N oble dental alloys are often reused in dental practice by recasting. The aim o f this study was to determine i f repeated casting o f high gold dental alloys has a detrimental effect on alloy microstructure, type o f porosity, structure and microhardness. Results show ed that recasting procedure had a strong effect on the change o f alloy porosity type. It was also fo u n d that alloy microhardness increased with the increase o f the number o f recasting cycles. A t the sam e time the grain growth and changes o f the solid solution phases in the microstructure were observed.