| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Biomaterials for Bioink Formulation and 3D Printing of Scaffolds
|
| Presentation Title |
Additively manufactured biodegradable ZnMg alloy for cortical-bone mimicking load-bearing applications |
| Author(s) |
Yageng Li |
| On-Site Speaker (Planned) |
Yageng Li |
| Abstract Scope |
While additively manufactured (AM) zinc (Zn) alloy porous scaffolds mimicking the mechanical properties of trabecular bone have been previously reported, mimicking the mechanical properties of cortical bone remains a formidable challenge. Here, we develop AM Zn-Mg alloy to overcome this challenge. We used laser powder bed fusion to process Zn-Mg. The compressive properties of the solid Zn-Mg specimens greatly exceeded their tensile properties, with a compressive yield strength of up to 601 MPa and an ultimate strain of >60%. We then designed and fabricated functionally graded porous structures with a solid core and achieved cortical bone-mimicking mechanical properties, including a compressive yield strength of >120 MPa and an elastic modulus of ≈20 GPa. The Zn-Mg specimens also exhibited improved biocompatibility as compared to pure Zn. These results mark major progress in the development of AM porous biodegradable metallic bone substitutes for the treatment of load-bearing bone defects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Biomaterials, |