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Witkowska J, Borowski T, Sowińska A, Choińska E, Moszczyńska D, Morgiel J, Sobiecki J, Wierzchoń T. Influence of Low Temperature Plasma Oxidizing on the Bioactivity of NiTi Shape Memory Alloy for Medical Applications. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6086. [PMID: 37763363 PMCID: PMC10533197 DOI: 10.3390/ma16186086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/24/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023]
Abstract
The present study elucidates the impact of glow discharge oxidation within a low-temperature plasma environment on the bioactivity characteristics of an NiTi shape memory alloy. The properties of the produced surface layers, such as structure (TEM observations), surface morphology (SEM observations), chemical and phase composition (EDS and XRD measurements), wettability (optical gonimeter), and the biological response of osteoblasts and platelets to the oxidized surface compared with the NiTi alloy without a surface layer are presented. The presented surface modification of the NiTi shape memory alloy, achieved through oxidizing in a low-temperature plasma environment, led to the creation of a continuous surface layer composed of nanocrystalline titanium oxide TiO2 (rutile). The findings obtained from this study provide evidence that the oxidized layer augments the bioactivity of the shape memory alloy. This augmentation was substantiated through the spontaneous biomimetic deposition of apatite from a simulated body fluid (SBF) solution. Furthermore, the modified surface exhibited improved osteoblast proliferation, and enhanced platelet adhesion and activation. This proposed surface modification strategy holds promise as a prospective solution to enhance the biocompatibility and bioactivity of NiTi shape memory alloy intended for prolonged use in bone implant applications.
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Affiliation(s)
- Justyna Witkowska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
| | - Tomasz Borowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
| | - Agnieszka Sowińska
- Pathology Department, Children’s Memorial Health Institute, 04-730 Warsaw, Poland;
| | - Emilia Choińska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
| | - Dorota Moszczyńska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
| | - Jerzy Morgiel
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 30-059 Krakow, Poland;
| | - Jerzy Sobiecki
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
| | - Tadeusz Wierzchoń
- Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland; (T.B.); (E.C.); (D.M.); (J.S.); (T.W.)
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Witkowska J, Sowińska A, Czarnowska E, Płociński T, Rajchel B, Tarnowski M, Wierzchoń T. Structure and properties of composite surface layers produced on NiTi shape memory alloy by a hybrid method. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:110. [PMID: 30019236 PMCID: PMC6061091 DOI: 10.1007/s10856-018-6118-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 07/04/2018] [Indexed: 06/08/2023]
Abstract
A hybrid process that combines oxidation under glow-discharge conditions with ion beam-assisted deposition (IBAD) has been applied to mechanically polished NiTi shape memory alloy in order to produce composite surface layers consisting of a TiO2 layer and an external carbon coating with an addition of silver. The produced surface layers a-C(Ag) + TiO2 type have shown increased surface roughness, improved corrosion resistance, altered wettability, and surface free energy, as well as reduced platelet adhesion, aggregation, and activation in comparison to NiTi alloy in initial state. Such characteristics can be of great benefit for cardiac applications.
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Affiliation(s)
- Justyna Witkowska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland.
| | - Agnieszka Sowińska
- Pathology Department, Children's Memorial Health Institute, Dzieci Polskich 20, 04-730, Warsaw, Poland
| | - Elżbieta Czarnowska
- Pathology Department, Children's Memorial Health Institute, Dzieci Polskich 20, 04-730, Warsaw, Poland
| | - Tomasz Płociński
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Bogusław Rajchel
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31-342, Cracow, Poland
| | - Michał Tarnowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
| | - Tadeusz Wierzchoń
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507, Warsaw, Poland
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Witkowska J, Sowińska A, Czarnowska E, Płociński T, Kamiński J, Wierzchoń T. Hybrid a-CNH+TiO 2+TiN-type surface layers produced on NiTi shape memory alloy for cardiovascular applications. Nanomedicine (Lond) 2017; 12:2233-2244. [PMID: 28818003 DOI: 10.2217/nnm-2017-0092] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
AIM The goal was to improve the properties of NiTi shape memory alloy to make it suitable for cardiac applications. For this purpose, a hybrid a-CNH+TiO2+TiN-type surface layer was produced on NiTi alloy and characterized. MATERIALS & METHODS The NiTi alloy subjected to hybrid process combining low-temperature oxynitriding under glow discharge conditions and radio frequency chemical vapor deposition process was examined for microstructure, surface topography, corrosion resistance, wettability and surface-free energy, Ni ion release and platelets adhesion, aggregation and activation. RESULTS The hybrid surface layers showed slightly increased surface roughness, better corrosion resistance, a more hydrophobic nature, decreased surface free energy, smaller release of nickel ions and reduced platelets activation. CONCLUSION The produced layers could expand the range of NiTi medical applications.
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Affiliation(s)
- Justyna Witkowska
- Faculty of Materials Science & Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Agnieszka Sowińska
- Pathology Department, Children's Memorial Health Institute, Warsaw, Poland
| | | | - Tomasz Płociński
- Faculty of Materials Science & Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Janusz Kamiński
- Faculty of Materials Science & Engineering, Warsaw University of Technology, Warsaw, Poland
| | - Tadeusz Wierzchoń
- Faculty of Materials Science & Engineering, Warsaw University of Technology, Warsaw, Poland
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Skoog SA, Lu Q, Malinauskas RA, Sumant AV, Zheng J, Goering PL, Narayan RJ, Casey BJ. Effects of nanotopography on the in vitro hemocompatibility of nanocrystalline diamond coatings. J Biomed Mater Res A 2016; 105:253-264. [PMID: 27543370 DOI: 10.1002/jbm.a.35872] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 07/29/2016] [Accepted: 08/18/2016] [Indexed: 01/14/2023]
Abstract
Nanocrystalline diamond (NCD) coatings have been investigated for improved wear resistance and enhanced hemocompatibility of cardiovascular devices. The goal of this study was to evaluate the effects of NCD surface nanotopography on in vitro hemocompatibility. NCD coatings with small (NCD-S) and large (NCD-L) grain sizes were deposited using microwave plasma chemical vapor deposition and characterized using scanning electron microscopy, atomic force microscopy, contact angle testing, and Raman spectroscopy. NCD-S coatings exhibited average grain sizes of 50-80 nm (RMS 5.8 nm), while NCD-L coatings exhibited average grain sizes of 200-280 nm (RMS 23.1 nm). In vitro hemocompatibility testing using human blood included protein adsorption, hemolysis, nonactivated partial thromboplastin time, platelet adhesion, and platelet activation. Both NCD coatings demonstrated low protein adsorption, a nonhemolytic response, and minimal activation of the plasma coagulation cascade. Furthermore, the NCD coatings exhibited low thrombogenicity with minimal platelet adhesion and aggregation, and similar morphological changes to surface-bound platelets (i.e., activation) in comparison to the HDPE negative control material. For all assays, there were no significant differences in the blood-material interactions of NCD-S versus NCD-L. The two tested NCD coatings, regardless of nanotopography, had similar hemocompatibility profiles compared to the negative control material (HDPE) and should be further evaluated for use in blood-contacting medical devices. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 253-264, 2017.
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Affiliation(s)
- Shelby A Skoog
- Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Raleigh, North Carolina.,Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - Qijin Lu
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - Richard A Malinauskas
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - Anirudha V Sumant
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois
| | - Jiwen Zheng
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - Peter L Goering
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - Roger J Narayan
- Joint Department of Biomedical Engineering, University of North Carolina and North Carolina State University, Raleigh, North Carolina
| | - Brendan J Casey
- Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
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