The purpose of this study was to develop the dental casting low carat gold alloys based upon Au-A.g-Cu ternary gBoy. Three types of low carat gold alloy containing 46, 55 and 66wt. % of gold, content respectively, which were balanced with total amount of Au plus Ag of 75wt. %, were melted and casted to evaluate the mechanical properties, mmsion resistance, melting range and cytotoxicity,
The obtained results were summarized follows
In mechanical properties; the type K- H alloys, which was increased in the amount of Pt component, showed 115MPa of yield strength, 40011/1Ya of ultimate tensile strength and 150 of wicker´s hardness value and these values are higher than those of K- 1, K-1H alloy of 30% in yield strength, 50% in ultimate tensile strength and 10% in hardness value.
Age hardening effect was confirmed in all three alloys.
Melting ranges of these alloys were in the range ´of 910-1050 C
Higher corrosion resistance was confirmed in the potential range of oral cavity.
The cytotoxicity of alloys was evaluated by the cell growth and morphologic changes; Each alloy showed normal grow th -ate and cellular morphology.
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