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Journal of Dental and Oral Health

JDOH

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Research Article

Influence of Temperature and pH on Corrosion Resistance of Ni-Cr and Co-Cr Dental Alloys on Oral Environment

Tbrah Saleh, Johan Andre Mars, Ntevheleni Thovhogi, Dhiro Gihwala, Abd Almonam Baleg, Malik Maaza

Correspondence Address :

Tbrah Saleh
Faculty of Health and Wellness Sciences
Cape Peninsula University of Technology CPUT
Symphony Way (off Robert Sobukwe Road)
Bellville 7535, Western Cape Province
South Africa
Email: Tbrah1983@gmail.com

Received on: May 28, 2015, Accepted on: June 10, 2015, Published on: June 22, 2015

Citation: Saleh T, Andre Mars J, Thovhogi N, Gihwala D, Baleg AA, Maaza M (2015). Influence of Temperature and pH on Corrosion Resistance of Ni-Cr and Co-Cr Dental Alloys on Oral Environment

Copyright: 2015 Tbrah Saleh, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

  • Abstract

Abstract
The aim: The study was to evaluate the influence of temperature and pH on corrosion resistance of Ni-Cr and Co-Cr dental alloys, in order to characterize the physical and mechanical properties of corrosion resistance property of the Ni-Cr and Co-Cr and investigate the correlations between corrosion and biocompatibility of dental alloys and to
interpret the results by comparison with ion concentrations found in necessary food.
Methods: In this work, the corrosion behavior of three different dental alloys, namely PD CASTA H, CERACAST NB Beryllium Free, and PD 2000 alloys were tested in Ringer's solution, artificial saliva at different pH values and temperature. The dental alloys were immersed in the Ringer's solution for 14 days. The surface analysis was by scanning electron microscopy (SEM) and Energy dispersive spectrometry (EDS). The electrochemical characteristics of individual metal components was also investigated using cyclic voltammetry methods.
Results: On the basis of the results obtained it has been shown that the corrosion behavior of PD CASTA H and PD 2000 alloys, which contain Co and a high Cr content, shows the best corrosion resistance compared with that of CERACAST NB alloy in Ringer's solution artificial saliva. And the influence in temperature, acidity and alkalinity of solution effects on the properties of dental alloys in the oral cavity.
Conclusions and recommendations for further work: On the basis of the results obtained, our advice would be to recommend to avoid an increase in the oral temperature and avoid the taking of acid food which are probably to lower the pH of the oral cavity and increase the corrosion of the alloys when the removable or fixed partial dentures treatment.

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