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Updated: Jun 29, 2026
09:56
Fabrication of Mechanically Tunable and Bioactive Metal Scaffolds for Biomedical Applications
Published on: December 8, 2015
Metallic biomaterials
1Department of Biomaterials Science, Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan. niinomi@imr.tohoku.ac.jp
Summary
New titanium (Ti) alloys are being developed as biocompatible alternatives to traditional materials. These advanced Ti alloys offer shape memory effects and improved bone integration for medical implants.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Orthopedic Technology
Background:
- Traditional metallic implants (Ni-free stainless steels, Co-Cr alloys) face biocompatibility challenges.
- Titanium (Ti) alloys are explored for their non-toxic, allergy-free properties.
- Ni-free Ti alloys with superelasticity and shape memory effects are under development.
Purpose of the Study:
- To review the development of novel, biocompatible metallic materials for medical applications.
- To highlight the potential of beta-type Ti alloys for orthopedic and dental uses.
- To discuss surface modification techniques for enhanced bioactivity and hemocompatibility.
Main Methods:
- Development of Ni-free Ti alloys with specific compositions (e.g., Ti-29Nb-13Ta-4.6Zr).
- Application of surface modification techniques: alkali treatment and calcium phosphate glass-ceramic dip-coating.
- Surface functionalization using blood-compatible polymers (poly(ethylene glycol)) via electrodeposition.
Main Results:
- Beta-type Ti alloys demonstrate a low elastic modulus, beneficial for bone remodeling.
- Surface modifications enhance the bioactivity of Ti alloys.
- Electrodeposition successfully fixes blood-compatible polymers onto Ti surfaces.
- Novel Ti alloys are being developed for dental applications.
Conclusions:
- Advanced Ti alloys offer promising biocompatible and functional alternatives for medical implants.
- Surface engineering is crucial for optimizing the performance of Ti-based biomaterials.
- Ongoing research focuses on enhancing the properties and applications of Ti alloys in medicine.
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