二、三元镍钛诺的电、磁、电抛光表面微图案。

Q4 Medicine
Dharam Persaud-Sharma, Norman Munroe, Anthony McGoron
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引用次数: 0

摘要

在本研究中,原子力显微镜(AFM)粗糙度分析对非商用镍钛诺合金进行了电抛光(EP)和磁电抛光(MEP)表面处理和市产支架,通过测量合金表面不同尺寸区域的均方根(RMS),平均粗糙度(Ra)和表面积(SA)值,范围从(800 × 800 nm)到(115 × 115μm),以及(800 × 800 nm)到(40 × 40 μm)。结果表明,在(115 × 115 μm)范围内,niti - ta10 wt%经过EP表面处理的合金整体粗糙度最高,而niti - cu10 wt%合金的粗糙度最低。扫描电镜(SEM)和能谱(EDS)分析显示,表面处理合金具有独特的表面形貌,并且在MEP和EP表面处理合金和非表面处理合金的晶界处存在三元元素Cr和Cu的聚集。三元镍钛诺合金的这种表面微图案可以增加细胞粘附并加速血管内支架的表面内皮化,从而减少支架内再狭窄的可能性,并提供对血流动力学流动机制和受这种表面微图案影响的植入式装置腐蚀行为的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electro and Magneto-Electropolished Surface Micro-Patterning on Binary and Ternary Nitinol.

In this study, an Atomic Force Microscopy (AFM) roughness analysis was performed on non-commercial Nitinol alloys with Electropolished (EP) and Magneto-Electropolished (MEP) surface treatments and commercially available stents by measuring Root-Mean-Square (RMS), Average Roughness (Ra), and Surface Area (SA) values at various dimensional areas on the alloy surfaces, ranging from (800 × 800 nm) to (115 × 115μm), and (800 × 800 nm) to (40 × 40 μm) on the commercial stents. Results showed that NiTi-Ta 10 wt% with an EP surface treatment yielded the highest overall roughness, while the NiTi-Cu 10 wt% alloy had the lowest roughness when analyzed over (115 × 115 μm). Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) analysis revealed unique surface morphologies for surface treated alloys, as well as an aggregation of ternary elements Cr and Cu at grain boundaries in MEP and EP surface treated alloys, and non-surface treated alloys. Such surface micro-patterning on ternary Nitinol alloys could increase cellular adhesion and accelerate surface endothelialization of endovascular stents, thus reducing the likelihood of in-stent restenosis and provide insight into hemodynamic flow regimes and the corrosion behavior of an implantable device influenced from such surface micro-patterns.

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来源期刊
Trends in Biomaterials and Artificial Organs
Trends in Biomaterials and Artificial Organs Medicine-Medicine (miscellaneous)
CiteScore
0.70
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