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Comparison of disinfectant solutions effect on speed of Cobalt – Chromium Alloy corrosion
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Homira Ansarilari   , Adel Abtahi , Sarira Mehrabanjahromi * , Mohamadreza Sazvar , Loghman Ghahramani |
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Abstract: (1395 Views) |
ABSTRACT
Background and Aim: Corrosion may be a consequence of disinfecting and cleansing of partial denture chromium – cobalt frameworks using chemical disinfectants and cleansers. There is short information in literature about the effect of these solutions, in comparison with each other, on the corrosion rate of chromium – cobalt alloy. The present study was designed to compare corrosion rate of the chromium – cobalt alloy in disinfecting solutions.
Materials and Methods: In this experimental in-vitro study, corrosion rates of 35 chromium-cobalt immersed in7disinfecting solutions were determined. As a complementary test , samples were immersed in two groups of solutions which showed the least and the most corrosion rates as measured by electrochemical tests for a period of one week and their surface and also surface of one untreated control sample was photographed under a scanning electron microscope . Corrosion rates obtained, were statistically analyzed using variance analysing test and multiple comparisons were made using Tukey HSD and Dunnett tests.
Results: The corrosion rates of chromium cobalt sample in the studied solutions from the highest to lowest , were : Sodium Hypochlorite 1%, Fittydent 1 tab/250ml , Micro 10+ 5% , Korsolex Plus 3% , Deconex 53 Plus 2% . Corrosion rates were statistically different in the studied solutions (P<0.05). SEM photographs showed no evidence of corrosion on control sample and samples immersed in Decomex 53 Plus 2% , but localized corrosion was observed on samples immersed in Sodium Hypochlorite 1% .
Conclusion: The present study indicated that Sodium Hypochlorite at the concentration of 1% or more for the purpose of disinfection and cleansing of chromium-cobalt not be used.
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| Keywords: Corrosion, Chromium, Cobalt, Dental Disinfectant |
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Full-Text [PDF 564 kb]
(888 Downloads)
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Type of Study: original article |
Subject:
Prothesis
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