time PCR was used to explore its ability to induce odontogenic differentiation of dental pulp cells. MBG and rat crowns were implanted under the skin of nude mice for 4 weeks to observe the formation of pulp dentin complex. We found that MBG can release Si and Ca ions and has a strong mineralization activity in vitro. The co-culture of MBG with human dental pulp cells promoted the expression of DMP-1 (dentin matrix protein-1) and ALP (alkalinephosphatase) without affecting cell proliferation. After 4 weeks of subcutaneous implantation in nude mice, the formation of hard tissue with regular structure under the material could be seen, and the structure was similar to dentin tubules. These results indicate that MBG can induce the differentiation of dental pulp cells and the formation of dental pulp-dentin complex and has the potential to promote the repair and regeneration of dental pulp injuries.
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Affiliation(s)
- Lin Zhu
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Jingyi Li
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yanmei Dong
- Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, China
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Effect of Artemisinin-Loaded Mesoporous Cerium-Doped Calcium Silicate Nanopowder on Cell Proliferation of Human Periodontal Ligament Fibroblasts. NANOMATERIALS 2021; 11:nano11092189. [PMID: 34578505 PMCID: PMC8465982 DOI: 10.3390/nano11092189] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 01/31/2023]
Abstract
Ion doping has rendered mesoporous structures important materials in the field of tissue engineering, as apart from drug carriers, they can additionally serve as regenerative materials. The purpose of the present study was the synthesis, characterization and evaluation of the effect of artemisinin (ART)-loaded cerium-doped mesoporous calcium silicate nanopowders (NPs) on the hemocompatibility and cell proliferation of human periodontal ligament fibroblasts (hPDLFs). Mesoporous NPs were synthesized in a basic environment via a surfactant assisted cooperative self-assembly process and were characterized using Scanning Electron Microscopy (SEM), X-ray Fluorescence Spectroscopy (XRF), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction Analysis (XRD) and N2 Porosimetry. The loading capacity of NPs was evaluated using Ultrahigh Performance Liquid Chromatography/High resolution Mass Spectrometry (UHPLC/HRMS). Their biocompatibility was evaluated with the MTT assay, and the analysis of reactive oxygen species was performed using the cell-permeable ROS-sensitive probe 2′,7′-dichlorodihydrofluorescein diacetate (H2DCFDA). The synthesized NPs presented a mesoporous structure with a surface area ranging from 1312 m2/g for undoped silica to 495 m2/g for the Ce-doped NPs, excellent bioactivity after a 1-day immersion in c-SBF, hemocompatibility and a high loading capacity (around 80%). They presented ROS scavenging properties, and both the unloaded and ART-loaded NPs significantly promoted cell proliferation even at high concentrations of NPs (125 μg/mL). The ART-loaded Ce-doped NPs with the highest amount of cerium slightly restricted cell proliferation after 7 days of culture, but the difference was not significant compared with the control untreated cells.
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Nguyen TT, Lin YJ, Lin ZX, Tai HC, Tsai HY, Chen JR, Ngai EY. Enhanced friction and shock sensitivities of hexachlorodisilane hydrolyzed deposit mixed with KOH. J Loss Prev Process Ind 2021. [DOI: 10.1016/j.jlp.2021.104455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pouroutzidou GK, Liverani L, Theocharidou A, Tsamesidis I, Lazaridou M, Christodoulou E, Beketova A, Pappa C, Triantafyllidis KS, Anastasiou AD, Papadopoulou L, Bikiaris DN, Boccaccini AR, Kontonasaki E. Synthesis and Characterization of Mesoporous Mg- and Sr-Doped Nanoparticles for Moxifloxacin Drug Delivery in Promising Tissue Engineering Applications. Int J Mol Sci 2021; 22:E577. [PMID: 33430065 PMCID: PMC7827177 DOI: 10.3390/ijms22020577] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/30/2020] [Accepted: 01/04/2021] [Indexed: 02/07/2023] Open
Abstract
Mesoporous silica-based nanoparticles (MSNs) are considered promising drug carriers because of their ordered pore structure, which permits high drug loading and release capacity. The dissolution of Si and Ca from MSNs can trigger osteogenic differentiation of stem cells towards extracellular matrix calcification, while Mg and Sr constitute key elements of bone biology and metabolism. The aim of this study was the synthesis and characterization of sol-gel-derived MSNs co-doped with Ca, Mg and Sr. Their physico-chemical properties were investigated by X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray analysis (SEM/EDX), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray fluorescence spectroscopy (XRF), Brunauer Emmett Teller and Brunauer Joyner Halenda (BET/BJH), dynamic light scattering (DLS) and ζ-potential measurements. Moxifloxacin loading and release profiles were assessed with high performance liquid chromatography (HPLC) cell viability on human periodontal ligament fibroblasts and their hemolytic activity in contact with human red blood cells (RBCs) at various concentrations were also investigated. Doped MSNs generally retained their textural characteristics, while different compositions affected particle size, hemolytic activity and moxifloxacin loading/release profiles. All co-doped MSNs revealed the formation of hydroxycarbonate apatite on their surface after immersion in simulated body fluid (SBF) and promoted mitochondrial activity and cell proliferation.
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Affiliation(s)
- Georgia K. Pouroutzidou
- School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (G.K.P.); (I.T.)
| | - Liliana Liverani
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (L.L.); (A.R.B.)
| | - Anna Theocharidou
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
| | - Ioannis Tsamesidis
- School of Physics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (G.K.P.); (I.T.)
- Pharmadev, UMR 152, Université de Toulouse, IRD, UPS, 31400 Toulouse, France
| | - Maria Lazaridou
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Evi Christodoulou
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Anastasia Beketova
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
| | - Christina Pappa
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Konstantinos S. Triantafyllidis
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
- Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece
| | - Antonios D. Anastasiou
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M1 3AL, UK;
| | - Lambrini Papadopoulou
- School of Geology, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - Dimitrios N. Bikiaris
- School of Chemistry, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (M.L.); (E.C.); (C.P.); (K.S.T.); (D.N.B.)
| | - Aldo R. Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany; (L.L.); (A.R.B.)
| | - Eleana Kontonasaki
- School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.T.); (A.B.)
- Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 57001 Thessaloniki, Greece
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13
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Strontium-Modified Scaffolds Based on Mesoporous Bioactive Glasses/Polyvinyl Alcohol Composites for Bone Regeneration. MATERIALS 2020; 13:ma13235526. [PMID: 33287381 PMCID: PMC7731299 DOI: 10.3390/ma13235526] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 12/12/2022]
Abstract
In the search of a new biomaterial for the treatment of bone defects resulting from traumatic events, an osteoporosis scenario with bone fractures, tumor removal, congenital pathologies or implant revisions for infection, we developed 3D scaffolds based on mesoporous bioactive glasses (MBGs) (85 − x)SiO2–5P2O5–10CaO–xSrO (x = 0, 2.5 and 5 mol.%). The scaffolds with meso-macroporosity were fabricated by pouring a suspension of MBG powders in polyvinyl alcohol (PVA) into a negative template of polylactic acid (PLA), followed by removal of the template by extraction at low temperature. SrO-containing MBGs exhibited excellent properties for bone substitution including ordered mesoporous structure, high textural properties, quick in vitro bioactive response in simulated body fluid (SBF) and the ability of releasing concentrations of strontium ions able to stimulate expression of early markers of osteoblastic differentiation. Moreover, the direct contact of MC3T3-E1 pre-osteoblastic cells with the scaffolds confirmed the cytocompatibility of the three compositions investigated. Nevertheless, the scaffold containing 2.5% of SrO induced the best cellular proliferation showing the potential of this scaffold as a candidate to be further investigated in vitro and in vivo, aiming to be clinically used for bone regeneration applications in non-load bearing sites.
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14
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Marsh AC, Zhang Y, Poli L, Hammer N, Roch A, Crimp M, Chatzistavrou X. 3D printed bioactive and antibacterial silicate glass-ceramic scaffold by fused filament fabrication. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111516. [PMID: 33255072 DOI: 10.1016/j.msec.2020.111516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 07/28/2020] [Accepted: 09/01/2020] [Indexed: 01/14/2023]
Abstract
The fused filament fabrication (FFF) technique was applied for the first time to fabricate novel 3D printed silicate bioactive and antibacterial Ag-doped glass-ceramic (Ag-BG) scaffolds. A novel filament consisting primarily of polyolefin and Ag-BG micro-sized particles was developed and its thermal properties characterized by thermogravimetric analysis (TGA) to define the optimum heat treatment with minimal macrostructural deformation during thermal debinding and sintering. Structural characteristics of the Ag-BG scaffolds were evaluated from macro- to nanoscale using microscopic and spectroscopic techniques. The compressive strength of the Ag-BG scaffolds was found to be in the range of cancellous bone. Bioactivity of the 3D printed Ag-BG scaffolds was evaluated in vitro through immersion in simulated body fluid (SBF) and correlated to the formation of an apatite-like phase. Methicillin-resistant Staphylococcus aureus (MRSA) inoculated with the Ag-BG scaffolds exhibited a significant decrease in viability underscoring a potent anti-MRSA effect. This study demonstrates the potential of the FFF technique for the fabrication of bioactive 3D silicate scaffolds with promising characteristics for orthopedic applications.
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Affiliation(s)
- Adam C Marsh
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Yaozhong Zhang
- Electrical & Computer Engineering, Michigan State University, East Lansing, MI, USA
| | - Lucrezia Poli
- Fraunhofer USA Center for Coatings and Diamond Technologies CCD, East Lansing, MI, USA
| | - Neal Hammer
- Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, MI, USA
| | - Aljoscha Roch
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA; Electrical & Computer Engineering, Michigan State University, East Lansing, MI, USA
| | - Martin Crimp
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Xanthippi Chatzistavrou
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA.
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15
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New sol-gel-derived magnetic bioactive glass-ceramics containing superparamagnetic hematite nanocrystals for hyperthermia application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 120:111692. [PMID: 33545853 DOI: 10.1016/j.msec.2020.111692] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/22/2020] [Accepted: 10/30/2020] [Indexed: 12/31/2022]
Abstract
Although the three main phases of iron oxide - hematite, maghemite, and magnetite - exhibit superparamagnetic properties at the nanoscale, only maghemite and magnetite phases have been explored in magnetic bioactive glass-ceramics aimed at applications in cancer treatment by hyperthermia. In this work, it is reported for the first time the superparamagnetic properties of hematite nanocrystals grown in a 58S bioactive glass matrix derived from sol-gel synthesis. The glass-ceramics are based on the (100-x)(58SiO2-33CaO-9P2O5)-xFe2O3 system (x = 10, 20 and 30 wt%). A thermal treatment leads to the growth of hematite (α-Fe2O3) nanocrystals, conferring superparamagnetic properties to the glass-ceramics, which is enough to produce heat under an external alternating magnetic field. Besides, the crystallization does not inhibit materials bioactivity, evidenced by the formation of calcium phosphate onto the glass-ceramic surface upon soaking in simulated body fluid. Moreover, their cytotoxicity is similar to other magnetic bioactive glass-ceramics reported in the literature. Finally, these results suggest that hematite nanocrystals' superparamagnetic properties may be explored in multifunctional glass-ceramics applied in bone cancer treatment by hyperthermia allied to bone regeneration.
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16
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Delpino GP, Borges R, Zambanini T, Joca JFS, Gaubeur I, de Souza ACS, Marchi J. Sol-gel-derived 58S bioactive glass containing holmium aiming brachytherapy applications: A dissolution, bioactivity, and cytotoxicity study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 119:111595. [PMID: 33321639 DOI: 10.1016/j.msec.2020.111595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 01/06/2023]
Abstract
Bioactive glasses containing rare earth elements have been proposed as promising candidates for applications in brachytherapy of bone cancer. However, their safety relies on a proper dissolution to avoid radioactive materials in the human body, and desirable bioactive properties to regenerate the bone defect caused by the tumor. In this work, we proposed a new series of sol-gel-derived bioactive glasses containing holmium oxide, based on the system (100-x)(58SiO2-33CaO-9P2O5)-xHo2O3 (x = 1.25, 2.5 and 5 wt%). The glasses were characterized regarding their dissolution behavior, bioactivity, and cytotoxicity with pre-osteoblastic cells. Also, in the dissolution experiments, the Arrhenius and Eyring equations were used to obtain some thermodynamic properties of glass dissolution. The results evidenced that the addition of holmium ions in the glass structure decreased the energy barrier of hydrolysis reactions, which favors glass dissolution in an early-stage. However, in the long-term, the strength of Si-O-Ho bonds may be the cause of more stable dissolution. Besides, glasses containing holmium were as bioactive as the 58S bioactive glasses, a highly bioactive composition. Cytotoxicity results showed that all glasses were not cytotoxic, and the composition containing 5 wt.% of Ho2O3 enhanced cell viability. Finally, these results suggest that these glasses are suitable materials for brachytherapy applications due to their proper dissolution behavior, high bioactivity, and high cell viability.
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Affiliation(s)
| | - Roger Borges
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | - Telma Zambanini
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | | | - Ivanise Gaubeur
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil
| | | | - Juliana Marchi
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, Brazil.
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17
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Precipitation of silver nanoparticle within silicate glassy matrix via Nd:YAG laser for biomedical applications. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108958] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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18
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Okhrimenko DV, Nielsen CF, Lakshtanov LZ, Dalby KN, Johansson DB, Solvang M, Deubener J, Stipp SLS. Surface Reactivity and Dissolution Properties of Alumina-Silica Glasses and Fibers. ACS APPLIED MATERIALS & INTERFACES 2020; 12:36740-36754. [PMID: 32663394 DOI: 10.1021/acsami.0c09362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The ability of bulk glass and fibers to react in aqueous solution, with organic polymers and coupling agents, depends on the surface charge, reactivity, and adsorption properties of the glass surface, i.e. the character and density of surface -OH groups, whereas glass and fiber chemical stability and biosolubility depend on the resistance to dissolution. If glass dissolution products are accumulated in a media, they can change the surface properties by specific adsorption. We determined the -OH surface concentration, reactivity, adsorption, and dissolution properties of aluminosilicate glasses containing various modifiers and compared the results with the behavior of complex mineral wool fibers. Using proton consumption and element release from batch surface titration experiments, over the range 5 < pH < 10, surface -OH adsorption properties were modeled with the FITEQL program. During titration, network modifiers in the glass subsurface are preferentially replaced by protons, resulting in cation accumulation in the solution and formation of a leached layer enriched with Si on the solid. The behavior of Al was different. At 5 < pH < 9, only very small amounts of Al were found in the leachates, which can be explained by almost complete Al adsorption as stable surface complexes, i.e. >XOAl(OH)2 (where X = Si or Al and > represents the surface). At pH > 9, divalent cations adsorbed specifically, as >XOMe+ complexes (Me = Ca or Mg). This deeper understanding of the surface behavior of glasses and fibers is important for the design of composite materials, for applications in biology and medicine and in materials production in general, as well as for understanding natural processes, such as global uptake estimates of CO2 during rock weathering.
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Affiliation(s)
| | - C F Nielsen
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - L Z Lakshtanov
- Institute of Experimental Mineralogy RAS, 142432 Chernogolovka, Russia
| | - K N Dalby
- Haldor Topsoe A/S, Haldor Topsøes Alle 1, 2800 Kongens Lyngby, Denmark
| | - D B Johansson
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - M Solvang
- ROCKWOOL International A/S, 2640 Hedehusene, Denmark
| | - J Deubener
- Institute of Non-Metallic Materials, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany
| | - S L S Stipp
- Department of Physics, Danish Technical University, 2800 Kongens Lyngby, Denmark
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19
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Karakuzu-Ikizler B, Terzioğlu P, Basaran-Elalmis Y, Tekerek BS, Yücel S. Role of magnesium and aluminum substitution on the structural properties and bioactivity of bioglasses synthesized from biogenic silica. Bioact Mater 2020; 5:66-73. [PMID: 31989060 PMCID: PMC6965208 DOI: 10.1016/j.bioactmat.2019.12.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/20/2019] [Accepted: 12/24/2019] [Indexed: 12/29/2022] Open
Abstract
The objective of this study was to investigate the effect of magnesium (1 wt%) and aluminum (1 wt%) incorporation on the in vitro bioactivity and biodegradation behavior of 45S5 bioactive glasses synthesized from rice husk biogenic silica. The performance of biogenic silica-based samples was compared well with commercial silica-based counterparts. The in vitro biodegradation behavior of bioactive glasses was evaluated by the weight loss of samples and pH variation in the Tris buffer solution. Based on composition, bioglasses possessed different properties before and after simulated body fluid (SBF) immersion. The incorporation of magnesium (Mg) and aluminum (Al) enhanced the Vickers hardness of bioglasses. All the bioglasses showed the hydroxyapatite layer formation after SBF treatment as confirmed by the dissolution, FTIR, SEM and XRD analysis, however it was more prominent in the rice husk silica-based 45S5 bioglass. The biogenic silica seems to be a promising starting material for bioglass systems to be used in bone tissue engineering applications.
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Affiliation(s)
- Burcu Karakuzu-Ikizler
- Department of Bioengineering, Faculty of Chemistry and Metallurgy, Yildiz Technical University, Istanbul, Turkey
| | - Pınar Terzioğlu
- Department of Fiber and Polymer Engineering, Faculty of Engineering and Natural Sciences, Bursa Technical University, Bursa, Turkey
| | - Yeliz Basaran-Elalmis
- Department of Bioengineering, Faculty of Chemistry and Metallurgy, Yildiz Technical University, Istanbul, Turkey
| | - Bilge Sema Tekerek
- Department of Genetics and Bioengineering, Faculty of Engineering and Architecture, Nişantaşı University, Istanbul, Turkey
| | - Sevil Yücel
- Department of Bioengineering, Faculty of Chemistry and Metallurgy, Yildiz Technical University, Istanbul, Turkey
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20
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Marsh AC, Mellott NP, Pajares-Chamorro N, Crimp M, Wren A, Hammer ND, Chatzistavrou X. Fabrication and multiscale characterization of 3D silver containing bioactive glass-ceramic scaffolds. Bioact Mater 2019; 4:215-223. [PMID: 31236524 PMCID: PMC6580235 DOI: 10.1016/j.bioactmat.2019.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 01/02/2023] Open
Abstract
In this work, we fabricated and characterized bioactive 3D glass-ceramic scaffolds with inherent antibacterial properties. The sol-gel (solution-gelation) technique and the sacrificial template method were applied for the fabrication of 3D highly porous scaffolds in the 58.6SiO2 - 24.9CaO - 7.2P2O5 - 4.2Al2O3 - 1.5Na2O -1.5K2O - 2.1Ag2O system (Ag-BG). This system is known for its advanced bioactive and antibacterial properties. The fabrication of 3D scaffolds has potential applications that impact tissue engineering. The study of the developed scaffolds from macro-characteristics to nano-, revealed a strong correlation between the macroscale properties such as antibacterial action, bioactivity with the microstructural characteristics such as elemental analysis, crystallinity. Elemental homogeneity, morphological, and microstructural characteristics of the scaffolds were studied by scanning electron microscopy associated with energy dispersive spectroscopy (SEM-EDS), transmittance electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and UV-visible spectroscopy methods. The compressive strength of the 3D scaffolds was measured within the range of values for glass-ceramic scaffolds with similar compositions, porosity, and pore size. The capability of the scaffolds to form an apatite-like phase was tested by immersing the scaffolds in simulated body fluid (SBF) and the antibacterial response against methicillin-resistant Staphylococcus aureus (MRSA) was studied. The formation of an apatite phase was observed after two weeks of immersion in SBF and the anti-MRSA effect occurs after both direct and indirect exposure.
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Affiliation(s)
- Adam C. Marsh
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Nathan P. Mellott
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Natalia Pajares-Chamorro
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Martin Crimp
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
| | - Anthony Wren
- Alfred University, Kazuo Inamori School of Engineering, Alfred, NY, USA
| | - Neal D. Hammer
- Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, MI, USA
| | - Xanthippi Chatzistavrou
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, USA
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21
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Mokhtari S, Krull EA, Sanders LM, Coughlan A, Mellott NP, Gong Y, Borges R, Wren AW. Investigating the effect of germanium on the structure of SiO 2-ZnO-CaO-SrO-P 2O 5 glasses and the subsequent influence on glass polyalkenoate cement formation, solubility and bioactivity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109843. [PMID: 31349461 DOI: 10.1016/j.msec.2019.109843] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 02/12/2019] [Accepted: 05/30/2019] [Indexed: 11/19/2022]
Abstract
A series of germanium (Ge)-containing glasses were synthesized based on a starting glass composition of SiO2-ZnO-CaO-SrO-P2O5. Additions of GeO2 (6 and 12 mol%) were incorporated at the expense of SiO2, which retained the amorphous character, and each glass was processed to present similar particle size and surface area. Glass characterization using x-ray photoelectron spectroscopy (XPS) and magic angle spinning nuclear magnetic resonance (MAS-NMR) determined that the addition of GeO2 increased the fraction of lower Q-speciation and subsequently the concentration of non-bridging oxygens (NBO). Glass Polyalkenoate Cements (GPC) were formulated from each glass with 40, 50 and 60 wt% PAA, and presented time dependent solubility profiles (1, 10, 100, 1000 h) for the release of Si4+ (4-140 mg/l), Ca2+ (1-8 mg/l), Zn2+ (<6 mg/l), Sr2+ (2-37 mg/l), PO43- (2-43 mg/l) and Ge4+ (20-911 mg/l) and attained pH values close to 7.5 after 1000 h. Ge-GPCs containing 40 wt% polyacrylic acid (PAA) presented appropriate working time (Tw) and setting times (Ts), and the corresponding compressive strengths ranged from (14-30 MPa). The Ge-GPCs (40, 50 wt%) presented a linear increase (R2-0.99) with respect to time. Simulated Body Fluid (SBF) testing resulted in the Ge-GPCs encouraging the precipitation of crystalline hydroxyapatite on the GPC surface, more evidently after 100 and 1000 h incubation.
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Affiliation(s)
- S Mokhtari
- Kazuo Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - E A Krull
- Department of Bioengineering, University of Toledo, Toledo, OH, USA
| | - L M Sanders
- Department of Bioengineering, University of Toledo, Toledo, OH, USA
| | - A Coughlan
- Department of Bioengineering, University of Toledo, Toledo, OH, USA
| | - N P Mellott
- Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, USA
| | - Y Gong
- Kazuo Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - R Borges
- Department of Materials Science and Engineering, Universidad Federal do ABC, Sao Paulo, Brazil
| | - A W Wren
- Kazuo Inamori School of Engineering, Alfred University, Alfred, NY, USA.
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22
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Pérez R, Sanchez-Salcedo S, Lozano D, Heras C, Esbrit P, Vallet-Regí M, Salinas AJ. Osteogenic Effect of ZnO-Mesoporous Glasses Loaded with Osteostatin. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E592. [PMID: 30081542 PMCID: PMC6116259 DOI: 10.3390/nano8080592] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 07/25/2018] [Accepted: 08/01/2018] [Indexed: 11/16/2022]
Abstract
Mesoporous Bioactive Glasses (MBGs) are a family of bioceramics widely investigated for their putative clinical use as scaffolds for bone regeneration. Their outstanding textural properties allow for high bioactivity when compared with other bioactive materials. Moreover, their great pore volumes allow these glasses to be loaded with a wide range of biomolecules to stimulate new bone formation. In this study, an MBG with a composition, in mol%, of 80% SiO₂⁻15% CaO⁻5% P₂O₅ (Blank, BL) was compared with two analogous glasses containing 4% and 5% of ZnO (4ZN and 5ZN) before and after impregnation with osteostatin, a C-terminal peptide from a parathyroid hormone-related protein (PTHrP107-111). Zn2+ ions were included in the glass for their bone growth stimulator properties, whereas osteostatin was added for its osteogenic properties. Glasses were characterized, and their cytocompatibility investigated, in pre-osteoblastic MC3T3-E1 cell cultures. The simultaneous additions of osteostatin and Zn2+ ions provoked enhanced MC3T3-E1 cell viability and a higher differentiation capacity, compared with either raw BL or MBGs supplemented only with osteostatin or Zn2+. These in vitro results show that osteostatin enhances the osteogenic effect of Zn2+-enriched glasses, suggesting the potential of this combined approach in bone tissue engineering applications.
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Affiliation(s)
- Rebeca Pérez
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
| | - Sandra Sanchez-Salcedo
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28040 Madrid, Spain.
| | - Daniel Lozano
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28040 Madrid, Spain.
| | - Clara Heras
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
| | - Pedro Esbrit
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
- Instituto de Investigación Sanitaria (IIS)-Fundación Jiménez Díaz, 28040 Madrid, Spain.
| | - María Vallet-Regí
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28040 Madrid, Spain.
| | - Antonio J Salinas
- Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid, UCM, Instituto de Investigación Hospital 12 de Octubre, imas12, 28040 Madrid, Spain.
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28040 Madrid, Spain.
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23
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Ben-Nissan B, Choi AH, Macha I. Advances in Bioglass and Glass Ceramics for Biomedical Applications. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/978-3-662-53574-5_5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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24
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Al-Garawi ZS, Kostakis GE, Serpell LC. Chemically and thermally stable silica nanowires with a β-sheet peptide core for bionanotechnology. J Nanobiotechnology 2016; 14:79. [PMID: 27905946 PMCID: PMC5134108 DOI: 10.1186/s12951-016-0231-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 11/22/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A series of amyloidogenic peptides based on the sequence KFFEAAAKKFFE template the silica precursor, tetraethyl orthosilicate to form silica-nanowires containing a cross-β peptide core. RESULTS Investigation of the stability of these fibres reveals that the silica layers protect the silica-nanowires allowing them to maintain their shape and physical and chemical properties after incubation with organic solvents such as 2-propanol, ethanol, and acetonitrile, as well as in a strong acidic solution at pH 1.5. Furthermore, these nanowires were thermally stable in an aqueous solution when heated up to 70 °C, and upon autoclaving. They also preserved their conformation following incubation up to 4 weeks under these harsh conditions, and showed exceptionally high physical stability up to 1000 °C after ageing for 12 months. We show that they maintain their β-sheet peptide core even after harsh treatment by confirming the β-sheet content using Fourier transform infrared spectra. The silica nanowires show significantly higher chemical and thermal stability compared to the unsiliconised fibrils. CONCLUSIONS The notable chemical and thermal stability of these silica nanowires points to their potential for use in microelectromechanics processes or fabrication for nanotechnological devices.
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Affiliation(s)
- Zahraa S Al-Garawi
- School of Life Sciences, University of Sussex, East Sussex, Falmer, BN1 9QG, UK.,Chemistry Department, College of Sciences, Al-Mustansyria University, Baghdad, Iraq
| | - George E Kostakis
- School of Life Sciences, University of Sussex, East Sussex, Falmer, BN1 9QG, UK
| | - Louise C Serpell
- School of Life Sciences, University of Sussex, East Sussex, Falmer, BN1 9QG, UK.
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Saqaei M, Fathi M, Edris H, Mortazavi V, Hosseini N. Effects of adding forsterite bioceramic on in vitro activity and antibacterial properties of bioactive glass-forsterite nanocomposite powders. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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26
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Brauer DS, Brückner R, Tylkowski M, Hupa L. Sodium-free mixed alkali bioactive glasses. BIOMEDICAL GLASSES 2016. [DOI: 10.1515/bglass-2016-0012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractTwo sodium-free mixed alkali series of bioactive glasses based on compositions Bioglass 45S5 and ICIE1, containing lithium and/or potassium as alkali ions, were prepared by a melt-quench route. Thermal properties showed the well-known mixed alkali effect, with glass transition and crystallisation temperatures and the coefficient of thermal expansion going either through a minimum or a maximum for the mixed alkali composition, resulting in a wider processing window. Ion release, by contrast, was controlled by the modifier ionic radius, with ion release rates in dynamic and static dissolution studies increasing for potassium-substituted glasses compared to the composition containing lithium as the only alkali ion. This was caused by pronounced changes in oxygen packing density and molar volume of the glasses owing to the differences in ionic radii (76 pm for Li+ and 138 pm for K+). Partially substituting one alkali for another therefore helps to improve high temperature processing of bioactive glasses and can also be used to control or tailor ion release.
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Kilcup N, Gaynard S, Werner-Zwanziger U, Tonkopi E, Hayes J, Boyd D. Stimulation of apoptotic pathways in liver cancer cells: An alternative perspective on the biocompatibility and the utility of biomedical glasses. J Biomater Appl 2015; 30:1445-59. [DOI: 10.1177/0885328215621663] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A host of research opportunities with innumerable clinical applications are open to biomedical glasses if one considers their potential as therapeutic inorganic ion delivery systems. Generally, applications have been limited to repair and regeneration of hard tissues while compositions are largely constrained to the original bioactive glass developed in the 1960s. However, in oncology applications the therapeutic paradigm shifts from repair to targeted destruction. With this in mind, the composition–structure–property–function relationships of vanadium-containing zinc-silicate glasses (0.51SiO2–0.29Na2O–(0.20- X)ZnO– XV2O5, 0 ≤ X ≤ 0.09) were characterized in order to determine their potential as therapeutic inorganic ion delivery systems. Increased V2O5 mole fraction resulted in a linear decrease in density and glass transition temperature (Tg). 29Si MAS NMR peak maxima shifted upfield while 51V MAS NMR peak maxima were independent of V2O5 content and overlapped well with the spectra NaVO3. Increased V2O5 mole fraction caused ion release to increase. When human liver cancer cells, HepG2, were exposed to these ions they demonstrated a concentration-dependent cytotoxic response, mediated by apoptosis. This work demonstrates that the zinc-silicate system studied herein is capable of delivering therapeutic inorganic ions at concentrations that induce apoptotic cell death and provide a simple means to control therapeutic inorganic ion delivery.
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Affiliation(s)
- Nancy Kilcup
- School of Biomedical Engineering, Dalhousie University, Halifax, Canada
| | - Seán Gaynard
- Regenerative Medicine Institute, Bioscience Research Building, National University of Ireland Galway, Galway, Ireland
| | - Ulrike Werner-Zwanziger
- Department of Chemistry and Institute for Research in Materials, Dalhousie University, Halifax, Canada
| | - Elena Tonkopi
- Department of Diagnostic Imaging and Interventional Radiology, QEII Health Sciences Centre, Victoria General Hospital, Victoria Building, Halifax, Canada
- Department of Diagnostic Radiology, Dalhousie University, Halifax, Canada
| | - Jessica Hayes
- Regenerative Medicine Institute, Bioscience Research Building, National University of Ireland Galway, Galway, Ireland
| | - Daniel Boyd
- School of Biomedical Engineering, Dalhousie University, Halifax, Canada
- Department of Diagnostic Imaging and Interventional Radiology, QEII Health Sciences Centre, Victoria General Hospital, Victoria Building, Halifax, Canada
- Department of Applied Oral Sciences, Dentistry Building, Dalhousie University, Halifax, Canada
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Yatongchai C, Placek LM, Curran DJ, Towler MR, Wren AW. Investigating the addition of SiO2–CaO–ZnO–Na2O–TiO2 bioactive glass to hydroxyapatite: Characterization, mechanical properties and bioactivity. J Biomater Appl 2015; 30:495-511. [DOI: 10.1177/0885328215592866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Hydroxyapatite (Ca10(PO4)6(OH)2) is widely investigated as an implantable material for hard tissue restoration due to its osteoconductive properties. However, hydroxyapatite in bulk form is limited as its mechanical properties are insufficient for load-bearing orthopedic applications. Attempts have been made to improve the mechanical properties of hydroxyapatite, by incorporating ceramic fillers, but the resultant composite materials require high sintering temperatures to facilitate densification, leading to the decomposition of hydroxyapatite into tricalcium phosphate, tetra-calcium phosphate and CaO phases. One method of improving the properties of hydroxyapatite is to incorporate bioactive glass particles as a second phase. These typically have lower softening points which could possibly facilitate sintering at lower temperatures. In this work, a bioactive glass (SiO2–CaO–ZnO–Na2O–TiO2) is incorporated (10, 20 and 30 wt%) into hydroxyapatite as a reinforcing phase. X-ray diffraction confirmed that no additional phases (other than hydroxyapatite) were formed at a sintering temperature of 560 ℃ with up to 30 wt% glass addition. The addition of the glass phase increased the % crystallinity and the relative density of the composites. The biaxial flexural strength increased to 36 MPa with glass addition, and there was no significant change in hardness as a function of maturation. The pH of the incubation media increased to pH 10 or 11 through glass addition, and ion release profiles determined that Si, Na and P were released from the composites. Calcium phosphate precipitation was encouraged in simulated body fluid with the incorporation of the bioactive glass phase, and cell culture testing in MC-3T3 osteoblasts determined that the composite materials did not significantly reduce cell viability.
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Affiliation(s)
| | - Lana M Placek
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - Declan J Curran
- Faculty of Mechanical & Industrial Engineering, Ryerson University, Toronto, Ontario, Canada
| | - Mark R Towler
- Faculty of Mechanical & Industrial Engineering, Ryerson University, Toronto, Ontario, Canada
- Department of Biomedical Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Anthony W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
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Haas LM, Smith CM, Placek LM, Hall MM, Gong Y, Mellott NP, Wren AW. Investigating the effect of silver coating on the solubility, antibacterial properties, and cytocompatibility of glass microspheres. J Biomater Appl 2015; 30:450-62. [DOI: 10.1177/0885328215591902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Silver (Ag) coatings have been incorporated into many medical materials due to its ability to eradicate harmful microbes. In this study, glass microspheres (SiO2–Na2O–CaO–Al2O3) were synthesized and employed as substrates to investigate the effect Ag coating has on glass solubility and the subsequent biological effects. Initially, glasses were amorphous with a glass transition point (Tg) of 605℃ and microspheres were spherical with a mean particle diameter of 120 µm (±27). The Ag coating was determined to be crystalline in nature and its presence was confirmed using scanning electron microscopy and X-ray photoelectron spectroscopy. Ion release determined that Ag-coated ( Ag-S) microspheres increased the Na+ release rate but slightly reduced the Ca2+ and Si4+ release compared to an uncoated control ( UC-S). Additionally, the Ag-S reduced the pH to just above neutral (7.3–8.5) compared to the UC-S (7.7–9.1). Antibacterial testing determined significant reductions in planktonic Escherichia coli ( p = 0.000), Staphylococcus epidermidis ( p = 0.000) and Staphylococcus aureus ( p = 0.000) growth as a function of the presence of Ag and with respect to maturation (1, 7, and 30 days). Testing for toxicity levels using L929 Fibroblasts determined higher cell viability for the Ag-S at lower concentrations (5 µg/ml); in addition, no significant reduction in cell viability was observed with higher concentrations (15, 30 µg/ml).
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Affiliation(s)
- LM Haas
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - CM Smith
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - LM Placek
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - MM Hall
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - Y Gong
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - NP Mellott
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
| | - Anthony W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY, USA
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30
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Placek LM, Keenan TJ, Laffir F, Coughlan A, Wren AW. Characterization of Y2O3 and CeO2 doped SiO2-SrO-Na2O glasses. BIOMEDICAL GLASSES 2015. [DOI: 10.1515/bglass-2015-0016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe structural effects of yttrium (Y) and cerium (Ce) are investigated when substituted for sodium (Na) in a 0.52SiO2–0.24SrO–(0.24−x)Na2O–xMO (where x = 0.08; MO = Y2O3 and CeO2) glass series. Network connectivity (NC) was calculated assuming both Y and Ce can act as a network modifier (NC = 2.2) or as a network former (NC up to 2.9). Thermal analysis showed an increase in glass transition temperature (Tg) with increasing Y and Ce content, Y causing the greater increase from the control (Con) at 493∘C to 8 mol% Y (HY) at 660∘C. Vickers hardness (HV) was not significantly different between glasses. 29Si Magic Angle Spinning-Nuclear Magnetic Resonance (MAS-NMR) did not show peak shift with addition of Y, however Ce produced peak broadening and a negative shift in ppm. The addition of 4 mol% Ce in the YCe and LCe glasses shifted the peak from Con at −81.3 ppm to −82.8 ppm and −82.7 ppm respectively; while the HCe glass produced a much broader peak and a shift to −84.8 ppm. High resolution X-ray Photoelectron Spectroscopy for the O 1s spectral line showed the ratio of bridging (BO) to non-bridging oxygens (NBO), BO:NBO,was altered,where Con had a ratio of 0.7, HY decreased to 0.4 and HCe to 0.5.
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32
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Yu Q, Fu A, Li H, Liu H, Lv R, Liu J, Guo P, Zhao XS. Synthesis and characterization of magnetically separable Ag nanoparticles decorated mesoporous Fe3O4@carbon with antibacterial and catalytic properties. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.06.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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33
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Li Y, Coughlan A, Wren AW. Investigating the surface reactivity of SiO2-TiO2-CaO-Na2O/SrO bioceramics as a function of structure and incubation time in simulated body fluid. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1853-1864. [PMID: 24796627 DOI: 10.1007/s10856-014-5229-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/21/2014] [Indexed: 06/03/2023]
Abstract
This study focuses on evaluating the biocompatibility of a SiO2-TiO2-CaO-Na2O/SrO glass and glass-ceramic series. Glass and ceramic samples were synthesized and characterized using X-ray diffraction. Each material was subject to maturation in simulated body fluid over 1, 7 and 30 days to describe any changes in surface morphology. Calcium phosphate (CaP) deposition was observed predominantly on the Na(+) containing amorphous and crystalline materials, with plate-like morphology. The precipitated surface layer was also observed to crystallize with respect to maturation, which was most evident in the amorphous Na(+) containing glasses, Ly-N and Ly-C. The addition of Sr(2+) greatly reduced the solubility of all samples, with limited CaP precipitation on the amorphous samples and no deposition on the crystalline materials. The morphology of the samples was also different, presenting irregular plate-like structures (Ly-N), needle-like deposits (Ly-C) and globular-like structures (Ly-S). Cell culture analysis presented a significant increase in cell viability with the Na(+) materials, 134%, while the Sr(2+) containing glasses, 60-80% and ceramics, 60-85% presented a general reduction in cell viability, however these reductions were not significant.
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Affiliation(s)
- Y Li
- Inamori School of Engineering, Alfred University, Alfred, NY, 14802, USA
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34
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Kapoor S, Goel A, Tilocca A, Dhuna V, Bhatia G, Dhuna K, Ferreira JMF. Role of glass structure in defining the chemical dissolution behavior, bioactivity and antioxidant properties of zinc and strontium co-doped alkali-free phosphosilicate glasses. Acta Biomater 2014; 10:3264-78. [PMID: 24709542 DOI: 10.1016/j.actbio.2014.03.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 03/19/2014] [Accepted: 03/30/2014] [Indexed: 11/19/2022]
Abstract
We investigated the structure-property relationships in a series of alkali-free phosphosilicate glass compositions co-doped with Zn(2+) and Sr(2+). The emphasis was laid on understanding the structural role of Sr(2+) and Zn(2+) co-doping on the chemical dissolution behavior of glasses and its impact on their in vitro bioactivity. The structure of glasses was studied using molecular dynamics simulations in combination with solid state nuclear magnetic resonance spectroscopy. The relevant structural properties are then linked to the observed degradation behavior, in vitro bioactivity, osteoblast proliferation and oxidative stress levels. The apatite-forming ability of glasses has been investigated by X-ray diffraction, infrared spectroscopy and scanning electron microscopy-energy-dispersive spectroscopy after immersion of glass powders/bulk in simulated body fluid (SBF) for time durations varying between 1h and 14 days, while their chemical degradation has been studied in Tris-HCl in accordance with ISO 10993-14. All the glasses exhibit hydroxyapatite formation on their surface within 1-3h of their immersion in SBF. The cellular responses were observed in vitro on bulk glass samples using human osteosarcoma MG63 cell line. The dose-dependent cytoprotective effect of glasses with respect to the concentration of zinc and strontium released from the glasses is also discussed.
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Affiliation(s)
- Saurabh Kapoor
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal
| | - Ashutosh Goel
- Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8065, USA.
| | - Antonio Tilocca
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Vikram Dhuna
- Department of Biotechnology, DAV College, Amritsar 143-001, Punjab, India
| | - Gaurav Bhatia
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - Kshitija Dhuna
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143-005, Punjab, India
| | - José M F Ferreira
- Department of Materials and Ceramic Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal.
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35
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Wren AW, Coughlan A, Smith CM, Hudson SP, Laffir FR, Towler MR. Investigating the solubility and cytocompatibility of CaO-Na2O-SiO2/TiO2bioactive glasses. J Biomed Mater Res A 2014; 103:709-20. [DOI: 10.1002/jbm.a.35223] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 05/06/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Anthony W. Wren
- Inamori School of Engineering; Alfred University; Alfred New York
| | - Aisling Coughlan
- School of Materials Engineering; Purdue University; West Lafayette Indiana
| | | | - Sarah P. Hudson
- Materials and Surface Science Institute; University of Limerick; Limerick Ireland
| | - Fathima R. Laffir
- Materials and Surface Science Institute; University of Limerick; Limerick Ireland
| | - Mark R. Towler
- Department of Mechanical and Industrial Engineering; Ryerson University; Toronto Canada
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36
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Li HC, Wang DG, Hu JH, Chen CZ. Influence of fluoride additions on biological and mechanical properties of Na2O-CaO-SiO2-P2O5 glass-ceramics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 35:171-8. [PMID: 24411365 DOI: 10.1016/j.msec.2013.10.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/29/2013] [Accepted: 10/19/2013] [Indexed: 10/26/2022]
Abstract
Two series of Na2O-CaO-SiO2-P2O5 glass-ceramics doped with NH4HF2 (G-NH4HF2) or CaF2 (G-CaF2) have been prepared by sol-gel method. The glass-ceramic phase composition and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The mechanical properties and thermal expansion coefficient were measured by a microhardness tester, an electronic tensile machine and a thermal expansion coefficient tester. The structure difference between these two glass-ceramics was investigated by Fourier transform infrared spectroscopy (FTIR), and the in vitro bioactivity of the glass-ceramics was determined by in vitro simulated body fluid (SBF) immersion test. The hemolysis test, in vitro cytotoxicity test, systemic toxicity test and the implanted experiment in animals were used to evaluate the biocompatibility of the glass-ceramics. The mechanical properties of sample G-NH4HF2 are lower than that of sample G-CaF2, and the bioactivity of sample G-NH4HF2 is better than that of sample G-CaF2. The thermal expansion coefficients of these two glass-ceramics are all closer to that of Ti6Al4V. After 7 days of SBF immersion, apatites were induced on glass-ceramic surface, indicating that the glass-ceramics have bioactivity. The hemolysis test, in vitro cytotoxicity test and systemic toxicity test demonstrate that the glass-ceramics do not cause hemolysis reaction, and have no toxicity to cell and living animal. The implanted experiment in animals shows that bone tissue can form a good osseointegration with the implant after implantation for two months, indicating that the glass-ceramics are safe to serve as implants.
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Affiliation(s)
- H C Li
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, Shandong, People's Republic of China; School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, People's Republic of China
| | - D G Wang
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, Shandong, People's Republic of China; School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, People's Republic of China.
| | - J H Hu
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, Shandong, People's Republic of China; School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, People's Republic of China
| | - C Z Chen
- Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, Shandong, People's Republic of China; School of Materials Science and Engineering, Shandong University, Jinan 250061, Shandong, People's Republic of China.
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37
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Li H, Wang D, Hu J, Chen C. Effect of various additives on microstructure, mechanical properties, and in vitro bioactivity of sodium oxide-calcium oxide-silica-phosphorus pentoxide glass–ceramics. J Colloid Interface Sci 2013; 405:296-304. [DOI: 10.1016/j.jcis.2013.04.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Revised: 04/15/2013] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
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Wren AW, Hansen JP, Hayakawa S, Towler MR. Aluminium-free glass polyalkenoate cements: ion release and in vitro antibacterial efficacy. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:1167-1178. [PMID: 23386211 DOI: 10.1007/s10856-013-4880-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 01/25/2013] [Indexed: 06/01/2023]
Abstract
Glass polyalkenoate cements (GPCs) have exhibited potential as bone cements. This study investigates the effect of substituting TiO₂ for SiO₂ in the glass phase and the subsequent effect on cement rheology, mechanical properties, ion release and antibacterial properties. Glass characterization revealed a reduction in glass transition temperature (T(g)) from 685 to 669 °C with the addition of 6 mol % TiO₂ (AT-2). Magic angle spinning nuclear magnetic resonance (MAS-NMR) revealed a shift from -81 ppm to -76 pmm when comparing a Control glass to AT-2, indicating de-polymerization of the Si network. The incorporation of TiO₂ also increased the working time (T(w)) from 19 to 61 s and setting time (T(s)) from 70 to 427 s. The maximum compressive strength (σ(c)) increased from 64 to 85 MPa. Ion release studies determined that the addition of Ti to the glass reduced the release of zinc, calcium and strontium ions, with low concentrations of titanium being released. Antibacterial testing in E. coli resulted in greater bactericidal effects when tested in aqueous broth for both titanium containing cements.
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Affiliation(s)
- A W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY 14802, USA.
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39
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Tan C, Sun Z, Hong Y, Li Y, Chen X, Zhang X. Reverse-biomineralization assembly of acid-sensitive biomimetic fibers for hard tissue engineering and drug delivery. J Mater Chem B 2013; 1:3694-3704. [DOI: 10.1039/c3tb20274g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wren AW, Coughlan A, Hassanzadeh P, Towler MR. Silver coated bioactive glass particles for wound healing applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1331-1341. [PMID: 22426653 DOI: 10.1007/s10856-012-4604-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 02/27/2012] [Indexed: 05/31/2023]
Abstract
Bioactive glass particles (0.42SiO(2)-0.15CaO-0.23Na(2)O-0.20ZnO) of varying size (<90 μm and 425-850 μm) were synthesized and coated with silver (Ag) to produce Ag coated particles (PAg). These were compared against the uncoated analogous particles (Pcon.). Surface area analysis determined that Ag coating of the glass particles resulted in increased the surface area from 2.90 to 9.12 m(2)/g (90 μm) and 1.09-7.71 m(2)/g (425-850 μm). Scanning electron microscopy determined that the Ag coating remained at the surface and there was little diffusion through the bulk. Antibacterial (Escherichia coli--13 mm and Staphylococcus epidermidis--12 mm) and antifungal testing (Candida albicans--7.7 mm) determined that small Ag-coated glass particles exhibited the largest inhibition zones compared to uncoated particles. pH analysis determined an overall higher pH consider in the smaller particles, where after 24 h the large uncoated and Ag coated particles were 8.27 and 8.74 respectively, while the smaller uncoated and Ag coated particles attained pH values of 9.63 and 9.35 respectively.
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Affiliation(s)
- A W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY 14802, USA.
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42
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Lin CC, Chen SF, Leung KS, Shen P. Effects of CaO/P2O5 ratio on the structure and elastic properties of SiO2-CaO-Na2O-P2O5 bioglasses. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:245-258. [PMID: 22109904 DOI: 10.1007/s10856-011-4504-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 11/11/2011] [Indexed: 05/31/2023]
Abstract
The evolution of elastic properties and structure upon the change of CaO/P(2)O(5) ratio in SiO(2)-CaO-Na(2)O-P(2)O(5) glasses (45S5-derived and 55S4-derived) at ambient conditions has been studied by using both Brillouin and Raman spectroscopy coupled with X-ray diffraction. Under the same SiO(2)/Na(2)O ratio, it is found that a decrease in CaO/P(2)O(5) molar ratio has caused a more-polymerized silicate network via a net consumption of Q(0), Q(1), and Q(2) species yet enriching in Q(3) and Q(4) species. Brillouin experiments revealed that all the bulk, shear and Young's moduli of the glasses studied increases with the increase of CaO/P(2)O(5) molar ratio. The unexpected variation trend in shear modulus can be correlated to the contribution from cohesion, the less-polymerized phosphate Q species, and density. Compared to the 45S5-derived, the more-polymerized 55S4-deived glass has a lower bulk but slightly higher shear modulus at the given CaO/P(2)O(5) ratio.
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Affiliation(s)
- Chung-Cherng Lin
- Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, ROC.
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43
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Stan GE, Pasuk I, Husanu MA, Enculescu I, Pina S, Lemos AF, Tulyaganov DU, El Mabrouk K, Ferreira JMF. Highly adherent bioactive glass thin films synthetized by magnetron sputtering at low temperature. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:2693-2710. [PMID: 21915698 DOI: 10.1007/s10856-011-4441-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 08/29/2011] [Indexed: 05/31/2023]
Abstract
Thin (380-510 nm) films of a low silica content bioglass with MgO, B(2)O(3), and CaF(2) as additives were deposited at low-temperature (150°C) by radio-frequency magnetron sputtering onto titanium substrates. The influence of sputtering conditions on morphology, structure, composition, bonding strength and in vitro bioactivity of sputtered bioglass films was investigated. Excellent pull-out adherence (~73 MPa) was obtained when using a 0.3 Pa argon sputtering pressure (BG-a). The adherence declined (~46 MPa) upon increasing the working pressure to 0.4 Pa (BG-b) or when using a reactive gas mixture (~50 MPa). The SBF tests clearly demonstrated strong biomineralization features for all bioglass sputtered films. The biomineralization rate increased from BG-a to BG-b, and yet more for BG-c. A well-crystallized calcium hydrogen phosphate-like phase was observed after 3 and 15 days of immersion in SBF in all bioglass layers, which transformed monotonously into hydroxyapatite under prolonged SBF immersion. Alkali and alkali-earth salts (NaCl, KCl and CaCO(3)) were also found at the surface of samples soaked in SBF for 30 days. The study indicated that features such as composition, structure, adherence and bioactivity of bioglass films can be tailored simply by altering the magnetron sputtering working conditions, proving that this less explored technique is a promising alternative for preparing implant-type coatings.
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Affiliation(s)
- G E Stan
- National Institute of Materials Physics, Bucharest-Magurele, Romania.
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Nazari A, Riahi S. RETRACTED ARTICLE: Artificial neural networks to prediction total specific pore volume of geopolymers produced from waste ashes. Neural Comput Appl 2011. [DOI: 10.1007/s00521-011-0760-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Wren A, Akgun B, Adams B, Coughlan A, Mellott N, Towler M. Characterization and antibacterial efficacy of silver-coated Ca–Na–Zn–Si/Ti glasses. J Biomater Appl 2011; 27:433-43. [DOI: 10.1177/0885328211411000] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A glass series [ xSiO2[ −y]·0.36ZnO·0.17Na2O·0.05CaO (starting at x = 0.50, y = 0.08 TiO2)] was formulated with TiO2 substituting SiO2. Each glass/silver-coated glass was characterized using X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy. Surface area analysis revealed significant changes after silver coating, 0.43–0.95 m2/g (control), to 0.53–1.85 m2/g (AU-1), and 0.20–1.11 m2/g (AU-2). Ion release from uncoated glasses included sodium (0.08 mg/L), calcium (0.07 mg/L), and zinc (0.008 mg/L), where silver-coated glasses presented 0.42 mg/L (silver), 0.33 mg/L (sodium), 0.02 mg/L (calcium), and 0.01 mg/L (zinc). Ag-coated glasses presented inhibition zones of 7.75 mm (control) compared to 1.04 mm (AU-2).
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Affiliation(s)
- Anthony Wren
- Inamori School of Engineering, Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
| | - Betul Akgun
- Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey
| | - Brian Adams
- Inamori School of Engineering, Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
| | - Aisling Coughlan
- Inamori School of Engineering, Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
| | - Nathan Mellott
- Inamori School of Engineering, Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
| | - Mark Towler
- Inamori School of Engineering, Alfred University, 1 Saxon Drive, Alfred, NY 14802, USA
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Wren AW, Cummins NM, Laffir FR, Hudson SP, Towler MR. The bioactivity and ion release of titanium-containing glass polyalkenoate cements for medical applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:19-28. [PMID: 21076857 DOI: 10.1007/s10856-010-4184-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Accepted: 10/30/2010] [Indexed: 05/30/2023]
Abstract
The ion release profiles and bioactivity of a series of Ti containing glass polyalkenoate cements. Characterization revealed each material to be amorphous with a T(g) in the region of 650-660°C. The network connectivity decreased (1.83-1.35) with the addition of TiO(2) which was also evident with analysis by X-ray photoelectron spectroscopy. Ion release from cements were determined using atomic absorption spectroscopy for zinc (Zn(2+)), calcium (Ca(2+)), strontium (Sr(2+)), Silica (Si(4+)) and titanium (Ti(4+)). Ions such as Zn(2+) (0.1-2.0 mg/l), Ca(2+) (2.0-8.3 mg/l,) Sr(2+) (0.1-3.9 mg/l), and Si(4+) (14-90 mg/l) were tested over 1-30 days. No Ti(4+) release was detected. Simulated body fluid revealed a CaP surface layer on each cement while cell culture testing of cement liquid extracts with TW-Z (5 mol% TiO(2)) produced the highest cell viability (161%) after 30 days. Direct contact testing of discs resulted in a decrease in cell viability of the each cement tested.
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Affiliation(s)
- A W Wren
- Inamori School of Engineering, Alfred University, Alfred, NY 14802, USA.
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Ma J, Chen C, Wang D, Shi J. Textural and structural studies of sol–gel derived SiO2–CaO–P2O5–MgO glasses by substitution of MgO for CaO. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wren A, Clarkin OM, Laffir FR, Ohtsuki C, Kim IY, Towler MR. The effect of glass synthesis route on mechanical and physical properties of resultant glass ionomer cements. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:1991-1999. [PMID: 19459033 DOI: 10.1007/s10856-009-3781-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2009] [Accepted: 05/08/2009] [Indexed: 05/27/2023]
Abstract
Glass ionomer cements (GICs) have potential orthopaedic applications. Solgel processing is reported as having advantages over the traditional melt-quench route for synthesizing the glass phase of GICs, including far lower processing temperatures and higher levels of glass purity and homogeneity. This work investigates a novel glass formulation, BT 101 (0.48 SiO(2)-0.36 ZnO-0.12 CaO-0.04 SrO) produced by both the melt-quench and the solgel route. The glass phase was characterised by X-ray diffraction (XRD) to determine whether the material was amorphous and differential thermal analysis (DTA) to measure the glass transition temperature (T (g)). Particle size analysis (PSA) was used to determine the mean particle size and X-ray photoelectron spectroscopy (XPS) was used to investigate the structure and composition of the glass. Both glasses, the melt-quench BT 101 and the solgel BT 101, were mixed with 50 wt% polyacrylic acid (M (w), 80,800) and water to form a GIC and the working time (T (w)) and the setting time (T (s)) of the resultant cements were then determined. The cement based on the solgel glass had a longer T (w) (78 s) as compared to the cement based on the melt derived glass (19 s). T (s) was also much longer for the cement based on the solgel (1,644 s) glass than for the cement based on the melt-derived glass (25 s). The cements based on the melt derived glass produced higher strengths in both compression (sigma(c)) and biaxial flexure (sigma(f)), where the highest strength was found to be 63 MPa in compression, at both 1 and 7 days. The differences in setting and mechanical properties can be associated to structural differences within the glass as determined by XPS which revealed the absence of Ca in the solgel system and a much greater concentration of bridging oxygens (BO) as compared to the melt-derived system.
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Affiliation(s)
- A Wren
- Clinical Materials Unit, Materials and Surface Science Institute, University of Limerick, National Technological Park, Limerick, Ireland.
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Zhao Y, Song M, Liu J. Characteristics of bioactive glass coatings obtained by pulsed laser deposition. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2925] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cacaina D, Ylänen H, Simon S, Hupa M. The behaviour of selected yttrium containing bioactive glass microspheres in simulated body environments. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:1225-33. [PMID: 17701304 DOI: 10.1007/s10856-007-3163-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Accepted: 08/28/2006] [Indexed: 05/16/2023]
Abstract
The study aims at the manufacture and investigation of biodegradable glass microspheres incorporated with yttrium potentially useful for radionuclide therapy of cancer. The glass microspheres in the SiO2-Na2O-P2O5-CaO-K2O-MgO system containing yttrium were prepared by conventional melting and flame spheroidization. The behaviour of the yttrium silicate glass microspheres was investigated under in vitro conditions using simulated body fluid (SBF) and Tris buffer solution (TBS), for different periods of time, according to half-life time of the Y-90. The local structure of the glasses and the effect of yttrium on the biodegradability process were evaluated by Fourier Transform Infrared (FT-IR) spectroscopy and Back Scattered Electron Imaging of Scanning Electron Microscopy (BEI-SEM) equipped with Energy Dispersive X-ray (EDX) analysis. UV-VIS spectrometry and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used for analyzing the release behaviour of silica and yttrium in the two used solutions. The results indicate that the addition of yttrium to a bioactive glass increases its structural stability which therefore, induced a different behaviour of the glasses in simulated body environments.
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Affiliation(s)
- D Cacaina
- Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, Cluj-Napoca 400084, Romania.
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