CoCr F75 scaffolds produced by additive manufacturing: Influence of chemical etching on powder removal and mechanical performance. (April 2017)

• Record Type: Journal Article
• Authors: Van Hooreweder, Brecht; Lietaert, Karel; Neirinck, Bram; Lippiatt, Nicholas; Wevers, Martine
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 68(2017)
• Page Start: 216
• Page End: 223
• Publication Date: 2017-04
• Subjects: Selective laser melting (SLM) -- CoCr scaffolds -- Surface roughness -- Surface modification -- Biomaterials -- Additive manufacturing; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2017.02.005
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: 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% H2 O2 etchant proved effective in removing adhering particles while retaining the quasi-static and fatigue performance of the scaffolds