What is the main advantage of amalgam with a high copper content?

Amalgam with a high copper content demonstrates less corrosion compared to traditional low-copper amalgams. This is primarily due to the chemical composition and microstructure changes that occur when additional copper is incorporated into the alloy.

Higher copper content helps to minimize the formation of corrosion products that can compromise the integrity of the restoration over time. This improved resistance to corrosion enhances the longevity of the dental restoration, ensuring it remains effective and aesthetically pleasing longer than its low-copper counterparts.

While other qualities, such as better marginal sealing or tensile strength, are important in evaluating dental materials, the significant reduction in corrosion is a key characteristic that helps maintain the structural and functional integrity of the restoration in a moist oral environment.