Increasing the amount of copper in amalgam results in which of the following?

Increasing the amount of copper in amalgam is associated with decreased corrosion. Copper plays a significant role in enhancing the properties of dental amalgam, primarily by forming stable compounds that resist the corrosive effects of oral fluids. Higher copper content leads to the formation of copper-rich phases, which provide improved resistance to corrosion, ultimately leading to greater longevity and durability of the dental restoration.

In dental applications, an amalgam with a higher copper concentration not only decreases the potential for deterioration due to corrosion but also enhances the overall mechanical properties of the material, including strength and wear resistance. This is crucial as it helps in maintaining the integrity of the restoration over time, particularly in the challenging environment of the mouth where constant exposure to moisture and a variety of pH levels occurs.