When condensing amalgam into an ideal depth MOD preparation, which area should be condensed first?

When condensing amalgam into an ideal depth mesio-occlusal-distal (MOD) preparation, the approach taken is crucial for ensuring both the effectiveness of the restoration and the longevity of the filling. The correct choice is to condense the least accessible area first.

This technique is essentially about the order of condensation to optimize the density and integrity of the amalgam. Starting with the least accessible area—often the distal portion of the cavity preparation—ensures that this critical space is adequately filled and condensed without the risk of voids. Once this area is secured, the more accessible regions can be addressed subsequently, allowing for a thorough compaction throughout the entire preparation.

This strategy not only improves the seal and reduces the likelihood of microleakage but also ensures that the amalgam is adequately packed where it is most challenging to reach, thereby enhancing the overall quality and durability of the restoration. Prioritizing these areas maximizes the physical properties of the amalgam, such as compressive strength, providing a robust filling that can withstand the forces of mastication.