20.500.12556/DiRROS-16829 Tribocorrosive study of new and in vivo exposed nickel titanium and stainless steel orthodontic archwires The surface, corrosion and wear properties of new and in vivo exposed nickel titanium (NiTi) and stainless steel (SS) archwires used in orthodontic treatment were investigated. Electrochemical and tribo-electrochemical tests in artificial saliva were performed in order to define corrosion properties and to estimate wear rate of new and in vivo exposed NiTi and SS archwires. The surface chemical analysis of the passive film on the NiTi and SS archwires before and after tribocorrosion tests was performed by Auger Electron Spectroscopy (AES). In vivo exposed NiTi and SS archwires had better electrochemical properties than new archwires due to the protective nature of oral deposits. Total wear and coefficients of friction were higher among in vivo exposed archwires and higher in NiTi archwires in comparison to SS archwires. The estimated thickness of the TiO2 passive film on as-received NiTi is 8 nm, while the passive Cr2O3 film on as-received SS is just 1–2 nm. On in vivo exposed NiTi archwire, a 60–80 nm thick organic film/dental plaque was observed, and on SS, it was thinner, at about 60 nm. This research shows the importance of combining AES with electrochemical testing, to characterize tribocorrosive properties of NiTi and SS orthodontic archwires. archwires NiTi stainless steel wear ortodontske žice NiTi nerjavno jeklo obraba true false true MDPI AG Angleški jezik Slovenski jezik © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Neznano 2023-08-24 08:16:30 2023-08-24 08:21:31 2023-08-25 03:37:46 0000-00-00 00:00:00 2020 0 0 Nasl. z nasl. zaslona; Opis vira z dne 10. 3. 2020; Članek št. 136; Št. članka: 230; str. 1-11 iss. 3 Vol. 10 Mar. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2020-03-03 544.5/.6 2079-6412 10.3390/coatings10030230 2566759 https://www.mdpi.com/2079-6412/10/3/230 1 c4e70dd3-4234-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22874 RAZ_Kosec_Tadeja_2020.pdf RAZ_Kosec_Tadeja_2020.pdf 1 6DD45907D12075E10F30B79C9412533D 8b982676e9f91dd2546a7451642b96be528015eb8d35e87cf3231f97da1ad3cc 62dfcd7e-4235-11ee-8cc8-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=22875 Zavod za gradbeništvo Slovenije 0 0 0