20.500.12556/RUL-148303 Differences between 3-D printed and traditionally milled CoCr dental alloy from casted block in oral environment The aim of this study was to compare corrosion resistance and ion release in CoCr dental alloys with identical chemical compositions produced using different technologies (SLM – selective laser melting and milling from cast blocks) and heat treatment (SLM parts only). The corrosion properties were tested in artificial saliva, artificial saliva with fluoride ions, and artificial saliva with added lactic acid to simulate inflammations. The study included electrochemical tests, microstructural investigation and ion release tests in the three different environments for a total of 42 days. The best performance of CoCr as a result of potentiodynamic polarization was observed in the artificial saliva with added lactic acid, which is in contradiction with the highest ion release measured from all the materials tested and electrochemical impedance spectroscopy that showed a deterioration of the passive layer in an acidic environment. Microstructural investigation revealed that different phases precipitated by heat treatment trigger increased release of Mo and W ions. The printing method does not raise critically ion release from CoCr alloy, while the state of the surface greatly impacts the extent of the ion release. This study demonstrates the importance of an interdisciplinary approach to the study of corrosion and biocompatibility in dental alloys. CoCr dental alloy selective laser melting corrosion ion release artificial saliva CoCr dentalna zlitina selektivno lasersko raztaljevanje korozija sproščanje ionov umetna slina true false true Angleški jezik Slovenski jezik Članek v reviji 2023-08-11 08:22:12 2023-08-11 08:22:13 2025-08-08 13:22:30 0000-00-00 00:00:00 2023 0 0 11 str. Vol. 445, art. 142066 Mar. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 616.31 1873-3859 10.1016/j.electacta.2023.142066 142379779 1-s2.0-S0013468623002530-main.pdf 1-s2.0-S0013468623002530-main.pdf 1 1B54BA6D77A0B4F635A14251CAC2EE19 a6901175068a9b80128d91ce14c63384daee0dec48c513d9df398991d989ec88 c6ad4644-380f-11ee-b9d7-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172394 https://www.sciencedirect.com/science/article/pii/S0013468623002530 1 6840d808-380f-11ee-b9d7-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=172393 Medicinska fakulteta 0 0 0