"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Study of the corrosion process for some dental metal alloys under influence of the artificial saliva enriched with yeast and Streptococus Mutans bacteria

E. GÂTIN1,* , C. BERLIC1, B. IORDACHE2, P. PRIOTEASA3

Affiliation

  1. University of Bucharest, Faculty of Physics, Department of Polymer Physics, P.O. Box 11 MG, Măgurele - Bucharest, Romania
  2. ”Carol Davila” University of Medicine and Pharmacy, Dept. of Prostheses Technology & Dental Materials, Calea Plevnei 16, Sector 5, Bucharest, Romania
  3. INCDIE ICPE-CA, Institute of Electrical Engineering-Advanced Researches, Bucharest, Romania

Abstract

Nowadays, a high interest is focussed to obtain improved fix or mobile dental prostheses. For this purpose it is used a large variety of metal alloys, making difficult to evaluate technical, biological and clinical properties of all these materials. The present study establishes the results of investigation for electrochemical behaviour of some commercial metal alloys such as: nickel alloy, Co-Cr alloy and AuAgPd. The investigation was performed using a medium of Fusayama-Meyer artificial saliva. For a complete test, sterile artificial saliva was enriched by addition of yeast extract, to attempt the development of the bacteria, in order to study the influence of Streptococcus Mutans in the process of corrosion on metal alloys. By studying the evolution of the open-circuit potential, its shift in negative direction was attributed to the metabolism of bacteria. Along potentiodynamic curves, high corrosion currents were observed for the potentials between -0.58 V and +0.26 V vs. ECS reference electrode. For the presence of yeast extract and bacteria as well, the Ni and Co - Cr metal alloys presented the passivity characteristics, whereas for AuAgPd alloy higher corrosion currents were observed.

Keywords

Dental alloys, Corrosion, Nyquist diagrams, Electrochemistry, Artificial saliva, Streptococcus Mutans.

Submitted at: Nov. 1, 2009
Accepted at: Nov. 19, 2009

Citation

E. GÂTIN, C. BERLIC, B. IORDACHE, P. PRIOTEASA, Study of the corrosion process for some dental metal alloys under influence of the artificial saliva enriched with yeast and Streptococus Mutans bacteria, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 11, pp. 1870-1873 (2009)