| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biological Materials Science
|
| Presentation Title |
Mechanisms of Co-ion Release from Titanium-cobalt Hip Implants Revealed by Atomic Scale Correlative Microscopy |
| Author(s) |
Shanoob Balachandran Nair, Zita Zachariah, Alfons Fischer, David Mayweg, Markus Wimmer, Dierk Raabe, Michael Herbig |
| On-Site Speaker (Planned) |
Michael Herbig |
| Abstract Scope |
Millions of patients per year receive a hip implant as treatment for end-stage arthritis. These hip implants often consist of a cobalt alloy (Co-30Cr-5Mo) femoral head and a titanium alloy (Ti-6Al-4V) femoral stem. In-vivo fretting corrosion at the head-neck taper junction can lead to release of metal ions (specifically Co and Cr from the cobalt alloy) and metal wear particles, creating adverse local and systemic effects in the patient. Correlative transmission electron microscopy / atom probe tomography reveals the mechanism of nano-structural and atomic scale chemical alterations in the subsurface of titanium alloy subjected to in-vitro fretting under conditions similar to those occurring in-vivo in the hip. The fretting motion promotes tribocorrosion and hence Co-ion release from the more wear resistant cobalt alloy. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |