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Advanced Alloy Degradation and Implants, 2nd Edition
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Advanced Alloy Degradation and Implants, 2nd Edition

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Coatings for Biomedicine and Bioengineering".

Deadline for manuscript submissions: 10 February 2025 | Viewed by 3510

Special Issue Editors

Prof. Dr. Jing'an Li

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
Interests: biomaterials; biomedical magnesium alloy; metallic implants; surface modification for biomaterials
Special Issues, Collections and Topics in MDPI journals
Dr. Zhe Fang

E-Mail Website
Guest Editor
School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
Interests: biomaterials; biomaterials magnesium alloy; metallic implants; surface modification for biomaterials; first-principles calculation; molecular dynamics simulation

Special Issue Information

Dear Colleagues,

Metals and their alloys are some of the oldest biomedical materials in human history and continue to play an irreplaceable role in modern clinical treatment due to their excellent mechanical load-bearing properties, chemical stability, and biocompatibility. In recent years, the R&D and design of metal implants and devices; the further exploration of their powerful functions; and the in-depth exploration of their interaction with the body’s microenvironment have progressed significantly. In particular, the design of biodegradable alloys; the elaboration of their degradation mechanisms in different environments; research on their degradation behavior and degradation products; and the prospect of their advanced exclusive coating have attracted the attention of scholars.

Previously, we published the Special Issue “https://www.mdpi.com/journal/coatings/special_issues/Degradation_Implants” online. This Special Issue has now closed and achieved great success. Building on this collaboration, we are keen to launch a second volume of the existing Special Issue, “Advanced Alloy Degradation and Implants, 2nd Edition”, the aim of which is to publish full-length research articles, short communications, and review articles covering the latest studies, progress, and challenges in the design, fabrication, degradation, and surface modification of metal alloy implants for their future biomedical applications.

Topics addressed in this Special Issue may include, but are not limited to, the following:

  1. The design, fabrication, and characterization of new alloy implants and devices;
  2. Coatings of metallic implants or biomaterials;
  3. Biomedical alloy degradation;
  4. Computational modeling and numerical simulation of alloy implants and their surfaces;
  5. Composite materials composed of metals and other materials;
  6. The interactions between alloy implants and cells.

Prof. Dr. Jing'an Li
Dr. Zhe Fang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biomaterials
  • alloys
  • coatings
  • degradation
  • surface
  • interface
  • biocompatibility

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Published Papers (4 papers)

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Research

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14 pages, 3687 KiB  
Article
Construction of a Carbon Monoxide-Releasing Bioactive Hydrogel Coating on the Magnesium Alloy Surface for Better Corrosion Resistance, Anticoagulant Properties, and Endothelial Cell Growth
by Renwei Gao, Lingjie Meng and Changjiang Pan
Coatings 2024, 14(11), 1418; https://doi.org/10.3390/coatings14111418 - 8 Nov 2024
Viewed by 534
Abstract
In this study, we first fabricated a crosslinked hydrogel coating by polymerizing methacryloyloxyethyl sulfonyl betaine and acrylamide (SBMA) on the magnesium (Mg) alloy surface employing ultraviolet (UV) polymerization. Bivalirudin and CO-releasing molecules (CORM-401) were further grafted onto the hydrogel coating surface to acquire [...] Read more.
In this study, we first fabricated a crosslinked hydrogel coating by polymerizing methacryloyloxyethyl sulfonyl betaine and acrylamide (SBMA) on the magnesium (Mg) alloy surface employing ultraviolet (UV) polymerization. Bivalirudin and CO-releasing molecules (CORM-401) were further grafted onto the hydrogel coating surface to acquire a multifunctional biocompatible coating capable of releasing CO to augment corrosion-resisting properties and biocompatibility. The findings verified that the bioactive hydrogel coating significantly increased the corrosion potential and reduced the corrosion current, thereby improving the anticorrosion performance. Meanwhile, owing to the excellent hydrophilicity, the antifouling performance of the hydrogel coating, and the excellent anticoagulant performance of bivalirudin, the hydrogel coating significantly reduced the fibrinogen adsorption, platelet adhesion and activation, and hemolysis occurrence, displaying excellent ability to inhibit blood clotting. Moreover, endothelial cell (EC) experimental results demonstrated that the hydrogel coating could significantly promote EC growth, displaying great potential to induce re-endothelialization after implantation. Specifically, in the presence of cysteine capable of catalyzing CO release, the anticoagulant performance and ability to promote EC growth were further improved significantly. Therefore, the study offers an effective strategy to prepare a hydrogel coating capable of releasing CO to improve the corrosion-resisting performance and biocompatibility of Mg alloys, which is anticipated to be applied in the surface modification of Mg alloy intravascular stents. Full article
(This article belongs to the Special Issue Advanced Alloy Degradation and Implants, 2nd Edition)
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15 pages, 20333 KiB  
Article
Elastoplastic and Electrochemical Characterization of xTiB2 Strengthened Ti Porous Composites for Their Potential Biomedical Applications
by David Israel Bravo-Bárcenas, Reynier Suárez-Martínez, Jonatan Pérez-Alvarez, Omar Jiménez-Alemán, Iván Gerardo Farias-Velazquez, Marco Aurelio Gonzaléz-Albarrán and Jorge Chávez
Coatings 2024, 14(8), 991; https://doi.org/10.3390/coatings14080991 - 6 Aug 2024
Viewed by 834
Abstract
The microstructure, elastoplastic properties, and corrosive response of induced porous Ti-TiH2 materials reinforced with TiB2 particles were investigated. Samples were fabricated using CP-Ti Grade1, Titanium Hydride (TiH2), TiB2 powders (0, 3, 10, and 30 vol.%), and ammonium bicarbonate [...] Read more.
The microstructure, elastoplastic properties, and corrosive response of induced porous Ti-TiH2 materials reinforced with TiB2 particles were investigated. Samples were fabricated using CP-Ti Grade1, Titanium Hydride (TiH2), TiB2 powders (0, 3, 10, and 30 vol.%), and ammonium bicarbonate salt (40 vol.%) as a space holder. Composites were fabricated using the Powder Metallurgy technique under high-vacuum conditions (HVS) at 1100 °C. Scanning electron microscopy, X-ray diffraction, nanoindentation tests, and electrochemical assays were used to investigate the pore formation, pore distribution, phase formation, elastoplastic properties, and electrochemical behavior of the compounds, respectively. With a mean pore diameter of 50–900 µm and Young’s modulus of less than 100 GPa, which is close to the properties of human bone, the pore structures of the compounds processed here are shown to be a potential biomaterial for osseointegration. In addition, their H/Er and H3/Er2 ratios for the reinforced samples are higher than those of the unreinforced sample (1.5 and 4 times higher than the unreinforced sample, respectively), suggesting a better wear resistance of the Ti-TiH2/xTiB2 composites. Electrochemical experiments demonstrated that the Ti-TiH2/xTiB2 composites exhibited superior passivation properties compared to the Ti-TiH2 sample. Additionally, the corrosion rates exhibited by the 3 and 10 vol.% of TiB2 samples were found to be within an acceptable range for potential biomedical applications (29.26 and 185.82 E-3 mm·y−1). The elastoplastic properties combined with the electrochemical behavior place the Ti-TiH2/3-10TiB2 composites as potential candidates for the biomedical application of CP-Ti. Full article
(This article belongs to the Special Issue Advanced Alloy Degradation and Implants, 2nd Edition)
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9 pages, 717 KiB  
Article
Activity of Fluoride Varnishes Containing Micrometric or Nanosized Sodium Trimetaphosphate against Early Enamel Erosive Lesions In Vitro
by Liliana Carolina Báez-Quintero, Juliano Pelim Pessan, Mariana Emi Nagata, Luigi Pedrini Guisso, Alberto Carlos Botazzo Delbem, Daniela Rios, Caio Sampaio and Thayse Yumi Hosida
Coatings 2024, 14(7), 855; https://doi.org/10.3390/coatings14070855 - 8 Jul 2024
Viewed by 880
Abstract
This study aimed to assess the effects of fluoridated varnishes supplemented with micrometric or nanosized sodium trimetaphosphate (TMPmicro or TMPnano, respectively) against enamel softening in an early erosive model in vitro. Bovine enamel blocks (with mean surface hardness [SH] between 330.0 and [...] Read more.
This study aimed to assess the effects of fluoridated varnishes supplemented with micrometric or nanosized sodium trimetaphosphate (TMPmicro or TMPnano, respectively) against enamel softening in an early erosive model in vitro. Bovine enamel blocks (with mean surface hardness [SH] between 330.0 and 380.0 kgf/mm2) were selected and randomly assigned according to their SH (n = 8) into the following groups: Placebo (no fluoride/TMP; negative control), 5% NaF (positive control), 5% NaF + 5%TMPmicro, 5% NaF + 2.5%TMPnano and 5% NaF + 5%TMPnano. Blocks received a single application of the varnishes and were immersed in artificial saliva (6 h). Thereafter, the varnishes were removed and the blocks were subjected to four individual erosive challenges (1 min, citric acid, 0.75%, pH = 3.5, under agitation); SH was determined after each challenge. Data were subjected to ANOVA and Student–Newman–Keuls’ test (p < 0.05). Overall, the highest %SH loss was observed for the Placebo, followed by 5% NaF, 5% NaF + 5% TMPmicro, and both varnishes containing TMPnano, without significant differences between 2.5% and 5% TMPnano. It was concluded that TMP enhanced the effects of a 5% NaF varnish against enamel softening in an early erosive model in vitro, with an additional benefit from the use of nanoparticles over microparticles. Full article
(This article belongs to the Special Issue Advanced Alloy Degradation and Implants, 2nd Edition)
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Review

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29 pages, 4458 KiB  
Review
The Preparation of Biomass-Derived Carbon Dots and Its Application Prospect in the Field of Vascular Stent Coating
by Huimin Duan, Yanchao Wang, Zhongna Zhang, Ambreen Akram, Lan Chen and Jingan Li
Coatings 2024, 14(11), 1432; https://doi.org/10.3390/coatings14111432 - 11 Nov 2024
Viewed by 566
Abstract
Biomass material serves as one of the most advantageous carbon sources for the synthesis of carbon dots (CDs) due to its abundant availability, cost-effectiveness, and environmental sustainability. Biomass-derived carbon dots (B-CDs), which are new zero-dimensional carbon nanomaterials, have presented broad application prospects in [...] Read more.
Biomass material serves as one of the most advantageous carbon sources for the synthesis of carbon dots (CDs) due to its abundant availability, cost-effectiveness, and environmental sustainability. Biomass-derived carbon dots (B-CDs), which are new zero-dimensional carbon nanomaterials, have presented broad application prospects in the medical field and have become a research focus. In recent years, the death rate caused by vascular diseases has been high, and interventional therapy is one of the important means to treat vascular stenosis. As a material with excellent biocompatibility and fluorescence properties, B-CDs have shown great potential in the field of vascular stents, and their unique properties provide new ideas and possibilities for improving the biocompatibility of vascular stents and realizing real-time tracer diagnosis. This paper reviews the preparation methods, modification techniques, and application prospects of B-CDs in the coating of vascular stents. It discusses current challenges and potential solutions while forecasting future development directions, thereby providing innovative insights and pathways for the research and development of a new generation of vascular stents. Full article
(This article belongs to the Special Issue Advanced Alloy Degradation and Implants, 2nd Edition)
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