In Vitro Physical-Chemical Behaviour Assessment of 3D-Printed CoCrMo Alloy for Orthopaedic Implants

Autor: Radu Mirea, Iuliana Manuela Biris, Laurentiu Constantin Ceatra, Razvan Ene, Alexandru Paraschiv, Andrei Tiberiu Cucuruz, Gabriela Sbarcea, Elisa Popescu, Teodor Badea
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Metals, Vol 11, Iss 6, p 857 (2021)
Druh dokumentu: article
ISSN: 2075-4701
DOI: 10.3390/met11060857
Popis: In this study, a CoCrMo-based metallic alloy was manufactured using a 3D-printing method with metallic powder and a laser-based 3D printer. The obtained material was immersed in a simulated body fluid (SBF) similar to blood plasma and kept 2 months at 37 °C and in relative motion against the SBF in order to mimic the real motion of body fluids against an implant. At determined time intervals (24, 72, 168, 336, and 1344 h), both the metallic sample and SBF were characterized from a physical-chemical point of view in order to assess the alloy’s behaviour in the SBF. Firstly, the CoCrMo based metallic sample was characterized by scanning electron microscopy (SEM) for assessing surface corrosion and X-ray diffraction (XRD) for determining if and/or what kind of spontaneous protective layer was formed on the surface; secondly, the SBF was characterized by pH, electrical conductivity (EC), and inductively coupled plasma mass spectroscopy (ICP-MS) for assessing the metal ion release. We determined that a 3D-printed CoCrMo alloy does not represent a potential biological hazard in terms of the concentration of metal ion releases, since it forms, in a relatively short period of time, a protective CoCr layer on its exposed surface.
Databáze: Directory of Open Access Journals