What is the best practice to avoid amalgam overhangs?

The best practice to avoid amalgam overhangs is to ensure proper band and wedge placement. When a matrix band is correctly positioned, it creates a close adaptation to the cavity preparation, which helps to contain the amalgam material within the desired areas. Proper placement includes ensuring that the band is seated snugly against the walls of the cavity preparation, which is critical in preventing excess material from seeping out and creating overhangs.

In addition, the use of a wedge can help ensure that the matrix band stays tight against the tooth structure, especially in interproximal areas. This tight fit not only prevents the formation of overhangs but also ensures proper contact with adjacent teeth, which is vital for maintaining oral health and restoring the function of the tooth.

While other options may contribute to the quality of the restoration, they do not directly address the prevention of amalgam overhangs as effectively as proper band and wedge placement does. Using a thicker matrix band, for example, might provide extra support, but if the band is not positioned well, it won't address the underlying issue related to overhang formation. Similarly, adjusting the setting time or ensuring proper condensation might help with the density and strength of the amalgam but won't directly prevent material from escaping outside