In amalgam restorations, the elimination of voids is primarily important for which reason?

In amalgam restorations, the elimination of voids is crucial for enhancing marginal integrity. Voids can act as points of weakness within the restoration, which can compromise the seal between the restoration and the tooth structure. When marginal integrity is improved, the likelihood of bacteria entering the space between the restoration and the tooth is diminished, leading to a lower risk of secondary caries and preserving the longevity of the restoration.

Moreover, better marginal integrity ensures a more effective distribution of forces during chewing, which is vital for maintaining the restoration's structural integrity over time. The reduction of voids ultimately contributes to a stronger bond between the tooth and the restoration, enhancing overall performance and durability.

While better visual appearance, decreased risk of fracture, and reduction in thermal sensitivity are important considerations in amalgam restorations, they are not directly linked to the elimination of voids as strongly as enhanced marginal integrity is. This highlights the primary reason for addressing voids in the preparation and placement of amalgam materials.