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Ben-David M, Carmeli I, Orgad R, Nathansohn-Levi B, Yered T, Shor E, Wasserberg N. Implantation of an Impedance Sensor for Early Detection of Gastrointestinal Anastomotic Leaks. J Surg Res 2022; 278:49-56. [PMID: 35594614 DOI: 10.1016/j.jss.2022.04.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Accurate early diagnosis of a gastrointestinal anastomotic leak remains a challenge. When an anastomotic leak develops, the electrical properties of the tissue undergoing inflammatory processes change, resulting from the extravasation of inflammatory fluid and cellular infiltration. The method described here intends to provide a novel early anastomotic leak warning system based upon measurable changes in tissue impedance nearby an acute inflammatory process. METHODS A biodegradable Mg-alloy was compared with a nonabsorbable stainless steel (STS) electrode connected to a wireless recording system for impedance measurement. In vitro measurements were made in physiological solutions and small animal (eight mice) and large animal (eight pigs) models with an anastomotic leak simulated by an open colotomy. Measurements were made at 10 mm intervals from the open colon at baseline and up to 120 min comparing these with a sutured colonic wound and normal tissue. RESULTS In-vitro biodegradable magnesium electrode impedance evaluation showed good sensitivity to different media due to its environmental corrosion properties. The impedance of an acidic environment (1.06 ± 0.02 kΩ for citric acid) was twice that of phosphate-buffered saline (PBS) (0.64 ± 0.008 kΩ) with a distinction between Normal Saline (0.42 ± 0.013 kΩ) and PBS (0.64 ± 0.008 kΩ). This was in contrast to the performance characteristics of the control STS electrodes, where impedance in an acidic environment was lower than saline or PBS (citric acid:0.76 ± 0.01 kΩ versus PBS: 1.32 ± 0.014 kΩ). In a mouse model simulating an anastomotic leak, there was a significant increase in impedance after 120 min when compared with controls (99.7% increase versus 9.6% increase, respectively; P < 0.02). This effect was confirmed in a pig model when relative impedance measurements of the leak and control groups were compared (1.86 ± 0.46 versus 1.07 ± 0.02, respectively; P < 0.027). CONCLUSIONS Electrophysiological measurement shows diagnostic sensitivity for a gastrointestinal leak with potential clinical utility in the postoperative detection of early intra-abdominal sepsis. Further investigation of biodegradable tissue sensors capable of monitoring an early anastomotic leak is required.
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Affiliation(s)
- Matan Ben-David
- Upper GI Surgery, Royal Prince Alfred Hospital, University of Sydney, Australia.
| | - Idan Carmeli
- General Surgery, Assuta Ashdod Public Hospital, Ashdod, Israel
| | - Ran Orgad
- Department of Surgery, Rabin Medical Center, Petach Tiqva, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Tal Yered
- Exero Medical LTD, Or Yehuda, Israel
| | - Erez Shor
- Exero Medical LTD, Or Yehuda, Israel
| | - Nir Wasserberg
- Department of Surgery, Rabin Medical Center, Petach Tiqva, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
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Zhang Y, Zimmermann T, Mueller WD, Witte F, Beuer F, Schwitalla A. Exploring the degradation behavior of MgXAg alloys by in vitro electrochemical methods. Bioact Mater 2021; 7:441-452. [PMID: 34466744 PMCID: PMC8379447 DOI: 10.1016/j.bioactmat.2021.05.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 05/03/2021] [Accepted: 05/26/2021] [Indexed: 11/30/2022] Open
Abstract
Magnesium as biodegradable biomaterial could serve as bone augmentation material in implant dentistry. The knowledge about the predictability of the biodegradation process is essential as this process needs to go hand in hand with the formation of new bone to gradually replace the augmentation material. Therefore, this work aimed to assess if the electrochemistry (EC) measurements of the corrosion process correlate with the surface features at various time points during the surface degradation, in order to describe the degradation process of Mg and Mg alloys more reliably, under the assumption that differences in EC behavior can be detected and related to specific patterns on the surface. In this test setup, a special optical chamber was used for electrochemical measurements on Mg and Mg-alloys (Mg2Ag, Mg4Ag, and Mg6Ag). Specimens were investigated using different circulating cell culture solutions as electrolytes, these were minimum essential medium (MEM), Hank's Balanced Salt Solution (HBSS), and MEM+ (MEM with added sodium hydrogen carbonate) at 37 °C. Open circuit potential measurements (OCP) over 30 min followed by cyclic polarization were performed. The electrochemistry data, including OCP, exchange current density and corrosion potential, were compared with visible changes at the surface during these treatments over time. The results show that the addition of silver (Ag) leads to a “standardization” of the degradation regardless of the selected test medium. It is currently difficult to correlate the visible microscopic changes with the data taken from the measurements. Therefore, further investigations are necessary. MgXAg alloys were investigated electrochemically in MEM, HBSS and MEM+ at 37℃ in circulated electrolyte. A correlation between optical appearance and electrochemical data was performed. Visible high activity on the surface corresponded with high electrochemical activity.
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Affiliation(s)
- Yuqiuhan Zhang
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Tycho Zimmermann
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Wolf-Dieter Mueller
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Frank Witte
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Florian Beuer
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
| | - Andreas Schwitalla
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197, Berlin, Germany
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Prithivirajan S, Nyahale MB, Naik GM, Narendranath S, Prabhu A, Rekha PD. Bio-corrosion impacts on mechanical integrity of ZM21 Mg for orthopaedic implant application processed by equal channel angular pressing. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:65. [PMID: 34117928 PMCID: PMC8197699 DOI: 10.1007/s10856-021-06535-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 05/28/2021] [Indexed: 06/12/2023]
Abstract
The mechanical integrity of rolled ZM21 Mg was improved by equal channel angular pressing (ECAP) to function as a potential biodegradable bone screw implant. Electron backscattered diffraction (EBSD) revealed deformed grains of 45 µm observed in rolled ZM21 Mg. They were transformed to equiaxed fine grains of 5.4 µm after 4th pass ECAP. The yield strength of rolled and ECAPed ZM21 Mg alloys were comparable. In contrast, 4th pass ZM21 Mg exhibited relatively higher elongation when compared to rolled sample. The mechanical properties of rolled and ECAPed ZM21 Mg were dependant on both grain refinement and crystallographic texture. The rolled and 4th pass ECAPed tensile samples exhibited nonlinear deterioration of mechanical properties when tested after 7, 14, 21 and 28 days immersion in Hank's solution. The evaluation signifies that regardless their processing condition, ZM21 Mg alloys are suitable for surgical areas that requires high mechanical strength. In addition, the 4th pass ECAP samples were viable to MG-63 cells proving themselves to be promising candidates for future in vivo studies.
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Affiliation(s)
- S Prithivirajan
- Corrosion Engineering Lab, Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasanagar, Mangalore, Karnataka, India.
| | - Mayur Bapu Nyahale
- Corrosion Engineering Lab, Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasanagar, Mangalore, Karnataka, India
| | - Gajanan M Naik
- Department of Mechanical Engineering, Mangalore Institute of Technology and Engineering, Moodbidri, Mangalore, Karnataka, India
| | - S Narendranath
- Corrosion Engineering Lab, Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, Srinivasanagar, Mangalore, Karnataka, India
| | - Ashwini Prabhu
- Yenepoya Research Centre, Yenepoya Medical College, Yenepoya (Deemed to be University), Deralakatte, Mangalore, Karnataka, India
| | - P D Rekha
- Yenepoya Research Centre, Yenepoya Medical College, Yenepoya (Deemed to be University), Deralakatte, Mangalore, Karnataka, India
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In-Vitro Degradation of Hollow Silica Reinforced Magnesium Syntactic Foams in Different Simulated Body Fluids for Biomedical Applications. METALS 2020. [DOI: 10.3390/met10121583] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article reports the mechanical and biocorrosion behaviour of hollow silica nanosphere (SiO2) reinforced (0.5–2 vol.%) magnesium (Mg) syntactic foams. Room temperature tensile properties’ characterization suggests that the increased addition of hollow silica nanospheres resulted in a progressive increase in tensile yield strength (TYS) and ultimate tensile strength (UTS) with Mg-2 vol.% SiO2 exhibiting a maximum TYS of 167 MPa and a UTS of 217 MPa. The degradation behaviour of the developed Mg-SiO2 syntactic foams in four different simulated body fluids (SBFs): artificial blood plasma solution (ABPS), phosphate-buffered saline solution (PBS), artificial saliva solution (ASS) and Hanks’ balanced saline solution (HBSS) was investigated by using potentiodynamic polarization studies. Results indicate that corrosion resistance of the Mg-SiO2 syntactic foam decreases with increasing chloride ion concentration of the SBF. Mg-1.0 vol.% SiO2 displayed the best corrosion response and its corrosion susceptibility pertaining to corrosion rate and polarisation curves in different SBF solutions can be ranked in the following order: ABPS > PBS > HBSS > ASS. The surface microstructure demonstrated the presence of a better passivated layer on the syntactic foams compared to pure Mg. The observed increase in corrosion resistance is correlated with intrinsic changes in microstructure due to the presence of hollow silica nanospheres. Further, the effect of corrosive environment on the degradation behaviour of Mg has been elucidated.
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Peron M, Skaret PC, Fabrizi A, Varone A, Montanari R, Roven HJ, Ferro P, Berto F, Torgersen J. The effect of Equal Channel Angular Pressing on the stress corrosion cracking susceptibility of AZ31 alloy in simulated body fluid. J Mech Behav Biomed Mater 2020; 106:103724. [PMID: 32250950 DOI: 10.1016/j.jmbbm.2020.103724] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 03/09/2020] [Accepted: 03/15/2020] [Indexed: 11/18/2022]
Abstract
Despite the great potential of Mg and its alloys as material for biodegradable implants, their low resistance to the simultaneous action of corrosion and mechanical stresses in the human body have hampered their use. Stress Corrosion Cracking has been reported as one of the most critical failure modes to overcome to allow such materials to be clinically applied. Thus, in this paper we investigate the effect of Equal Channel Angular Pressing (ECAP) on the Stress Corrosion Cracking (SCC) susceptibility of the AZ31 Mg alloy. To do so, AZ31 alloy has been subjected to 1, 2 and 4 passes of ECAP, and the samples so obtained have then been tested by means Slow Strain Rate Tests (SSRTs) in Simulated Body Fluid (SBF) at 37 °C. Samples subjected to one pass of ECAP are shown to be less susceptible to SCC compared to the material in the as-received condition, while further ECAP processing (2 and 4 passes) are found to worsen the SCC susceptibility. To understand the different SCC susceptibilities shown by the differently ECAPed samples, microstructural analyses, potentiodynamic polarization curves, hydrogen evolution experiments and Scanning Electron Microscopy (SEM) analyses of the fracture surfaces were carried out. The improved corrosion resistance of the samples subjected to 1 pass of ECAP compared to the samples in the as received condition (due to a finer grain size) and to the samples subjected to 2 and 4 passes (due to a more favourable texture evolution) represents the reason of their reduced SCC susceptibility.
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Affiliation(s)
- Mirco Peron
- Department of Industrial and Mechanical Engineering, Norwegian University of Science and Technology, Richard Birkelands vei, 2b, 7034, Trondheim, Norway.
| | - Pål Christian Skaret
- Department of Materials Science and Engineering, Norwegian University of Science and Technology, Alfred Getz vei, 2, 7491, Trondheim, Norway
| | - Alberto Fabrizi
- Department of Management and Engineering, Padova University, Stradella San Nicola, 3, 36100, Vicenza, Italy
| | - Alessandra Varone
- Department of Industrial Engineering, University of Rome "Tor Vergata", Via del Politecnico, 1, 00133, Rome, Italy
| | - Roberto Montanari
- Department of Industrial Engineering, University of Rome "Tor Vergata", Via del Politecnico, 1, 00133, Rome, Italy
| | - Hans Jørgen Roven
- Department of Materials Science and Engineering, Norwegian University of Science and Technology, Alfred Getz vei, 2, 7491, Trondheim, Norway
| | - Paolo Ferro
- Department of Management and Engineering, Padova University, Stradella San Nicola, 3, 36100, Vicenza, Italy
| | - Filippo Berto
- Department of Industrial and Mechanical Engineering, Norwegian University of Science and Technology, Richard Birkelands vei, 2b, 7034, Trondheim, Norway
| | - Jan Torgersen
- Department of Industrial and Mechanical Engineering, Norwegian University of Science and Technology, Richard Birkelands vei, 2b, 7034, Trondheim, Norway
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Du B, Hu Z, Wang J, Sheng L, Zhao H, Zheng Y, Xi T. Effect of extrusion process on the mechanical and in vitro degradation performance of a biomedical Mg-Zn-Y-Nd alloy. Bioact Mater 2020; 5:219-227. [PMID: 32123775 PMCID: PMC7036737 DOI: 10.1016/j.bioactmat.2020.02.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 02/01/2020] [Accepted: 02/01/2020] [Indexed: 02/05/2023] Open
Abstract
A new type of biomedical Mg–Zn–Y-Nd alloy was developed and thermal extruded by different processes to investigate the effect of extrusion ratio and extrusion pass on its microstructure, mechanical property and degradation performance. The results show that the increase of extrusion ratio could promote the dynamic recrystallization (DRX) process and led to the coarsening of DRXed grains. While the increase of extrusion pass also contributes to the DRX process but refines the DRXed grains. The simultaneous increasing of extrusion ratio and extrusion pass refines the secondary phases obviously. The increase of extrusion ratio has reduced the tensile strength but improved the elongation of the alloy significantly. However, the increase of extrusion pass could enhance the tensile strength and elongation simultaneously, especially the strength. The degradation performance has been optimized effectively through increasing the extrusion ratio and extrusion pass. The microstructure of Mg–Zn–Y-Nd alloy thermal extruded by different extrusion ratio and pass was characterized. The tensile properties and deformation mechanisms of Mg–Zn–Y-Nd alloys were studied. The corrosion behavior of Mg–Zn–Y-Nd alloys were investigated.
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Affiliation(s)
- Beining Du
- Shenzhen Institute, Peking University, Shenzhen, 518057, China
| | - Ziyang Hu
- Shenzhen Yezhan Electronics Co., Ltd, Shenzhen, 518110, China
| | - Jiali Wang
- School of Biomedical Engineering, Sun Yat-sen University, Guangzhou, 510006, China
| | - Liyuan Sheng
- Shenzhen Institute, Peking University, Shenzhen, 518057, China
- Corresponding author.
| | - Hui Zhao
- School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China
| | - Yufeng Zheng
- Shenzhen Institute, Peking University, Shenzhen, 518057, China
| | - Tingfei Xi
- Shenzhen Institute, Peking University, Shenzhen, 518057, China
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7
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Antoniac I, Miculescu F, Cotrut C, Ficai A, Rau JV, Grosu E, Antoniac A, Tecu C, Cristescu I. Controlling the Degradation Rate of Biodegradable Mg-Zn-Mn Alloys for Orthopedic Applications by Electrophoretic Deposition of Hydroxyapatite Coating. MATERIALS 2020; 13:ma13020263. [PMID: 31936095 PMCID: PMC7013831 DOI: 10.3390/ma13020263] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 12/31/2019] [Accepted: 01/03/2020] [Indexed: 12/25/2022]
Abstract
Magnesium alloys as bioresorbable materials with good biocompatibility have raised a growing interest in the past years in temporary implant manufacturing, as they offer a steady resorption rate and optimal healing in the body. Magnesium exhibits tensile strength properties similar to those of natural bone, which determines its application in load-bearing mechanical medical devices. In this paper, we investigated the biodegradation rate of Mg-Zn-Mn biodegradable alloys (ZMX410 and ZM21) before and after coating them with hydroxyapatite (HAP) via the electrophoretic deposition method. The experimental samples were subjected to corrosion tests to observe the effect of HAP deposition on corrosion resistance and, implicitly, the rate of biodegradation of these in simulated environments. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) provided detailed information on the quality, structure, and morphology of the HAP coating. The obtained results demonstrate that coating of Mg-Zn-Mn alloys by HAP led to the improvement of corrosion resistance in simulated environments, and that the HAP coating could be used in order to control the biodegradation rate.
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Affiliation(s)
- Iulian Antoniac
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
| | - Florin Miculescu
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
| | - Cosmin Cotrut
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
| | - Anton Ficai
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 7 Gheorghe Polizu, District 1, 011061 Bucharest, Romania;
| | - Julietta V. Rau
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy;
| | - Elena Grosu
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
| | - Aurora Antoniac
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
- Correspondence: ; Tel.: +40-744-629-838
| | - Camelia Tecu
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest, 313 Splaiul Independentei, District 6, 060042 Bucharest, Romania; (I.A.); (F.M.); (C.C.); (E.G.); (C.T.)
| | - Ioan Cristescu
- Clinical Emergency Hospital Bucharest, Dept.Orthoped. & Traumatol, 8 Floreasca Ave, District 1, 014461 Bucharest, Romania;
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Paramitha D, Chabaud S, Bolduc S, Hermawan H. Biological Assessment of Zn-Based Absorbable Metals for Ureteral Stent Applications. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3325. [PMID: 31614757 PMCID: PMC6829415 DOI: 10.3390/ma12203325] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/01/2019] [Accepted: 10/09/2019] [Indexed: 01/02/2023]
Abstract
The use of ureteral stents to relieve urinary tract obstruction is still challenged by the problems of infection, encrustation, and compression, leading to the need for early removal procedures. Biodegradable ureteral stents, commonly made of polymers, have been proposed to overcome these problems. Recently, absorbable metals have been considered as potential materials offering both biodegradation and strength. This work proposed zinc-based absorbable metals by firstly evaluating their cytocompatibility toward normal primary human urothelial cells using 2D and 3D assays. In the 2D assay, the cells were exposed to different concentrations of metal extracts (i.e., 10 mg/mL of Zn-1Mg and 8.75 mg/mL of Zn-0.5Al) for up to 3 days and found that their cytoskeletal networks were affected but were recovered at day 3, as observed by immunofluorescence. In the 3D ureteral wall tissue construct, the cells formed a multilayered urothelium, as found in native tissue, with the presence of tight junctions at the superficial layer and laminin at the basal layer, indicating a healthy tissue condition even with the presence of the metal samples for up to 7 days of exposure. The basal cells attached to the metal surface as seen in a natural spreading state with pseudopodia and fusiform morphologies, indicating that the metals were non-toxic.
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Affiliation(s)
- Devi Paramitha
- Department of Mining, Metallurgical and Materials Engineering & CHU de Québec Research Center, Laval University, Quebec City, QC G1V 0A6, Canada.
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Division of Regenerative Medicine, CHU de Québec Research Center, Laval University, Quebec City, QC G1J 1Z4, Canada.
| | - Stéphane Chabaud
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Division of Regenerative Medicine, CHU de Québec Research Center, Laval University, Quebec City, QC G1J 1Z4, Canada.
| | - Stéphane Bolduc
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Division of Regenerative Medicine, CHU de Québec Research Center, Laval University, Quebec City, QC G1J 1Z4, Canada.
| | - Hendra Hermawan
- Department of Mining, Metallurgical and Materials Engineering & CHU de Québec Research Center, Laval University, Quebec City, QC G1V 0A6, Canada.
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Jung O, Porchetta D, Schroeder ML, Klein M, Wegner N, Walther F, Feyerabend F, Barbeck M, Kopp A. In Vivo Simulation of Magnesium Degradability Using a New Fluid Dynamic Bench Testing Approach. Int J Mol Sci 2019; 20:ijms20194859. [PMID: 31574947 PMCID: PMC6801401 DOI: 10.3390/ijms20194859] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 09/21/2019] [Accepted: 09/23/2019] [Indexed: 12/12/2022] Open
Abstract
The degradation rate of magnesium (Mg) alloys is a key parameter to develop Mg-based biomaterials and ensure in vivo-mechanical stability as well as to minimize hydrogen gas production, which otherwise can lead to adverse effects in clinical applications. However, in vitro and in vivo results of the same material often differ largely. In the present study, a dynamic test bench with several single bioreactor cells was constructed to measure the volume of hydrogen gas which evolves during magnesium degradation to indicate the degradation rate in vivo. Degradation medium comparable with human blood plasma was used to simulate body fluids. The media was pumped through the different bioreactor cells under a constant flow rate and 37 °C to simulate physiological conditions. A total of three different Mg groups were successively tested: Mg WE43, and two different WE43 plasma electrolytically oxidized (PEO) variants. The results were compared with other methods to detect magnesium degradation (pH, potentiodynamic polarization (PDP), cytocompatibility, SEM (scanning electron microscopy)). The non-ceramized specimens showed the highest degradation rates and vast standard deviations. In contrast, the two PEO samples demonstrated reduced degradation rates with diminished standard deviation. The pH values showed above-average constant levels between 7.4–7.7, likely due to the constant exchange of the fluids. SEM revealed severe cracks on the surface of WE43 after degradation, whereas the ceramized surfaces showed significantly decreased signs of corrosion. PDP results confirmed the improved corrosion resistance of both PEO samples. While WE43 showed slight toxicity in vitro, satisfactory cytocompatibility was achieved for the PEO test samples. In summary, the dynamic test bench constructed in this study enables reliable and simple measurement of Mg degradation to simulate the in vivo environment. Furthermore, PEO treatment of magnesium is a promising method to adjust magnesium degradation.
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Affiliation(s)
- Ole Jung
- Department of Oral Maxillofacial Surgery, University Medical Center, 20246 Hamburg-Eppendorf, Germany.
| | - Dario Porchetta
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany.
- Meotec GmbH, 52068 Aachen, Germany.
| | - Marie-Luise Schroeder
- Department of Oral Maxillofacial Surgery, University Medical Center, 20246 Hamburg-Eppendorf, Germany.
| | - Martin Klein
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany.
| | - Nils Wegner
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany.
| | - Frank Walther
- Department of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany.
| | - Frank Feyerabend
- Institute of Materials Research, Division Metallic Biomaterials, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany.
| | - Mike Barbeck
- Department of Oral Maxillofacial Surgery, University Medical Center, 20246 Hamburg-Eppendorf, Germany.
- BerlinAnalytix GmbH, 12109 Berlin, Germany.
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Mechanical and degradation property improvement in a biocompatible Mg-Ca-Sr alloy by thermomechanical processing. J Mech Behav Biomed Mater 2018; 80:285-292. [DOI: 10.1016/j.jmbbm.2018.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 11/07/2017] [Accepted: 02/01/2018] [Indexed: 01/10/2023]
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Sato A, Shimizu Y, Imai Y, Mukai T, Yamamoto A, Miura C, Muraki K, Sano Y, Ikeo N, Tachi M. Initial organ distribution and biological safety of Mg
2+
released from a Mg alloy implant. Biomed Mater 2018; 13:035006. [DOI: 10.1088/1748-605x/aaa9d5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Su Y, Su Y, Zai W, Li G, Wen C. In Vitro Degradation Behaviors of Manganese-Calcium Phosphate Coatings on an Mg-Ca-Zn Alloy. SCANNING 2018; 2018:6268579. [PMID: 29643970 PMCID: PMC5831605 DOI: 10.1155/2018/6268579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 10/08/2017] [Accepted: 10/31/2017] [Indexed: 05/18/2023]
Abstract
In order to decrease the degradation rate of magnesium (Mg) alloys for the potential orthopedic applications, manganese-calcium phosphate coatings were prepared on an Mg-Ca-Zn alloy in calcium phosphating solutions with different addition of Mn2+. Influence of Mn content on degradation behaviors of phosphate coatings in the simulated body fluid was investigated to obtain the optimum coating. With the increasing Mn addition, the corrosion resistance of the manganese-calcium phosphate coatings was gradually improved. The optimum coating prepared in solution containing 0.05 mol/L Mn2+ had a uniform and compact microstructure and was composed of MnHPO4·3H2O, CaHPO4·2H2O, and Ca3(PO4)2. The electrochemical corrosion test in simulated body fluid revealed that polarization resistance of the optimum coating is 36273 Ωcm2, which is about 11 times higher than that of phosphate coating without Mn addition. The optimum coating also showed the most stable surface structure and lowest hydrogen release in the immersion test in simulated body fluid.
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Affiliation(s)
- Yichang Su
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Yingchao Su
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Wei Zai
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Guangyu Li
- Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Cuie Wen
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
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Stability, biocompatibility and antioxidant activity of PEG-modified liposomes containing resveratrol. Int J Pharm 2017; 538:40-47. [PMID: 29294324 DOI: 10.1016/j.ijpharm.2017.12.047] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/27/2017] [Accepted: 12/29/2017] [Indexed: 11/23/2022]
Abstract
The present investigation reports the development of PEG-modified liposomes for the delivery of naturally occurring resveratrol. PEG-modified liposomes were prepared by direct sonication of the phospholipid aqueous dispersion, in the presence of two PEG-surfactants. Small, spherical, unilamellar vesicles were produced, as demonstrated by light scattering, cryo-TEM, and SAXS. The aging of the vesicles was assessed by using the Turbiscan® technology, and their physical stability was evaluated in vitro in simulated body fluids, results showing that the key features of the liposomes were preserved. The biocompatibility of the formulations was demonstrated in an ex vivo model of hemolysis in human erythrocytes. Further, the incorporation of resveratrol in PEG-modified liposomes did not affect its intrinsic antioxidant activity, as DPPH radical was almost completely inhibited, and the vesicles were also able to ensure an optimal protection against oxidative stress in an ex vivo human erythrocytes-based model. Therefore, the proposed PEG-modified liposomes, which were prepared by a simple and reliable method, represent an interesting approach to safely deliver resveratrol, ensuring the preservation of the carrier structural integrity in the biological fluids, and the antioxidant efficacy of the polyphenol to be exploited against oxidative stress associated with cancer.
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Fei J, Wen X, Lin X, Saijilafu, Wang W, Ren O, Chen X, Tan L, Yang K, Yang H, Yang L. Biocompatibility and neurotoxicity of magnesium alloys potentially used for neural repairs. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:1155-1163. [DOI: 10.1016/j.msec.2017.04.106] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Accepted: 04/18/2017] [Indexed: 01/21/2023]
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15
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Influence of SaOS-2 cells on corrosion behavior of cast Mg-2.0Zn0.98Mn magnesium alloy. Colloids Surf B Biointerfaces 2017; 150:288-296. [DOI: 10.1016/j.colsurfb.2016.10.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 10/19/2016] [Accepted: 10/24/2016] [Indexed: 11/21/2022]
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