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Bertuola M, Miñán A, Grillo CA, Cortizo MC, Fernández Lorenzo de Mele MA. Corrosion protection of AZ31 alloy and constrained bacterial adhesion mediated by a polymeric coating obtained from a phytocompound. Colloids Surf B Biointerfaces 2018; 172:187-196. [PMID: 30153620 DOI: 10.1016/j.colsurfb.2018.08.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 07/18/2018] [Accepted: 08/14/2018] [Indexed: 12/14/2022]
Abstract
The prevention of microbial biofilm formation on a biomaterial surface is crucial in avoiding implants failures and the development of antibiotic resistant bacteria. It was reported that biodegradable Mg alloys may show antimicrobial effects due to the alkalinization of the corroding area. However, this issue is controversial and deserves a detailed study, since the processes occurring at the [biodegradable metal/biological medium] interface are complex and varied. Results showed that bacterial adhesion on AZ31 was lower than that of the titanium control and revealed that was dependent on surface composition, depicting some preferential sites for bacterial attachment (C-, P-, O-containing corrosion products) and others that are particularly avoided (active corrosion sites). As a key challenge, a strategy able to improve the performance of Mg alloys by both, reducing the formation of corrosion products and inhibiting bacterial adhesion was subsequently developed. A polymeric layer (polyTOH) was obtained by electropolymerization of thymol (TOH), a phytophenolic compound. The polyTOH can operate as a multifunctional film that improves the surface characteristics of the AZ31 Mg alloy by enhancing corrosion resistance (ions release was reduced to almost the half during the first days) and create an anti-adherent surface (bacterial attachment was 30-fold lower on polyTOH-AZ31 than on non-coated Mg alloy and 200-fold lower than Ti control and was constrained to specific regions). This anti-adherent property implies an additional advantage: enhancement of the efficacy of antibiotic treatments.
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Affiliation(s)
- M Bertuola
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET), Facultad de Ciencias Exactas, Departamento de Química, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina.
| | - A Miñán
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET), Facultad de Ciencias Exactas, Departamento de Química, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina.
| | - C A Grillo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET), Facultad de Ciencias Exactas, Departamento de Química, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina.
| | - M C Cortizo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET), Facultad de Ciencias Exactas, Departamento de Química, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina; Facultad de Odontología, Universidad Nacional de La Plata, Calle 50 y 1, 1900, La Plata, Argentina.
| | - M A Fernández Lorenzo de Mele
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA, CCT La Plata-CONICET), Facultad de Ciencias Exactas, Departamento de Química, Universidad Nacional de La Plata, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina; Facultad de Ingeniería, Universidad Nacional de La Plata, Calle 47 y 1, 1900, La Plata, Argentina.
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Hermawan H. Updates on the research and development of absorbable metals for biomedical applications. Prog Biomater 2018; 7:93-110. [PMID: 29790132 PMCID: PMC6068061 DOI: 10.1007/s40204-018-0091-4] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 05/17/2018] [Indexed: 12/12/2022] Open
Abstract
Absorbable metals, metals that corrode in physiological environment, constitute a new class of biomaterials intended for temporary medical implant applications. The introduction of these metals has shifted the established paradigm of metal implants from preventing corrosion to its direct application. Interest toward absorbable metals has been growing in the past decade. This is proved by the rapid increase in scientific publication, progressive development of standards, and launching the first commercial products. Iron, magnesium, zinc, and their alloys are the current three absorbable metals families. Magnesium-based metals are the most progressing family with a large data set obtained from both basic and translational research. Iron-based metals are still facing a major challenge of low in vivo corrosion rate despite the significant efforts that have been put to overcome its weakness. Zinc-based metals are the new alternative absorbable metals with moderate corrosion rates that fall between those of iron and magnesium. This manuscript provides a brief review on the latest progress in the research and development of absorbable metals, the most important findings, the remaining challenges, and the perspective on the future direction.
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Affiliation(s)
- Hendra Hermawan
- Department of Mining, Metallurgical and Materials Engineering and CHU de Québec Research Center, Laval University, Quebec City, G1V 0A6, Canada.
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53
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Gonzalez J, Hou RQ, Nidadavolu EPS, Willumeit-Römer R, Feyerabend F. Magnesium degradation under physiological conditions - Best practice. Bioact Mater 2018; 3:174-185. [PMID: 29744455 PMCID: PMC5935771 DOI: 10.1016/j.bioactmat.2018.01.003] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/15/2018] [Accepted: 01/15/2018] [Indexed: 12/27/2022] Open
Abstract
This review focusses on the application of physiological conditions for the mechanistic understanding of magnesium degradation. Despite the undisputed relevance of simplified laboratory setups for alloy screening purposes, realistic and predictive in vitro setups are needed. Due to the complexity of these systems, the review gives an overview about technical measures, defines some caveats and can be used as a guideline for the establishment of harmonized laboratory approaches. Physiological conditions are mandatory for mechanistic understanding of magnesium degradation. Guidelines and caveats for experimental setups are reviewed. Media composition is essential for reliable experiments.
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Affiliation(s)
- Jorge Gonzalez
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Rui Qing Hou
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Eshwara P S Nidadavolu
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Regine Willumeit-Römer
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
| | - Frank Feyerabend
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany
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Zhang H, Xie L, Shen X, Shang T, Luo R, Li X, You T, Wang J, Huang N, Wang Y. Catechol/polyethyleneimine conversion coating with enhanced corrosion protection of magnesium alloys: potential applications for vascular implants. J Mater Chem B 2018; 6:6936-6949. [DOI: 10.1039/c8tb01574k] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A catechol/polyethyleneimine conversion coating on a MgZnMn alloy possessed good corrosion resistance. Heparin was further grafted on it and this showed the potential for surface modification of magnesium-based vascular implants.
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Affiliation(s)
- Hao Zhang
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Lingxia Xie
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Xiaolong Shen
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Tengda Shang
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Xin Li
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Tianxue You
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Jin Wang
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Nan Huang
- School of Materials Science and Engineering
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
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Yang Z, Xu W, Ji M, Xie A, Shen Y, Zhu M. A pH‐Sensitive Composite with Controlled Multistage Drug Release for Synergetic Photothermal Therapy and Chemotherapy. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zheng Yang
- College of Chemistry and Chemical Engineering Collaborative Innovation Center of Modern Bio‐manufacture Anhui University 230601 Hefei P. R. China
| | - Wanghua Xu
- College of Chemistry and Chemical Engineering Anqing Normal University 246133 Anqing P.R. China
| | - Mingxiang Ji
- College of Chemistry and Chemical Engineering Collaborative Innovation Center of Modern Bio‐manufacture Anhui University 230601 Hefei P. R. China
| | - Anjian Xie
- College of Chemistry and Chemical Engineering Collaborative Innovation Center of Modern Bio‐manufacture Anhui University 230601 Hefei P. R. China
| | - Yuhua Shen
- College of Chemistry and Chemical Engineering Collaborative Innovation Center of Modern Bio‐manufacture Anhui University 230601 Hefei P. R. China
| | - Manzhou Zhu
- College of Chemistry and Chemical Engineering Collaborative Innovation Center of Modern Bio‐manufacture Anhui University 230601 Hefei P. R. China
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Hydrothermal treatment and butylphosphonic acid derived self-assembled monolayers for improving the surface chemistry and corrosion resistance of AZ61 magnesium alloy. Sci Rep 2017; 7:16910. [PMID: 29203906 PMCID: PMC5715064 DOI: 10.1038/s41598-017-17199-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 11/22/2017] [Indexed: 11/24/2022] Open
Abstract
The hydrothermal treatment followed by a self-assembled monolayer (SAM) of 1-butylphosphonic acid through the tethering by aggregation and growth (T-BAG) method was employed to produce protective surface coatings on the Mg-6Al-1Zn alloy (AZ61) for reducing the degradation rate in physiological environments. Potentiodynamic polarization measurements revealed that the organic self-assembled monolayer and Mg(OH)2 coating can further enhance the surface chemical stability and corrosion resistance of Mg alloys. SAM-treated Mg(OH)2 coatings can be served as a more passive surface layer as a result of their much higher charge transfer resistance and the presence of Warburg impedance in electrochemical impedance spectroscopy measurement.
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57
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In vitro model of potential metal cation exchanges in biological apatite. Biointerphases 2017; 13:018501. [PMID: 29161878 DOI: 10.1116/1.5004453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biological apatite is ion-doped and provides an active pool for the exchange with foreign impurity ions. In this work, an in vitro model of hydrated metastable octacalcium phosphate (OCP) crystals was established to mimetically investigate the distinct exchange of trivalent and divalent cations (Fe3+ and Sr2+) with biological apatite. Fe3+ significantly promoted the collapses of OCP crystals and the formation of amorphous sol-like ferric phosphates, while Sr2+ facilitated the epitaxial growth and stability of OCP crystals. The involvement of Ca2+ maintained the crystalline integrity and inhibited the ion exchange within OCP crystals. This in vitro model would lay the foundation for the further investigation of the metabolism of biological apatite.
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58
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Antimicrobial and Osseointegration Properties of Nanostructured Titanium Orthopaedic Implants. MATERIALS 2017; 10:ma10111302. [PMID: 29137166 PMCID: PMC5706249 DOI: 10.3390/ma10111302] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/01/2017] [Accepted: 11/08/2017] [Indexed: 02/06/2023]
Abstract
The surface design of titanium implants influences not only the local biological reactions but also affects at least the clinical result in orthopaedic application. During the last decades, strong efforts have been made to improve osteointegration and prevent bacterial adhesion to these surfaces. Following the rule of “smaller, faster, cheaper”, nanotechnology has encountered clinical application. It is evident that the hierarchical implant surface micro- and nanotopography orchestrate the biological cascades of early peri-implant endosseous healing or implant loosening. This review of the literature gives a brief overview of nanostructured titanium-base biomaterials designed to improve osteointegration and prevent from bacterial infection.
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Johnson I, Jiang W, Liu H. The Effects of Serum Proteins on Magnesium Alloy Degradation in Vitro. Sci Rep 2017; 7:14335. [PMID: 29084971 PMCID: PMC5662685 DOI: 10.1038/s41598-017-14479-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 10/11/2017] [Indexed: 12/22/2022] Open
Abstract
Magnesium (Mg) alloys are promising materials for biodegradable implants, but their clinical translation requires improved control over their degradation rates. Proteins may be a major contributing factor to Mg alloy degradation, but are not yet fully understood. This article reports the effects of fetal bovine serum (FBS), a physiologically relevant mixture of proteins, on Mg and Mg alloy degradation. FBS had little impact on mass loss of pure Mg during immersion degradation, regardless of whether or not a native oxide layer was present on the sample surface. FBS reduced the mass loss of Mg-Yttrium (MgY) alloy with an oxidized surface during immersion degradation, but increased the mass loss for the same alloy with a metallic surface (surface oxides were removed). FBS also influenced the mode of degradation by limiting the depth of pit formation during degradation processes on commercially pure Mg with metallic or oxidized surfaces and on MgY alloy with oxidized surfaces. The results demonstrated that serum proteins had significant interactions with Mg-based biodegradable metals, and these interactions may be modified by alloy composition and processing. Therefore, proteins should be taken into account when designing experiments to assess degradation of Mg-based implants.
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Affiliation(s)
- Ian Johnson
- Department of Bioengineering, University of California at Riverside, Riverside, CA, 92521, USA
| | - Wensen Jiang
- Materials Science and Engineering, University of California at Riverside, Riverside, CA, 92521, USA
| | - Huinan Liu
- Department of Bioengineering, University of California at Riverside, Riverside, CA, 92521, USA.
- Materials Science and Engineering, University of California at Riverside, Riverside, CA, 92521, USA.
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60
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Liu XQ, Tang RZ. Biological responses to nanomaterials: understanding nano-bio effects on cell behaviors. Drug Deliv 2017; 24:1-15. [PMID: 29069934 PMCID: PMC8812585 DOI: 10.1080/10717544.2017.1375577] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Xi-Qiu Liu
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Rui-Zhi Tang
- Lab of Inflammation & Cancer, Institut de Génétique Moléculaire de Montpellier, Montpellier, France
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61
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Insight into cytotoxicity of Mg nanocomposites using MTT assay technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:647-652. [DOI: 10.1016/j.msec.2017.04.129] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 04/21/2017] [Indexed: 12/14/2022]
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Peng F, Wang D, Tian Y, Cao H, Qiao Y, Liu X. Sealing the Pores of PEO Coating with Mg-Al Layered Double Hydroxide: Enhanced Corrosion Resistance, Cytocompatibility and Drug Delivery Ability. Sci Rep 2017; 7:8167. [PMID: 28811545 PMCID: PMC5557750 DOI: 10.1038/s41598-017-08238-w] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/10/2017] [Indexed: 11/21/2022] Open
Abstract
In recent years, magnesium (Mg) alloys show a promising application in clinic as degradable biomaterials. Nevertheless, the poor corrosion resistance of Mg alloys is the main obstacle to their clinical application. Here we successfully seal the pores of plasma electrolytic oxidation (PEO) coating on AZ31 with Mg-Al layered double hydroxide (LDH) via hydrothermal treatment. PEO/LDH composite coating possess a two layer structure, an inner layer made up of PEO coating (~5 μm) and an outer layer of Mg-Al LDH (~2 μm). Electrochemical and hydrogen evolution tests suggest preferable corrosion resistance of the PEO/LDH coating. Cytotoxicity, cell adhesion, live/dead staining and proliferation data of rat bone marrow stem cells (rBMSCs) demonstrate that PEO/LDH coating remarkably enhance the cytocompatibility of the substrate, indicating a potential application in orthopedic surgeries. In addition, hemolysis rate (HR) test shows that the HR value of PEO/LDH coating is 1.10 ± 0.47%, fulfilling the request of clinical application. More importantly, the structure of Mg-Al LDH on the top of PEO coating shows excellent drug delivery ability.
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Affiliation(s)
- Feng Peng
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Donghui Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yaxin Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huiliang Cao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Yuqin Qiao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
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63
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Bai C, Li J, Ta W, Li B, Han Y. In vivo Study on the Corrosion Behavior of Magnesium Alloy Surface Treated with Micro-arc Oxidation and Hydrothermal Deposition. Orthop Surg 2017; 9:296-303. [PMID: 28960817 PMCID: PMC6584445 DOI: 10.1111/os.12342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/04/2017] [Indexed: 11/30/2022] Open
Abstract
OBJECTIVE To study the corrosion behavior of magnesium alloy surface treated with micro-arc oxidation and hydrothermal deposition in living animals. METHODS A magnesium oxide (MgO) layer was prepared on Mg alloy using micro-arc oxidation technology, and then a composite coating composed of magnesium hydroxide, hydroxyapatite, and MgO was coated on the MgO layer using the hydrothermal deposition method for 2 h and 24 h. Male 3-month-old white New Zealand rabbits (n = 48) weighting 2200-2300 g, were divided into four groups randomly. The prepared Mg alloy samples with composite coatings were implanted into the femoral medullary cavity of rabbits. For the Mg group, bare Mg samples without any treatment were implanted; for the MgO group, bare Mg samples undergoing MAO treatment were implanted; for the HT2h group, samples of the MgO group undergoing hydrothermal treatment (HT) for 2 h were implanted; and for the HT24h group, samples of group MgO undergoing HT for 24 h were implanted. Then the in vivo corrosion behaviors of implants were evaluated by X-ray observation, micro-CT analysis and serum Mg2+ examination. RESULTS The X-ray showed that samples implanted in animals were decreased as time went by. The micro-CT showed that on the fourth week, the residual volume percentages (RVP) of samples of the Mg, MgO, HT2h, and HT24h groups were 72.81% ± 2.10%, 71.68% ± 1.49%, 81.14% ± 1.54%, and 82.04% ± 0.89%, respectively; on the eighth week, the RVP of four groups were 29.45% ± 1.06%, 41.82% ± 1.13%, 53.92% ± 0.37%, and 62.53% ± 2.06%, respectively; while on the 12th week, RVP were 8.45% ± 0.49%, 9.97% ± 0.75%, 37.09% ± 0.89%, 46.71% ± 1.87%. The RVP of the HT2h group and the HT24h group were higher than for the Mg group and the MgO group for all three time points (P < 0.05); the RVP for HT24h was higher than for HT2h at 8 and 12 weeks, and the differences were significant, indicating that the degradation of Mg alloy slowed down after composite coating. In addition, the composite-coated Mg alloy by 24-h hydrothermal treatment exhibited a slower degradation than that treated by 2 h. Serum Mg2+ concentration results showed that on the second week, the Mg2+ concentrations of the Mg, MgO, HT2h, and HT24h groups were 2.24 ± 0.10 mmol/L, 2.12 ± 0.07 mmol/L, 2.06 ± 0.11 mmol/L, and 2.15 ± 0.12 mmol/L, respectively. On the fourth week, these concentrations were 1.99 ± 0.33 mmol/L, 2.18 ± 0.06 mmol/L, 2.17 ± 0.09 mmol/L, and 2.13 ± 0.14 mmol/L, respectively. On the eighth week, the concentrations were 2.22 ± 0.09 mmol/L, 2.20 ± 0.17 mmol/L, 2.06 ± 0.11 mmol/L, and 2.14 ± 0.07 mmol/L, respectively. On the 12th week, the concentrations were 2.18 ± 0.04 mmol/L, 2.20 ± 0.08 mmol/L, 2.09 ± 0.02 mmol/L, and 2.16 ± 0.11 mmol/L. CONCLUSION The combination of micro-arc oxidation and hydrothermal deposition can greatly improve the anti-corrosion behavior of Mg alloy, and Mg alloy coated with this composite coating is a promising biomaterial with a satisfactory degradation rate.
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Affiliation(s)
- Chuan‐yi Bai
- Department of Orthopaedic SurgeryThe Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina
| | - Jian‐wu Li
- Department of Orthopaedic SurgeryArmed Police Corps Hospital of ShaanxiXi’anChina
| | - Wan‐bao Ta
- Department of Orthopaedic SurgeryThe Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina
| | - Bo Li
- Department of Orthopaedic SurgeryThe Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’anChina
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64
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Physico-mechanical and morphological features of zirconia substituted hydroxyapatite nano crystals. Sci Rep 2017; 7:43202. [PMID: 28256557 PMCID: PMC5335334 DOI: 10.1038/srep43202] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 01/18/2017] [Indexed: 11/11/2022] Open
Abstract
Zirconia doped Hydroxyapatite (HAP) nanocrystals [Ca10(PO4)6−x(ZrO2)x(OH)2]; (0 ≤ x ≤ 1 step 0.2) were synthesized using simple low cost facile method. The crystalline phases were examined by X-ray diffraction (XRD). The crystallinity percentage decreased with increasing zirconia content for the as-synthesized samples. The existence of zirconia as secondary phase on the grain boundaries; as observed from scanning electron micrographs (FESEM); resulted in negative values of microstrain. The crystallite size was computed and the results showed that it increased with increasing annealing temperature. Thermo-gravimetric analysis (TGA) assured the thermal stability of the nano crystals over the temperature from room up to 1200 °C depending on the zirconia content. The corrosion rate was found to decrease around 25 times with increasing zirconia content from x = 0.0 to 1.0. Microhardness displayed both compositional and temperature dependence. For the sample (x = 0.6), annealed at 1200 °C, the former increased up to 1.2 times its original value (x = 0.0).
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65
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Hiromoto S, Yamazaki T. Micromorphological effect of calcium phosphate coating on compatibility of magnesium alloy with osteoblast. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2017; 18:96-109. [PMID: 28179963 PMCID: PMC5259964 DOI: 10.1080/14686996.2016.1266238] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/24/2016] [Accepted: 11/25/2016] [Indexed: 05/15/2023]
Abstract
Octacalcium phosphate (OCP) and hydroxyapatite (HAp) coatings were developed to control the degradation speed and to improve the biocompatibility of biodegradable magnesium alloys. Osteoblast MG-63 was cultured directly on OCP- and HAp-coated Mg-3Al-1Zn (wt%, AZ31) alloy (OCP- and HAp-AZ31) to evaluate cell compatibility. Cell proliferation was remarkably improved with OCP and HAp coatings which reduced the corrosion and prevented the H2O2 generation on Mg alloy substrate. OCP-AZ31 showed sparse distribution of living cell colonies and dead cells. HAp-AZ31 showed dense and homogeneous distribution of living cells, with dead cells localized over and around corrosion pits, some of which were formed underneath the coating. These results demonstrated that cells were dead due to changes in the local environment, and it is necessary to evaluate the local biocompatibility of magnesium alloys. Cell density on HAp-AZ31 was higher than that on OCP-AZ31 although there was not a significant difference in the amount of Mg ions released in medium between OCP- and HAp-AZ31. The outer layer of OCP and HAp coatings consisted of plate-like crystal with a thickness of around 0.1 μm and rod-like crystals with a diameter of around 0.1 μm, respectively, which grew from a continuous inner layer. Osteoblasts formed focal contacts on the tips of plate-like OCP and rod-like HAp crystals, with heights of 2-5 μm. The spacing between OCP tips of 0.8-1.1 μm was wider than that between HAp tips of 0.2-0.3 μm. These results demonstrated that cell proliferation depended on the micromorphology of the coatings which governed spacing of focal contacts. Consequently, HAp coating is suitable for improving cell compatibility and bone-forming ability of the Mg alloy.
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Affiliation(s)
- Sachiko Hiromoto
- Corrosion Property Group, Research Center for Structural Materials, National Institute for Materials Science, Tsukuba, Japan
| | - Tomohiko Yamazaki
- Biosystem Control Group, Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
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Ibrahim H, Esfahani SN, Poorganji B, Dean D, Elahinia M. Resorbable bone fixation alloys, forming, and post-fabrication treatments. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:870-888. [DOI: 10.1016/j.msec.2016.09.069] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/31/2016] [Accepted: 09/28/2016] [Indexed: 12/13/2022]
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67
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Peng F, Li H, Wang D, Tian P, Tian Y, Yuan G, Xu D, Liu X. Enhanced Corrosion Resistance and Biocompatibility of Magnesium Alloy by Mg-Al-Layered Double Hydroxide. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35033-35044. [PMID: 27983794 DOI: 10.1021/acsami.6b12974] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Magnesium (Mg) and its alloys have been suggested as revolutionary biodegradable materials. However, fast degradation hinders its clinic application. To improve the corrosion resistance and biocompatibility of Mg-Nd-Zn-Zr alloy (JDBM), magnesium-aluminum-layered double hydroxide (Mg-Al LDH) was successfully introduced into Mg(OH)2 coating by hydrothermal treatment. The anions in the interlayer of Mg-Al LDH can be replaced by chloride ions, resulting in a relatively low chloride ion concentration near the surface of the coating. The favorable corrosion resistance of the coating was proved by polarization curves and hydrogen collection test. The Mg-Al LDH significantly promoted cell adhesion, migration and proliferation in vitro. In addition, the coating almost fulfilled the request of the clinical application in the hemolysis ratio test. Finally, in vivo results indicated that the coating offered the greatest long-lasting protection from corrosion and triggered the mildest inflammation comparing to the pure Mg(OH)2 coatings and untreated magnesium alloy. Mg(OH)2 coating containing Mg-Al LDH in the present study shows a promising application in improving anticorrosion and biocompatibility of Mg alloys, and might act as a platform for a further modification of Mg alloys ascribed to its special layer structure.
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Affiliation(s)
- Feng Peng
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Hua Li
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University , Shanghai 200032, China
| | - Donghui Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Peng Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China
| | - Yaxin Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Guangyin Yuan
- National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Demin Xu
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University , Shanghai 200032, China
| | - Xuanyong Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, China
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68
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Tkacz J, Minda J, Fintová S, Wasserbauer J. Comparison of Electrochemical Methods for the Evaluation of Cast AZ91 Magnesium Alloy. MATERIALS 2016; 9:ma9110925. [PMID: 28774046 PMCID: PMC5457233 DOI: 10.3390/ma9110925] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 11/03/2016] [Accepted: 11/10/2016] [Indexed: 11/16/2022]
Abstract
Linear polarization is a potentiodynamic method used for electrochemical characterization of materials. Obtained values of corrosion potential and corrosion current density offer information about material behavior in corrosion environments from the thermodynamic and kinetic points of view, respectively. The present study offers a comparison of applications of the linear polarization method (from -100 mV to +200 mV vs. EOCP), the cathodic polarization of the specimen (-100 mV vs. EOCP), and the anodic polarization of the specimen (+100 mV vs. EOCP), and a discussion of the differences in the obtained values of the electrochemical characteristics of cast AZ91 magnesium alloy. The corrosion current density obtained by cathodic polarization was similar to the corrosion current density obtained by linear polarization, while a lower value was obtained by anodic polarization. Signs of corrosion attack were observed only in the case of linear polarization including cathodic and anodic polarization of the specimen.
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Affiliation(s)
- Jakub Tkacz
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Brno 612 00, Czech Republic.
| | - Jozef Minda
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Brno 612 00, Czech Republic.
| | - Stanislava Fintová
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Brno 612 00, Czech Republic.
- Institute of Physics of Materials, Academy of Sciences of the Czech Republic v. v. i., Žižkova 22, Brno 616 62, Czech Republic.
| | - Jaromír Wasserbauer
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Brno 612 00, Czech Republic.
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69
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Yu W, Zhao H, Ding Z, Zhang Z, Sun B, Shen J, Chen S, Zhang B, Yang K, Liu M, Chen D, He Y. In vitro and in vivo evaluation of MgF 2 coated AZ31 magnesium alloy porous scaffolds for bone regeneration. Colloids Surf B Biointerfaces 2016; 149:330-340. [PMID: 27792982 DOI: 10.1016/j.colsurfb.2016.10.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/19/2016] [Accepted: 10/21/2016] [Indexed: 02/05/2023]
Abstract
Porous magnesium scaffolds are attracting increasing attention because of their degradability and good mechanical property. In this work, a porous and degradable AZ31 magnesium alloy scaffold was fabricated using laser perforation technique. To enhance the corrosion resistance and cytocompatibility of the AZ31 scaffolds, a fluoride treatment was used to acquire the MgF2 coating. Enhanced corrosion resistance was confirmed by immersion and electrochemical tests. Due to the protection provided by the MgF2 coating, the magnesium release and pH increase resulting from the degradation of the FAZ31 scaffolds were controllable. Moreover, in vitro studies revealed that the MgF2 coated AZ31 (FAZ31) scaffolds enhanced the proliferation and attachment of rat bone marrow stromal cells (rBMSCs) compared with the AZ31 scaffolds. In addition, our present data indicated that the extract of the FAZ31 scaffold could enhance the osteogenic differentiation of rBMSCs. To compare the in vivo bone regenerative capacity of the AZ31 and FAZ31 scaffolds, a rabbit femoral condyle defect model was used. Micro-computed tomography (micro-CT) and histological examination were performed to evaluate the degradation of the scaffolds and bone volume changes. In addition to the enhanced the corrosion resistance, the FAZ31 scaffolds were more biocompatible and induced significantly more new bone formation in vivo. Conversely, bone resorption was observed from the AZ31 scaffolds. These promising results suggest potential clinical applications of the fluoride pretreated AZ31 scaffold for bone tissue repair and regeneration.
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Affiliation(s)
- Weilin Yu
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Huakun Zhao
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Zhenyu Ding
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Zhiwang Zhang
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Benben Sun
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Ji Shen
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China
| | - Shanshan Chen
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - Bingchun Zhang
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - Ke Yang
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China
| | - Meixia Liu
- Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China.
| | - Daoyun Chen
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
| | - Yaohua He
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
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70
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Current status on clinical applications of magnesium-based orthopaedic implants: A review from clinical translational perspective. Biomaterials 2016; 112:287-302. [PMID: 27770632 DOI: 10.1016/j.biomaterials.2016.10.017] [Citation(s) in RCA: 353] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 10/10/2016] [Accepted: 10/11/2016] [Indexed: 12/30/2022]
Abstract
As a new generation of medical metallic material, magnesium (Mg) and its alloys with or without surface coating have attracted a great deal of attention due to its biodegradability and potential for avoiding a removal operation after the implant has fulfilled its function for surgical fixation of injured musculoskeletal tissues. Although a few clinical cases on Mg-based orthopaedic implants were reported more than a century ago, it was not until recently that clinical trials using these implants with improved physicochemical properties were carried out in Germany, China and Korea for bone fracture fixation. The promising results so far suggest a bright future for biodegradable Mg-based orthopaedic implants and would warrant large scale phase II/III studies. Given the increasing interest on this emerging biomaterials and intense effort to improve its properties for various clinical applications, this review covers the evolution, current strategies, and future perspectives in the development of Mg-based orthopaedic implants. We also highlight a few clinical cases performed in China that may be unfamiliar to the general orthopaedic community.
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71
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Pan C, Hu Y, Hou Y, Liu T, Lin Y, Ye W, Hou Y, Gong T. Corrosion resistance and biocompatibility of magnesium alloy modified by alkali heating treatment followed by the immobilization of poly (ethylene glycol), fibronectin and heparin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:438-449. [PMID: 27770914 DOI: 10.1016/j.msec.2016.09.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/22/2016] [Accepted: 09/12/2016] [Indexed: 01/31/2023]
Abstract
In recent years, magnesium alloys are attracting more and more attention as a kind of biodegradable metallic biomaterials, however, their uncontrollable biodegradation speed in vivo and the limited surface biocompatibility hinder their clinical applications. In the present study, with the aim of improving the corrosion resistance and biocompatibility, the magnesium alloy (AZ31B) surface was modified by alkali heating treatment followed by the self-assembly of 3-aminopropyltrimethoxysilane (APTMS). Subsequently, poly (ethylene glycol) (PEG) and fibronectin or fibronectin/heparin complex were sequentially immobilized on the modified surface. The results of attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed that the above molecules were successfully immobilized on the magnesium alloy surface. An excellent hydrophilic surface was obtained after the alkali heating treatment while the hydrophilicity decreased to some degree after the self-assembly of APTMS, the surface hydrophilicity was gradually improved again after the immobilization of PEG, fibronectin or fibronectin/heparin complex. The corrosion resistance of the control magnesium alloy was significantly improved by the alkali heating treatment. The self-assembly of APTMS and the following immobilization of PEG further enhanced the corrosion resistance of the substrates, however, the grafting of fibronectin or fibronectin/heparin complex slightly lowered the corrosion resistance. As compared to the pristine magnesium alloy, the samples modified by the immobilization of PEG and fibronectin/heparin complex presented better blood compatibility according to the results of hemolysis assay and platelet adhesion as well as the activated partial thromboplastin time (APTT). In addition, the modified substrates had better cytocompatibility to endothelial cells due to the improved anticorrosion and the introduction of fibronectin. The substrates modified by fibronectin or fibronectin/heparin complex can significantly promote endothelial cell adhesion and proliferation. Taking all these results into consideration, the method of the present study can be used for the surface modification of the magnesium alloy to simultaneously impart it better corrosion resistance, favorable blood compatibility and good cytocompatibility to endothelial cells.
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Affiliation(s)
- Changjiang Pan
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China.
| | - Youdong Hu
- Department of Geriatrics, The Affiliated Huai'an Hospital of Xuzhou Medical College, Huai'an 223003, China
| | - Yu Hou
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
| | - Tao Liu
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
| | - Yuebin Lin
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
| | - Wei Ye
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
| | - Yanhua Hou
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
| | - Tao Gong
- Jiangsu Provincial Key Laboratory for Interventional Medical Devices, Huaiyin Institute of Technology, Huai'an 223003, China
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72
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Böke F, Giner I, Keller A, Grundmeier G, Fischer H. Plasma-Enhanced Chemical Vapor Deposition (PE-CVD) yields better Hydrolytical Stability of Biocompatible SiOx Thin Films on Implant Alumina Ceramics compared to Rapid Thermal Evaporation Physical Vapor Deposition (PVD). ACS APPLIED MATERIALS & INTERFACES 2016; 8:17805-17816. [PMID: 27299181 DOI: 10.1021/acsami.6b04421] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Densely sintered aluminum oxide (α-Al2O3) is chemically and biologically inert. To improve the interaction with biomolecules and cells, its surface has to be modified prior to use in biomedical applications. In this study, we compared two deposition techniques for adhesion promoting SiOx films to facilitate the coupling of stable organosilane monolayers on monolithic α-alumina; physical vapor deposition (PVD) by thermal evaporation and plasma enhanced chemical vapor deposition (PE-CVD). We also investigated the influence of etching on the formation of silanol surface groups using hydrogen peroxide and sulfuric acid solutions. The film characteristics, that is, surface morphology and surface chemistry, as well as the film stability and its adhesion properties under accelerated aging conditions were characterized by means of X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and tensile strength tests. Differences in surface functionalization were investigated via two model organosilanes as well as the cell-cytotoxicity and viability on murine fibroblasts and human mesenchymal stromal cells (hMSC). We found that both SiOx interfaces did not affect the cell viability of both cell types. No significant differences between both films with regard to their interfacial tensile strength were detected, although failure mode analyses revealed a higher interfacial stability of the PE-CVD films compared to the PVD films. Twenty-eight day exposure to simulated body fluid (SBF) at 37 °C revealed a partial delamination of the thermally deposited PVD films whereas the PE-CVD films stayed largely intact. SiOx layers deposited by both PVD and PE-CVD may thus serve as viable adhesion-promoters for subsequent organosilane coupling agent binding to α-alumina. However, PE-CVD appears to be favorable for long-term direct film exposure to aqueous solutions.
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Affiliation(s)
- Frederik Böke
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital , Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Ignacio Giner
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Adrian Keller
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Guido Grundmeier
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital , Pauwelsstrasse 30, 52074 Aachen, Germany
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73
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Ding ZZ, Fan ZH, Huang XW, Bai SM, Song DW, Lu Q, Kaplan DL. Bioactive Natural Protein-Hydroxyapatite Nanocarriers for Optimizing Osteogenic Differentiation of Mesenchymal Stem Cells. J Mater Chem B 2016; 4:3555-3561. [PMID: 27482381 PMCID: PMC4959278 DOI: 10.1039/c6tb00509h] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Improving the controlled release of bioactive growth factors to regulate cell behavior and tissue regeneration remains a need in tissue engineering and regenerative medicine. Inorganic and polymeric nanoparticles have been extensively fabricated as bioactive biomaterials with enhanced biocompatibility and effective carriers of therapeutic agents, however, challenges remain such as the achievement of high loading capacity and sustained release, and the bioactivity preservation of growth factors. Here, a multilayered, silk coated hydroxyapatite (HA) nanocarrier with drug loading-release capacity superior to pure silk or HA nanoparticles was developed. Bone morphogenetic protein-2 (BMP-2) was bound to the silk coatings with a high binding efficiency of 99.6%, significantly higher than that in silk or the HA nanoparticles alone. The release of BMP-2 was sustained in vitro over a period of 21 days without burst release. Compared with BMP-2 loaded silk or HA particles, bone mesenchymal stem cells (BMSCs) showed improved proliferation and osteogenesis when cultured with the BMP-2 loaded composite nanocarriers. Therefore, these silk-HA composite nanoparticles present a useful approach to designing bioactive nanocarrier systems with enhanced functions for bone tissue regeneration needs.
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Affiliation(s)
- Z. Z. Ding
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, People’s Republic of China
| | - Z. H. Fan
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou 215000, People’s Republic of China
| | - X. W. Huang
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - S. M. Bai
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - D. W. Song
- Tai’an City Central Hospital, Taian 271000, People’s Republic of China Address
| | - Q. Lu
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - D. L. Kaplan
- National Engineering Laboratory for Modern Silk and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, United States
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74
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Miura C, Shimizu Y, Imai Y, Mukai T, Yamamoto A, Sano Y, Ikeo N, Isozaki S, Takahashi T, Oikawa M, Kumamoto H, Tachi M. In vivo corrosion behaviour of magnesium alloy in association with surrounding tissue response in rats. ACTA ACUST UNITED AC 2016; 11:025001. [PMID: 26947358 DOI: 10.1088/1748-6041/11/2/025001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Biodegradable magnesium (Mg) alloys are the most promising candidates for osteosynthesis devices. However, their in vivo corrosion behaviour has not been fully elucidated. The aim of this study was to clarify the influence of the physiological environment surrounding Mg alloys on their corrosion behaviour. A Mg-1.0Al alloy with a fine-grained structure was formed into plates using titanium (Ti) as a control. These plates were implanted into the subperiosteum in the head, subcutaneous tissue of the back, and in the muscle of the femur of rats for 1, 2 and 4 weeks. The volumes of the remaining Mg alloy and of the insoluble salt deposition and gas cavities around the Mg alloy were determined by microtomography, and the volume losses were calculated. Then, the tissue response around the plates in each implantation site was examined histopathologically, and its relation to the respective volume loss was analyzed. These analyses determined that the Mg alloy was corroded fastest in the head, at an intermediate level in the back, and slowest in the femur. The insoluble salt deposition at the Mg alloy surface had no influence on the volume loss. Gas cavities formed around the Mg alloy at all implantation sites and decreased after 4 weeks. Histopathological examination revealed that the Mg alloy exhibited good biocompatibility, as was seen with Ti. In addition, vascularized fibrous capsules formed around the plates and became mature with time. Notably, the volume loss in the different anatomical locations correlated with capsule thickness. Together, our results suggest that, to facilitate the successful clinical application of Mg alloys, it will be necessary to further comprehend their interactions with specific in vivo environments.
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Affiliation(s)
- Chieko Miura
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
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75
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Wang SH, Yang CW, Lee TM. Evaluation of Microstructural Features and in Vitro Biocompatibility of Hydrothermally Coated Fluorohydroxyapatite on AZ80 Mg Alloy. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04583] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Si-Han Wang
- Department
of Materials Science and Engineering, National Formosa University, No.
64, Wunhua Road, Huwei, Yunlin 63201, Taiwan, ROC
| | - Chung-Wei Yang
- Department
of Materials Science and Engineering, National Formosa University, No.
64, Wunhua Road, Huwei, Yunlin 63201, Taiwan, ROC
| | - Tzer-Min Lee
- Institute
of Oral Medicine, National Cheng Kung University, No. 1, University Road, Tainan 70101, Taiwan, ROC
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76
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Sriranganathan D, Kanwal N, Hing KA, Hill RG. Strontium substituted bioactive glasses for tissue engineered scaffolds: the importance of octacalcium phosphate. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:39. [PMID: 26704556 PMCID: PMC4690837 DOI: 10.1007/s10856-015-5653-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 12/16/2015] [Indexed: 06/05/2023]
Abstract
Porous bioactive glasses are attractive for use as bone scaffolds. There is increasing interest in strontium containing bone grafts, since strontium ions are known to up-regulate osteoblasts and down regulate osteoclasts. This paper investigates the influence of partial to full substitution of strontium for calcium on the dissolution and phase formation of a multicomponent high phosphate content bioactive glass. The glasses were synthesised by a high temperature melt quench route and ground to a powder of <38 microns. The dissolution of this powder and its ability to form apatite like phases after immersion in Tris buffer (pH 7.4) and simulated body fluid (SBF) was followed by inductively coupled plasma optical emission spectroscopy (ICP), Fourier transform infra red spectroscopy (FTIR), X-ray powder diffraction (XRD) and (31)P solid state nuclear magnetic resonance spectroscopy up to 42 days of immersion. ICP indicated that all three glasses dissolved at approximately the same rate. The all calcium (SP-0Sr-35Ca) glass showed evidence of apatite like phase formation in both Tris buffer and SBF, as demonstrated after 3 days by FTIR and XRD analysis of the precipitate that formed during the acellular dissolution bioactivity studies. The strontium substituted SP-17Sr-17Ca glass showed no clear evidence of apatite like phase formation in Tris, but evidence of an apatite like phase was observed after 7 days incubation in SBF. The SP-35Sr-0Ca glass formed a new crystalline phase termed "X Phase" in Tris buffer which FTIR indicated was a form of crystalline orthophosphate. The SP-35Sr-0Ca glass appeared to support apatite like phase formation in SBF by 28 days incubation. The results indicate that strontium substitution for calcium in high phosphate content bioactive glasses can retard apatite like phase formation. It is proposed that apatite formation with high phosphate bioactive glasses occurs via an octacalcium phosphate (OCP) precursor phase that subsequently transforms to apatite. The equivalent octa-strontium phosphate does not exist and consequently in the absence of calcium, apatite formation does not occur. The amount of strontium that can be substituted for calcium in OCP probably determines the amount of strontium in the final apatite phase and the speed with which it forms.
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Affiliation(s)
- Danujan Sriranganathan
- School of Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London, E1 2AD, UK.
| | - Nasima Kanwal
- Dental Physical Sciences, Dental Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Karin A Hing
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Robert G Hill
- Dental Physical Sciences, Dental Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
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77
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Song R, Liang J, Lin L, Zhang Y, Yang Y, Lin C. A facile construction of gradient micro-patterned OCP coatings on medical titanium for high throughput evaluation of biocompatibility. J Mater Chem B 2016; 4:4017-4024. [DOI: 10.1039/c6tb00458j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A facile construction of gradient micro-patterned octacalcium phosphate (OCP) coatings on titanium was developed for high-throughput screening of biocompatibility and bioactivity.
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Affiliation(s)
- Ran Song
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Jianhe Liang
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Longxiang Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Yanmei Zhang
- Beijing Medical Implant Engineering Research Center
- Beijing 100082
- China
- Beijing Engineering Laboratory of Functional Medical Materials and Devices
- Beijing 100082
| | - Yun Yang
- Beijing Medical Implant Engineering Research Center
- Beijing 100082
- China
- Beijing Engineering Laboratory of Functional Medical Materials and Devices
- Beijing 100082
| | - Changjian Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
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78
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Li B, Han Y. Fast formation of a novel bilayer coating with enhanced corrosion resistance and cytocompatibility on magnesium. RSC Adv 2015. [DOI: 10.1039/c5ra04454e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A bilayer coating on magnesium provides effective protection to the substrate from corrosion and facilitates osteoblast adhesion and proliferation.
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Affiliation(s)
- Bo Li
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials
- Xi'an Jiaotong University
- Xi'an 710049
- China
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79
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Kastellorizios M, Tipnis N, Burgess DJ. Foreign Body Reaction to Subcutaneous Implants. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 865:93-108. [DOI: 10.1007/978-3-319-18603-0_6] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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