1
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Michalska J, Sowa M, Stolarczyk A, Warchoł F, Nikiforow K, Pisarek M, Dercz G, Pogorielov M, Mishchenko O, Simka W. Plasma electrolytic oxidation of Zr-Ti-Nb alloy in phosphate-formate-EDTA electrolyte. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Aubakirova V, Farrakhov R, Astanin V, Sharipov A, Gorbatkov M, Parfenov E. Plasma Electrolytic Oxidation of Zr-1%Nb Alloy: Effect of Sodium Silicate and Boric Acid Addition to Calcium Acetate-Based Electrolyte. MATERIALS 2022; 15:ma15062003. [PMID: 35329459 PMCID: PMC8949335 DOI: 10.3390/ma15062003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 01/18/2023]
Abstract
This work aimed at the development of wear and corrosion resistant oxide coatings for medical implants made of zirconium alloy, by plasma electrolytic oxidation (PEO). The effect of sodium silicate and boric acid addition to calcium acetate electrolyte on the coating properties was studied. Different aspects of the PEO coating were investigated: microstructure, electrochemical and wear behavior, wettability and apatite-forming ability. The resultant coatings consist of a dense inner layer 1.4–2.2 µm thick and a porous outer layer. The total thickness of the coating is 12–20 µm. It was found that the coating contains the tetragonal zirconia (70–95%). The obtained coatings show high corrosion resistance and reduce the surface corrosion current by 1–3 orders of magnitude, depending on the electrolyte additive, compared to the uncoated surface. The addition of boric acid to the electrolyte significantly increases the wear resistance of the coating and reduces the coefficient of friction. In terms of the combination of the coating characteristics, the electrolyte with the addition of the alkali and boric acid is recommended as the most effective.
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3
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Matuła I, Dercz G, Sowa M, Barylski A, Duda P. Fabrication and Characterization of New Functional Graded Material Based on Ti, Ta, and Zr by Powder Metallurgy Method. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6609. [PMID: 34772133 PMCID: PMC8585251 DOI: 10.3390/ma14216609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022]
Abstract
In view of the aging population and various diseases worldwide, the demand for implants has been rapidly increasing. Despite the efforts of doctors, engineers, and medical companies, the fabrication of and procedures associated with implants have not yet been perfected. Therefore, a high percentage of premature implantations has been observed. The main problem with metal implants is the mechanical mismatch between human bone and the implant material. Zirconium/titanium-based materials with graded porosity and composition were prepared by powder metallurgy. The whole samples are comprised of three zones, with a radial gradient in the phase composition, microstructure, and pore structure. The samples were prepared by a three-step powder metallurgy method. The microstructure and properties were observed to change gradually with the distance from the center of the sample. The x-ray diffraction analysis and microstructure observation confirmed the formation of diffusive connections between the particular areas. Additionally, the mechanical properties of the obtained materials were checked, with respect to the distance from the center of the sample. An analysis of the corrosion properties of the obtained materials was also carried out.
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Affiliation(s)
- Izabela Matuła
- Institute of Materials Engineering, University of Silesia in Katowice, 41-500 Chorzów, Poland;
| | - Grzegorz Dercz
- Institute of Materials Engineering, University of Silesia in Katowice, 41-500 Chorzów, Poland;
| | - Maciej Sowa
- Faculty of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Adrian Barylski
- Institute of Materials Engineering, University of Silesia in Katowice, 41-500 Chorzów, Poland;
| | - Piotr Duda
- Faculty of Science and Technology, Institute of Biomedical Engineering, University of Silesia in Katowice, 41-200 Sosnowiec, Poland;
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4
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Ou P, Hao C, Liu J, He R, Wang B, Ruan J. Cytocompatibility of Ti-xZr alloys as dental implant materials. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:50. [PMID: 33891193 PMCID: PMC8064977 DOI: 10.1007/s10856-021-06522-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 04/01/2021] [Indexed: 05/03/2023]
Abstract
Ti-xZr (x = 5, 15, 25, 35, 45% wt%) alloys with low elastic modulus and high mechanical strength were fabricated as a novel implant material. The biocompatibility of the Ti-xZr alloys was evaluated by osteoblast-like cell line (MG63) in terms of cytotoxicity, proliferation, adhesion, and osteogenic induction using CCK-8 and live/dead cell assays, electron microscopy, and real-time PCR. The Ti-xZr alloys were non-toxic and showed superior biomechanics compared to commercially pure titanium (cpTi). Ti-45Zr had the optimum strength/elastic modulus ratio and osteogenic activity, thus is a promising to used as dental implants.
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Affiliation(s)
- Pinghua Ou
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, PR China
- Department of Stomatology, Third Xiangya Hospital, Central South University, Changsha, 410013, PR China
| | - Cong Hao
- Department of Orthopedics, Xiangya Hospital Central South University, Changsha, 410008, Hunan, PR China
| | - Jue Liu
- Hunan Province Key Laboratory of Engineering Rheology, Central South University of Forestry and Technology, Changsha, 410004, PR China
| | - Rengui He
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, PR China
| | - Baoqi Wang
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, PR China
| | - Jianming Ruan
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, PR China.
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Matuła I, Dercz G, Zubko M, Maszybrocka J, Jurek-Suliga J, Golba S, Jendrzejewska I. Microstructure and Porosity Evolution of the Ti-35Zr Biomedical Alloy Produced by Elemental Powder Metallurgy. MATERIALS (BASEL, SWITZERLAND) 2020; 13:ma13204539. [PMID: 33066125 PMCID: PMC7601945 DOI: 10.3390/ma13204539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 06/11/2023]
Abstract
In the present study, the structure and porosity of binary Ti-35Zr (wt.%) alloy were investigated, allowing to consider powder metallurgy as a production method for new metallic materials for potential medical applications. The porous Ti-Zr alloys were obtained by milling, cold isostatic pressing and sintering. The pressure during cold isostatic pressing was a changing parameter and was respectively 250, 500, 750 and 1000 MPa. The X-ray diffraction study revealed only the α phase, which corresponds to the Ti-Zr phase diagram. The microstructure of the Ti-35Zr was observed by optical microscopy and scanning electron microscopy. These observations revealed that the volume fraction of the pores decreased from over 20% to about 7% with increasing pressure during the cold isostatic pressing. The microhardness measurements showed changes from 137 HV0.5 to 225 HV0.5.
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Affiliation(s)
- Izabela Matuła
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
| | - Grzegorz Dercz
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
| | - Maciej Zubko
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
- Department of Physics, University of Hradec Kralove, Rokitanskeho 62, 500-03 Hradec Kralove, Czech Republic
| | - Joanna Maszybrocka
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
| | - Justyna Jurek-Suliga
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
| | - Sylwia Golba
- Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty Street 1 A, 41-500 Chorzów, Poland; (M.Z.); (J.M.); (J.J.-S.); (S.G.)
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6
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Improvement of the Corrosion Resistance of Biomedical Zr-Ti Alloys Using a Thermal Oxidation Treatment. METALS 2020. [DOI: 10.3390/met10020166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Binary Zr-Ti alloys spontaneously develop a tenacious and compact oxide layer when their fresh surface is exposed either to air or to aqueous environments. Electrochemical impedance spectroscopy (EIS) analysis of Zr-45Ti, Zr-25Ti, and Zr-5Ti exposed to simulated physiological solutions at 37 °C evidences the formation of a non-sealing bilayer oxide film that accounts for the corrosion resistance of the materials. Unfortunately, these oxide layers may undergo breakdown and stable pitting corrosion regimes at anodic potentials within the range of those experienced in the human body under stress and surgical conditions. Improved corrosion resistance has been achieved by prior treatment of these alloys using thermal oxidation in air. EIS was employed to measure the corrosion resistance of the Zr-Ti alloys in simulated physiological solutions of a wide pH range (namely 3 ≤ pH ≤ 8) at 37 °C, and the best results were obtained for the alloys pre-treated at 500 °C. The formation of the passivating oxide layers in simulated physiological solution was monitored in situ using scanning electrochemical microscopy (SECM), finding a transition from an electrochemically active surface, characteristic of the bare metal, to the heterogeneous formation of oxide layers behaving as insulating surfaces towards electron transfer reactions.
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7
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Feng Z, Dong H, Kang J, Li J, Zhang X, Ma M, Liu R. Study on the correlation between microstructures and corrosion properties of novel ZrTiAlV alloys. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 101:92-102. [PMID: 31029368 DOI: 10.1016/j.msec.2019.03.076] [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: 11/16/2018] [Revised: 03/07/2019] [Accepted: 03/22/2019] [Indexed: 11/17/2022]
Abstract
In this work, microstructures and corrosion behaviors of novel ZrTiAl-χV (χ = 0, 1, 3, 5, 7 wt%) alloys have been investigated. Phase composition and microstructures of the specimens are characterized using X-ray diffraction, optical microscopy, scanning electron microscopy, and transmission electron microscopy. The results show that phase composition of the alloys change by α' → α″ → α″ + β → β as V is added gradually. Meanwhile, the mean size of the α' phase, α″ martensite and β phase decreases as V content increases. In order to test the corrosion performance of the specimens, potentiodynamic polarization tests in NaCl and HCl solutions and immersion tests in HCl solution are performed. Analysis of potentiodynamic potential curves indicates that corrosion potential increases and corrosion current density decreases with adding V content in the examined alloys. From the results of weight loss tests, it can be observed that the weight loss of the examined alloys decreases along with the increase of V content. In addition, when the content of V is added from 3 to 7 wt%, the metastable corrosion pits are replaced with the stable corrosion pits. The phase composition as well as the grain size can be identified as the main factor affecting the corrosion performance of the alloys.
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Affiliation(s)
- Zhihao Feng
- School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Huicong Dong
- School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
| | - Jie Kang
- School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Jianhui Li
- School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xinyu Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
| | - Mingzhen Ma
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Riping Liu
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
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8
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Chelariu R, Trinca L, Munteanu C, Bolat G, Sutiman D, Mareci D, Souto R. Corrosion behavior of new quaternary ZrNbTiAl alloys in simulated physiological solution using electrochemical techniques and surface analysis methods. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.157] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Martinof AM, Ionita D, Demetrescu I. Influence of Various Albumin Concentrations on the Corrosion Resistance of Zr-2.5%Nb Alloy. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2016.1225197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Anca Maria Martinof
- Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, Bucharest, Romania
| | - Daniela Ionita
- Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, Bucharest, Romania
| | - Ioana Demetrescu
- Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, Bucharest, Romania
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10
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Yeo GC, Santos M, Kondyurin A, Liskova J, Weiss AS, Bilek MMM. Plasma-Activated Tropoelastin Functionalization of Zirconium for Improved Bone Cell Response. ACS Biomater Sci Eng 2016; 2:662-676. [PMID: 33465866 DOI: 10.1021/acsbiomaterials.6b00049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The mechanical strength, durability, corrosion resistance, and biocompatibility of metal alloys based on zirconium (Zr) and titanium (Ti) make them desirable materials for orthopedic implants. However, as bioinert metals, they do not actively promote bone formation and integration. Here we report a plasma coating process for improving integration of such metal implants with local bone tissue. The coating is a stable carbon-based plasma polymer layer that increased surface wettability by 28%, improved surface elasticity to the range exhibited by natural bone, and additionally covalently bound the extracellular matrix protein, tropoelastin, in an active conformation. The thus biofunctionalized material was significantly more resistant to medical-grade sterilization by steam, autoclaving or gamma-ray irradiation, retaining >60% of the adhered tropoelastin molecules and preserving full bioactivity. The interface of the coating and metal was robust so as to resist delamination during surgical insertion and in vivo deployment, and the plasma process employed was utilized to also coat the complex 3D geometries typical of orthopedic implants. Osteoblast-like osteosarcoma cells cultured on the biofunctionalized Zr surface exhibited a significant 30% increase in adhesion and up to 70% improvement in proliferation. Cells on these materials also showed significant early stage up-regulation of bone marker expression (alkaline phosphatase, 1.8 fold; osteocalcin, 1.4 fold), and sustained up-regulation of these genes (alkaline phosphatase, 1.3 fold; osteocalcin, 1.2 fold) in osteogenic conditions. In addition, alkaline phosphatase production significantly increased (2-fold) on the functionalized surfaces, whereas bone mineral deposition increased by 30% above background levels compared to bare Zr. These findings have the potential to be readily translated to the development of improved Zr and Ti-based implants for accelerated bone repair.
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Affiliation(s)
| | - Miguel Santos
- The Heart Research Institute, 7 Eliza Street, Newtown, New South Wales 2050, Australia
| | | | - Jana Liskova
- Institute of Physiology, Academy of Sciences of the Czech Republic, Národní 1009/3, Prague 14220, Czech Republic
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11
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Wen B, Chen J, Dard M, Cai Z. The Performance of Titanium-Zirconium Implants in the Elderly: A Biomechanical Comparative Study in the Minipig. Clin Implant Dent Relat Res 2016; 18:1200-1209. [PMID: 26834004 DOI: 10.1111/cid.12389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 12/03/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Bo Wen
- Professor, Division of Implant Dentistry, Department of Oral & Maxillofacial Surgery, Nanjing Stomatology Hospital; Medical School of Nanjing University; Nanjing China
| | - Jiang Chen
- professor, Department of Implant Dentistry, School and Hospital of Stomatology; Fujian Medical University; Fuzhou China
| | - Michel Dard
- head and director, Preclinical Research; Institut Straumann AG; Basel Switzerland
- professor, Department of Periodontology and Implant Dentistry; College of Dentistry, New York University; New York NY USA
| | - Zhiyu Cai
- professor, Department of Implant Dentistry, School and Hospital of Stomatology; Fujian Medical University; Fuzhou China
- associate professor, Department of Stomatology; Fujian Medical University Union Hospital; Fuzhou China
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12
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Mohammed MT, Khan ZA, Manivasagam G, Siddiquee AN. Influence of thermomechanical processing on biomechanical compatibility and electrochemical behavior of new near beta alloy, Ti-20.6Nb-13.6Zr-0.5V. Int J Nanomedicine 2015; 10 Suppl 1:223-35. [PMID: 26491324 PMCID: PMC4599622 DOI: 10.2147/ijn.s80000] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This paper presents the results for the effect of different methods of thermomechanical processing on the mechanical properties and electrochemical behavior of metastable β alloy Ti-20.6Nb-13.6Zr-0.5V (TNZV). The thermomechanical processing included hot working, solution heat treatments at different temperatures, and cooling rates in addition to aging. The thermomechanical processing conditions used in the study resulted in attainment of a wide range of microstructures with varying spatial distributions and morphologies of elongated/equiaxed α, β phases, or martensite, as a result of which several tensile properties were achieved. Aging treatment led to an increase in hardness, elastic modulus, and tensile strength and a decrease in ductility (elongation). Electrochemical tests indicated that the TNZV alloy undergoes spontaneous passivation due to spontaneous formation of an oxide film in the environment of the human body. Because the air-cooled samples possessed high hardness and also a fine grain size, they showed a lower corrosion rate than the samples treated under other conditions.
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Affiliation(s)
- Mohsin Talib Mohammed
- Mechanical Engineering Department, Faculty of Engineering, Jamia Millia Islamia, New Delhi, India
| | - Zahid A Khan
- Mechanical Engineering Department, Faculty of Engineering, Jamia Millia Islamia, New Delhi, India
| | - Geetha Manivasagam
- Centre for Biomaterials Science and Technology, VIT University, Vellore, India
| | - Arshad N Siddiquee
- Mechanical Engineering Department, Faculty of Engineering, Jamia Millia Islamia, New Delhi, India
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13
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Kajima Y, Takaichi A, Yasue T, Doi H, Takahashi H, Hanawa T, Wakabayashi N. Evaluation of the shear bond strength of dental porcelain and the low magnetic susceptibility Zr-14Nb alloy. J Mech Behav Biomed Mater 2015; 53:131-141. [PMID: 26318573 DOI: 10.1016/j.jmbbm.2015.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 11/16/2022]
Abstract
The aim of this study was to investigate the bond strength of dental porcelain and the preheated Zr-14Nb alloy, and compare this strength with that of titanium. White oxide layers, which were predominantly composed of monoclinic zirconia, were formed on the preheated sample groups, and exhibited a greater roughness than the control samples. At the metal-ceramic interface, a greater Nb diffusion range was observed than in the control samples. The bond strengths of the samples subjected to 20min preheating treatment were the lowest (33.6 ± 3.2 MPa), which may be ascribed to the formation of a brittle thick oxide layer under excessive heat treatment. The samples subjected to this heat treatment for 5 min exhibited the highest mean bond strength (43.7 ± 5.9 MPa), which was significantly higher than that of titanium (35.3 ± 3.5 MPa). Thus, the Zr-14Nb alloy is a promising candidate for fixed dental prosthesis, as long as the appropriate treatment conditions are adopted.
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Affiliation(s)
- Yuka Kajima
- Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Atsushi Takaichi
- Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
| | - Tohru Yasue
- Fixed Prosthetic Engineering, School of Oral Health Care Sciences, Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Hisashi Doi
- Metallic Biomaterials, Biomedical Materials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Hidekazu Takahashi
- Oral Biomaterials Engineering, Course of Oral Health Engineering, School of Oral Health Care Sciences, Faculty of Dentistry, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Takao Hanawa
- Metallic Biomaterials, Biomedical Materials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
| | - Noriyuki Wakabayashi
- Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
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14
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Rodríguez-Hernández MG, Jiménez O, Alvarado-Hernández F, Flores M, Andrade E, Canto CE, Ávila C, Espinoza-Beltrán F. The effect of C content on the mechanical properties of Ti-Zr coatings. J Mech Behav Biomed Mater 2015; 49:269-76. [PMID: 26056996 DOI: 10.1016/j.jmbbm.2015.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 04/27/2015] [Accepted: 05/07/2015] [Indexed: 11/19/2022]
Abstract
In this study, Ti-Zr and Ti-Zr-C coatings were deposited at room temperature via pulsed-DC magnetron sputtering. A 70Ti-30Zr at% target and a 99.99% graphite plate were used to deposit samples. In order to modify C content, coatings were deposited at different target powers such as 50, 75 and 100 W. Changes on the structure, microstructure and mechanical properties due to C addition were studied. Results indicate that the as-deposited coatings were partly crystalline and that an increment on C content stabilized α' phase and inhibited the appearance of ω precipitates. Therefore, Ti-Zr-C alloys with C>1.9 at% showed only α' phase whereas the others alloys exhibited α'+ω structures. Hardness values from 12.94 to 34.31 GPa were obtained, whereas the elastic modulus was found between 181.84 and 298 GPa. Finally, a high elastic recovery ratio (0.69-0.87) was observed as a function of composition. The overall properties of these coatings were improved due to C content increment, martensitic α' phase and nanocrystalline grain size (10-16 nm).
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Affiliation(s)
- M G Rodríguez-Hernández
- Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico.
| | - O Jiménez
- Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico
| | - F Alvarado-Hernández
- Unidad Académica de Ingeniería I, Universidad Autónoma de Zacatecas, Av. López Velarde 801, Zacatecas, Zacatecas 98060, Mexico
| | - M Flores
- Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno 48, Zapopan, Jalisco 45100, Mexico
| | - E Andrade
- Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad Universitaria S/N, D.F. 04510, Mexico
| | - C E Canto
- Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica Ciudad Universitaria S/N, D.F. 04510, Mexico
| | - C Ávila
- Centro de Investigación y Estudios Avanzados del I.P.N., Libramiento Norponiente 2000, Querétaro, Querétaro 76230, Mexico
| | - F Espinoza-Beltrán
- Centro de Investigación y Estudios Avanzados del I.P.N., Libramiento Norponiente 2000, Querétaro, Querétaro 76230, Mexico
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15
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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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16
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Faria AC, Rodrigues RC, Rosa AL, Ribeiro RF. Experimental titanium alloys for dental applications. J Prosthet Dent 2014; 112:1448-60. [DOI: 10.1016/j.prosdent.2013.12.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 12/19/2013] [Accepted: 12/31/2013] [Indexed: 11/15/2022]
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17
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Simka W, Krząkała A, Korotin DM, Zhidkov IS, Kurmaev EZ, Cholakh SO, Kuna K, Dercz G, Michalska J, Suchanek K, Gorewoda T. Modification of a Ti–Mo alloy surface via plasma electrolytic oxidation in a solution containing calcium and phosphorus. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.02.102] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Wen B, Zhu F, Li Z, Zhang P, Lin X, Dard M. The osseointegration behavior of titanium-zirconium implants in ovariectomized rabbits. Clin Oral Implants Res 2013; 25:819-25. [PMID: 23432001 DOI: 10.1111/clr.12141] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2013] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The aim of this study is to compare the osseointegration behavior of titanium (Ti) and titanium-zirconium (TiZr) implants in ovariectomized (OVX) rabbits. MATERIALS AND METHODS Twelve ovariectomized New Zealand rabbits submitted to a hypocalcic diet and 12 sham-aged rabbits were used. After the bone mass loss induction period, TiZr or Ti implants both benefiting from a SLActive surface treatment were randomly inserted in the tibia and femur of each animal. The total of 24 rabbits were divided in four groups (n = 6): SHAM + Ti, OVX + Ti, SHAM + TiZr,OVX + TiZr. The animals were respectively sacrificed 3 and 6 weeks after dental implant placement. Six implants in each group at each time point were subjected to removal torque testing, and the remaining implants were prepared for histomorphometric analysis. RESULTS At the end of the healing period, all implants were osseointegrated. The removal torque value of the SHAM-TiZr group was significantly higher than those of the SHAM-Ti group (P < 0.001). The removal torque of the OVX-Ti group was significantly lower than those of the OVX-TiZr group. All groups demonstrated an increase in the peak torque value after 6 weeks: 46.0 and 50.8 Ncm for the OVX and the SHAM animals, respectively, in the case where Ti implants were used. When TiZr implants were inserted, the values reached 60.7 and 76.2 Ncm with a similar group configuration. The BIC and the BA/TA analysis showed an increase between week 3 and 6 in the case of nonovariectomized animals. From week 3 to 6, the BIC went from 37.1 ± 14.3 to 47.7 ± 8.7 for the SHAM + Ti group and from 37.6 ± 10.9 to 50.4 ± 11 for the SHAM + TiZr group. The BIC values were not significantly different between groups. CONCLUSION The parameters intended to be representative of the bone morphology (BIC & BATA) did not help to discriminate between Ti and TiZr which appeared to behave similarly in this experimental model. However, the removal torque values for the TiZr group were statistically higher than those of the Ti group in both the SHAM and the ovariectomized animals. That likely reflected an increased quality of bone around the TiZr implants.
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Affiliation(s)
- Bo Wen
- Division of Implant Dentistry, Department of Oral & Maxillofacial Surgery, Affiliated Stomatological Hospital of Medical School, Nanjing University, Nanjing, China
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19
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Gomez Sanchez A, Ballarre J, Orellano JC, Duffó G, Ceré S. Surface modification of zirconium by anodisation as material for permanent implants: in vitro and in vivo study. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:161-169. [PMID: 23053800 DOI: 10.1007/s10856-012-4770-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 09/17/2012] [Indexed: 06/01/2023]
Abstract
The potential use of anodised zirconium as permanent implant has been investigated. Zirconium was anodised at constant potential between 3 and 30 V in H(3)PO(4). Electrochemical assays were conducted in simulated body fluid solution (SBF) in order to evaluate the effect of the surface oxide on the corrosion resistance in vitro after 30 days of immersion. The rupture potential increases when increasing thickness of the anodic surface film. The increase in the barrier effect when increasing anodising potential is also verified by EIS. Anodisation in H(3)PO(4) proved to increase the apatite formation capability of zirconium in a single step. In vivo bone formation was also analysed by implanting the modified materials in Wistar rats. Anodised Zr presents higher corrosion resistance in SBF in all the studied immersion times when compared with non anodised Zr. Additionally, in vivo experiments evidence bone generation and growth in contact with zirconium implants both in the as-received and anodised condition.
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Affiliation(s)
- A Gomez Sanchez
- División Corrosión-INTEMA, Universidad Nacional del Mar del Plata-CONICET, Mar del Plata, Argentina
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20
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Bolat G, Izquierdo J, Santana JJ, Mareci D, Souto RM. Electrochemical characterization of ZrTi alloys for biomedical applications. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.10.026] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Zhou FY, Wang BL, Qiu KJ, Li L, Lin JP, Li HF, Zheng YF. Microstructure, mechanical property, corrosion behavior, and in vitro biocompatibility of Zr-Mo alloys. J Biomed Mater Res B Appl Biomater 2012; 101:237-46. [PMID: 23143798 DOI: 10.1002/jbm.b.32833] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Revised: 08/13/2012] [Accepted: 08/20/2012] [Indexed: 11/12/2022]
Abstract
In this study, the microstructure, mechanical properties, corrosion behaviors, and in vitro biocompatibility of Zr-Mo alloys as a function of Mo content after solution treatment were systemically investigated to assess their potential use in biomedical application. The experimental results indicated that Zr-1Mo alloy mainly consisted of an acicular structure of α' phase, while ω phase formed in Zr-3Mo alloy. In Zr-5Mo alloy, retained β phase and a small amount of precipitated α phase were observed. Only the retained β phase was obtained in Zr-10Mo alloy. Zr-1Mo alloy exhibited the greatest hardness, bending strength, and modulus among all experimental Zr-Mo alloys, while β phase Zr-10Mo alloy had a low modulus. The results of electrochemical corrosion indicated that adding Mo into Zr improved its corrosion resistance which resulted in increasing the thermodynamic stability and passivity of zirconium. The cytotoxicity test suggested that the extracts of the studied Zr-Mo alloys produced no significant deleterious effect to fibroblast cells (L-929) and osteoblast cells (MG 63), indicating an excellent in vitro biocompatibility. Based on these facts, certain Zr-Mo alloys potentially suitable for different biomedical applications were proposed.
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Affiliation(s)
- F Y Zhou
- Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China
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22
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Microstructure, corrosion behavior and cytotoxicity of Zr–Nb alloys for biomedical application. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.02.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Rosalbino F, Macciò D, Scavino G, Saccone A. In vitro corrosion behaviour of Ti-Nb-Sn shape memory alloys in Ringer's physiological solution. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:865-871. [PMID: 22311078 DOI: 10.1007/s10856-012-4560-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
The nearly equiatomic Ni-Ti alloy (Nitinol) has been widely employed in the medical and dental fields owing to its shape memory or superelastic properties. The main concern about the use of this alloy derives form the fact that it contains a large amount of nickel (55% by mass), which is suspected responsible for allergic, toxic and carcinogenic reactions. In this work, the in vitro corrosion behavior of two Ti-Nb-Sn shape memory alloys, Ti-16Nb-5Sn and Ti-18Nb-4Sn (mass%) has been investigated and compared with that of Nitinol. The in vitro corrosion resistance was assessed in naturally aerated Ringer's physiological solution at 37°C by corrosion potential and electrochemical impedance spectroscopy (EIS) measurements as a function of exposure time, and potentiodynamic polarization curves. Corrosion potential values indicated that both Ni-Ti and Ti-Nb-Sn alloys undergo spontaneous passivation due to spontaneously formed oxide film passivating the metallic surface, in the aggressive environment. It also indicated that the tendency for the formation of a spontaneous oxide is greater for the Ti-18Nb-5Sn alloy. Significantly low anodic current density values were obtained from the polarization curves, indicating a typical passive behaviour for all investigated alloys, but Nitinol exhibited breakdown of passivity at potentials above approximately 450 mV(SCE), suggesting lower corrosion protection characteristics of its oxide film compared to the Ti-Nb-Sn alloys. EIS studies showed high impedance values for all samples, increasing with exposure time, indicating an improvement in corrosion resistance of the spontaneous oxide film. The obtained EIS spectra were analyzed using an equivalent electrical circuit representing a duplex structure oxide film, composed by an outer and porous layer (low resistance), and an inner barrier layer (high resistance) mainly responsible for the alloys corrosion resistance. The resistance of passive film present on the metals' surface increases with exposure time displaying the highest values to Ti-18Nb-4Sn alloy. All these electrochemical results suggest that Ti-Nb-Sn alloys are promising materials for biomedical applications.
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Affiliation(s)
- F Rosalbino
- Politecnico di Torino, Dipartimento di Scienza dei Materiali e Ingegneria Chimica (DICHI), Torino, Italy.
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24
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Brammer KS, Frandsen CJ, Jin S. TiO2 nanotubes for bone regeneration. Trends Biotechnol 2012; 30:315-22. [PMID: 22424819 DOI: 10.1016/j.tibtech.2012.02.005] [Citation(s) in RCA: 166] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Revised: 02/14/2012] [Accepted: 02/15/2012] [Indexed: 01/09/2023]
Abstract
Nanostructured materials are believed to play a fundamental role in orthopedic research because bone itself has a structural hierarchy at the first level in the nanometer regime. Here, we report on titanium oxide (TiO(2)) surface nanostructures utilized for orthopedic implant considerations. Specifically, the effects of TiO(2) nanotube surfaces for bone regeneration will be discussed. This unique 3D tube shaped nanostructure created by electrochemical anodization has profound effects on osteogenic cells and is stimulating new avenues for orthopedic material surface designs. There is a growing body of data elucidating the benefits of using TiO(2) nanotubes for enhanced orthopedic implant surfaces. The current trends discussed within foreshadow the great potential of TiO(2) nanotubes for clinical use.
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Affiliation(s)
- Karla S Brammer
- Materials Science and Engineering, University of California, San Diego, La Jolla, CA 92093-0411, USA
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25
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Frandsen CJ, Brammer KS, Noh K, Connelly LS, Oh S, Chen LH, Jin S. Zirconium oxide nanotube surface prompts increased osteoblast functionality and mineralization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.07.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Duarte LT, Biaggio SR, Rocha-Filho RC, Bocchi N. Preparation and characterization of biomimetically and electrochemically deposited hydroxyapatite coatings on micro-arc oxidized Ti-13Nb-13Zr. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1663-1670. [PMID: 21562888 DOI: 10.1007/s10856-011-4338-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Accepted: 04/29/2011] [Indexed: 05/30/2023]
Abstract
Surface properties and corrosion resistance analyses of Ti-13Nb-13Zr coated by an oxide film (obtained by micro-arc oxidation at 300 V) or an oxide/hydroxyapatite (HA) film are reported. HA films were biomimetically or electrochemically deposited on the alloy/oxide surface, and their properties compared. Both the biomimetic and the electrochemical method yielded rough and globular apatite surfaces (10-20 μm globules for the former and 1-2 μm for the latter). As inferred from XRD data, the electrochemical method yielded more biologic-like HA films, while the biomimetic method yielded films containing a mixture of calcium phosphate phases. Coated Ti-13Nb-13Zr samples were immersed in an aerated PBS solution and continuously analyzed during 49 days. Considering that, after immersion, the biomimetically deposited films presented smaller variations in thickness and morphology and higher electric resistance (determined by electrochemical impedance spectroscopy), they clearly provide significantly better protection to the Ti-13Nb-13Zr alloy when in PBS solution.
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Affiliation(s)
- Laís T Duarte
- Departamento de Química, Universidade Federal de São Carlos, C.P. 676, São Carlos, SP 13566-970, Brazil
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27
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Wear resistance of experimental titanium alloys for dental applications. J Mech Behav Biomed Mater 2011; 4:1873-9. [PMID: 22098886 DOI: 10.1016/j.jmbbm.2011.06.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 06/04/2011] [Accepted: 06/06/2011] [Indexed: 11/23/2022]
Abstract
The present study evaluated microstructure, microhardness and wear resistance of experimental titanium alloys containing zirconium and tantalum. Alloys were melted in arc melting furnace according to the following compositions: Ti-5Zr, Ti-5Ta and Ti-5Ta-5Zr (%wt). Hemispheres and disks were obtained from wax patterns that were invested and cast by plasma. Microstructures were evaluated using optical microscopy and X-ray diffraction (XRD) analysis and also Vickers microhardness was measured. Hemispherical samples and disks were used for 2-body wear tests, performed by repeated grinding of the samples. Wear resistance was assessed as height loss after 40,000 cycles. The data were compared using ANOVA and post-hoc Tukey test. Ti-5Zr presented a Widmanstätten structure and the identified phases were α and α' while Ti-5Ta and Ti-5Ta-5Zr presented α, β, α' and α" phases, but the former presented a lamellar structure, and the other, acicular. The microhardness of Ti-5Zr was significantly greater than other materials and cp Ti presented wear resistance significantly lower than experimental alloys. It was concluded that wear resistance was improved when adding Ta and Zr to titanium and Zr increased microhardness of Ti-5Zr alloy.
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28
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Munro A, Cunningham MF, Jerkiewicz G. Spectral and physical properties of electrochemically formed colored layers on titanium covered with clearcoats. ACS APPLIED MATERIALS & INTERFACES 2011; 3:1195-1203. [PMID: 21410140 DOI: 10.1021/am2000196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present the application and characterization of two commercial polymer clearcoats to electrochemically formed colored passive layers on titanium with the aim of providing physical protection required in many of titanium's applications, while allowing the unique appearance of the colored layers to show through. Thin layers of an acrylic automotive clearcoat (∼3.5 μm thick) and an epoxy marine clearcoat (∼6.5 μm thick) are applied to the colored titanium surfaces using spin coating, and are found to slightly modify their visual properties, while maintaining their bright, well-defined sparkling colors. Both clearcoats are found to significantly reduce the surface roughness, thereby reducing potential wear from friction and the adhesion of fine dirt particles. They are also found to notably decrease the wetting properties of colored titanium, furthering its protection against damage from ambient and aqueous media. The clearcoats show the ability to protect colored titanium from physical and chemical damage, with the automotive clearcoat exhibiting superior adhesion. Our electrochemical coloring technique combined with the application of clearcoats creates a new and unique system that does not rely solely on a polymer coating for its colorful appearance and protection against corrosion.
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Affiliation(s)
- Andrew Munro
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
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29
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Ye X, Chen M, Yang M, Wei J, Liu D. In vitro corrosion resistance and cytocompatibility of nano-hydroxyapatite reinforced Mg-Zn-Zr composites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1321-1328. [PMID: 20012772 DOI: 10.1007/s10856-009-3954-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Accepted: 11/25/2009] [Indexed: 05/28/2023]
Abstract
Due to good biocompatibility and mechanical properties, magnesium (Mg) and its alloys are considered promising degradable materials for orthopedic applications. In this work, a Mg metal matrix composite (MMC) was fabricated using Mg-2.9Zn-0.7Zr alloy as the matrix and 1 wt% nano-hydroxyapatite (n-HA) particles as reinforcements. In vitro corrosion behavior and cytocompatibility of a Mg-Zn-Zr/n-HA composite and a Mg-Zn-Zr alloy were investigated. In contrast with the Mg-Zn-Zr alloy, the MMC has better properties. The average corrosion rate of MMC is 0.75 mm/yr after immersion in simulated body fluid (SBF) for 20 days, and the surface of MMC is covered with white Ca-P precipitates. The electrochemical test results show that the corrosion potential (E(corr)) of MMC increases to -1.615 V and its polarization resistance (R(p)) is 2.56 KOmega with the addition of n-HA particles. The co-cultivation of MMC with osteoblasts results in the adhesion and proliferation of cells on the surface of the composite. The maximum cell density is calculated to be (1.85+/-0.15) x 10(4)/l after 5 days of co-culture with osteoblasts. The average cell numbers for two groups after culturing for 3 and 5 days (P<0.05) are significantly different. All the results demonstrate that the Mg-Zn-Zr/n-HA composite can be potentially used as biodegradable bone fixation material.
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Affiliation(s)
- Xinyu Ye
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, China
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30
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Duarte LT, Biaggio SR, Rocha-Filho RC, Bocchi N. Influence of hydroxyapatite on the corrosion resistance of the Ti-13Nb-13Zr alloy. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:1009-1015. [PMID: 19083081 DOI: 10.1007/s10856-008-3662-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Accepted: 12/02/2008] [Indexed: 05/27/2023]
Abstract
Electrochemical analyses on the biocompatible alloy Ti-13Nb-13Zr wt% in an electrolyte simulating physiological medium (PBS solution) are reported. Hydroxyapatite (HA) films were obtained on the alloy by electrodeposition at constant cathodic current. Samples of the alloy covered with an anodic-oxide film or an anodic-oxide/HA film were analyzed by open circuit potential and electrochemical impedance spectroscopy measurements during 180 days in the PBS electrolyte. Analyses of the open-circuit potential (E (oc)) values indicated that the oxide/HA film presents better protection characteristics than the oxide only. This behavior was corroborated by the higher film resistances obtained from impedance data, indicating that, besides improving the alloy osteointegration, the hydroxyapatite film may also increase the corrosion protection of the biomaterial.
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Affiliation(s)
- Laís T Duarte
- Departamento de Química, Universidade Federal de São Carlos, Sao Carlos, SP, Brazil
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31
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Oliveira N, Biaggio S, Nascente P, Piazza S, Sunseri C, Di Quarto F. The effect of thickness on the composition of passive films on a Ti–50Zr at% alloy. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Oliveira NT, Ferreira EA, Duarte LT, Biaggio SR, Rocha-Filho RC, Bocchi N. Corrosion resistance of anodic oxides on the Ti–50Zr and Ti–13Nb–13Zr alloys. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2005.07.015] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Oliveira NTC, Biaggio SR, Nascente PAP, Rocha-Filho RC, Bocchi N. Investigation of passive films grown on biocompatible Ti-50Zr and Ti-13Zr-13Nb alloys by XPS. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2201] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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