Abstract
Studies to develop laboratory data on conventional silver, high-copper and palladium-enriched amalgams were conducted. The SEM-EDAX chemical comparisons were shown to be similar to the available nominal analyses. Size ranges and surface geometries were correlated. The spherical high-copper alloys revealed higher compressive strength magnitudes, less percentage flow, lower creep and less relative dimensional change than the dispersed phase and conventional lathe-cut alloys, while the lathe-cut amalgam exhibited a different behaviour pattern than the other three high-copper amalgams during corrosion. Microleakage studies revealed similar results for all of the alloys.
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