How does less mercury in condensed amalgam affect the restoration?

When less mercury is used in condensed amalgam, the resulting restoration benefits from several mechanical and physical properties that enhance its performance. With a reduced mercury content, there is a higher proportion of metal alloy particles in the amalgam mixture. This leads to a denser and more cohesive material because the metal particles act as a framework that provides structural integrity.

The strength of the restoration is primarily due to the metallic components, which are more resilient compared to mercury. Fewer voids are present in a properly condensed amalgam, as high mercury content can sometimes lead to an uneven distribution and, consequently, trapped air bubbles or unreacted components. By minimizing mercury and maximizing the metal matrix, the restoration becomes stronger and more durable.

In contrast, increased mercury content can lead to weakened structural properties and potentially more voids, as there may not be sufficient metal alloys to ensure a solid structure. Therefore, a restoration with less mercury results in a stronger, more reliable outcome, making it the best choice in ensuring long-lasting dental repairs.