Recent Advances in Metallic Biomaterials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Biobased and Biodegradable Metals".

Deadline for manuscript submissions: 10 January 2025 | Viewed by 3405

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering and Materials, Universitat Politècnica de València, Valencia, Spain
Interests: titanium alloys; powder metallurgy; biomaterials; tribocorrosion; surface modification; additive manufacturing
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Guest Editor
Department of Materials Engineering, Universidade Federal de São Carlos, São Carlos, Brazil
Interests: titanium alloys; powder metallurgy; biomaterials; porous materials, coatings; additive manufacturing

Special Issue Information

Dear Colleagues,

The increase in life expectancy in the world population increasingly requires structural alloys that allow bone replacement or repair and likewise improve dental implantology. For this reason, the study and development of new and better alloys is essential, as well as the corresponding surface modification that allows better osseointegration. At the same time, studies of surface functionalization that allow better bioactivity will minimize the costs associated with possible revisions of prostheses and implants. In addition, the additive manufacturing of personalized prostheses, especially in maxillofacial surgery, can allow an improvement in the well-being of the patient, opening up new possibilities of therapeutic application.

The improvement in the integral behaviour of biodegradable alloys or compounds between alloys will allow combining their properties in the medium and long term, improving the duration and properties of the devices.

In this Special Issue, we welcome articles that focus on the development of new alloys, as well as their surface modification through the generation of specific textures or improved metallic and ceramic coatings. The study and characterization of its mechanical properties, related to its microstructure, its resistance to corrosion and, above all, its biocompatibility.

Prof. Dr. Vicente Amigó-Borrás
Dr. Mariana Correa Rossi
Guest Editors

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Keywords

  • titanium alloys
  • magnesium alloys
  • surface modification
  • surface functionalization
  • biocompatibility
  • corrosion behaviour
  • structural characterization
  • processing
  • biomedical metal composites

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Published Papers (2 papers)

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Research

13 pages, 4573 KiB  
Article
Influence of CAD/CAM Manufacturing Technique and Implant Abutment Angulation on Loosening of Individual Screw-Retained Implant Crowns
by Aitana Rico-Coderch, Luis F. Félix, María Fernanda Solá-Ruiz, Michell Medina, Rubén Agustín-Panadero, Rocío Ortega, Rocío Cascos and Miguel Gómez-Polo
Metals 2024, 14(7), 816; https://doi.org/10.3390/met14070816 - 15 Jul 2024
Viewed by 1073
Abstract
Background: Dental implant abutment screw loosening is an increasingly common problem, as evidenced by multiple studies that have investigated its causes. The objective of this study was to compare the screw loosening torque values before and after cyclic loading and to determine whether [...] Read more.
Background: Dental implant abutment screw loosening is an increasingly common problem, as evidenced by multiple studies that have investigated its causes. The objective of this study was to compare the screw loosening torque values before and after cyclic loading and to determine whether they are affected by the CAD/CAM abutment manufacturing technique (machined or laser-sintered) and abutment angulation. Materials and Methods: Ninety implants were used and divided into two groups: 45 implants received machined abutments (group A) and 45 implants received laser-sintered abutments (group B). Each group was further divided into three subgroups, with 15 implants each, based on the abutment angulation involved (0°, 15° and 20°). The abutments were tightened to the torque recommended by the manufacturer, and the reverse torque value was measured before and after cyclic loading (300,000 cycles). Data analysis was performed using one-way ANOVA and Wilcoxon signed-rank tests. Results: Statistically significant differences were observed between the laser-sintered and machined groups (p < 0.01). Additionally, differences were observed between subgroups with different angulations for both machined (16.2 ± 1.75, 14.7 ± 1.74 and 13.4 ± 1.08 Ncm) and laser-sintered abutments (14.6 ± 1.25, 12.7 ± 1.2 and 11.1 ± 1.35 Ncm) (0°, 15° and 20°, respectively). Conclusions: The final screw loosening torque after cyclic loading was lower than the initial loosening torque. Both abutment angulation and the CAD/CAM manufacturing method exerted a statistically significant influence on the final loosening torque. The abutment angulation factor was estimated to have an influence of 34.5%, while the abutment manufacturing method was estimated to have an influence of 21%. Full article
(This article belongs to the Special Issue Recent Advances in Metallic Biomaterials)
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16 pages, 23806 KiB  
Article
Improved Tribological Performance of Nitride-Reinforced Biocompatible Titanium–Niobium–Zirconium–Tantalum (TNZT) Alloys for Advanced Orthopedic Applications
by Satyavan Digole, Jay Desai, Calvin Christopher, Smriti Bohara, Chathuranga Sandamal Witharamage, Chandra Kothapalli, Rajeev Kumar Gupta and Tushar Borkar
Metals 2024, 14(1), 122; https://doi.org/10.3390/met14010122 - 20 Jan 2024
Cited by 1 | Viewed by 1830
Abstract
β-titanium (β-Ti) alloys are used in various biomedical applications, especially for orthopedic implants, due to their superior biocompatibility, excellent corrosion resistance, and enhanced mechanical properties. However, the inferior tribological properties of β-Ti alloys lead to fretting wear and a strong tendency to seize, [...] Read more.
β-titanium (β-Ti) alloys are used in various biomedical applications, especially for orthopedic implants, due to their superior biocompatibility, excellent corrosion resistance, and enhanced mechanical properties. However, the inferior tribological properties of β-Ti alloys lead to fretting wear and a strong tendency to seize, which is a major concern in orthopedic applications involving continuous friction. This work aims to address this issue by incorporating biocompatible nitrides in Ti-Nb-Zr-Ta (TNZT) β-Ti alloys. TNZT composites comprising 2 wt.% of biocompatible nitrides (TiN, NbN, ZrN, and TaN) were prepared using high-energy ball milling followed by spark plasma sintering. All the nitrides improved the hardness and wear resistance of TNZT alloys and showed excellent biocompatibility. TNZT-2 wt.% TiN showed the average highest hardness of 311.8 HV and the lowest coefficient of friction of 0.659, suggesting the highest efficiency of TiN in improving the tribological performance of TNZT alloys. The underlying mechanisms behind the superior performance of nitride-reinforced TNZT composites are discussed in detail. The effect of TiN concentration was also studied by preparing TNZT composites with 5 and 10 wt.% TiN, which showcased a higher hardness of 388.5 HV and 444.3 HV, respectively. This work will aid in producing superior β-Ti alloys for advanced orthopedic applications. Full article
(This article belongs to the Special Issue Recent Advances in Metallic Biomaterials)
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