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In vitro corrosion behaviour and microhardness of high‐copper amalgams with platinum and indium
Author(s) -
LI. B. G. I.,
Aydin A.,
Isûimer A.,
Alpaslan G.
Publication year - 1999
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.1999.00332.x
Subject(s) - indium , copper , indentation hardness , distilled water , materials science , zinc , platinum , corrosion , nuclear chemistry , metallurgy , atomic absorption spectroscopy , chemistry , chromatography , microstructure , biochemistry , physics , quantum mechanics , catalysis
Samples prepared from Luxalloy ® , GS‐80 ® , Permite‐C ® and Logic ® and polished after 24 h by traditional methods were stored in polypropylene tubes containing phosphate‐buffered saline solutions (pH 3·5 and 6·5) and distilled water. The amounts of mercury, silver, tin, copper, zinc, platinum and indium in the test solutions were determined at the first, second, eighth, 52nd and 78th week by atomic absorption spectrometry. At the end of the eighth week the amalgam samples were removed from solutions and evaluated by Rockwell Super Scial Microhardness tester. Statistically significant low amounts of metal ions were measured for Permite‐C ® containing indium and Logic ® containing platinum. The microhardness test results showed that there were statistically significant increases in the microhardness of Permite‐C ® and Logic ® . As a result it was shown that the amalgam samples were affected from corrosion conditions to different degrees. Sample of the Logic ® group that was stored in distilled water, showed smoother surface properties than other amalgam samples containing high copper. However, it was observed that samples of Permite‐C ® group had the smoothest surface properties.