Biomaterial Database

Corrosion behaviour of dispersalloy amalgam and non-precious alloys in artificial saliva of different pH. 1990

E Naguib, and M Khalaf, and A G Gad Allah

Operative Dentistry Department, Faculty of Oral and Dental Medicine, Cairo University.

Corrosion behaviour of dispersalloy amalgam and non-precious alloys in artificial saliva of different pH was studied using potential and capacitance measurements. In slightly acidic media, the amount of potential shift for all alloys studied is, small as compared to more acid media, pH = 1.85. On the other hand, in alkaline saliva, especially of higher pH, 12.01, the potential shift for dispersalloy amalgam, is higher than that of non-precious alloys. Further, Wiron S alloy showed the most resistive alloy in such media. The results of capacitance measurements are in general accord with those implied by the potential. The corrosion potential of the non-precious alloys-amalgam combinations reflect the activity of Wiron S-amalgam combination and inertness of the other combination. All amalgam samples exhibit a gradual loss of the surface luster with blackish discoloration and pitting after a long exposure period to the medium.

UI	MeSH Term	Description	Entries
D008422	Materials Testing	The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.	Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D002858	Chromium Alloys	Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc.	Chromium-Cobalt Alloys,Chromium-Nickel Alloys,Cobalt-Chromium Alloys,Nickel-Chromium Alloys,Alloys, Chromium,Alloys, Chromium-Cobalt,Alloys, Chromium-Nickel,Alloys, Cobalt-Chromium,Alloys, Nickel-Chromium,Chromium Cobalt Alloys,Chromium Nickel Alloys,Cobalt Chromium Alloys,Nickel Chromium Alloys
D003343	Corrosion	The gradual destruction of a metal or alloy due to oxidation or action of a chemical agent. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Corrosions
D003722	Dental Alloys	A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.	Alloy, Dental,Alloys, Dental,Dental Alloy
D006863	Hydrogen-Ion Concentration	The normality of a solution with respect to HYDROGEN ions; H+. It is related to acidity measurements in most cases by pH	pH,Concentration, Hydrogen-Ion,Concentrations, Hydrogen-Ion,Hydrogen Ion Concentration,Hydrogen-Ion Concentrations
D012464	Saliva, Artificial	A solution used for irrigating the mouth in xerostomia and as a substitute for saliva.	Artificial Saliva