Thermal expansion and corrosion resistance of cobalt-chromium alloys fabricated by contemporary manufacturing processes. An in vitro study
Abstract
In Purpose: The fabrication technique can influence the mechanical properties of Cobalt-Chromium (Co-Cr) dental alloys. Hence, the present study aims to determine the corrosion resistance and thermal expansion of alloys manufactured using three contemporary techniques.
Material and Methods: A total of nine specimens of Co-Cr alloy were prepared according to ISO 22674 by each one of the three manufacturing processes (three in each process); conventional casting, direct metal laser sintering (DMLS) and milling (MIL). All these specimens were tested for coefficient of thermal expansion and corrosion resistance. The data was tabulated and analyzed statistically.
Results: The difference in the thermal expansion of alloys fabricated using three techniques was non-significant at almost all the temperatures from 50 ºC to 950 ºC (p>0.05), except 450 ºC and 600 °C. The polarization resistance of specimens manufactured using the conventional method was more compared to DMLS and MIL at pH 5 (Conventional>MIL>DMLS) (p<0.001).
Conclusion: The thermal expansion behavior of alloys manufactured using the three selected techniques were similar, whereas, at acidic pH, the corrosion resistance of conventional and MIL were better than the DMLS.
References
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2. Hedberg YS, Qian B, Shen Z, Virtanen S, Wallinder IO. In vitro biocompatibility of CoCrMo dental alloys fabricated by selective laser melting. Dent. Mater. 2014;30:525-534.
3. Kocaagaoglu H, Kılınc HI, Albayrak H, Kara M. In vitro evaluation of marginal, axial, and occlusal discrepancies in metal ceramic restorations produced with new technologies. J. Prosthet. Dent. 2016;116:368-374.
4. Al-Khafagy MT. Thermal expansion of prepared dental base-metal casting alloys. J. Baghdad. Coll. Dent. 2008;20 :8-13.
5. Kim MJ, Choi YJ, Kim SK, Heo SJ, Koak JY. Marginal accuracy and internal fit of 3-D printing laser-sintered Co-Cr alloy copings. Materials. 2017;10: 93-105.
6. Schmalz G, Arenholt-Bindslev D. Biocompatibility of dental materials. Berlin: Springer; 2009.
7. Qiu J, Yu WQ, Zhang FQ. Effects of the porcelain-fused-to-metal firing process on the surface and corrosion of two Co–Cr dental alloys. J. Mater. Sci. 2011;46: 1359-1368.
8. Krug KP, Knauber AW, Nothdurft FP. Fracture behavior of metal-ceramic fixed dental prostheses with frameworks from cast or a newly developed sintered cobalt-chromium alloy. Clin. Oral. Investig. 2015;19: 401-411.
9. Zeng L, Xiang N, Wei B. A comparison of corrosion resistance of cobalt- chromium-molybdenum metal ceramic alloy fabricated with selective laser melting and traditional processing. J. Prosthet. Dent. 2014;112:1217-1224.
10. Fasbinder DJ. Clinical performance of chairside CAD/CAM restorations. J. Am. Dent. Assoc. 2006;137: 22S-31S.
11. Xin XZ, Chen J, Xiang N, Wei B. Surface properties and corrosion behavior of Co–Cr alloy fabricated with selective laser melting technique. Cell. Biochem. Biophys. 2013; 67:983-990.
12. Averyanova M, Bertrand P, Verquin B. Manufacture of Co-Cr dental crowns and bridges by selective laser Melting technology. Virtual. Phys. Prototyp. 2011;6:179- 185.
13. Al Jabbari YS, Koutsoukis T, Barmpagadaki X, Zinelis S. Metallurgical and interfacial characterization of PFM Co–Cr dental alloys fabricated via casting, milling or selective laser melting. Dent. Mater. 2014;30: e79-88.
14. Xin XZ, Xiang N, Chen J, Xu D, Wei B. Corrosion characteristics of a selective laser melted Co–Cr dental alloy under physiological conditions. J. Mater. Sci. 2012 ;47:4813-4820.
15. Giacchi JV, Morando CN, Fornaro O, Palacio HA. Micro structural characterization of as-cast biocompatible Co–Cr–Mo alloys. Mater. Charact. 2011;62:53-61.
16. Ucar Y, Brantley WA, Johnston WM, Dasgupta T. Mechanical properties, fracture surface characterization, and microstructural analysis of six noble dental casting alloys. J. Prosthet. Dent. 2011;105:394-402.
17. Mengucci P, Barucca G, Gatto A, Bassoli E, Denti L, Fiori F, Girardin E, Bastianoni P, Rutkowski B, Czyrska-Filemonowicz A. Effects of thermal treatments on microstructure and mechanical properties of a Co–Cr–Mo–W biomedical alloy produced by laser sintering. Journal of the mechanical behavior of biomedical materials 2016; 60:106-117.
18. Kim H, Jang SH, Kim Y, Son J, Min B, Kim KH, Kwon TY. Microstructures and mechanical properties of Co-Cr dental alloys fabricated by three CAD/CAM- based processing techniques. Materials. 2016; 9: 596-609.
19. Jang SH, Lee DH, Ha JY, Hanawa T, Kim KH, Kwon TY. Preliminary evaluation of mechanical properties of Co-Cr alloys fabricated by three new manufacturing processes. Int. J. Prosthodont. 2015;28:396-398.
20. Kassapidou M, Hjalmarsson L, Johansson CB, Johansson PH, Morisbak E, Wennerberg A, Stenport VF. Cobalt–chromium alloys fabricated with four different techniques: Ion release, toxicity of released elements and surface roughness. Dent. Mater. 2020;36:e352-63.
21. Kassapidou M, Stenport VF, Johansson CB, Ostberg AK, Johansson PH, Hjalmarsson L. Inflammatory response to cobalt-chromium alloys fabricated with different techniques. Journal of Oral & Maxillofacial Research. 2021;12(4).
22. Oilo M, Nesse H, Lundberg OJ, Gjerdet NR. Mechanical properties of cobalt-chromium 3-unit fixed dental prostheses fabricated by casting, milling, and additive manufacturing. The Journal of prosthetic dentistry. 2018 Jul 1;120(1):156-e1.
23. Barazanchi A, Li KC, Al-Amleh B, Lyons K, Waddell JN. Mechanical properties of laser-sintered 3D-printed cobalt chromium and soft-milled cobalt chromium. Prosthesis. 2020 Oct 12;2(4):313-320.
24. Al-saady AA, EanasIttihad J, AI-obaidy AS. Marginal discrepancy of cobalt chromium metal copings fabricated with three different techniques. J. Am. Sci. 2015;11:105-110.
25. Van Noort R. The future of dental devices is digital. Dent. Mater. 2012; 28:3-12.
26. Ortorp A, Jönsson D, Mouhsen A, von Steyern PV. The fit of cobalt–chromium three-unit fixed dental prostheses fabricated with four different techniques: A comparative in vitro study. Dent. Mater. 2011;27: 356-363.
27. Willer J, Rossbach A, Weber HP. Computer-assisted milling of dental restorations using a new CAD/CAM data acquisition system. J. Prosthet. Dent. 1998; 80:346-353.
28. Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y. A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent. Mater. 2009;28:44-56.
29. Samet N, Resheff B, Gelbard S, Stern N. A CAD/CAM system for the production of metal copings for porcelain-fused-to-metal restorations. J. Prosthet. Dent. 1995; 73:457-463.
30. Strub JR, Rekow ED, Witkowski S. Computer-aided design and fabrication of dental restorations: current systems and future possibilities. J. Am. Dent. Assoc. 2006;137:1289-1296.
31. Akova T, Ucar Y, Tukay A, Balkaya MC, Brantley WA. Comparison of the bond strength of laser-sintered and cast base metal dental alloys to porcelain. Dent. Mater. 2008;24:1400-1404.
32. Kellerhoff RK, Fischer J. In vitro fracture strength and thermal shock resistance of metal-ceramic crowns with cast and machined AuTi frameworks. J. Prosthet. Dent. 2007; 97:209-215.
33. Stawarczyk B, Eichberger M, Hoffmann R, Noack F, Schweiger J, Edelhoff D, Beuer F. A novel CAD/CAM base metal compared to conventional CoCrMo alloys: an in-vitro study of the long-term metal-ceramic bond strength. Oral. Health. Dent. Manag. 2014;13:446-452.
34. Wataha JC. Alloys for prosthodontic restorations. J. Prosthet. Dent. 2002;87:351- 363.
35. Bishara SE, Barrett RD, Selim MI. Biodegradation of orthodontic appliances. Part II. Changes in the blood level of nickel. Am. J. Orthod. Dentofac. Orthop. 1993;103: 115-119.
36. Messer RL, Lucas LC. Cytotoxicity of nickel–chromium alloys: bulk alloys compared to multiple ion salt solutions. Dent. Mater. 2000;16: 207-212.
37. Viennot S, Dalard F, Lissac M, Grosgogeat B. Corrosion resistance of cobalt‐chromium and palladium‐silver alloys used in fixed prosthetic restorations. Eur. J. Oral. Sci. 2005;113: 90-95.
38. Patro TK, Singh BP, Singh V. Corrosion behaviour of an indigenous Ag‐Sn‐Cu cast dental alloy in artificial saliva. J. Oral. Rehabil. 1998; 25:292-298.
39. Angelini E, Cordano E, Kaciulis S, Mattogno G, Pandolfi L, Pinasco MR, Rosalbino F. XPS and electrochemical characterization of tarnish films on dental alloys. Surface and Interface Analysis: An International Journal devoted to the development and application of techniques for the analysis of surfaces, interfaces and thin films 2000;30:50-55.
40. Hama Suleiman S, Vult von Steyern P. Fracture strength of porcelain fused to metal crowns made of cast, milled or laser-sintered cobalt-chromium. Acta. Odontologica. Scandinavica. 2013;71:1280-1289.
Published
2022-10-31
How to Cite
BALAJI, Bonothu et al.
Thermal expansion and corrosion resistance of cobalt-chromium alloys fabricated by contemporary manufacturing processes. An in vitro study.
Journal of Oral Research, [S.l.], v. 11, n. 5, p. 1-12, oct. 2022.
ISSN 0719-2479.
Available at: <https://joralres.com/index.php/JOralRes/article/view/joralres.2022.058>. Date accessed: 23 apr. 2024.
doi: https://doi.org/10.17126/joralres.2022.058.
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Articles
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