Conference Agenda

Keynote Lecture 3
Thursday, 22/Sept/2022:
4:10pm - 4:40pm

Session Chair: Andres Diaz Lantada
Location: Seminarroom AEU1-5

Karlsplatz 13, Staircase 2

4:10pm - 4:40pm

Additive manufacturing of advanced alloys for biodegradable and smart implants

J. Molina-Aldareguia1,2, L. Martín-Alonso2, F. Sket2, M. Li2, M. Echeverry-Rendón2, A. Kopp3, J. LLorca1,2

1Universidad Politécnica de Madrid, Spain; 2IMDEA Materials, Spain; 3Meotec GmbH & Co., Germany

Porous metallic scaffolds and devices manufactured by laser powder bed fusion (LPBF) are promising structures for tissue regeneration as they allow tissue ingrowth and permit body fluid transportation. The use of metals provides a substantial load-bearing capability, while the design envelop allowed by 3D printing technologies opens the possibility to design shape-morphing implants that can be implanted using less invasive procedures and that then undergo predesigned shape changes, leading to tissue expansion.

In this contribution, several design concepts will be shown using shape memory alloys and biodegradable metals that take advantage of 3D printing technologies. As an example, the potential use of porous Mg scaffolds manufactured by LPBF for bone regeneration will be addressed. Mg is a biodegradable metal and the mechanical properties are similar to those of bone, so it constitutes a perfect example of a metallic implant that can induce bone regeneration, while it is fully re-absorbed by the human body so the need for a second surgery for implant removal is prevented.

This application requires detailed knowledge of the degradation process and the load-bearing capability of the Mg scaffolds during degradation. This is particularly important in the case of scaffolds produced by additive manufacturing in which surface defects and porosity may lead to early failure of the implant. For this, in situ synchrotron X-ray microtomography studies of the degradation process of 3D printed Mg scaffolds are particularly valuable, as will be shown in this presentation.