60046
RECORDING - Enhancement of Antibacterial Activity in NiTi based Shape Memory Alloy Produced by Additive Manufacturing
Friday, May 10, 2024: 1:45 PM
Meeting Room I (Hotel Cascais Miragem)
Dr. Carlo Alberto Biffi
,
National Research Council of Italy - CNR ICMATE, Lecco, LC, Italy, National Research Council of Italy, Lecco, Italy
Dr. Jacopo Fiocchi
,
National Research Council of Italy - CNR ICMATE, Lecco, Italy
Dr. Chiara Bregoli
,
CNR ICMATE, Lecco, LC, Italy
Mr. Alberto Coda
,
SAES Getters S.p.A, Lainate, Mi, Italy
Dr. Jannis Lemke
,
CNR-ICMATE, Lecco, LC, Italy
Dr. Francesca Sisto
,
University of Milan, Milano, Mi, Italy
Dr. Ausonio Tuissi
,
National Research Council of Italy - CNR ICMATE, Lecco, LC, Italy
Superelastic NiTi (Nitinol) alloy is a consolidate smart material adopted for realizing devices applicable in the biomedical sector, like stents, implants and orthodontic wires. Anyways, after surgery the proliferation of bacteria remains an important task to be satisfied for their success. Under this light, the integration between its pseudoelasticity and an improved antibacterial response can be considered as a relevant challenge for realizing advanced implantable devices.
In this work the combination between NiTi and an element having antibacterial properties, like Zn, was investigated. In particular, Zn was added into NiTi with the aim of producing full dense parts by Laser Powder Bed Fusion (LPBF).
After the LPBF feasibility study, the NiTiZn alloy was characterized in terms of composition, transformation temperatures, pseudoelastic response, corrision and antibacterial behaviour. It was found that the addition of limited amount of Zn can promote a significant increase of the antibacterial action with respect to the binary NiTi, leaving almost unvaried the functional performances of the material. This work opens new options for the design of advanced implantable devises with enhanced antibacterial properties.
