Van Hooreweder Brecht, Lietaert Karel, Neirinck Bram, Lippiatt Nicholas, Wevers Martine
Department of Mechanical Engineering, KU Leuven, Leuven, Belgium.
Department of Materials Engineering, KU Leuven, Leuven, Belgium; (c)3DSystems Leuven, Grauwmeer 14, B-3001 Leuven, Belgium.
J Mech Behav Biomed Mater. 2017 Apr;68:216-223. doi: 10.1016/j.jmbbm.2017.02.005. Epub 2017 Feb 7.
Additive manufacturing techniques such as Selective Laser Melting (SLM) allow carefully controlled production of complex porous structures such as scaffolds. These advanced structures can offer many interesting advantages over conventionally produced products in terms of biological response and patient specific design. The surface finish of AM parts is often poor because of the layer wise nature of the process and adhering particles. Loosening of these particles after implantation should be avoided, as this could put the patient's health at risk. In this study the use of hydrochloric acid and hydrogen peroxide mixtures for surface treatment of cobalt-chromium F75 scaffolds produced by SLM is investigated. A 27% HCl and 8% HO etchant proved effective in removing adhering particles while retaining the quasi-static and fatigue performance of the scaffolds.
选择性激光熔化（SLM）等增材制造技术能够精确控制生产诸如支架之类的复杂多孔结构。就生物反应和患者特定设计而言，这些先进结构相较于传统生产的产品具有诸多有趣的优势。由于增材制造过程的逐层性质以及附着颗粒，增材制造零件的表面光洁度往往较差。植入后应避免这些颗粒松动，因为这可能会危及患者健康。在本研究中，对使用盐酸和过氧化氢混合物对通过选择性激光熔化制造的钴铬F75支架进行表面处理进行了研究。一种含27%盐酸和8%过氧化氢的蚀刻剂被证明在去除附着颗粒的同时能保持支架的准静态和疲劳性能方面是有效的。
