Which material in amalgam is known to slow corrosion?

The material in amalgam known to slow corrosion is copper. Copper enhances the mechanical properties of amalgam while also playing a crucial role in reducing the susceptibility of the material to corrosion, especially in a moist oral environment. When copper is included in amalgam, it forms copper-rich phases that are more stable and less prone to deterioration over time compared to other components.

In addition to its corrosion resistance, copper contributes to the strength and durability of the amalgam restoration, making it a preferred choice in modern dental amalgam formulations. The presence of zinc, though it has some beneficial properties, primarily acts as a scavenger to reduce oxidation during the amalgamation process but is not as effective in increasing corrosion resistance as copper. Understanding the function of these materials is vital for ensuring long-lasting dental restorations.