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Wang R, Li J, Bi Q, Yang B, He T, Lin K, Zhu X, Zhang K, Jin R, Huang C, Nie Y, Zhang X. Crystallographic plane-induced selective mineralization of nanohydroxyapatite on fibrous-grained titanium promotes osteointegration and biocorrosion resistance. Biomaterials 2025; 313:122800. [PMID: 39241551 DOI: 10.1016/j.biomaterials.2024.122800] [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: 02/03/2024] [Revised: 08/21/2024] [Accepted: 09/01/2024] [Indexed: 09/09/2024]
Abstract
The (002) crystallographic plane-oriented hydroxyapatite (HA) and anatase TiO2 enable favorable hydrophilicity, osteogenesis, and biocorrosion resistance. Thus, the crystallographic plane control in HA coating and crystalline phase control in TiO2 is vital to affect the surface and interface bioactivity and biocorrosion resistance of titanium (Ti) implants. However, a corresponding facile and efficient fabrication method is absent to realize the HA(002) mineralization and anatase TiO2 formation on Ti. Herein, we utilized the predominant Ti(0002) plane of the fibrous-grained titanium (FG Ti) to naturally form anatase TiO2 and further achieve a (002) basal plane oriented nanoHA (nHA) film through an in situ mild hydrothermal growth strategy. The formed FG Ti-nHA(002) remarkably improved hydrophilicity, mineralization, and biocorrosion resistance. Moreover, the nHA(002) film reserved the microgroove-like topological structure on FG Ti. It could enhance osteogenic differentiation through promoted contact guidance, showing one order of magnitude higher expression of osteogenic-related genes. On the other hand, the nHA(002) film restrained the osteoclast activity by blocking actin ring formation. Based on these capacities, FG Ti-nHA(002) improved new bone growth and binding strength in rabbit femur implantation, achieving satisfactory osseointegration within 2 weeks.
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Affiliation(s)
- Ruohan Wang
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Juan Li
- Department of Orthodontics, West China School of Stomatology, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Qunjie Bi
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Binbin Yang
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China; The Affiliated Stomatological Hospital, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Ting He
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Kaifeng Lin
- Department of Orthodontics, West China School of Stomatology, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiangdong Zhu
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Kai Zhang
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
| | - Rongrong Jin
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China.
| | - Chongxiang Huang
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China; School of Aeronautics and Astronautics, Sichuan University, Chengdu, 610065, China
| | - Yu Nie
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China.
| | - Xingdong Zhang
- National Engineering Research Centre for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, 610065, China
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Wang R, Wang M, Jin R, Wang Y, Yi M, Li Q, Li J, Zhang K, Sun C, Nie Y, Huang C, Mikos AG, Zhang X. High Strength Titanium with Fibrous Grain for Advanced Bone Regeneration. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207698. [PMID: 37029460 PMCID: PMC10238201 DOI: 10.1002/advs.202207698] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/21/2023] [Indexed: 06/04/2023]
Abstract
Pure titanium is widely used in clinical implants, but its bioinert properties (poor strength and mediocre effect on bone healing) limit its use under load-bearing conditions. Modeling on the structure of collagen fibrils and specific nanocrystal plane arrangement of hydroxyapatite in the natural bone, a new type of titanium (Ti) with a highly aligned fibrous-grained (FG) microstructure is constructed. The improved attributes of FG Ti include high strength (≈950 MPa), outstanding affinity to new bone growth, and tight bone-implant contact. The bone-mimicking fibrous grains induce an aligned surface topological structure conducive to forming close contact with osteoblasts and promotes the expression of osteogenic genes. Concurrently, the predominant Ti(0002) crystal plane of FG Ti induces the formation of hydrophilic anatase titanium oxide layers, which accelerate biomineralization. In conclusion, this bioinspired FG Ti not only proves to show mechanical and bone-regenerative improvements but it also provides a new strategy for the future design of metallic biomaterials.
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Affiliation(s)
- Ruohan Wang
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
| | - Mingsai Wang
- School of Aeronautics and AstronauticsSichuan UniversityChengdu610065China
| | - Rongrong Jin
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
| | - Yanfei Wang
- School of Aeronautics and AstronauticsSichuan UniversityChengdu610065China
| | - Min Yi
- Department of OrthopedicsOrthopedic Research InstituteWest China HospitalSichuan UniversityChengdu610041China
| | - Qinye Li
- Department of Chemistry and BiotechnologyCentre for Translational AtomaterialsSwinburne University of TechnologyHawthornVIC3122Australia
| | - Juan Li
- State Key Laboratory of Oral DiseasesWest China School of StomatologyWest China Hospital of StomatologySichuan UniversityChengdu610041China
| | - Kai Zhang
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
| | - Chenghua Sun
- Department of Chemistry and BiotechnologyCentre for Translational AtomaterialsSwinburne University of TechnologyHawthornVIC3122Australia
| | - Yu Nie
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
| | - Chongxiang Huang
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
- School of Aeronautics and AstronauticsSichuan UniversityChengdu610065China
| | - Antonios G. Mikos
- Departments of BioengineeringChemical and Biomolecular EngineeringRice UniversityHoustonTX77251USA
| | - Xingdong Zhang
- National Engineering Research Centre for Biomaterials/College of Biomedical EngineeringSichuan UniversityChengdu610065China
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3
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Soni R, Jhavar S, Tyeb S, Gupta SK, Suwas S, Chatterjee K. Wire Arc Additive Manufacturing of Zinc as a Degradable Metallic Biomaterial. J Funct Biomater 2022; 13:jfb13040212. [PMID: 36412853 PMCID: PMC9680225 DOI: 10.3390/jfb13040212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/23/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
Abstract
Wire arc additive manufacturing (WAAM) offers a high rate of material deposition among various additive manufacturing techniques with wire as feedstock material but has not been established for zinc alloys. Zn alloys can be used as degradable biomaterials, in contrast to conventional permanent metallic biomaterials. In this work, commercially pure Zn was processed by WAAM to obtain near-dense parts, and the properties obtained through WAAM-processed Zn were compared with wrought (WR) Zn samples. The microstructure and hardness values of the WAAM (41 ± 1 HV0.3) components were found to be similar to those of the WR (35 ± 2 HV0.3) components. Bulk X-ray diffraction texture measurements suggested that WAAM builds exhibit a heavily textured microstructure compared to the WR counterparts, with peak intensities around <3 3−6 2> or <0 0 0 2> in the directions parallel to the build direction (BD). The corrosion rates in simulated body fluid (SBF) were similar for WAAM (0.45 mmpy) and WR (0.3 mmpy) samples. The weight loss measurements in SBF were found to be marginally higher in the WAAM samples compared to the WR counterparts for a duration of up to 21 days. MC3T3-E1 preosteoblasts were found to be healthy and proliferating in the culture medium containing the degradation products from WAAM-Zn in a manner similar to WR-Zn. This work establishes the feasibility of processing Zn by WAAM for use in bioresorbable metallic implants.
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Affiliation(s)
- Rishabh Soni
- Department of Materials Engineering, Indian Institute of Science, Sir C. V. Raman Avenue, Bangalore 560012, India
| | - Suyog Jhavar
- School of Mechanical Engineering, VIT-AP University, Inavolu, Beside AP Secretariat Amaravati, Amaravati 522237, India
| | - Suhela Tyeb
- Department of Materials Engineering, Indian Institute of Science, Sir C. V. Raman Avenue, Bangalore 560012, India
| | - Saurabh Kumar Gupta
- Department of Materials Engineering, Indian Institute of Science, Sir C. V. Raman Avenue, Bangalore 560012, India
| | - Satyam Suwas
- Department of Materials Engineering, Indian Institute of Science, Sir C. V. Raman Avenue, Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Sir C. V. Raman Avenue, Bangalore 560012, India
- Correspondence: ; Tel.: +91-80-22933408
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4
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Wojtas D, Mzyk A, Kawałko J, Imbir G, Trembecka-Wójciga K, Marzec M, Jarzębska A, Maj Ł, Wierzbanowski K, Chulist R, Pachla W, Sztwiertnia K. Texture-Governed Cell Response to Severely Deformed Titanium. ACS Biomater Sci Eng 2021; 7:114-121. [PMID: 33347752 DOI: 10.1021/acsbiomaterials.0c01034] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The phenomenon of superior biological behavior observed in titanium processed by an unconventional severe plastic deformation method, that is, hydrostatic extrusion, has been described within the present study. In doing so, specimens varying significantly in the crystallographic orientation of grains, yet exhibiting comparable grain refinement, were meticulously investigated. The aim was to find the clear origin of enhanced biocompatibility of titanium-based materials, having microstructures scaled down to the submicron range. Texture, microstructure, and surface characteristics, that is, wettability, roughness, and chemical composition, were examined as well as protein adsorption tests and cell response studies were carried out. It has been concluded that, irrespective of surface properties and mean grain size, the (101̅0) crystallographic plane favors endothelial cell attachment on the surface of the severely deformed titanium. Interestingly, an enhanced albumin, fibronectin, and serum adsorption as well as clearly directional growth of the cells with preferentially oriented cell nuclei have been observed on the surfaces having (0001) planes exposed predominantly. Overall, the biological response of titanium fabricated by severe plastic deformation techniques is derived from the synergistic effect of surface irregularities, being the effect of refined microstructures, surface chemistry, and crystallographic orientation of grains rather than grain refinement itself.
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Affiliation(s)
- Daniel Wojtas
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Reymonta 19, Kraków 30-059, Poland.,Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Aldona Mzyk
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland.,Department of Biomedical Engineering, Groningen University, University Medical Center Groningen, Antonius Deusinglaan 1, Groningen 9700 RB, The Netherlands
| | - Jakub Kawałko
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, Kraków 30-059, Poland
| | - Gabriela Imbir
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Klaudia Trembecka-Wójciga
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Mateusz Marzec
- Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, Mickiewicza 30, Kraków 30-059, Poland
| | - Anna Jarzębska
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Łukasz Maj
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Krzysztof Wierzbanowski
- Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Reymonta 19, Kraków 30-059, Poland
| | - Robert Chulist
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
| | - Wacek Pachla
- Institute of High Pressure Physics (Unipress), Polish Academy of Sciences, Sokołowska 29/37, Warszawa 01-142, Poland
| | - Krzysztof Sztwiertnia
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków 30-059, Poland
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5
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Surface mechanical attrition treatment of low modulus Ti-Nb-Ta-O alloy for orthopedic applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110729. [PMID: 32204039 DOI: 10.1016/j.msec.2020.110729] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 12/19/2019] [Accepted: 02/03/2020] [Indexed: 12/13/2022]
Abstract
Surface mechanical attrition treatment (SMAT) is recognized as a surface severe plastic deformation (SPD) method that is effective in improving the surface-dependent mechanical and functional properties of conventional metallic biomaterials. In this study, we aimed to systemically investigate the effect of SMAT on the physical, electrochemical, tribological and biological performances of a newly developed low modulus β Ti-Nb-Ta-O alloy with two different microstructures, namely, single phase β-treated and dual phase β + α aged. The microhardness results showed considerable hardening for the β-treated condition due to formation of deformation substructures; that was associated with increased corrosion resistance resulting from a stronger and denser passive layer on the surface, as revealed by Tafel polarization, impedance studies and Mott-Scottky plots. The wear volume loss during fretting in serum solution was found to decrease by 46% while friction coefficient decreased only marginally, due to presence of a harder and more brittle surface. In the β + α condition of the alloy, minimal hardening was observed due to coarsening of the precipitates during SMAT. However, this also reduced the number of α-β interfaces, which in turn minimized the tendency for galvanic corrosion resulting in lower corrosion rate after SMAT. Wear resistance was enhanced after SMAT, with 32% decrease in wear volume loss and 21% decrease in friction coefficient resulted due to improved ductility on the surface. The attachment and growth of osteoblasts on the alloys in vitro were not affected by SMAT and was comparable to that on commercially pure Ti. Taken together, these results provide new insights into the effects of surface SPD of low modulus β- Ti alloys for orthopedic applications and underscore the importance of the initial microstructure in determining the performance of the alloy.
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6
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Guo L, Lu H, Li DY, Huang QX, Wang X, Szpunar JA. Crystallographic anisotropy in surface properties of brass and its dependence on the electron work function. J Appl Crystallogr 2018. [DOI: 10.1107/s160057671801573x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The crystallographic anisotropy of the electric current or conductance, adhesive force, elastic modulus, and deformation magnitude of alpha brass were investigated through property mapping using an atomic force microscope. Surface electron work functions of differently oriented grains in the brass were also analyzed using atomic force microscopy. The mapped surface properties are closely related to the electron work function; the work function reflects the surface activity, which is itself dependent on the surface energy. The anisotropy of the properties is closely correlated to the in situ measured surface electron work function. It is demonstrated that crystallographic planes with higher electron work functions exhibit lower current, smaller adhesive forces, larger elastic moduli and smaller deformation magnitudes. Efforts are made to understand the relationships by connecting the properties with surface energy and electron work function. The dependence of the properties on crystallographic orientation can be elucidated by considering the surface electron behavior using electron work function as a novel probing parameter.
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7
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The Influence of the Crystallographic Texture of Titanium on its Corrosion Resistance in Biological Media. ACTA ACUST UNITED AC 2018. [DOI: 10.4028/www.scientific.net/kem.769.42] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, relationship between corrosion resistance and crystallographic texture of α-titanium alloys has been investigated. Samples of α-titanium with different crystallographic texture were obtained by using non-vacuum electron beam cladding as well as cold rolling with a deformation ratios ε ~ 30% and ε ~ 60%. Obtained results show that the crystallographic texture of the surface of titanium influences the corrosion properties and biological compatibility the highest of corrosion resistance corresponds to alloys with a basal surface texture ((0001), (0002)).
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8
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Bahl S, Das S, Suwas S, Chatterjee K. Engineering the next-generation tin containing β titanium alloys with high strength and low modulus for orthopedic applications. J Mech Behav Biomed Mater 2017; 78:124-133. [PMID: 29156291 DOI: 10.1016/j.jmbbm.2017.11.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/18/2017] [Accepted: 11/08/2017] [Indexed: 12/01/2022]
Abstract
Metastable β Ti alloys are the new emerging class of biomaterial for load bearing orthopedic applications. However, these alloys in the single β phase microstructure have insufficient strength for use in load bearing applications. It is imperative to strengthen these alloys by carefully designed thermo-mechanical processing routes that typically involve aging treatment. In this investigation two newly designed Sn based β Ti alloys of composition Ti-32Nb-(2, 4) Sn are evaluated. The effects of Sn content on the mechanical properties and biological performance of these alloys processed through designed thermo-mechanical processing route are investigated. The increase in the Sn content led to a reduction in the elastic modulus of the alloy. An increase in the Sn content increased the aspect ratio of the α precipitates, which led to a significant strengthening in the alloy while keeping the elastic modulus low. In addition, the corrosion behavior of the alloy was evaluated in simulated body fluid. The Sn containing β alloys have an excellent corrosion resistance as desired for an implant material. The corrosion resistance improved with an increase in Sn content. These alloys were also observed to have excellent cytocompatibility as they not only supported the attachment and proliferation of human mesenchymal stem cells but also their osteogenic differentiation in vitro. The combination of high strength, low elastic modulus, superior corrosion resistance and biocompatibility underscores the promise of Sn containing β Ti alloys for use in orthopedic applications.
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Affiliation(s)
- Sumit Bahl
- Department of Materials Engineering Indian Institute of Science, Bangalore 560012, India
| | - Suvam Das
- Department of Materials Engineering Indian Institute of Science, Bangalore 560012, India
| | - Satyam Suwas
- Department of Materials Engineering Indian Institute of Science, Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering Indian Institute of Science, Bangalore 560012, India.
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9
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Baek SM, Shin MH, Moon J, Jung HS, Lee SA, Hwang W, Yeom JT, Hahn SK, Kim HS. Superior Pre-Osteoblast Cell Response of Etched Ultrafine-Grained Titanium with a Controlled Crystallographic Orientation. Sci Rep 2017; 7:44213. [PMID: 28266643 PMCID: PMC5339782 DOI: 10.1038/srep44213] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 02/03/2017] [Indexed: 11/24/2022] Open
Abstract
Ultrafine-grained (UFG) Ti for improved mechanical performance as well as its surface modification enhancing biofunctions has attracted much attention in medical industries. Most of the studies on the surface etching of metallic biomaterials have focused on surface topography and wettability but not crystallographic orientation, i.e., texture, which influences the chemical as well as the physical properties. In this paper, the influences of texture and grain size on roughness, wettability, and pre-osteoblast cell response were investigated in vitro after HF etching treatment. The surface characteristics and cell behaviors of ultrafine, fine, and coarse-grained Ti were examined after the HF etching. The surface roughness during the etching treatment was significantly increased as the orientation angle from the basal pole was increased. The cell adhesion tendency of the rough surface was promoted. The UFG Ti substrate exhibited a higher texture energy state, rougher surface, enhanced hydrophilic wettability, and better cell adhesion and proliferation behaviors after etching than those of the coarse- and fine-grained Ti substrates. These results provide a new route for enhancing both mechanical and biological performances using etching after grain refinement of Ti.
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Affiliation(s)
- Seung Mi Baek
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Myeong Hwan Shin
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Jongun Moon
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Ho Sang Jung
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.,Korea Institute of Materials Science, Changwon, 51508, Republic of Korea
| | - See Am Lee
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - WoonBong Hwang
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Jong Taek Yeom
- Korea Institute of Materials Science, Changwon, 51508, Republic of Korea
| | - Sei Kwang Hahn
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Hyoung Seop Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.,Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
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10
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Hasan J, Jain S, Chatterjee K. Nanoscale Topography on Black Titanium Imparts Multi-biofunctional Properties for Orthopedic Applications. Sci Rep 2017; 7:41118. [PMID: 28112235 PMCID: PMC5253769 DOI: 10.1038/srep41118] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023] Open
Abstract
We have developed a chlorine based reactive ion etching process to yield randomly oriented anisotropic nanostructures that render the titanium metal surface 'black' similar to that of black silicon. The surface appears black due to the nanostructures in contrast to the conventional shiny surface of titanium. The nanostructures were found to kill bacteria on contact by mechanically rupturing the cells as has been observed previously on wings of certain insects. The etching was optimized to yield nanostructures of ≈1 μm height for maximal bactericidal efficiency without compromising cytocompatibility. Within 4 hours of contact with the black titanium surface, 95% ± 5% of E. coli, 98% ± 2% of P. aeruginosa, 92% ± 5% of M. smegmatis and 22% ± 8% of S. aureus cells that had attached were killed. The killing efficiency for the S. aureus increased to 76% ± 4% when the cells were allowed to adhere up to 24 hours. The black titanium supported the attachment and proliferation of human mesenchymal stem cells and augmented osteogenic lineage commitment in vitro. Thus, the bioinspired nanostructures on black titanium impart multi-biofunctional properties toward engineering the next-generation biomaterials for orthopedic implants.
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Affiliation(s)
- Jafar Hasan
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Shubham Jain
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
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11
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Effect of current density during electrodeposition on microstructure and hardness of textured Cu coating in the application of antimicrobial Al touch surface. J Mech Behav Biomed Mater 2016; 63:352-360. [DOI: 10.1016/j.jmbbm.2016.07.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 06/23/2016] [Accepted: 07/10/2016] [Indexed: 11/16/2022]
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12
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Natarajan J, Madras G, Chatterjee K. Maltitol-based biodegradable polyesters with tailored degradation and controlled release for bone regeneration. RSC Adv 2016. [DOI: 10.1039/c6ra02058e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polyesters based on maltitol and different dicarboxylic acids promoted mineral deposition and directed cells towards osteogenic lineage.
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Affiliation(s)
- Janeni Natarajan
- Centre for Nano Science and Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Giridhar Madras
- Department of Chemical Engineering
- Indian Institute of Science
- Bangalore-560012
- India
| | - Kaushik Chatterjee
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore-560012
- India
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13
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Hasan J, Raj S, Yadav L, Chatterjee K. Engineering a nanostructured "super surface" with superhydrophobic and superkilling properties. RSC Adv 2015; 5:44953-44959. [PMID: 29075481 PMCID: PMC5654505 DOI: 10.1039/c5ra05206h] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
We present a nanostructured "super surface" fabricated using a simple recipe based on deep reactive ion etching of a silicon wafer. The topography of the surface is inspired by the surface topographical features of dragonfly wings. The super surface is comprised of nanopillars 4 μm in height and 220 nm in diameter with random inter-pillar spacing. The surface exhibited superhydrophobicity with a static water contact angle of 154.0° and contact angle hysteresis of 8.3°. Bacterial studies revealed the bactericidal property of the surface against both gram negative (Escherichia coli) and gram positive (Staphylococcus aureus) strains through mechanical rupture of the cells by the sharp nanopillars. The cell viability on these nanostructured surfaces was nearly six-fold lower than on the unmodified silicon wafer. The nanostructured surface also killed mammalian cells (mouse osteoblasts) through mechanical rupture of the cell membrane. Thus, such nanostructured super surfaces could find applications for designing self-cleaning and anti-bacterial surfaces in diverse applications such as microfluidics, surgical instruments, pipelines and food packaging.
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Affiliation(s)
- Jafar Hasan
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India 560012
| | - Shammy Raj
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India 560012
| | - Lavendra Yadav
- Centre for Nanoscience and Engineering, Indian Institute of Science, Bangalore, Karnataka, India 560012
| | - Kaushik Chatterjee
- Department of Materials Engineering, Indian Institute of Science, Bangalore, Karnataka, India 560012
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14
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Bahl S, Shreyas P, Trishul MA, Suwas S, Chatterjee K. Enhancing the mechanical and biological performance of a metallic biomaterial for orthopedic applications through changes in the surface oxide layer by nanocrystalline surface modification. NANOSCALE 2015; 7:7704-7716. [PMID: 25833718 DOI: 10.1039/c5nr00574d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanostructured metals are a promising class of biomaterials for application in orthopedics to improve the mechanical performance and biological response for increasing the life of biomedical implants. Surface mechanical attrition treatment (SMAT) is an efficient way of engineering nanocrystalline surfaces on metal substrates. In this work, 316L stainless steel (SS), a widely used orthopedic biomaterial, was subjected to SMAT to generate a nanocrystalline surface. Surface nanocrystallization modified the nature of the oxide layer present on the surface. It increased the corrosion-fatigue strength in saline by 50%. This increase in strength is attributed to a thicker oxide layer, residual compressive stresses, high strength of the surface layer, and lower propensity for intergranular corrosion in the nanocrystalline layer. Nanocrystallization also enhanced osteoblast attachment and proliferation. Intriguingly, wettability and surface roughness, the key parameters widely acknowledged for controlling the cellular response remained unchanged after nanocrystallization. The observed cellular behavior is explained in terms of the changes in electronic properties of the semiconducting passive oxide film present on the surface of 316L SS. Nanocrystallization increased the charge carrier density of the n-type oxide film likely preventing denaturation of the adsorbed cell-adhesive proteins such as fibronectin. In addition, a net positive charge developed on the otherwise neutral oxide layer, which is known to facilitate cellular adhesion. The role of changes in the electronic properties of the oxide films on metal substrates is thus highlighted in this work. This study demonstrates the advantages of nanocrystalline surface modification by SMAT for processing metallic biomaterials used in orthopedic implants.
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Affiliation(s)
- Sumit Bahl
- Department of Materials Engineering, Indian Institute of Science, Bangalore, India 560012.
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Bahl S, Suwas S, Chatterjee K. The control of crystallographic texture in the use of magnesium as a resorbable biomaterial. RSC Adv 2014. [DOI: 10.1039/c4ra08484e] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Texture can be used as a tool to tailor material properties in use of magnesium as resorbable biomaterial for orthopedic and cardiovascular applications.
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Affiliation(s)
- Sumit Bahl
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore 560012, India
| | - Satyam Suwas
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore 560012, India
| | - Kaushik Chatterjee
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore 560012, India
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