Corrosion Resistance and Microstructure of Recasting Cobalt Alloys Used in Dental Prosthetics

• Autorzy: Loch J. , Krzykała A. , Łukaszczyk A. , Augustyn-Pieniążek J.

Identyfikatory

DOI

10.1515/afe-2017-0052

• Języki publikacji: EN

Abstrakty

EN

The work presents the results of the studies of Co-Cr-Mo casting alloys used in the production of frame casts of removable dentures, crowns and bridges in dental prosthetics. The studies were performed on four Co-Cr-Mo alloys of different contents of Mo, W and other additives. Electrochemical tests were performed, which aimed at examining the corrosion resistance of the alloys and observing the alloy structure after chronoamperometric tests with the potential in the area of the occurrence of the passive layer breakpoint. The alloy microstructure images after chronoamperometric tests show the presence of non-uniformly distributed general corrosion. Moreover, a project of cobalt alloy casting was elaborated using a ceramic mold casting. Additionally, analysis of the obtained microstructure was performed. The microstructure of the examined alloys was of the dendrite type. This microstructure was chemically inhomogeneous and consisted of an austenitic matrix formed by a solid cobalt solution and chromium in the core dendritic structure.

Słowa kluczowe

EN

investment casting technology; ceramic moulds; dental prosthetics; cobalt alloys; corrosion resistance

PL

technologia odlewania; formy ceramiczne; protetyka stomatologiczna; stopy kobaltu; odporność na korozję

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 63--68
• Opis fizyczny: Bibliogr. 21 poz., il., rys., tab., wykr.

Twórcy

autor

Loch J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Krakow, Poland

autor

Krzykała A.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Krakow, Poland

autor

Łukaszczyk A.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Krakow, Poland

autor

Augustyn-Pieniążek J.

• AGH University of Science and Technology in Krakow, Faculty of Metals Engineering and Industrial Computer Science, ul. Czarnowiejska 66, 30-054 Krakow, Poland

Bibliografia

• [1] Khamis, E. & Seddik, M. (1995). Corrosion evoluation of recasting non – precious dental allays. International Dental Journal. 45(3), 209-217.
• [2] Biomedical materials: Laboratory of materials science. Lodz University of Technology, Faculty of Mechanical Engineering, Institute of Materials Science and Engineering. Retrieved May 15, 2016, form http://iim.p.lodz.pl/media/materialy/mat-kier-MiBM-AiR-PiP Trans/Cwiczenie%2013.pdf (in Polish).
• [3] Górny, Z. (2008). Foundry cobalt alloys. Structure, properties, melting and casting. Foundry Review (Przegląd Odlewnictwa). 58(7-8), 420-430. (in Polish).
• [4] Giachci, J.V., Morando, C.N., Fornaro, O. & Palacio, H.A. (2011). Microstructural characterization of as - cast biocompatible Co-Cr-Mo alloys. Materials Characterization. 62(1), 53-61.
• [5] Augustyn-Pieniążek, J. & Wilkosz, K. (2013). Structural defects of metallic prosthetic dental. Modern Dental Technician (Nowoczesny Technik Dentystyczny). 2, 30-36 (in Polish).
• [6] Hajduga, M., Kosiba A. (2004). Analysis of typical casting defects of metallic prostheses. Research Journals of the Faculty of Applied Mechanics. Silesian University of Technology. 24, 99-104 (in Polish).
• [7] Surowska, B., Beer, K., Borowicz, J. & Veremchuk, J. (2011). Effect of the casting technology on the quality of a stomatological cobalt alloy. Progress of Science and Technology (Postęp Nauki i Techniki). 11, 81-88. (in Polish).
• [8] Craig, R.G., Powers, J.M. & Wataha, J.C. (2008). Dental Materials. Wroclaw. Elsevier Urban & Partner.
• [9] Polak, A. (2005). The theoretical basis and practical guidance in the field of foundry. Nowoczesny Technik Dentystyczny. 2, 28-36. (in Polish).
• [10] Gawroński, J., Szajnar, J., Stawarz, M., Wojarski, T. (2013). Artistic Casting. Gliwice. Silesian University of Technology (in Polish).
• [11] Lewandowski, J. (1997). Materials for molds. Krakow. Akapit (in Polish).
• [12] Yuan, C. & Jones, S. (2003). Investigation of fibre modified ceramic moulds for investment casting. Journal of the European Ceramic Society. 23, 399-407.
• [13] PN – EN ISO 10993 – 15, Biological evaluation of medical devices – Vol. 15; Identification and quantification of degradation products identified metals and alloys 2005 (in Polish).
• [14] Augustyn-Pieniążek, J., Łukaszczyk, A., Szczurek, A. & Sowińska, K. (2014). Structure and properties of dental cobalt alloys used to perform framed dentures. Materials Engineering. 34(2), 116-120. (in Polish).
• [15] Yamanaka, K., Mori, M. & Chiba, A. (2014). Effects of carbon concentration on microstructure and mechanical properties of as cast nickiel – free Co-28Cr-9W-based dental alloys. Materials Science and Engineering C. 40, 127-134.
• [16] Podrez-Radziszewska, M., Haimann, K., Dudziński, W. & Morawska-Sołtysik, M. (2010). Characteristic of intermetallic phases in cast dental CoCrMo alloy. Archives of Foundry Engineering. 10(3), 51-56.
• [17] Giacci, J.V., Morando, C.N., Fomaro, O. & Palacio, H.A. (2011). Microstructural characterization of as-cast biocompatible Co-Cr-Mo alloys. Materials Characterization. 62, 53÷61.
• [18] Mc Cafferty, E. & Hubler, G.K. (1978). Electrochemical behavior of palladium-implanted titanium. Journal of the Electrochemical Society. 125(11), 1892-1893.
• [19] Metikos-Huković, M., Pilić, Z., Babić, R. & Omanović, D. (2006). Influence of alloying elements on the corrosion stability of CoCrMo implant alloy in Hank’s solution. Acta Biomaterialia. 2(6), 693-700.
• [20] Augustyn-Pieniążek, J., Łukaszczyk, A. & Zapała, R. (2013). Microstructure and corrosion resistance characteristics of Co-Cr-Mo alloys designed for prosthetic materials; Archives of Metallurgy and Materials. 58(4), 1281-1285.
• [21] Loch, J., Łukaszczyk, A., Augustyn-Pieniążek, J. & Krawiec, H. (2015). Electrochemical behaviour of Co-Cr and Ni-Cr dental Alloy. Solid State Phenomena. 227, 451-454.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)