Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Poster: Nanostructures at Surfaces
O 66.6: Poster
Mittwoch, 20. März 2024, 18:00–20:00, Poster C
Design of femtosecond nanostructured stainless steel orthopedic implants, magnetron sputtered with Cu and optimized for calcium phosphates crystals growth for application in orthopedics — •Liliya Angelova1, Albena Daskalova1, Maja Sikiric2, and Tihomir Car2 — 1Institute of Electronics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria — 2Ruder Bošković Institute, 10 000 Zagreb, Croatia
Nowadays, the engineering of load-bearing bone tissue after severe trauma still relies on metal-based permanent implants. Such artificial tissues are usually applied in the body and come into direct contact with the recipient's cells, whose adhesion directly affects the acceptance or rejection of the implant by the patient. The present study aims to create nano rough texture employing ultra-short femtosecond laser (fs)-induced periodicity in the form of LIPSS on the surface of a mechanically stable stainless steel implant model, that is additionally functionalized by magnetron sputtered Cu thin layer, giving the as created implants stable antimicrobial surface interface. Calcium phosphate (CaP) crystal growth was additionally performed due to the well-known high mechanical stability and load-bearing properties that CaPs give to the bone connective tissue, as well as for the strong interface bond that they make between the artificial implant and the surrounding bone tissue, stabilizing in that way the implanted structure in the body. The optimization of the bioactive properties of the as-created antimicrobial hybrid topographical design has the potential for subsequent practical application in bone tissue engineering.
Keywords: ultra-short laser processing; LIPSS; nanostructuring; antimicrobial properties; hierarchical surface texture