World Journal of Dentistry

Register      Login

VOLUME 8 , ISSUE 6 ( November-December, 2017 ) > List of Articles


Evaluation of Corrosive Behavior of Four Nickel–chromium Alloys in Artificial Saliva by Cyclic Polarization Test:An in vitro Study

Citation Information : Evaluation of Corrosive Behavior of Four Nickel–chromium Alloys in Artificial Saliva by Cyclic Polarization Test:An in vitro Study. World J Dent 2017; 8 (6):477-482.

DOI: 10.5005/jp-journals-10015-1490

License: CC BY-SA 4.0

Published Online: 01-12-2017

Copyright Statement:  Copyright © 2017; The Author(s).


Introduction: Dental casting alloys made of high noble alloys, noble alloys, and predominantly base metal alloys have been used in the fabrication of fixed and removable prosthetic dental appliances. Nickel–chromium (NiCr) alloy has been widely used in the fabrication of fixed and removable partial denture frameworks owing to its superior physical properties and lower cost, but their resistance to tarnish and corrosion is debatable. Aim: The aim of this study is to evaluate and compare the corrosive behavior of four commercially available NiCr alloys with that of a high noble alloy. Materials and methods: Four commercially available NiCr alloys (study groups) and high noble alloy were used to study the corrosion by cyclic polarization test, and the parameters that were evaluated are corrosion potential (Ecorr), breakdown potential (Eb), repassivation potential (Ep), and corrosion current (Icorr). Results: When all the findings from the four parameters were evaluated, the values of the control group were significantly higher than the study groups, and among the four study groups, group III alloy was significantly more resistant to corrosion than the other alloy groups. Conclusion: Within the base metal alloy study groups, group III behaves to be more resistant to corrosion. Both nickel and chromium ions were released during the corrosion process, but the percentage of nickel ions was relatively higher than chromium ions. Clinical significance: With the advent of new dental alloys in the market, the biocompatibility of dental materials is of critical concern and the evaluation of corrosive behavior of new dental alloys is highly warranted. Keywords: Chromium, Corrosion, Cyclic polarization, Nickel, Noble alloy. How to cite this article: Begum R, Ariga P, Jain AR. Evaluation of Corrosive Behavior of Four Nickel–chromium Alloys in Artificial Saliva by Cyclic Polarization Test: An in vitro Study. World J Dent 2017;8(6):477-482.

PDF Share
  1. Anusavice, KJ. Phillipes science of dental materials. 11th ed. Philadelphia (PA): WB Saunders; 2003. p. 573
  2. Changes in mechanical properties and microstructure following heat treatment of a nickelchromium base alloy. J Prosthet Dent 1984 Dec;52(6): 821-827
  3. The glossary of prosthodontic terms. J Prosthet Dent 2005 Jul;94(1):10-92
  4. Use of photoelectron spectroscopy and cyclic polarization to evaluate the corrosive behavior of six nickel-chromium alloys before and after porcelain-fused-to-metal firing. J Prosthet Dent 2000 Dec;84(6):623-634
  5. Nickel-chromium alloys in casting. Miss Dent Assoc J 1982 Winter;38(4):18-20
  6. Changes in composition of a nickel based partial denture casting upon fusion and casting. Aust Dent J 1975 Feb;20(1):14-18
  7. Corrosion in a biological environment. In: Lang BR, Morris HF, Razzoog ME, editors. Biocompatibility, toxicity, and hypersensitivity to alloy systems used in dentistry. Ann Arbor (MI): The University of Michigan School of Dentistry; 1986. pp. 103-122
  8. Electrochemical corrosion of metallic biomaterials. Biomaterials 1984 May;5(3):122-134
  9. Proceedings of the 12th international corrosion congress. Houston (TZ): NACE; 1993. p. 1226
  10. The release of elements of dental casting alloys into the cell-culture medium. J Dent Res 1991 Jun;70(6):1014-1018
  11. Biocompatibility testing of dental restorative materials. Clin Oral Investig 1997 Dec;1(4):154-162
  12. Metal release from dental biomaterials. Biomaterials 1986 May;7(3):163-175
  13. Evaluation of high Ni-Cr-Mo alloys for the construction of sulphur dioxide scrubber plants. J Mater Sci Eng Perform 1996 Feb;5(1):46-50.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.