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Civantos A, Mesa-Restrepo A, Torres Y, Shetty AR, Cheng MK, Jaramillo-Correa C, Aditya T, Allain JP. Nanotextured porous titanium scaffolds by argon ion irradiation: Toward conformal nanopatterning and improved implant osseointegration. J Biomed Mater Res A 2023; 111:1850-1865. [PMID: 37334879 DOI: 10.1002/jbm.a.37582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 04/29/2023] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Stress shielding and osseointegration are two main challenges in bone regeneration, which have been targeted successfully by chemical and physical surface modification methods. Direct irradiation synthesis (DIS) is an energetic ion irradiation method that generates self-organized nanopatterns conformal to the surface of materials with complex geometries (e.g., pores on a material surface). This work exposes porous titanium samples to energetic argon ions generating nanopatterning between and inside pores. The unique porous architected titanium (Ti) structure is achieved by mixing Ti powder with given amounts of spacer NaCl particles (vol % equal to 30%, 40%, 50%, 60%, and 70%), compacted and sintered, and combined with DIS to generate a porous Ti with bone-like mechanical properties and hierarchical topography to enhance Ti osseointegration. The porosity percentages range between 25% and 30% using 30 vol % NaCl space-holder (SH) volume percentages to porosity rates of 63%-68% with SH volume of 70 vol % NaCl. Stable and reproducible nanopatterning on the flat surface between pores, inside pits, and along the internal pore walls are achieved, for the first time on any porous biomaterial. Nanoscale features were observed in the form of nanowalls and nanopeaks of lengths between 100 and 500 nm, thicknesses of 35-nm and heights between 100 and 200 nm on average. Bulk mechanical properties that mimic bone-like structures were observed along with increased wettability (by reducing contact values). Nano features were cell biocompatible and enhanced in vitro pre-osteoblast differentiation and mineralization. Higher alkaline phosphatase levels and increased calcium deposits were observed on irradiated 50 vol % NaCl samples at 7 and 14 days. After 24 h, nanopatterned porous samples decreased the number of attached macrophages and the formation of foreign body giant cells, confirming nanoscale tunability of M1-M2 immuno-activation with enhanced osseointegration.
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Affiliation(s)
- Ana Civantos
- Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Nick Holonyak, Jr., Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Andrea Mesa-Restrepo
- Department of Biomedical Engineering, Pennsylvania State University, State College, Pennsylvania, USA
| | - Yadir Torres
- Department of Engineering and Materials Science and Transport, University of Seville, Seville, Spain
| | - Akshath R Shetty
- Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Ming Kit Cheng
- Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Camilo Jaramillo-Correa
- Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- The Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, State College, Pennsylvania, USA
| | - Teresa Aditya
- The Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, State College, Pennsylvania, USA
| | - Jean Paul Allain
- Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Nick Holonyak, Jr., Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Biomedical Engineering, Pennsylvania State University, State College, Pennsylvania, USA
- The Ken and Mary Alice Lindquist Department of Nuclear Engineering, Pennsylvania State University, State College, Pennsylvania, USA
- Department of Materials Science and Engineering, Pennsylvania State University, State College, Pennsylvania, USA
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2
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Martínez G, Begines B, Pajuelo E, Vázquez J, Rodriguez-Albelo LM, Cofini D, Torres Y, Alcudia A. Versatile Biodegradable Poly(acrylic acid)-Based Hydrogels Infiltrated in Porous Titanium Implants to Improve the Biofunctional Performance. Biomacromolecules 2023; 24:4743-4758. [PMID: 37677155 PMCID: PMC10646965 DOI: 10.1021/acs.biomac.3c00532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 08/27/2023] [Indexed: 09/09/2023]
Abstract
This research work proposes a synergistic approach to improve implants' performance through the use of porous Ti substrates to reduce the mismatch between Young's modulus of Ti (around 110 GPa) and the cortical bone (20-25 GPa), and the application of a biodegradable, acrylic acid-based polymeric coating to reduce bacterial adhesion and proliferation, and to enhance osseointegration. First, porous commercially pure Ti substrates with different porosities and pore size distributions were fabricated by using space-holder techniques to obtain substrates with improved tribomechanical behavior. On the other hand, a new diacrylate cross-linker containing a reduction-sensitive disulfide bond was synthesized to prepare biodegradable poly(acrylic acid)-based hydrogels with 1, 2, and 4% cross-linker. Finally, after the required characterization, both strategies were implemented, and the combination of 4% cross-linked poly(acrylic acid)-based hydrogel infiltrated in 30 vol % porosity, 100-200 μm average pore size, was revealed as an outstanding choice for enhancing implant performance.
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Affiliation(s)
- Guillermo Martínez
- Departamento
de Química Orgánica y Farmacéutica, Facultad
de Farmacia, Universidad de Sevilla, Seville 41012, Spain
| | - Belén Begines
- Departamento
de Química Orgánica y Farmacéutica, Facultad
de Farmacia, Universidad de Sevilla, Seville 41012, Spain
| | - Eloisa Pajuelo
- Departamento
de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Seville 41012, Spain
| | - Juan Vázquez
- Departamento
de Química Orgánica, Facultad de Química, Universidad de Sevilla, Seville 41004, Spain
| | - Luisa Marleny Rodriguez-Albelo
- Departamento
de Ingeniería y Ciencia de los Materiales y del Transporte,
Escuela Politécnica Superior, Universidad
de Sevilla, Seville 41011, Spain
| | - Davide Cofini
- Departamento
de Química Orgánica y Farmacéutica, Facultad
de Farmacia, Universidad de Sevilla, Seville 41012, Spain
| | - Yadir Torres
- Departamento
de Ingeniería y Ciencia de los Materiales y del Transporte,
Escuela Politécnica Superior, Universidad
de Sevilla, Seville 41011, Spain
| | - Ana Alcudia
- Departamento
de Química Orgánica y Farmacéutica, Facultad
de Farmacia, Universidad de Sevilla, Seville 41012, Spain
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3
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Begines B, Arevalo C, Romero C, Hadzhieva Z, Boccaccini AR, Torres Y. Fabrication and Characterization of Bioactive Gelatin-Alginate-Bioactive Glass Composite Coatings on Porous Titanium Substrates. ACS APPLIED MATERIALS & INTERFACES 2022; 14:15008-15020. [PMID: 35316017 PMCID: PMC8990524 DOI: 10.1021/acsami.2c01241] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this research work, the fabrication of biphasic composite implants has been investigated. Porous, commercially available pure Ti (50 vol % porosity and pore distributions of 100-200, 250-355, and 355-500 μm) has been used as a cortical bone replacement, while different composites based on a polymer blend (gelatin and alginate) and bioactive glass (BG) 45S5 have been applied as a soft layer for cartilage tissues. The microstructure, degradation rates, biofunctionality, and wear behavior of the different composites were analyzed to find the best possible coating. Experiments demonstrated the best micromechanical balance for the substrate containing 200-355 μm size range distribution. In addition, although the coating prepared from alginate presented a lower mass loss, the composite containing 50% alginate and 50% gelatin showed a higher elastic recovery, which entails that this type of coating could replicate the functions of the soft tissue in areas of the joints. Therefore, results revealed that the combinations of porous commercially pure Ti and composites prepared from alginate/gelatin/45S5 BG are candidates for the fabrication of biphasic implants not only for the treatment of osteochondral defects but also potentially for any other diseases affecting simultaneously hard and soft tissues.
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Affiliation(s)
- Belen Begines
- Departamento
de Química Orgánica y Farmacéutica, Facultad
de Farmacia, Universidad de Sevilla, c/ Profesor García González
2, Seville 41012, Spain
| | - Cristina Arevalo
- Departamento
de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, c/ Virgen de África 7, Seville 41011, Spain
| | - Carlos Romero
- Departamento
de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, c/ Virgen de África 7, Seville 41011, Spain
- Department
of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Av. de la Universidad 30, Leganés, Madrid 28911, Spain
| | - Zoya Hadzhieva
- Institute
of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstraße 6, Erlangen 91058, Germany
| | - Aldo R. Boccaccini
- Institute
of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstraße 6, Erlangen 91058, Germany
| | - Yadir Torres
- Departamento
de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, c/ Virgen de África 7, Seville 41011, Spain
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4
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Ishmukhametov I, Batasheva S, Rozhina E, Akhatova F, Mingaleeva R, Rozhin A, Fakhrullin R. DNA/Magnetic Nanoparticles Composite to Attenuate Glass Surface Nanotopography for Enhanced Mesenchymal Stem Cell Differentiation. Polymers (Basel) 2022; 14:344. [PMID: 35054750 PMCID: PMC8779295 DOI: 10.3390/polym14020344] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/22/2021] [Accepted: 12/31/2021] [Indexed: 02/07/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have extensive pluripotent potential to differentiate into various cell types, and thus they are an important tool for regenerative medicine and biomedical research. In this work, the differentiation of hTERT-transduced adipose-derived MSCs (hMSCs) into chondrocytes, adipocytes and osteoblasts on substrates with nanotopography generated by magnetic iron oxide nanoparticles (MNPs) and DNA was investigated. Citrate-stabilized MNPs were synthesized by the chemical co-precipitation method and sized around 10 nm according to microscopy studies. It was shown that MNPs@DNA coatings induced chondrogenesis and osteogenesis in hTERT-transduced MSCs. The cells had normal morphology and distribution of actin filaments. An increase in the concentration of magnetic nanoparticles resulted in a higher surface roughness and reduced the adhesion of cells to the substrate. A glass substrate modified with magnetic nanoparticles and DNA induced active chondrogenesis of hTERT-transduced MSC in a twice-diluted differentiation-inducing growth medium, suggesting the possible use of nanostructured MNPs@DNA coatings to obtain differentiated cells at a reduced level of growth factors.
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Affiliation(s)
| | | | - Elvira Rozhina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, 420008 Kazan, Republic of Tatarstan, Russian Federation; (I.I.); (S.B.); (F.A.); (R.M.); (A.R.)
| | | | | | | | - Rawil Fakhrullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml uramı 18, 420008 Kazan, Republic of Tatarstan, Russian Federation; (I.I.); (S.B.); (F.A.); (R.M.); (A.R.)
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5
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García-Cabezón C, Godinho V, Salvo-Comino C, Torres Y, Martín-Pedrosa F. Improved Corrosion Behavior and Biocompatibility of Porous Titanium Samples Coated with Bioactive Chitosan-Based Nanocomposites. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6322. [PMID: 34771848 PMCID: PMC8585141 DOI: 10.3390/ma14216322] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 11/18/2022]
Abstract
Porous titanium implants can be a good solution to solve the stress shielding phenomenon. However, the presence of pores compromises mechanical and corrosion resistance. In this work, porous titanium samples obtained using a space-holder technique are coated with Chitosan, Chitosan/AgNPs and Chitosan/Hydroxyapatite using only one step and an economic electrodeposition method. The coatings' topography, homogeneity and chemical composition were analyzed. A study of the effect of the porosity and type of coating on corrosion resistance and cellular behavior was carried out. The electrochemical studies reveal that porous samples show high current densities and an unstable oxide film; therefore, there is a need for surface treatments to improve corrosion resistance. The Chitosan coatings provide a significant improvement in the corrosion resistance, but the Chitosan/AgNPs and Chitosan/HA coatings showed the highest protection efficiency, especially for the more porous samples. Furthermore, these coatings have better adherence than the chitosan coatings, and the higher surface roughness obtained favors cell adhesion and proliferation. Finally, a combination of coating and porous substrate material with the best biomechanical balance and biofunctional behavior is proposed as a potential candidate for the replacement of small, damaged bone tissues.
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Affiliation(s)
- Cristina García-Cabezón
- Departamento de Ciencia de Materiales e Ingeniería Metalúrgica, Escuela de Ingenierías Industriales, Universidad de Valladolid, Calle Paseo del Cace 59, 47011 Valladolid, Spain;
| | - Vanda Godinho
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Calle Virgen de África 7, 41011 Sevilla, Spain; (V.G.); (Y.T.)
| | - Coral Salvo-Comino
- Departamento de Química Inorgánica, Escuela de Ingenierías Industriales, Universidad de Valladolid, Calle Paseo del Cace 59, 47011 Valladolid, Spain;
| | - Yadir Torres
- Departamento de Ingeniería y Ciencia de los Materiales y del Transporte, Escuela Politécnica Superior, Calle Virgen de África 7, 41011 Sevilla, Spain; (V.G.); (Y.T.)
| | - Fernando Martín-Pedrosa
- Departamento de Ciencia de Materiales e Ingeniería Metalúrgica, Escuela de Ingenierías Industriales, Universidad de Valladolid, Calle Paseo del Cace 59, 47011 Valladolid, Spain;
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6
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Khimich MA, Prosolov KA, Mishurova T, Evsevleev S, Monforte X, Teuschl AH, Slezak P, Ibragimov EA, Saprykin AA, Kovalevskaya ZG, Dmitriev AI, Bruno G, Sharkeev YP. Advances in Laser Additive Manufacturing of Ti-Nb Alloys: From Nanostructured Powders to Bulk Objects. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1159. [PMID: 33946726 PMCID: PMC8145374 DOI: 10.3390/nano11051159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/22/2021] [Accepted: 04/27/2021] [Indexed: 11/24/2022]
Abstract
The additive manufacturing of low elastic modulus alloys that have a certain level of porosity for biomedical needs is a growing area of research. Here, we show the results of manufacturing of porous and dense samples by a laser powder bed fusion (LPBF) of Ti-Nb alloy, using two distinctive fusion strategies. The nanostructured Ti-Nb alloy powders were produced by mechanical alloying and have a nanostructured state with nanosized grains up to 90 nm. The manufactured porous samples have pronounced open porosity and advanced roughness, contrary to dense samples with a relatively smooth surface profile. The structure of both types of samples after LPBF is formed by uniaxial grains having micro- and nanosized features. The inner structure of the porous samples is comprised of an open interconnected system of pores. The volume fraction of isolated porosity is 2 vol. % and the total porosity is 20 vol. %. Cell viability was assessed in vitro for 3 and 7 days using the MG63 cell line. With longer culture periods, cells showed an increased cell density over the entire surface of a porous Ti-Nb sample. Both types of samples are not cytotoxic and could be used for further in vivo studies.
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Affiliation(s)
- Margarita A. Khimich
- Laboratory of Nanobioengineering, Laboratory of Nanostructured Biocomposites, Laboratory of Computer-Aided Design of Materials, Institute of Strength Physics and Materials Science of SB RAS, 2/4, Akademicheskii pr., 634055 Tomsk, Russia; (M.A.K.); (K.A.P.); (Y.P.S.)
- Physics Technical Faculty, Tomsk Material Science Common Use Center, National Research Tomsk State University, 36, Lenina pr., 634050 Tomsk, Russia
| | - Konstantin A. Prosolov
- Laboratory of Nanobioengineering, Laboratory of Nanostructured Biocomposites, Laboratory of Computer-Aided Design of Materials, Institute of Strength Physics and Materials Science of SB RAS, 2/4, Akademicheskii pr., 634055 Tomsk, Russia; (M.A.K.); (K.A.P.); (Y.P.S.)
| | - Tatiana Mishurova
- Department of Non-Destructive Testing, Division 8.5 Micro NDE, Bundesanstalt für Materialforschung und -Prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany; (T.M.); (S.E.); (G.B.)
| | - Sergei Evsevleev
- Department of Non-Destructive Testing, Division 8.5 Micro NDE, Bundesanstalt für Materialforschung und -Prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany; (T.M.); (S.E.); (G.B.)
| | - Xavier Monforte
- Department of Life Science Engineering, University of Applied Sciences Technikum Wien, Höchstädtpl. 6, 1200 Vienna, Austria; (X.M.); (A.H.T.)
| | - Andreas H. Teuschl
- Department of Life Science Engineering, University of Applied Sciences Technikum Wien, Höchstädtpl. 6, 1200 Vienna, Austria; (X.M.); (A.H.T.)
| | - Paul Slezak
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, AUVA Research Center, Donaueschingenstraße 13, 1200 Vienna, Austria;
| | - Egor A. Ibragimov
- Material Science Department, Research School of Physics of High Energy Processes, National Research Tomsk Polytechnic University, Yurga Technical University TPU Affiliate, 30, Lenina pr., 634050 Tomsk, Russia; (E.A.I.); (A.A.S.); (Z.G.K.)
| | - Alexander A. Saprykin
- Material Science Department, Research School of Physics of High Energy Processes, National Research Tomsk Polytechnic University, Yurga Technical University TPU Affiliate, 30, Lenina pr., 634050 Tomsk, Russia; (E.A.I.); (A.A.S.); (Z.G.K.)
| | - Zhanna G. Kovalevskaya
- Material Science Department, Research School of Physics of High Energy Processes, National Research Tomsk Polytechnic University, Yurga Technical University TPU Affiliate, 30, Lenina pr., 634050 Tomsk, Russia; (E.A.I.); (A.A.S.); (Z.G.K.)
| | - Andrey I. Dmitriev
- Laboratory of Nanobioengineering, Laboratory of Nanostructured Biocomposites, Laboratory of Computer-Aided Design of Materials, Institute of Strength Physics and Materials Science of SB RAS, 2/4, Akademicheskii pr., 634055 Tomsk, Russia; (M.A.K.); (K.A.P.); (Y.P.S.)
| | - Giovanni Bruno
- Department of Non-Destructive Testing, Division 8.5 Micro NDE, Bundesanstalt für Materialforschung und -Prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany; (T.M.); (S.E.); (G.B.)
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Yurii P. Sharkeev
- Laboratory of Nanobioengineering, Laboratory of Nanostructured Biocomposites, Laboratory of Computer-Aided Design of Materials, Institute of Strength Physics and Materials Science of SB RAS, 2/4, Akademicheskii pr., 634055 Tomsk, Russia; (M.A.K.); (K.A.P.); (Y.P.S.)
- Material Science Department, Research School of Physics of High Energy Processes, National Research Tomsk Polytechnic University, Yurga Technical University TPU Affiliate, 30, Lenina pr., 634050 Tomsk, Russia; (E.A.I.); (A.A.S.); (Z.G.K.)
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7
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Biofunctionalization of Porous Ti Substrates Coated with Ag Nanoparticles for Potential Antibacterial Behavior. METALS 2021. [DOI: 10.3390/met11050692] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ti prosthesis have shown better biological compatibility, mechanical performance, and resistance to corrosion in cases of bone replacements. Nevertheless, fully dense Ti in connection with bone-host tissues show stress-shielding phenomenon that, together with the development of frequent undesirable microbial infections, may lead to implant failures. To overcome these issues, the present study aimed at the development of a novel combination of a chemically functionalized porous Ti substrate with a potentially therapeutic AgNPs coating. Fully dense and porous Ti substrates (30 and 60 vol.%, 100–200 and 355–500 μm, as spacer particles) were studied. Ti surface was treated with acid or basic medium followed by silanization and deposition of AgNPs by “submerged” and “in situ” methods. In general, for similar porosity, mechanical resistance decreased as pore size increased. Acidic reagent and submerged methodology were the best combination for fully dense Ti substrates. Hence, they were also employed for porous Ti substrates. Depending on the porosity of the substrates, variations can be observed both in the size and degree of agglomeration of the deposited AgNPs, entailing differences in the antibacterial behavior of the samples.
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Silva D, Guerra C, Muñoz H, Aguilar C, Walter M, Azocar M, Muñoz L, Gürbüz E, Ringuedé A, Cassir M, Sancy M. The effect of Staphylococcus aureus on the electrochemical behavior of porous Ti-6Al-4V alloy. Bioelectrochemistry 2020; 136:107622. [PMID: 32784103 DOI: 10.1016/j.bioelechem.2020.107622] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/22/2020] [Accepted: 07/23/2020] [Indexed: 11/30/2022]
Abstract
Ti-6Al-4V alloy has been widely investigated for biomedical applications due to its low density, high specific strength, and favorable corrosion resistance. However, some reported failures have imposed a challenge to improve bone regeneration and fixation, as well as antibacterial properties. A further opportunity for solving this problem is the introduction of porosity. However, this can induce metallic release and corrosion product formation. In this work, a Ti-6Al-4V alloy was exposed to Hank's solution, sterilized and inoculated with Staphylococcus aureus at 37 °C. Surface analysis was carried out by SEM-EDS and XPS. Electrochemical measurements were also performed using chronopotentiometry at open circuit potential, polarization curves, and electrochemical impedance spectroscopy. After exposure, FE-SEM showed some colonies of S. aureus on the sample with 22% porosity. However, XPS analysis revealed that the presence of bacterium influenced the composition of the oxide layer, even more drastically with the increase in added porosity. Moreover, the impedance analysis showed De Levie's behavior, revealing a reduction of pore resistance and modulus of the impedance in the low frequency range in inoculated medium, and polarization curves showed that the passivity potential range was decreased, whereas the passivity current increased in the presence of the S. aureus.
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Affiliation(s)
- Daniela Silva
- Escuela de Construcción Civil, Facultad de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile; Departamento de Ingeniería Metalúrgica y de Materiales, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
| | - Carolina Guerra
- Escuela de Construcción Civil, Facultad de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile; Departamento de Ingeniería Mecánica y Metalúrgica, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Hugo Muñoz
- Escuela de Construcción Civil, Facultad de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile
| | - Claudio Aguilar
- Departamento de Ingeniería Metalúrgica y de Materiales, Universidad Técnica Federico Santa María, Av. España 1680, Valparaíso, Chile
| | - Mariana Walter
- Departamento de Química de Materiales, Facultad de Química y Biología, Universidad de Santiago, Av. Libertador Bernardo ÓHiggins 3363, Santiago, Chile
| | - Manuel Azocar
- Departamento de Química de Materiales, Facultad de Química y Biología, Universidad de Santiago, Av. Libertador Bernardo ÓHiggins 3363, Santiago, Chile
| | - Lisa Muñoz
- Departamento de Química de Materiales, Facultad de Química y Biología, Universidad de Santiago, Av. Libertador Bernardo ÓHiggins 3363, Santiago, Chile
| | - Ersan Gürbüz
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie de Paris, 75005 Paris, France
| | - Armelle Ringuedé
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie de Paris, 75005 Paris, France
| | - Michel Cassir
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie de Paris, 75005 Paris, France
| | - Mamié Sancy
- Escuela de Construcción Civil, Facultad de Ingeniería, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile; Centro de Investigación en Nanotecnología y Materiales Avanzados "CIEN-UC", Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago, Chile
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9
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Raut HK, Das R, Liu Z, Liu X, Ramakrishna S. Biocompatibility of Biomaterials for Tissue Regeneration or Replacement. Biotechnol J 2020; 15:e2000160. [DOI: 10.1002/biot.202000160] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/19/2020] [Indexed: 12/25/2022]
Affiliation(s)
- Hemant Kumar Raut
- Division of Engineering Product Development Singapore University of Technology and Design 8 Somapah Rd Singapore 487372 Republic of Singapore
| | - Rupambika Das
- Division of Engineering Product Development Singapore University of Technology and Design 8 Somapah Rd Singapore 487372 Republic of Singapore
| | - Ziqian Liu
- Department of Mechanical Materials, and Manufacturing Engineering The University of Nottingham Ningbo, China 199 Taikang East Road Ningbo 315100 China
| | - Xiaoling Liu
- Department of Mechanical Materials, and Manufacturing Engineering The University of Nottingham Ningbo, China 199 Taikang East Road Ningbo 315100 China
| | - Seeram Ramakrishna
- Centre for Nanofibers and Nanotechnology Department of Mechanical Engineering National University of Singapore Singapore 117574 Singapore
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