Examinando por Autor "Sypniewska, Joanna"

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Hybrid laser-micro-arc oxidation techniques for enhanced biocompatibility and surface modification of Ti13Nb13Zr alloy in biomedical applications
(Elsevier, 2025-03-31) Sypniewska, Joanna; Szkodo, Marek; Majkowska-Marzec, Beata; Pawłowski, Łukasz; Mirowska, Aleksandra; Ryl, Jacek; Mielewczyk-Gryn, Aleksandra; Gaweł, Łukasz; Martínez-Campos, Enrique; Fernández-Hernán, Juan Pablo
The research conducted in this paper focuses on an innovative hybrid surface modification technique for Ti13Nb13Zr alloys, combining an Nd: YAG laser treatment process with a micro-arc oxidation (MAO) technique. The work aimed to increase biocompatibility and improve surface properties, crucial for biomedical applications. By introducing zinc and sodium ions into the ceramic films and manipulating the duration of the MAO process, significant improvements in surface morphology, corrosion resistance, and cytocompatibility were achieved. Surface topography analyses showed a dual modification effect, increasing roughness, isotropy, and wettability properties, which are important for improving osteointegration and cell proliferation. Corrosion resistance tests confirmed a clear increase in corrosion resistance for hybrid-modified samples, especially those with a hydroxyapatite-enriched MAO ceramic layer. Cytocompatibility tests showed increased cell adhesion and proliferation, highlighting the benefits of combining laser and MAO techniques. These results indicate the great potential of the hybrid method in terms of improving the functionality and durability of bone and dental implants.
Influence of hybrid modification on functional properties of a commercial bio-titanium alloy Ti6Al4V
(Elsevier, 2025-07-05) Sypniewska, Joanna; Szkodo, Marek; Majkowska-Marzec, Beata; Pawłowski, Łukasz; Fernández-Hernán, Juan Pablo; Martínez-Campos, Enrique
Although Ti6Al4V is widely used, its surface still needs improvement for medical applications. Here alloy was modified by a two-step process: laser treatment followed by micro-arc oxidation (MAO). This aimed to create a rough surface enriched with bioelements such as sodium, phosphorus, and zinc. SEM analysis revealed a complex but uneven surface, suggesting good potential for further hybrid surface development. Laser treatment improved the alloy’s stability and corrosion resistance. Wettability tests confirmed full hydrophilicity, a key factor in cell response. Notably, the single- and double-modified samples without nZnO showed the best biological performance, likely due to their high hydrophilicity.