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Sotniczuk A, Kalita D, Chromiński W, Matczuk M, Pisarek M, Garbacz H. Albumin suppresses oxidation of TiNb alloy in the simulated inflammatory environment. J Biomed Mater Res B Appl Biomater 2024; 112:e35404. [PMID: 38533765 DOI: 10.1002/jbm.b.35404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 02/12/2024] [Accepted: 03/13/2024] [Indexed: 03/28/2024]
Abstract
Literature data has shown that reactive oxygen species (ROS), generated by immune cells during post-operative inflammation, could induce corrosion of standard Ti-based biomaterials. For Ti6Al4V alloy, this process can be further accelerated by the presence of albumin. However, this phenomenon remains unexplored for Ti β-phase materials, such as TiNb alloys. These alloys are attractive due to their relatively low elastic modulus value. This study aims to address the question of how albumin influences the corrosion resistance of TiNb alloy under simulated inflammation. Electrochemical and ion release tests have revealed that albumin significantly enhances corrosion resistance over both short (2 and 24 h) and long (2 weeks) exposure periods. Furthermore, post-immersion XPS and cross-section TEM analysis have demonstrated that prolonged exposure to an albumin-rich inflammatory solution results in the complete coverage of the TiNb surface by a protein layer. Moreover, TEM studies revealed that H2O2-induced oxidation and further formation of a defective oxide film were suppressed in the solution enriched with albumin. Overall results indicate that contrary to Ti6Al4V, the addition of albumin to the PBS + H2O2 solution is not necessary to simulate the harsh inflammatory conditions as could possibly be found in the vicinity of a TiNb implant.
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Affiliation(s)
- Agata Sotniczuk
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, Otwock, Poland
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Damian Kalita
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, Otwock, Poland
| | - Witold Chromiński
- NOMATEN Centre of Excellence, National Centre for Nuclear Research, Otwock, Poland
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Magdalena Matczuk
- Chair of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Warsaw, Poland
| | - Marcin Pisarek
- Laboratory of Surface Analysis, Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | - Halina Garbacz
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Warsaw, Poland
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Alberta LA, Fortouna Y, Vishnu J, Pilz S, Gebert A, Lekka C, Nielsch K, Calin M. Effects of Ga on the structural, mechanical and electronic properties of β-Ti-45Nb alloy by experiments and ab initio calculations. J Mech Behav Biomed Mater 2023; 140:105728. [PMID: 36827933 DOI: 10.1016/j.jmbbm.2023.105728] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/11/2023] [Accepted: 02/11/2023] [Indexed: 02/16/2023]
Abstract
This work aims to investigate the structural, mechanical and electronic properties of four novel β-type (100-x)(Ti-45Nb)-xGa alloys (x = 2, 4, 6, 8 wt%) for implant applications by means of experimental and theoretical (ab initio) methods. All alloys retain the bcc β phase in the solution-treated and quenched state while the lattice parameter decreases with increase in Ga content. This is due to its smaller atomic radius compared to Ti and Nb, in line with the present density functional theory (DFT) calculations. Tensile and microhardness tests indicate a clear strengthening effect with increasing Ga content, with yield strengths in the range 551 ÷ 681 MPa and microhardness in the range 174 ÷ 232 HV0.1, mainly attributed to grain refinement and solid solution strengthening. Ga also positively affects ductility, with a maximum value of tensile strain at fracture of 32%. Non-destructive ultrasonic measurements and DFT calculations reveal that the bulk modulus is unaffected by the Ga presence. This phenomenon might be due to the fact that Ga introduced bonding and anti-bonding electron low energy states which balance the average bond strength among the atoms in the metallic matrix. Nevertheless, the introduction of new Ga-Ti super sp-like bonding orbitals along the [110] and [-110] directions in the Ga neighborhood could explain the increase of the Young's modulus upon Ga addition (73 ÷ 82.5 GPa) that was found experimentally in the present work. Hence, Ga addition to Ti-45Nb leads to a suitable balance between increased strength and low Young's modulus.
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Affiliation(s)
- Ludovico Andrea Alberta
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany.
| | - Yannick Fortouna
- University of Ioannina, Department of Materials Science & Engineering, Ioannina, 45110, Greece
| | - Jithin Vishnu
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany
| | - Stefan Pilz
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany
| | - Annett Gebert
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany
| | - Christina Lekka
- University of Ioannina, Department of Materials Science & Engineering, Ioannina, 45110, Greece; University Research Center of Ioannina (URCI), Institute of Materials Science and Computing, Ioannina, 45110, Greece
| | - Kornelius Nielsch
- Institute for Metallic Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany; Institute of Materials Science, Technische Universität Dresden, Helmholtzstraße 7, Dresden, 01062, Germany; Institute of Applied Physics, Technische Universität Dresden, Nöthnitzer Straße 61, Dresden, 01062, Germany
| | - Mariana Calin
- Institute for Complex Materials, Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., Helmholtzstraße 20, Dresden, 01069, Germany
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Arias-González F, Rodríguez-Contreras A, Punset M, Manero JM, Barro Ó, Fernández-Arias M, Lusquiños F, Gil J, Pou J. Laser-Deposited Beta Type Ti-42Nb Alloy with Anisotropic Mechanical Properties for Pioneering Biomedical Implants with a Very Low Elastic Modulus. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7172. [PMID: 36295241 PMCID: PMC9607472 DOI: 10.3390/ma15207172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Present commercial titanium alloy implants have an elastic modulus higher than 100 GPa, whereas that of the cortical bone is much smaller (17−28 GPa). This elastic modulus mismatch produces a stress shielding effect and the resorption of the bone surrounding the implant. In the present work, a <100> fiber texture is developed in β type Ti-42Nb (wt%) alloy ingots generated by laser-directed energy deposition (LDED) in order to achieve anisotropic mechanical properties. In addition, we demonstrate that laser-deposited β type Ti-42Nb alloy ingots with an intense <100> fiber texture exhibit a very low elastic modulus in the building direction (Ez < 50 GPa) and high yield (σ0.2z > 700 MPa) and tensile (UTSz > 700 MPa) strengths. Laser-deposited Ti-42Nb alloy enhances the osteoinductive effect, promoting the adhesion, proliferation, and spreading of human osteoblast-like cells. Hence, we propose that laser-deposited β type Ti-42Nb alloy is a potentially promising candidate for the manufacturing of pioneering biomedical implants with a very low elastic modulus that can suppress stress shielding.
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Affiliation(s)
- Felipe Arias-González
- LaserOn Research Group, CINTECX, School of Engineering, Universidade de Vigo (UVIGO), Lagoas Marcosende, 36310 Vigo, Spain
| | - Alejandra Rodríguez-Contreras
- Biomaterials, Biomechanics and Tissue Engineering Group, Materials Science and Engineering Department, and Research Center for Biomedical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), 08034 Barcelona, Spain
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
| | - Miquel Punset
- Biomaterials, Biomechanics and Tissue Engineering Group, Materials Science and Engineering Department, and Research Center for Biomedical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), 08034 Barcelona, Spain
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
- UPC Innovation and Technology Center (CIT-UPC), Universitat Politècnica de Catalunya (UPC), 08034 Barcelona, Spain
| | - José María Manero
- Biomaterials, Biomechanics and Tissue Engineering Group, Materials Science and Engineering Department, and Research Center for Biomedical Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), 08034 Barcelona, Spain
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya (UPC), 08019 Barcelona, Spain
| | - Óscar Barro
- LaserOn Research Group, CINTECX, School of Engineering, Universidade de Vigo (UVIGO), Lagoas Marcosende, 36310 Vigo, Spain
| | - Mónica Fernández-Arias
- LaserOn Research Group, CINTECX, School of Engineering, Universidade de Vigo (UVIGO), Lagoas Marcosende, 36310 Vigo, Spain
| | - Fernando Lusquiños
- LaserOn Research Group, CINTECX, School of Engineering, Universidade de Vigo (UVIGO), Lagoas Marcosende, 36310 Vigo, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, 36312 Vigo, Spain
| | - Javier Gil
- School of Dentistry, Universitat Internacional de Catalunya (UIC), 08195 Sant Cugat del Vallès, Spain
| | - Juan Pou
- LaserOn Research Group, CINTECX, School of Engineering, Universidade de Vigo (UVIGO), Lagoas Marcosende, 36310 Vigo, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, 36312 Vigo, Spain
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Hang R, Zhao Y, Zhang Y, Yao R, Yao X, Sun Y, Huang D, Hang R. The role of nanopores constructed on micropitted titanium surface on immune responses of macrophages and the potential mechanisms. J Mater Chem B 2022; 10:7732-7743. [DOI: 10.1039/d2tb01263d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Delayed transition of pro-inflammatory M1 to pro-healing M2 of macrophages (MΦs) on implant surface is one of the most important reasons accounting for poor osseointegration. The present work proposes to...
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Bresciani G, Gemmiti M, Ciancaleoni G, Pampaloni G, Marchetti F, Crucianelli M. Niobium(V) oxido tris-carbamate as easily available and robust catalytic precursor for the selective sulfide to sulfone oxidation. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Improvisation and Evaluation of Laterosporulin Coated Titanium Surfaces for dental Applications: An In Vitro Investigation. Indian J Microbiol 2021; 61:203-211. [PMID: 33927461 DOI: 10.1007/s12088-021-00933-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/22/2021] [Indexed: 10/21/2022] Open
Abstract
Despite recent improvement in implant survival rates, there remains a significant demand for enhancing the long-term clinical efficacy of titanium (Ti) implants, particularly for the prevention of peri-implantitis. Bioactive substances such as antimicrobial peptides are emerging as effective alternatives for contemporary antimicrobial agents used in dental health care. Current research work was focused to use laterosporulins that are non-haemolytic cationic antimicrobial peptides from Brevibacillus spp. for coating commercially available Ti discs. The coated Ti surfaces were evaluated in vitro for biofilm formation by two dental plaque isolates Streptococcus gordonii strain DIGK25 and S. mutans strain DIGK119 as representatives of commensal and pathogenic streptococci respectively. The biofilm inhibition was ascertained with replicated experiments on hydroxyapatite discs and confirmed by florescence microscopy. The laterosporulin coated Ti discs showed significantly reduced biofilm formation by oral streptococci and displayed promising potential to enhance the antibacterial surface properties. Such improvised Ti surfaces may curb the menace of oral streptococcal biofilm formation on dental implants and the associated implant failures.
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Chernozem RV, Surmeneva MA, Ignatov VP, Peltek OO, Goncharenko AA, Muslimov AR, Timin AS, Tyurin AI, Ivanov YF, Grandini CR, Surmenev RA. Comprehensive Characterization of Titania Nanotubes Fabricated on Ti–Nb Alloys: Surface Topography, Structure, Physicomechanical Behavior, and a Cell Culture Assay. ACS Biomater Sci Eng 2020; 6:1487-1499. [DOI: 10.1021/acsbiomaterials.9b01857] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roman V. Chernozem
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Maria A. Surmeneva
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Viktor P. Ignatov
- The Kizhner Research Center, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
| | - Oleksii O. Peltek
- RASA Center, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 St. Petersburg, Russian Federation
| | - Alexander A. Goncharenko
- RASA Center, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 St. Petersburg, Russian Federation
| | - Albert R. Muslimov
- RASA Center, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya, 29, 195251 St. Petersburg, Russian Federation
- First I. P. Pavlov State Medical University of St. Petersburg, Lev Tolstoy str., 6/8, 197022 St. Petersburg, Russian Federation
| | - Alexander S. Timin
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
- First I. P. Pavlov State Medical University of St. Petersburg, Lev Tolstoy str., 6/8, 197022 St. Petersburg, Russian Federation
| | - Alexander I. Tyurin
- Research Institute for Nanotechnologies and Nanomaterials, G.R. Derzhavin Tambov State University, 392000 Tambov, Russia
| | - Yurii F. Ivanov
- Institute of High Current Electronics (IHCE), 2/3 Akademichesky Avenue, Tomsk 634055, Russia
| | - Carlos R. Grandini
- Departamento de Fesica, Universidade Estadual Paulista, campus de Bauru, 17033-360 Bauru, São Paulo, Brazil
| | - Roman A. Surmenev
- Physical Materials Science and Composite Materials Centre, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
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Formation and in vitro mineralization of electrochemically deposited coatings prepared on micro-arc oxidized titanium alloy. J APPL ELECTROCHEM 2019. [DOI: 10.1007/s10800-019-01293-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Cell response to plasma electrolytic oxidation surface-modified low-modulus β-type titanium alloys. Colloids Surf B Biointerfaces 2019; 176:176-184. [DOI: 10.1016/j.colsurfb.2018.12.064] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 12/18/2018] [Accepted: 12/22/2018] [Indexed: 12/24/2022]
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Lauria I, Kutz TN, Böke F, Rütten S, Zander D, Fischer H. Influence of nanoporous titanium niobium alloy surfaces produced via hydrogen peroxide oxidative etching on the osteogenic differentiation of human mesenchymal stromal cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 98:635-648. [PMID: 30813067 DOI: 10.1016/j.msec.2019.01.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 12/20/2018] [Accepted: 01/07/2019] [Indexed: 12/21/2022]
Abstract
Titanium niobium alloys exhibit a lower stiffness compared to Ti6Al4V, the 'gold standard' for load-bearing bone implants. Thus, the critical mismatch in stiffness between the implant and adjacent bone tissue could be addressed with TiNb alloys and thereby reduce stress shielding, which can result in bone resorption and subsequent implant loosening; however, the cellular response on the specific material is crucial for sufficient osseointegration. We therefore hypothesize that the response of human mesenchymal stromal cells (hMSC) and osteoblast-like cells on Ti45Nb surfaces can be improved by a novel nanoporous surface structure. For this purpose, an etching technique using hydrogen peroxide electrolyte solution was applied to Ti45Nb. The treated surfaces were characterized using SEM, LSM, AFM, nanoindentation, and contact angle measurements. Cell culture experiments using hMCS and MG-63 were conducted. The H2O2 treatment resulted in surface nanopores, an increase in surface wettability and a reduction in surface hardness. The proliferation of MG-63 was enhanced on TiNb45 compared to Ti6Al4V. MG-63 focal adhesion complexes were detected on all Ti45Nb surfaces, whereas the nanostructures notably increased the cell area and decreased cell solidity, indicating stimulated cell spreading and pseudopodia formation. Alizarin red stainings indicated that the nanoporous surfaces stimulated the osteogenic differentiation of hMSC. It can be concluded that the proposed surface treatment could potentially help to stimulate the osseointegration behaviour of the advantageous low stiff Ti45Nb alloy.
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Affiliation(s)
- Ines Lauria
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
| | - Tatiana Nicole Kutz
- Chair of Corrosion and Corrosion Protection, Foundry Institute, RWTH Aachen University, Intzestrasse 5, 52072 Aachen, Germany.
| | - Frederik Böke
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
| | - Stephan Rütten
- Electron Microscopy Facility, Institute of Pathology, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
| | - Daniela Zander
- Chair of Corrosion and Corrosion Protection, Foundry Institute, RWTH Aachen University, Intzestrasse 5, 52072 Aachen, Germany.
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
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Assembled gold nanorods for the photothermal killing of bacteria. Colloids Surf B Biointerfaces 2018; 173:833-841. [PMID: 30551299 DOI: 10.1016/j.colsurfb.2018.10.060] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/18/2018] [Accepted: 10/23/2018] [Indexed: 12/26/2022]
Abstract
Titanium and its alloys are widely used in many clinical applications, but implant-associated infection may lead to implant failure. Because of the increasing concern about antibiotic resistant pathogen, photothermal therapy (PTT) as a new treatment strategy has received considerable attention. In this work, gold nanorods (GNRs) photoexcited by the near-infrared (NIR) light were immobilized on Ti surface by electrostatic surface self-assembly technique. Field emission scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used to explore the morphology and composition of the GNRs-modified surface. The photothermal temperature of the immobilized GNRs was measured by an infrared thermal imaging system in real time. In vitro study reveal that the prepared GNRs-modified surface exhibits antibacterial activity against four kinds of bacterial strains including both Gram-negative bacilli (Escherichia coli and Pseudomonas aeruginosa) and Gram-positive cocci (Staphylococcus aureus and Staphylococcus epidermidis) under the irradiation of 808 nm laser. Besides, the antibacterial efficiency of the GNRs-modified surface could keep stable after multiple laser exposure. It should be noted that the GNRs-modified surface shows better antibacterial effect against Gram-negative bacilli compared to Gram-positive cocci. Moreover, the GNRs-modified surface has no obvious adverse effect to the osteoblast precursor cells under NIR irradiation. These data demonstrate that the GNRs-modified surface with negligible cytotoxicity and recyclable antibacterial effect provides a favorable model for the translation of photothermal therapy to the clinical application.
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Structure and bonding in NbX5 X = (F, Cl, Br and I) complexes: a molecular orbital perspective in the C–H bond activation. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2348-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Synthesis of new coordination complexes of MF5 (M = Nb, Ta), and insights into the Ta(V) reduction. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Synthesis and spectroscopic/DFT structural characterization of coordination compounds of Nb(V) and Ti(IV) with bioactive carboxylic acids. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Schmidt R, Pilz S, Lindemann I, Damm C, Hufenbach J, Helth A, Geissler D, Henss A, Rohnke M, Calin M, Zimmermann M, Eckert J, Lee M, Gebert A. Powder metallurgical processing of low modulus β-type Ti-45Nb to bulk and macro-porous compacts. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.09.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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16
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Kar AS, Rao A, Sahu M, Kumar SS, Tomar BS. Recovery of plutonium and cerium from alumina crucible. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5542-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Göttlicher M, Rohnke M, Moryson Y, Thomas J, Sann J, Lode A, Schumacher M, Schmidt R, Pilz S, Gebert A, Gemming T, Janek J. Functionalization of Ti-40Nb implant material with strontium by reactive sputtering. Biomater Res 2017; 21:18. [PMID: 29046823 PMCID: PMC5634847 DOI: 10.1186/s40824-017-0104-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 09/28/2017] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Surface functionalization of orthopedic implants with pharmaceutically active agents is a modern approach to enhance osseointegration in systemically altered bone. A local release of strontium, a verified bone building therapeutic agent, at the fracture site would diminish side effects, which could occur otherwise by oral administration. Strontium surface functionalization of specially designed titanium-niobium (Ti-40Nb) implant alloy would provide an advanced implant system that is mechanically adapted to altered bone with the ability to stimulate bone formation. METHODS Strontium-containing coatings were prepared by reactive sputtering of strontium chloride (SrCl2) in a self-constructed capacitively coupled radio frequency (RF) plasma reactor. Film morphology, structure and composition were investigated by scanning electron microscopy (SEM), time of flight secondary ion mass spectrometry (ToF-SIMS) and X-ray photoelectron spectroscopy (XPS). High-resolution transmission electron microscopy (HR-TEM) was used for the investigation of thickness and growth direction of the product layer. TEM lamellae were prepared using the focused ion beam (FIB) technique. Bioactivity of the surface coatings was tested by cultivation of primary human osteoblasts and subsequent analysis of cell morphology, viability, proliferation and differentiation. The results are correlated with the amount of strontium that is released from the coating in biomedical buffer solution, quantified by inductively coupled plasma mass spectrometry (ICP-MS). RESULTS Dense coatings, consisting of SrOxCly, of more than 100 nm thickness and columnar structure, were prepared. TEM images of cross sections clearly show an incoherent but well-structured interface between coating and substrate without any cracks. Sr2+ is released from the SrOxCly coating into physiological solution as proven by ICP-MS analysis. Cell culture studies showed excellent biocompatibility of the functionalized alloy. CONCLUSIONS Ti-40Nb alloy, a potential orthopedic implant material for osteoporosis patients, could be successfully plasma coated with a dense SrOxCly film. The material performed well in in vitro tests. Nevertheless, the Sr2+ release must be optimized in future work to meet the requirements of an effective drug delivery system.
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Affiliation(s)
- Markus Göttlicher
- Institute of Physical Chemistry and Center of Materials Research, Justus-Liebig-University of Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Marcus Rohnke
- Institute of Physical Chemistry and Center of Materials Research, Justus-Liebig-University of Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Yannik Moryson
- Institute of Physical Chemistry and Center of Materials Research, Justus-Liebig-University of Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Jürgen Thomas
- IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Joachim Sann
- Institute of Physical Chemistry and Center of Materials Research, Justus-Liebig-University of Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Anja Lode
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine and University Hospital, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Matthias Schumacher
- Centre for Translational Bone, Joint and Soft Tissue Research, Faculty of Medicine and University Hospital, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Romy Schmidt
- IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Stefan Pilz
- IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Annett Gebert
- IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Thomas Gemming
- IFW Dresden, Institute for Complex Materials, Helmholtzstrasse 20, 01069 Dresden, Germany
| | - Jürgen Janek
- Institute of Physical Chemistry and Center of Materials Research, Justus-Liebig-University of Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
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Markhoff J, Weinmann M, Schulze C, Bader R. Influence of different grained powders and pellets made of Niobium and Ti-42Nb on human cell viability. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 73:756-766. [PMID: 28183670 DOI: 10.1016/j.msec.2016.12.098] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 12/15/2016] [Accepted: 12/20/2016] [Indexed: 12/29/2022]
Abstract
Nowadays, biomaterials can be used to maintain or replace several functions of the human body if necessary. Titanium and its alloys, i.e. Ti6Al4V are the most common materials (70 to 80%) used for structural orthopedic implants due to their unique combination of good mechanical properties, corrosion resistance and biocompatibility. Addition of β-stabilizers, e.g. niobium, can improve the mechanical properties of such titanium alloys further, simultaneously offering excellent biocompatibility. In this in vitro study, human osteoblasts and fibroblasts were cultured on different niobium specimens (Nb Amperit, Nb Ampertec), Nb sheets and Ti-42Nb (sintered and 3D-printed by selective laser melting, SLM) and compared with forged Ti6Al4V specimens. Furthermore, human osteoblasts were incubated with particulates of the Nb and Ti-42Nb specimens in three concentrations over four and seven days to imitate influence of wear debris. Thereby, the specimens with the roughest surfaces, i.e. Ti-42Nb and Nb Ampertec, revealed excellent and similar results for both cell types concerning cell viability and collagen synthesis superior to forged Ti6Al4V. Examinations with particulate debris disclosed a dose-dependent influence of all powders with Nb Ampertec showing the highest decrease of cell viability and collagen synthesis. Furthermore, interleukin synthesis was only slightly increased for all powders. In summary, Nb Ampertec (sintered Nb) and Ti-42Nb materials seem to be promising alternatives for medical applications compared to common materials like forged or melted Ti6Al4V.
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Affiliation(s)
- Jana Markhoff
- University Medicine Rostock, Department of Orthopedics, Biomechanics and Implant Technology Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany.
| | - Markus Weinmann
- H.C. Starck Tantalum and Niobium GmbH, Im Schleeke 78-91, 38642 Goslar, Germany
| | - Christian Schulze
- University Medicine Rostock, Department of Orthopedics, Biomechanics and Implant Technology Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
| | - Rainer Bader
- University Medicine Rostock, Department of Orthopedics, Biomechanics and Implant Technology Laboratory, Doberaner Strasse 142, 18057 Rostock, Germany
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19
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Biomaterials-Potential nucleation agents in blood and possible implications. Biointerphases 2016; 11:029901. [PMID: 27316221 DOI: 10.1116/1.4954191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Blood, simulated body fluids, and many cell culture media are supersaturated solutions with respect to several calcium phosphates. Therefore biomaterials can act as nucleation agents and evoke heterogeneous nucleation of salts on the surface of immersed biomaterials. Depending on the field of application, this can be either beneficial or disadvantageous. Although nucleation from supersaturated solutions is an old and well-known scientific phenomenon it is not standard to test new developed materials with surface analytical methods for their ability to initiate nucleation in vitro. Therefore, this communication aims to review the mineralization effect and to emphasize the possible negative implications, especially to functionalized bone implants. Surface coatings with proteins, growth factors, and, etc., can become ineffective due to deposition of a dense calcium phosphate layer. In the case of drug loaded implants, drug release might be inhibited.
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20
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Lakshmi RV, Bera P, Anandan C. Surface treatment and its effect on the electrochemical behavior of Ti–15Mo–3Nb–3Al alloy. RSC Adv 2016. [DOI: 10.1039/c6ra00934d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effect of alkaline and acidic treatments on the surface morphology, chemical composition and electrochemical behavior of Ti β–21S alloy is studied. Also, the role of GPTMS–TIP sol–gel coating in obviating the effects is explored.
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Affiliation(s)
- R. V. Lakshmi
- CSIR-National Aerospace Laboratories
- Bangalore 560017
- India
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21
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Mestieri LB, Tanomaru-Filho M, Gomes-Cornélio AL, Salles LP, Bernardi MIB, Guerreiro-Tanomaru JM. Radiopacity and cytotoxicity of Portland cement associated with niobium oxide micro and nanoparticles. J Appl Oral Sci 2015; 22:554-9. [PMID: 25591023 PMCID: PMC4307770 DOI: 10.1590/1678-775720140209] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 09/03/2014] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE Mineral Trioxide Aggregate (MTA) is composed of Portland Cement (PC) and bismuth oxide (BO). Replacing BO for niobium oxide (NbO) microparticles (Nbµ) or nanoparticles (Nbη) may improve radiopacity and bioactivity. The aim of this study was to evaluate the radiopacity and cytotoxicity of the materials: (1) PC; (2) White MTA; (3) PC+30% Nbµ; (4) PC+30% Nbη. MATERIAL AND METHODS For the radiopacity test, specimens of the different materials were radiographed along an aluminum step-wedge. For cell culture assays, Saos-2 osteoblastic-cells (ATCC HTB-85) were used. Cell viability was evaluated through MTT assay, and bioactivity was assessed by alkaline phosphatase activity assay. RESULTS The results demonstrated higher radiopacity for MTA, followed by Nbµ and Nbη, which had similar values. Cell culture analysis showed that PC and PC+NbO associations promoted greater cell viability than MTA. CONCLUSIONS It was concluded that the combination of PC+NbO is a potential alternative for composition of MTA.
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Affiliation(s)
- Leticia Boldrin Mestieri
- Department of Restorative Dentistry, Araraquara Dental School, Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Mário Tanomaru-Filho
- Department of Restorative Dentistry, Araraquara Dental School, Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Ana Livia Gomes-Cornélio
- Department of Restorative Dentistry, Araraquara Dental School, Univ. Estadual Paulista, Araraquara, SP, Brazil
| | - Loise Pedrosa Salles
- Department of Restorative Dentistry, Araraquara Dental School, Univ. Estadual Paulista, Araraquara, SP, Brazil
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Fojt J, Joska L, Malek J, Sefl V. Corrosion behavior of Ti-39Nb alloy for dentistry. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:532-7. [PMID: 26249624 DOI: 10.1016/j.msec.2015.07.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 06/10/2015] [Accepted: 07/13/2015] [Indexed: 11/28/2022]
Abstract
To increase an orthopedic implant's lifetime, researchers are now concerned on the development of new titanium alloys with suitable mechanical properties (low elastic modulus-high fatigue strength), corrosion resistance and good workability. Corrosion resistance of the newly developed titanium alloys should be comparable with that of pure titanium. The effect of medical preparations containing fluoride ions represents a specific problem related to the use of titanium based materials in dentistry. The aim of this study was to determine the corrosion behavior of β titanium alloy Ti-39Nb in physiological saline solution and in physiological solution containing fluoride ions. Corrosion behavior was studied using standard electrochemical techniques and X-ray photoelectron spectroscopy. It was found that corrosion properties of the studied alloy were comparable with the properties of titanium grade 2. The passive layer was based on the oxides of titanium and niobium in several oxidation states. Alloying with niobium, which was the important part of the alloy passive layer, resulted in no significant changes of corrosion behavior. In the presence of fluoride ions, the corrosion resistance was higher than the resistance of titanium.
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Affiliation(s)
- Jaroslav Fojt
- Institute of Chemical Technology, Technicka 5, 166 28 Prague, Czech Republic.
| | - Ludek Joska
- Institute of Chemical Technology, Technicka 5, 166 28 Prague, Czech Republic
| | - Jaroslav Malek
- UJP Praha, Nad Kamínkou 1345, 156 10 Prague-Zbraslav, Czech Republic
| | - Vaclav Sefl
- Institute of Chemical Technology, Technicka 5, 166 28 Prague, Czech Republic
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23
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Bai Y, Deng Y, Zheng Y, Li Y, Zhang R, Lv Y, Zhao Q, Wei S. Characterization, corrosion behavior, cellular response and in vivo bone tissue compatibility of titanium-niobium alloy with low Young's modulus. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 59:565-576. [PMID: 26652409 DOI: 10.1016/j.msec.2015.10.062] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 10/02/2015] [Accepted: 10/20/2015] [Indexed: 11/17/2022]
Abstract
β-Type titanium alloys with a low elastic modulus are a potential strategy to enhance bone remodeling and to mitigate the concern over the risks of osteanabrosis and bone resorption caused by stress shielding, when used to substitute irreversibly impaired hard tissue. Hence, in this study, a Ti-45Nb alloy with low Young's modulus and high strength was developed, and microstructure, mechanical properties, corrosion behaviors, cytocompatibility and in vivo osteo-compatibility of the alloy were systematically investigated for the first time. The results of mechanical tests showed that Young's modulus of the Ti-Nb alloy was reduced to about 64.3GPa (close to human cortical bone) accompanied with higher tensile strength and hardness compared with those of pure Ti. Importantly, the Ti-Nb alloy exhibited superior corrosion resistance to Ti in different solutions including SBF, MAS and FAAS (MAS containing NaF) media. In addition, the Ti-Nb alloy produced no deleterious effect to L929 and MG-63 cells, and cells performed excellent cell attachment onto Ti-Nb surface, indicating a good in vitro cytocompatibility. In vivo evaluations indicated that Ti-Nb had comparable bone tissue compatibility to Ti determined from micro-CT and histological evaluations. The Ti-Nb alloy with an elasticity close to human bone, thus, could be suitable for orthopedic/dental applications.
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Affiliation(s)
- Yanjie Bai
- Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, School and Hospital of Stomatology, Peking University, Beijing 100081, China; Department of Stomatology, Aviation General Hospital of China Medical University and Beijing Institute of Translational Medicine, Chinese Academy of Science, Beijing 100012, China
| | - Yi Deng
- Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, School and Hospital of Stomatology, Peking University, Beijing 100081, China; Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Yunfei Zheng
- Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, School and Hospital of Stomatology, Peking University, Beijing 100081, China
| | - Yongliang Li
- Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, School and Hospital of Stomatology, Peking University, Beijing 100081, China
| | - Ranran Zhang
- Department of Stomatology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Yalin Lv
- Department of Stomatology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Qiang Zhao
- Department of Stomatology, Aviation General Hospital of China Medical University and Beijing Institute of Translational Medicine, Chinese Academy of Science, Beijing 100012, China.
| | - Shicheng Wei
- Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, School and Hospital of Stomatology, Peking University, Beijing 100081, China; Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China.
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25
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Bortoluzzi M, Hayatifar M, Marchetti F, Pampaloni G, Zacchini S. Synthesis of α-amino acidato derivatives of niobium and tantalum pentahalides and their conversion into iminium salts. Inorg Chem 2015; 54:4047-55. [PMID: 25844933 DOI: 10.1021/acs.inorgchem.5b00286] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Dinuclear complexes of formula Nb2Cl9[O2CCH(R)NR'R″2-κO,κO] (R = CH2CHMe2, R' = R″ = H, 1a; R = CH2Ph, R' = R″ = H, 1b; R = CH2CH2SCH3, R' = R″ = H, 1c; R = R' = H, R″ = Me, 1d; R = CH2Ph, R' = R″ = Me, 1e; Nb2Cl9[O2C⌈CH(CH2)3NH⌉], 1f) were prepared by allowing NbCl5 to react in dichloromethane with the appropriate α-amino acid in 1:2 amino acid/Nb molar ratio. The 1:1 reactions between MX5 (M = Nb, Ta; X = Cl, Br) and a series of α-amino acids resulted in the formation of the iminium salts [(R)CH═NR'R″2][MX6] (R = CH2Ph, R' = R″ = Me: M = Nb, X = Cl, 2a; M = Nb, X = Br, 2b; M = Ta, X = Cl, 2c; M = Ta, X = Br, 2d; R = CH2Ph, R' = R″ = H, M = Nb: X = Cl, 3a; X = Br, 3b; R = CH2CHMe2, R' = R″ = H, M = Nb, X = Cl, 4; R = R' = H, R″ = Me, M = Nb, X = Cl, 5). The formate/amino acidate derivative NbCl3(O2CH)[O2CCH(CH2Ph)NMe2], 6, was isolated and identified as coproduct of the 1:1 reaction between NbCl5 and N,N-dimethyl-l-phenylalanine, leading to 2a. All of the compounds were characterized by analytical and spectroscopic methods and by X-ray diffractometry in the cases of 2a, 2b, and 2d. Moreover, density functional theory studies were carried out to shed light on mechanistic and structural aspects.
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Affiliation(s)
- Marco Bortoluzzi
- †Dipartimento di Scienze Molecolari e Nanosistemi, Ca' Foscari Università di Venezia, Dorsoduro 2137, 30123 Venezia, Italy
| | - Mohammad Hayatifar
- §Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Fabio Marchetti
- ‡Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 3, I-56124 Pisa, Italy
| | - Guido Pampaloni
- ‡Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 3, I-56124 Pisa, Italy
| | - Stefano Zacchini
- §Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
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Abdi S, Oswald S, Gostin PF, Helth A, Sort J, Baró MD, Calin M, Schultz L, Eckert J, Gebert A. Designing new biocompatible glass-forming Ti75-
x
Zr10
Nb
x
Si15
(x
= 0, 15) alloys: corrosion, passivity, and apatite formation. J Biomed Mater Res B Appl Biomater 2015; 104:27-38. [DOI: 10.1002/jbm.b.33332] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/06/2014] [Accepted: 11/04/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Somayeh Abdi
- IFW Dresden; D-01171 Dresden Germany
- TU Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | | | | | - Arne Helth
- IFW Dresden; D-01171 Dresden Germany
- TU Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Jordi Sort
- Institució Catalana de Recerca i Estudis Avançats; Universitat Autònoma de Barcelona; E-08193 Bellaterra Spain
- Facultat de Ciències; Departament de Física; Universitat Autònoma de Barcelona; E-08193 Bellaterra Spain
| | - Maria Dolors Baró
- Facultat de Ciències; Departament de Física; Universitat Autònoma de Barcelona; E-08193 Bellaterra Spain
| | | | - Ludwig Schultz
- IFW Dresden; D-01171 Dresden Germany
- TU Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
| | - Jürgen Eckert
- IFW Dresden; D-01171 Dresden Germany
- TU Dresden; Institut für Werkstoffwissenschaft; D-01062 Dresden Germany
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Calin M, Helth A, Gutierrez Moreno JJ, Bönisch M, Brackmann V, Giebeler L, Gemming T, Lekka CE, Gebert A, Schnettler R, Eckert J. Elastic softening of β-type Ti–Nb alloys by indium (In) additions. J Mech Behav Biomed Mater 2014; 39:162-74. [DOI: 10.1016/j.jmbbm.2014.07.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 07/01/2014] [Accepted: 07/15/2014] [Indexed: 10/25/2022]
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Woltmann B, Torger B, Müller M, Hempel U. Interaction between immobilized polyelectrolyte complex nanoparticles and human mesenchymal stromal cells. Int J Nanomedicine 2014; 9:2205-15. [PMID: 24855357 PMCID: PMC4020901 DOI: 10.2147/ijn.s61198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Implant loosening or deficient osseointegration is a major problem in patients with systemic bone diseases (eg, osteoporosis). For this reason, the stimulation of the regional cell population by local and sustained drug delivery at the bone/implant interface to induce the formation of a mechanical stable bone is promising. The purpose of this study was to investigate the interaction of polymer-based nanoparticles with human bone marrow-derived cells, considering nanoparticles' composition and surface net charge. MATERIALS AND METHODS Polyelectrolyte complex nanoparticles (PECNPs) composed of the polycations poly(ethyleneimine) (PEI), poly(L-lysine) (PLL), or (N,N-diethylamino)ethyldextran (DEAE) in combination with the polyanions dextran sulfate (DS) or cellulose sulfate (CS) were prepared. PECNPs' physicochemical properties (size, net charge) were characterized by dynamic light scattering and particle charge detector measurements. Biocompatibility was investigated using human mesenchymal stromal cells (hMSCs) cultured on immobilized PECNP films (5-50 nmol·cm(-2)) by analysis for metabolic activity of hMSCs in dependence of PECNP surface concentration by MTS (3-[4,5-dimethylthiazol-2-yl]-5-[3-carboxymethoxyphenyl]-2-[4-sulfophenyl]-2H-tetrazolium, inner salt) assay, as well as cell morphology (phase contrast microscopy). RESULTS PECNPs ranging between ~50 nm and 150 nm were prepared. By varying the ratio of polycations and polyanions, PECNPs with a slightly positive (PEC(+)NP) or negative (PEC(-)NP) net charge were obtained. The PECNP composition significantly affected cell morphology and metabolic activity, whereas the net charge had a negligible influence. Therefore, we classified PECNPs into "variant systems" featuring a significant dose dependency of metabolic activity (DEAE/CS, PEI/DS) and "invariant systems" lacking such a dependency (DEAE/DS, PEI/CS). Immunofluorescence imaging of fluorescein isothiocyanate isomer I (FITC)-labeled PECNPs suggested internalization into hMSCs remaining stable for 8 days. CONCLUSION Our study demonstrated that PECNP composition affects hMSC behavior. In particular, the PEI/CS system showed biocompatibility in a wide concentration range, representing a suitable system for local drug delivery from PECNP-functionalized bone substitute materials.
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Affiliation(s)
- Beatrice Woltmann
- Dresden University of Technology, Faculty of Medicine Carl Gustav Carus, Institute of Physiological Chemistry, Dresden, Germany
| | - Bernhard Torger
- Leibniz Institute of Polymer Research Dresden, Department of Polyelectrolytes and Dispersions, Dresden, Germany
- Dresden University of Technology, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Martin Müller
- Leibniz Institute of Polymer Research Dresden, Department of Polyelectrolytes and Dispersions, Dresden, Germany
- Dresden University of Technology, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Ute Hempel
- Dresden University of Technology, Faculty of Medicine Carl Gustav Carus, Institute of Physiological Chemistry, Dresden, Germany
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Marchetti F, Pampaloni G, Pinzino C, Zacchini S. Stable [M2F11]-(M = Nb, Ta) Salts of Protonated 1,3-Dimethoxybenzene. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300961] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Helth A, Gostin PF, Oswald S, Wendrock H, Wolff U, Hempel U, Arnhold S, Calin M, Eckert J, Gebert A. Chemical nanoroughening of Ti40Nb surfaces and its effect on human mesenchymal stromal cell response. J Biomed Mater Res B Appl Biomater 2013; 102:31-41. [PMID: 23846980 DOI: 10.1002/jbm.b.32976] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 03/27/2013] [Accepted: 04/21/2013] [Indexed: 12/25/2022]
Abstract
Samples of low modulus beta-type Ti40Nb and cp2-Ti were chemically treated with 98% H2 SO4 + 30% H2 O2 (vol. ratio 1:1) solution. Surface analytical studies conducted with HR-SEM, AFM, and XPS identified a characteristic nanoroughness of the alloy surface related with a network of nanopits of ∼25 nm diameter. This is very similar to that obtained for cp2-Ti. The treatment enhances the oxide layer growth compared to mechanically ground states and causes a strong enrichment of Nb2 O5 relative to TiO2 on the alloy surface. The in vitro analyses clearly indicated that the chemical treatment accelerates the adhesion and spreading of human mesenchymal stromal cells (hMSC), increases the metabolic activity, and the enzyme activity of tissue non-specific alkaline phosphatase (TNAP). Surface structures which were generated mimic the cytoplasmic projections of the cells on the nanoscale. Those effects are more pronounced for the Ti40Nb alloy than for cp2-Ti. The relation between alloy surface topography and chemistry and cell functions is discussed.
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Affiliation(s)
- A Helth
- Leibniz- IFW Dresden, Dresden, P.O. Box 270116, Dresden D-01171, Germany; TU Dresden, Institute of Materials Science, Dresden, D-01062, Germany
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Bortoluzzi M, Marchetti F, Pampaloni G, Pucino M, Zacchini S. Coordination complexes of NbX5 (X = F, Cl) with (N,O)- and (O,O)-donor ligands and the first X-ray characterization of a neutral NbF5 adduct. Dalton Trans 2013; 42:13054-64. [DOI: 10.1039/c3dt50930c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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